This adds a message to lists_bind_fdt when it skips initializing a device
pre-relocation. I've had a couple errors where a device didn't initialize
properly because one of its dependencies was missing.
Signed-off-by: Sean Anderson <seanga2@gmail.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
At present we only support two phases where devres can be used:
bind and probe. This is handled with a boolean. We want to add a new
phase (platdata), so change this to an enum.
Signed-off-by: Simon Glass <sjg@chromium.org>
The devres functionality has very few users in U-Boot, but it still should
have tests. Add a few basic tests of the main functions.
Signed-off-by: Simon Glass <sjg@chromium.org>
At present when CONFIG_DEBUG_DEVRES is enabled, U-Boot prints log messages
to the console with every devres allocation/free event. This causes most
tests to fail since the console output is not as expected.
In particular this prevents us from adding a device to sandbox which uses
devres in its bind method.
Move devres over to use U-Boot's logging feature instead, and add a new
category for devres.
Signed-off-by: Simon Glass <sjg@chromium.org>
We want to avoid allocating platform data twice. This could happen if
device_probe() is called after device_ofdata_to_platdata() for the same
device.
Add a flag to track whether device_ofdata_to_platdata() has been called on
a device. Check the flag to make sure it doesn't happen twice, and clear
the flag when the data is freed.
Signed-off-by: Simon Glass <sjg@chromium.org>
Add a new internal function, device_ofdata_to_platdata() to handle
allocating private space associated with each device and reading the
platform data from the device tree.
Call this new function from device_probe().
Signed-off-by: Simon Glass <sjg@chromium.org>
At present the parent is probed before the child's ofdata_to_platdata()
method is called. Adjust the logic slightly so that probing parents is
not done until afterwards.
Signed-off-by: Simon Glass <sjg@chromium.org>
This method is supposed to extract platform data from the device tree. It
should be done before the device itself is probed. Move it earlier in the
device_probe() function.
Signed-off-by: Simon Glass <sjg@chromium.org>
Early in boot it is necessary to decode the PCI device/function values for
particular peripherals in the device tree or of-platdata. This is needed
in TPL where CONFIG_PCI is not defined.
To handle this, move pci_get_devfn() into a file that is built even when
CONFIG_PCI is not defined.
Also add a function for use by of-platdata, to convert a reg property to
a pci_dev_t.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
These functions are CPU-related and do not use driver model. Move them to
cpu_func.h
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Bootstage improvements for TPL, SPL
Various sandbox and dm improvements and fixes
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Merge tag 'dm-pull-29oct19' of git://git.denx.de/u-boot-dm
- Fix for patman with email addresses containing commas
- Bootstage improvements for TPL, SPL
- Various sandbox and dm improvements and fixes
Use log() insted of debug() for uclass_find_device_by_seq function,
since this print is very much and we can filter it out with log()
interface.
Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Move #define to top of file as per docs:
Signed-off-by: Simon Glass <sjg@chromium.org>
This function assumes that the 'val' parameter has no masked bits set.
This is not defined by the function prototype though. Fix the function to
mask the value and update the documentation.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
This fixes the case where assigned-clocks is used to define a clock
defaults inside this same clock's node. This is used sometimes to setup a
default parents and/or rate for a clock.
example:
muxed_clock: muxed_clock {
clocks = <&clk_provider 0>, <&clk_provider 1>;
#clock-cells = <0>;
assigned-clocks = <&muxed_clock>;
assigned-clock-parents = <&clk_provider 1>;
};
It doesn't work in u-boot because the assigned-clocks are setup *before*
the clock is probed. (clk_set_parent() will likely crash or fail if called
before the device probe function)
Making it work by handling "assigned-clocks" in 2 steps: first before the
clk device is probed, and then after the clk device is probed.
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
At present the 'Index' column of 'dm tree' assumes there is
two digits, this patch increase it to 3 digits.
It also aligns output of 'dm uclass', assuming the same 3 digits index.
The boards with CONFIG_PINCTRL_FULL activated have one pinconfig
by pin configuration, so they can have more than 100 devices
pinconfig (for example with stm32mp157c-ev1 board we have
106 pinconfig node).
Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
The power domain associated with a device is enabled when probing,
but currently the domain remains enabled when the device is removed.
Some boards started to disable power domains for selected devices
via custom board_quiesce_devices(), but it doesn't work in many
cases, i. e. because devices still can be accessed later in
.remove() callback on behalf of dm_remove_devices_flags().
Utilize the DM core to power off the device power domain, but add a
device flag to be able to selectively let the power domain enabled
after device removal. This might be required for devices that must
remain enabled when booting OS, i. e. serial console for debug
output, etc.
Signed-off-by: Anatolij Gustschin <agust@denx.de>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
In some remoteproc cases, enabling the power domain of the core will
start running the core. In such cases image should be loaded before
enabling the power domain. But the current DM framework enables the
power-domain by default during probe. This is causing the remotecore
to start and crash as there is no valid image loaded.
In order to avoid this introduce a DM flag that doesn't allow for
enabling/disabling the power-domain by DM framework.
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
When multiple power domains attached to a device, need power on
them all, so use dev_power_domain_on to do that.
Signed-off-by: Peng Fan <peng.fan@nxp.com>
For CONFIG_OF_PRIOR_STAGE, in the absence of a device tree alias for a
given device, use the next request number for that type of device.
This allows aliases to be used when they're available, while still
allowing unaliased devices to be probed.
Signed-off-by: Thomas Fitzsimmons <fitzsim@fitzsim.org>
Cc: Bin Meng <bmeng.cn@gmail.com>
Cc: Simon Glass <sjg@chromium.org>
This function ise effectively replaced by ofnode_read_pci_addr() which
works with flat tree. Delete it to avoid code duplication.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
At present PCI address transaction is not supported so drivers must
manually read the correct BAR after reading the device tree info. The
ns16550 has a suitable implementation, so move this code into the core
DM support.
Note that there is no live-tree equivalent at present.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
[bmeng: correct the unclear comments in test.dts]
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
This function returns -ENODEV when there is no device. This is
inconsistent with other functions, such as uclass_find_next_device(),
which returns 0.
Update it and tidy up the incorrect '-1' values in the comments.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
At present this function is never called when of-platdata is enabled since
we never have a device tree. However, this function is responsible for
copying over the of-platdata, so we must call it. Otherwise the probe()
method would have to be used.
Correct this and fix the sandbox serial driver to not read from the device
tree and try to write to what is read-only platdata on some platforms.
Fixes: 396e343b3d (dm: core: Allow binding a device from a live tree)
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Two functions in this file return early for no good reason. Adjust the
code to match the standard DM style of returning 0 at the end of the
function on success.
Oddly enough this save 12 bytes of code size on ARM.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
The pr_debug() functions do not response to setting the log level and in
fact have their own separate log level. Use U-Boot logging instead.
Perhaps we should make these options redirect to log_debug(), etc.?
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
At present this code passes an fdt_addr_t pointer as a u64 pointer which
is not safe, since sizeof(fdt_addr_t) may be 4, e.g. with sandbox. Correct
this to avoid a stack corruption problem.
Fixes: e679d03b08 (core: ofnode: Add ofnode_get_addr_size_index)
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
[bmeng: correct one typo in the commit message]
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
This reads the low cell of the PCI address from the wrong cell. Fix it.
Also fix the function that this code came from.
Fixes: 9e51204527 (dm: core: Add operations on device tree references)
Fixes: 4ea5243a3a (fdt: fix fdtdec_get_pci_addr() for CONFIG_PHYS_64BIT)
Signed-off-by: Simon Glass <sjg@chromium.org>
Tested-by: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This patch adds functions dev_read_u64_default & dev_read_u64
to read unsigned 64-bit values from devicetree.
Signed-off-by: T Karthik Reddy <t.karthik.reddy@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Some of the DM functions depend on OF_CONTROL, which is incorrect.
DM and DT are orthogonal. Add macro guards around such functions to
avoid compiling them in when DM is enabled, while OF_CONTROL is not.
Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Simon Glass <sjg@chromium.org>
Several options are presenting themselves on a various boards
where the options are clearly not used. (ie, SPL/TPL options
when SPL or TPL are not defined)
This patch is not attempting to be a complete list of items, but
more like low hanging fruit. In some instances, I wasn't sure
of DM was required, so I simply made them SPL or TPL.
This patch attempts to reduce some of the menuconfig noise
by defining dependencies so they don't appear when not used.
Signed-off-by: Adam Ford <aford173@gmail.com>
In some case with LIVE DT, some node always not valid, or not have
a valid name, eg. blk driver add by mmc.
Return fail instead of Assert for this kind of ofnode, and this
help with assert happen from time to time when of_live is enabled
and DEBUG is enabled.
Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Current dev_read_*() API lacks support to get address and size
of a "reg" property by name or index. Add support for the same.
Livetree support has been added but not tested on real hardware.
The existing unit tests testing reading address from device-tree
have been updated to test address as well as size.
Reviewed-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Reduce power domain calls when CONFIG_POWER_DOMAIN is disabled.
With gcc v8.2, this change saves 104 bytes.
Signed-off-by: Anatolij Gustschin <agust@denx.de>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Per device tree spec, "status" property can have a value of "okay",
or "disabled", but not "disable".
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Without a valid ofnode, it's meaningless to call clk_set_defaults()
to process various properties.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Add the following functions to translate DMA address to CPU address:
- dev_translate_dma_address()
- ofnode_translate_dma_address()
- of_translate_dma_address()
- fdt_translate_dma_address()
These functions work the same way as xxx_translate_address(), with the
difference that the translation relies on the "dma-ranges" property
instead of the "ranges" property.
Add related test. Test report:
=> ut dm fdt_translation
Test: dm_test_fdt_translation: test-fdt.c
Test: dm_test_fdt_translation: test-fdt.c (flat tree)
Failures: 0
Signed-off-by: Fabien Dessenne <fabien.dessenne@st.com>
In device nodes with more than one entry in the reg property,
it is sometimes useful to regmap only of the entries. Add an
API regmap_init_mem_index() to facilitate this.
Signed-off-by: Faiz Abbas <faiz_abbas@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
`if (!strncmp(dev->name, name, strlen(name)))` might find out
the wrong device, it might find out `dram_pll_ref_sel`, when name is
`dram_pll`. So use strcmp to avoid such issue.
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This add missing parts for previous commit 06f94461a9
("fdt: Allow indicating a node is for U-Boot proper only")
At present it is not possible to specify that a node should be used before
relocation (in U-Boot proper) without it also ending up in SPL and TPL
device trees. Add a new "u-boot,dm-pre-proper" boolean property for this.
Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This uclass is intended for devices that do not need any features from the
uclass, including binding children.
This will typically be used by devices that are used to bind child devices
but do not use dm_scan_fdt_dev() to do it. That is for example the case of
several USB wrappers that have 2 child devices (1 for device and 1 for
host) but bind only one at a any given time.
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
It was returning an int, which doesn't work if the u32 it is reading,
or the default value, will overflow a signed int.
While it could be made to work, when using a C standard/compiler where
casting negative signed values to unsigned has a defined behavior,
combined with careful casting, it seems obvious one is meant to use
ofnode_read_s32_default() with signed values.
Cc: Simon Glass <sjg@chromium.org>
Signed-off-by: Trent Piepho <tpiepho@impinj.com>
Add ofnode_get_addr_size_index function to fetch the address
and size of the reg space based on index.
Signed-off-by: Keerthy <j-keerthy@ti.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Update the condition to translate only if this is enabled for SPL.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Testing has shown that the current DM implementation of a platform /
board specific translation offset, as its needed for the SPL on MVEBU
platforms is buggy. The translation offset is confingured too late,
after the driver bind functions are run. This may result in incorrect
address translations. With the current implementation its not possible
to configure the offset earlier, as the DM code has not run at all.
This patch now removed the set_/get_translation_offset() calls and
moves the translation offset into the GD variable translation_offset.
This variable will get used when CONFIG_TRANSLATION_OFFSET is enabled.
This option is enabled only for MVEBU on ARM32 platforms, where its
currenty needed and configured in the SPL.
Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Pierre Bourdon <delroth@gmail.com>
Cc: Baruch Siach <baruch@tkos.co.il>
Cc: Simon Glass <sjg@chromium.org>
Cc: Heiko Schocher <hs@denx.de>
Cc: Tom Rini <trini@konsulko.com>
Tested-by: Pierre Bourdon <delroth@gmail.com>
Tested-by: Baruch Siach <baruch@tkos.co.il>
Boards such as qemu-riscv, which receive their device tree at runtime,
for example from QEMU or firmware, are unable to add the appropriate
device tree properties to make devices available pre relocation.
Instead, they must rely on the DM_FLAG_PRE_RELOC flag to be set for the
required drivers.
Add the DM_FLAG_PRE_RELOC flag to the simple-bus driver to make devices
under it with drivers that have set the flag as well available pre
relocation for these boards.
Signed-off-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
The function dm_ofnode_pre_reloc should be used instead
of the function dm_fdt_pre_reloc and avoid duplicated code.
Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
v2019.04-rc3 sandbox U-Boot fails to boot when compiled with
-fsanitize=address and linked against -lasan, reporting [1].
Git bisecting shows that the issue is contributed by v2019.01 commit
1678754f5e ("core: ofnode: Fix ofnode_get_addr_index function").
The root cause seems to be the mismatch between sizeof(u64) and
sizeof(fdt_size_t) on sandbox. Luckily, thanks to the fact that the
size argument of both of_get_address() and fdtdec_get_addr_size_fixed()
is optional, we can pass NULL in its place, avoiding the problem.
[1] Backtrace reported by ASAN (gcc 8.1.0):
$> ./u-boot -d arch/sandbox/dts/sandbox.dtb
[..]
Reviewed-by: Simon Glass <sjg@chromium.org>
=================================================================
==10998==ERROR: AddressSanitizer: stack-buffer-overflow on address 0x7ffcc2331140 at pc 0x0000004eeeb0 bp 0x7ffcc2330f80 sp 0x7ffcc2330f70
WRITE of size 8 at 0x7ffcc2331140 thread T0
#0 0x4eeeaf in of_get_address drivers/core/of_addr.c:154
#1 0x4f7441 in ofnode_get_addr_index drivers/core/ofnode.c:263
#2 0x5b2a78 in sb_eth_ofdata_to_platdata drivers/net/sandbox.c:422
#3 0x4dccd8 in device_probe drivers/core/device.c:407
#4 0x753170 in eth_initialize net/eth-uclass.c:428
#5 0x47d9bf in initr_net common/board_r.c:557
#6 0x6bcfa7 in initcall_run_list lib/initcall.c:30
#7 0x47e1fe in board_init_r common/board_r.c:859
#8 0x4060e5 in main arch/sandbox/cpu/start.c:356
#9 0x7fb8d135482f in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2082f)
#10 0x40a3a8 in _start (/path/to/u-boot/u-boot+0x40a3a8)
Address 0x7ffcc2331140 is located in stack of thread T0 at offset 32 in frame
#0 0x4f72b8 in ofnode_get_addr_index drivers/core/ofnode.c:255
This frame has 3 object(s):
[32, 36) 'size' <== Memory access at offset 32 partially overflows this variable
[96, 100) 'flags'
[160, 168) 'node'
HINT: this may be a false positive if your program uses some custom stack unwind mechanism or swapcontext
(longjmp and C++ exceptions *are* supported)
SUMMARY: AddressSanitizer: stack-buffer-overflow drivers/core/of_addr.c:154 in of_get_address
Shadow bytes around the buggy address:
0x10001845e1d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x10001845e1e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x10001845e1f0: 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1
0x10001845e200: 04 f2 f2 f2 f2 f2 f2 f2 04 f2 f2 f2 f2 f2 f2 f2
0x10001845e210: 04 f2 f2 f2 f3 f3 f3 f3 00 00 00 00 00 00 00 00
=>0x10001845e220: 00 00 00 00 f1 f1 f1 f1[04]f2 f2 f2 f2 f2 f2 f2
0x10001845e230: 04 f2 f2 f2 f2 f2 f2 f2 00 f2 f2 f2 f3 f3 f3 f3
0x10001845e240: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x10001845e250: 00 00 00 00 f1 f1 f1 f1 00 00 f2 f2 f3 f3 f3 f3
0x10001845e260: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1
0x10001845e270: f1 f1 00 f2 f2 f2 f3 f3 f3 f3 00 00 00 00 00 00
Shadow byte legend (one shadow byte represents 8 application bytes):
Addressable: 00
Partially addressable: 01 02 03 04 05 06 07
Heap left redzone: fa
Freed heap region: fd
Stack left redzone: f1
Stack mid redzone: f2
Stack right redzone: f3
Stack after return: f5
Stack use after scope: f8
Global redzone: f9
Global init order: f6
Poisoned by user: f7
Container overflow: fc
Array cookie: ac
Intra object redzone: bb
ASan internal: fe
Left alloca redzone: ca
Right alloca redzone: cb
==10998==ABORTING
'To' list:
git log --since=1year drivers/core/ofnode.c | grep "\-by: .*@" | \
sed 's/.*-by: //' | sort | uniq -c | sort -rn
10 Simon Glass <sjg@chromium.org>
3 Mario Six <mario.six@gdsys.cc>
2 Martin Fuzzey <mfuzzey@parkeon.com>
2 Marek Vasut <marek.vasut+renesas@gmail.com>
1 Tom Rini <trini@konsulko.com>
1 Masahiro Yamada <yamada.masahiro@socionext.com>
1 Keerthy <j-keerthy@ti.com>
1 Jens Wiklander <jens.wiklander@linaro.org>
1 Bin Meng <bmeng.cn@gmail.com>
Fixes: 1678754f5e ("core: ofnode: Fix ofnode_get_addr_index function")
Signed-off-by: Eugeniu Rosca <erosca@de.adit-jv.com>
Change the function syscon_regmap_lookup_by_phandle()
introduced by commit 6c3af1f24e ("syscon: dm: Add a
new method to get a regmap from DTS") to have
Linux-compatible syscon API.
Same modification than commit e151a1c288 ("syscon: add
Linux-compatible syscon API") solves issue when the node
identified by the phandle has several compatibles and is
already bound to a dedicated driver.
See Linux commit bdb0066df96e ("mfd: syscon: Decouple syscon
interface from platform devices").
Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
We can remove the pre reloc property in SPL and TPL device-tree:
- u-boot,dm-pre-reloc
- u-boot,dm-spl
- u-boot,dm-tpl
As only the needed node are kept by fdtgrep (1st pass).
The associated function (XXX_pre_reloc) are simple for SPL/TPL:
return always true.
Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
At present it is not possible to use the syscon devices for PCI devices
since a regmap is required. Since PCI uses a 3-cell address the conversion
of the 'reg' property to an address always fails. In any case, the regmap
is not useful with PCI since devices are accessed through the PCI bus
which regmap does not support.
Add a special case for PCI syscon devices, so that they don't set up a
regmap.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
While uclass_find_device() fails with -ENODEV in case of list_empty
strangely uclass_find_first_device() returns 0.
Fix uclass_find_first_device() to also fail with -ENODEV instead.
Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
It is wrapper for calling of_alias_get_highest_id() when live tree is
enabled and fdtdec_get_alias_highest_id() if not.
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
The same functionality was added to Linux for i2c bus registration with this
commit message:
"
of: base: add function to get highest id of an alias stem
I2C supports adding adapters using either a dynamic or fixed id. The
latter is provided by aliases in the DT case. To prevent id collisions
of those two types, install this function which gives us the highest
fixed id, so we can then let the dynamically created ones come after
this highest number.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
"
Add it also to U-Boot for DM I2C support.
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
At present the 'Index' column assumes there is only one digit. But on some
devices (e.g. snow) there are a lot of regulators and GPIO banks. Adjust
the output to allow for two digits without messing up the display.
Also capatalise the heading to match.
Fixes: 5197dafc42 (dm: core: Widen the dump tree to show more of the
driver's name.)
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Liviu Dudau <liviu.dudau@foss.arm.com>
+ Update the function syscon_node_to_regmap() to force bound on
syscon uclass and directly use the list of device from DM.
+ Remove the static list syscon_list.
This patch avoid issue (crash) when syscon_node_to_regmap() is called
before and after reallocation (list content is invalid).
Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
The current dev_read...() functions use s32 and u32 which are convenient
for device tree but not so useful for normal code, which often wants to
use normal integers for values.
Add a helper which supports returning an unsigned int. Also add signed
versions of the unsigned readers.
Signed-off-by: Simon Glass <sjg@chromium.org>
To reset the DM after a new dtb is loaded, we need to call dm_uninit()
and then dm_init(). This fails however because gd->dm_root is not nullified
by dm_uninit().
Fixing it by setting gd->dm_root in dm_uninit().
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heiko Schocher <hs@denx.de>
It is currently not possible to include the support to remove devices in
the SPL. This is however needed by platforms that re-select their dtb after
DM is initialized; they need to remove all the previously bound devices
before triggering a scan of the new DT.
Add a Kconfig option to be able to include the support for device removal
in the SPL.
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Seeries-changes:3
- update commit message
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
If OF_CONTROL is not enabled and DM_SEQ_ALIAS is enabled, we must
assign an alias (requested sequence number) to devices that belongs to a
class with the DM_UC_FLAG_SEQ_ALIAS flag. Otherwise
uclass_find_device_by_seq() cannot be used to get/probe a device. In
particular i2c_get_chip_for_busnum() cannot be used.
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heiko Schocher <hs@denx.de>
syscon_regmap_lookup_by_phandle() can be used to get the regmap of a syscon
device from a reference in the DTS. It operates similarly to the linux
version of the namesake function.
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This functions allow us to get and remap I/O addresses by name, which is useful when there are multiple reg addresses indexed by reg-names property.
This is needed in bmips dma/eth patch series, but can also be used on many
other drivers.
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Reviewed-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Currently the else part of ofnode_get_addr_index function
does not fetch addresses based on the index but rather just
returns the base address. Fix that.
Signed-off-by: Keerthy <j-keerthy@ti.com>
Add two functions which can find a child device by uclass or by name.
The first is useful with Multi-Function-Devices (MFDs) to find one of a
particular type. The second is useful when only the name is known.
Signed-off-by: Simon Glass <sjg@chromium.org>
This function may be useful to code outside of the code driver-model
implementation. Export it and add a test.
Signed-off-by: Simon Glass <sjg@chromium.org>
With drivers that have prefix names that are quite long (like
'versatile_') it is useful to have a wider column for the driver's
name when dumping the device driver tree.
Also update the tests to take into account the wider output format.
Signed-off-by: Liviu Dudau <liviu.dudau@foss.arm.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Similarly to uclass_first_device_err(), add uclass_next_device_err()
which returns an error if there are no next devices in that uclass.
Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Use the uclass_foreach_dev() macro instead of the open coded version.
Signed-off-by: Liviu Dudau <liviu.dudau@foss.arm.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Some buses need to set up their child devices after they are probed.
Support a common child_post_probe() method for the uclass.
With this change, the two APIs uclass_pre_probe_device() and
uclass_post_probe_device() become symmetric.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Add support for switching the endianness of regmap accesses via the
"little-endian", "big-endian", and "native-endian" boolean properties in
the device tree.
The default endianness is native endianness.
Signed-off-by: Mario Six <mario.six@gdsys.cc>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
It is useful to be able to treat the different ranges of a regmap
separately to be able to use distinct offset for them, but this is
currently not implemented in the regmap API.
To preserve backwards compatibility, add regmap_read_range and
regmap_write_range functions that take an additional parameter
'range_num' that identifies the range to operate on.
Reviewed-by: Anatolij Gustschin <agust@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Mario Six <mario.six@gdsys.cc>
The regmap functions currently assume that all register map accesses
have a data width of 32 bits, but there are maps that have different
widths.
To rectify this, implement the regmap_raw_read and regmap_raw_write
functions from the Linux kernel API that specify the width of a desired
read or write operation on a regmap.
Implement the regmap_read and regmap_write functions using these raw
functions in a backwards-compatible manner.
Reviewed-by: Anatolij Gustschin <agust@denx.de>
Signed-off-by: Mario Six <mario.six@gdsys.cc>
Reviewed-by: Simon Glass <sjg@chromium.org>
Add some debug output in cases where the initialization of a regmap
fails.
Reviewed-by: Anatolij Gustschin <agust@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Mario Six <mario.six@gdsys.cc>
Both fdtdec_get_addr_size_fixed and of_address_to_resource can fail with
an error, which is not currently checked during regmap initialization.
Since the indentation depth is already quite deep, extract a new
'init_range' method to do the initialization.
Reviewed-by: Anatolij Gustschin <agust@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Mario Six <mario.six@gdsys.cc>
A newly created property is currently not freed if a name could not be
allocated. This patch fixes the resulting memory leak in the error
patch.
Reported-by: Coverity (CID: 184085)
Fixes: e369e58df7 ("core: Add functions to set properties in live-tree")
Signed-off-by: Mario Six <mario.six@gdsys.cc>
ofnode_read_simple_addr_cells may fail and return a negative error code.
Check for this when initializing regmaps.
Also check if both_len is zero, since this is perfectly possible, and
would lead to a division-by-zero further down the line.
Reviewed-by: Anatolij Gustschin <agust@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Mario Six <mario.six@gdsys.cc>
Document the regmap_alloc() function.
Reviewed-by: Anatolij Gustschin <agust@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Mario Six <mario.six@gdsys.cc>
Commit f2006808f0: ("dm: core: parse chosen node") added a logic
to parse the chosen node during dm_scan_fdt_node(), but unfortunately
it missed adding the same logic in dm_scan_fdt_live(). This mirrors
the logic in the livetree version.
The weird thing is that commit f2006808f0 did update the test case
to test such logic, but even if I reset to that commit, the test case
still fails, and I have no idea how it could pass.
With this fix, the following 2 test cases now pass:
Test: dm_test_bus_children: bus.c
test/dm/bus.c:112, dm_test_bus_children(): num_devices ==
list_count_items(&uc->dev_head): Expected 7, got 6
Test: dm_test_fdt: test-fdt.c
test/dm/test-fdt.c:184, dm_test_fdt(): num_devices ==
list_count_items(&uc->dev_head): Expected 7, got 6
Fixes: f2006808f0 ("dm: core: parse chosen node")
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Currently the comments of several APIs (eg: dm_init_and_scan()) say:
@pre_reloc_only: If true, bind only drivers with the DM_FLAG_PRE_RELOC
flag. If false bind all drivers.
The 'Pre-Relocation Support' chapter in doc/driver-model/README.txt
documents the same that both device tree properties and driver flag
are supported.
However the implementation only checks these special device tree
properties without checking the driver flag at all. This updates
lists_bind_fdt() to consider both scenarios.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Squashed in http://patchwork.ozlabs.org/patch/996473/ :
Signed-off-by: Simon Glass <sjg@chromium.org>
This adds a new API dm_ofnode_pre_reloc(), a livetree equivalent
API of dm_fdt_pre_reloc().
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
At present it is not possible to specify that a node should be used before
relocation (in U-Boot proper) without it also ending up in SPL and TPL
device trees. Add a new "u-boot,dm-pre-proper" boolean property for this.
Signed-off-by: Simon Glass <sjg@chromium.org>
At present ofnode_read_fmap_entry() reads a flash map entry in a format
which is not supported by binman. To allow use to use binman-format
descriptions, update this function.
Also add a simple test.
Signed-off-by: Simon Glass <sjg@chromium.org>
Some devices have children and want to press an existing inactive child
into service when needed. Add a function to help with this.
Signed-off-by: Simon Glass <sjg@chromium.org>
Quite a few functions do not actually modify the device that is passed in.
Update the function signatures to reflect that.
Signed-off-by: Simon Glass <sjg@chromium.org>
There is no reason why this feature should not be supported for uclass-
private data. Update the code accordingly.
Signed-off-by: Simon Glass <sjg@chromium.org>
Of CONFIG_OF_TRANSLATE is enabled, this function still returns
untranslated bogus results. Add the missing translation.
Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Simon Glass <sjg@chromium.org>
Cc: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
The size should be decoded using of_n_size_cells(), make it so.
Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Simon Glass <sjg@chromium.org>
Cc: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Just as /chosen may contain devices /firmware may contain devices, scan
for devices under /firmware too.
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
We cannot use device structures to disable devices, since getting
them with the API functions would bind and activate the device, which
would fail if the underlying device does not exist.
Reviewed-by: Simon Glass <sjg@chromium.org>
Implement a set of functions to manipulate properties in a live device
tree:
* ofnode_write_prop() to set generic properties of a node
* ofnode_write_string() to set string properties of a node
* ofnode_set_enabled() to either enable or disable a node
Signed-off-by: Mario Six <mario.six@gdsys.cc>
Reviewed-by: Simon Glass <sjg@chromium.org>
Adds ofnode_by_prop_value() to search for nodes with a given property
and value, an ofnode version of fdt_node_offset_by_prop_value().
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
commit 30a90f56c3 ("dm: core: add functions to get memory-mapped I/O
addresses") introduced a devfdt_remap_addr_index() routine but it does
not make use of the index parameter.
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
All Linux firmware drivers are put under "/firmware" node
and it has support to populate "/firmware" node by default.
u-boot and Linux can share same DTB. In this case, driver
probe for devices under "/firmware" will not be invoked
as "/firmware" does not have its own "compatible" property.
This patch scans "/firmware" node by default like "/clocks".
Signed-off-by: Rajan Vaja <rajan.vaja@xilinx.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Create separate function for scanning node by path and
move "/clock" node scan code into that function.
This will be usable if scanning of more node is required.
Signed-off-by: Rajan Vaja <rajan.vaja@xilinx.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Also add a 'drv' parameter to filter the children to remove/unbind.
Exporting those functions is a preparatory work for the addition of the
bind/unbind commands.
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
Also add device_find_global_by_ofnode() that also find a device based on
the OF node, but doesn't probe the device.
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
Command "dm tree" dumps the devices with class, driver, name information.
Add the index of the device in the class too, because the information is
useful for the bind/unbind commands.
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This function is the reciprocal of uclass_find_device().
It will be used to print the index information in dm tree dump.
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
We don't have the live-tree version of fdtdec_get_pci_vendev().
This adds the API.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Add a way to decode a memory region, including the memory type (sram or
sdram) and its start address and size.
Signed-off-by: Simon Glass <sjg@chromium.org>
Add a new device_bind_ofnode() function which can bind a device given its
ofnode. This allows binding devices more easily with livetree nodes.
Signed-off-by: Simon Glass <sjg@chromium.org>
We have a 32-bit version of this function. Add a 64-bit version as well so
we can easily read 64-bit ints from the device tree.
Signed-off-by: Simon Glass <sjg@chromium.org>
Add the regmap_update_bits() to simply the read/modify/write of registers
in a single command. The function is taken from Linux regmap
implementation.
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
The syscon implementation in U-Boot is different from that in Linux.
Thus, DT files imported from Linux do not work for U-Boot.
In U-Boot driver model, each node is bound to a dedicated driver
that is the most compatible to it. This design gets along with the
concept of DT, and the syscon in Linux originally worked like that.
However, Linux commit bdb0066df96e ("mfd: syscon: Decouple syscon
interface from platform devices") changed the behavior because it is
useful to let a device bind to another driver, but still work as a
syscon provider.
That change had happened before U-Boot initially supported the syscon
driver by commit 6f98b7504f ("dm: Add support for generic system
controllers (syscon)"). So, the U-Boot's syscon works differently
from the beginning. I'd say this is mis-implementation given that
DT is not oriented to a particular project, but Linux is the canon
of DT in practice.
The problem typically arises in the combination of "syscon" and
"simple-mfd" compatibles.
In Linux, they are orthogonal, i.e., the order between "syscon" and
"simple-mfd" does not matter at all.
Assume the following compatible.
compatible = "foo,bar-syscon", "syscon", "simple-mfd";
In U-Boot, this device node is bound to the syscon driver
(driver/core/syscon-uclass.c) since the "syscon" is found to be the
most compatible. Then, syscon_get_regmap() succeeds.
However,
compatible = "foo,bar-syscon", "simple-mfd", "syscon";
does not work because this node is bound to the simple-bus driver
(drivers/core/simple-bus.c) in favor of "simple-mfd" compatible.
The compatible string "syscon" is just dismissed.
Moreover,
compatible = "foo,bar-syscon", "syscon";
works like the first case because the syscon driver populates the
child devices. This is wrong because populating children is the job
of "simple-mfd" (or "simple-bus").
This commit ports syscon_node_to_regmap() from Linux. This API
does not require the given node to be bound to a driver in any way.
Reported-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Currently, regmap_init_mem() takes a udevice. This requires the node
has already been associated with a device. It prevents syscon/regmap
from behaving like those in Linux.
Change the first argumenet to take a device node.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
device_is_compatible() takes udevice, but there is no such a helper
that takes ofnode.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Putting zero length array at the end of struct is a common technique
to embed arbitrary length of members. There is no good reason to let
regmap_alloc_count() branch by "if (count <= 1)".
As far as I understood the code, regmap->base is an alias of
regmap->ranges[0].start, but it is not helpful but make the code
just ugly.
Rename regmap_alloc_count() to regmap_alloc() because the _count
suffix seems pointless.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
[trini: fixup cpu_info-rcar.c]
Signed-off-by: Tom Rini <trini@konsulko.com>
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from. So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry. Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.
In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.
This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents. There's also a few places where I found we did not have a tag
and have introduced one.
Signed-off-by: Tom Rini <trini@konsulko.com>
Commit 286ede6 ("drivers: core: Add translation in live tree case") made
dev_get_addr always use proper bus translations for addresses read from
the device tree. But this leads to problems with certain busses, e.g.
I2C busses, which run into an error during translation, and hence stop
working.
It turns out that of_translate_address() and fdt_translate_address()
stop the address translation with an error when they're asked to
translate addresses for busses where #size-cells == 0 (comment from
drivers/core/of_addr.c):
* Note: We consider that crossing any level with #size-cells == 0 to mean
* that translation is impossible (that is we are not dealing with a value
* that can be mapped to a cpu physical address). This is not really specified
* that way, but this is traditionally the way IBM at least do things
To fix this case, we check in both the live-tree and non-live tree-case,
whether the bus of the device whose address is about to be translated
has size-cell size zero. If this is the case, we just read the address
as a plain integer and return it, and only apply bus translations if the
size-cell size if greater than zero.
Signed-off-by: Mario Six <mario.six@gdsys.cc>
Signed-off-by: Martin Fuzzey <mfuzzey@parkeon.com>
Reported-by: Martin Fuzzey <mfuzzey@parkeon.com>
Fixes: 286ede6 ("drivers: core: Add translation in live tree case")
Reviewed-by: Simon Glass <sjg@chromium.org>
dm_scan_fdt_node can't work when live dt is active,
we should use dm_scan_fdt_live instead.
Signed-off-by: Andy Yan <andy.yan@rock-chips.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Add api for who can not get phandle from a device property.
Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Thomas reported U-Boot failed to build host tools if libfdt-devel
package is installed because tools include libfdt headers from
/usr/include/ instead of using internal ones.
This commit moves the header code:
include/libfdt.h -> include/linux/libfdt.h
include/libfdt_env.h -> include/linux/libfdt_env.h
and replaces include directives:
#include <libfdt.h> -> #include <linux/libfdt.h>
#include <libfdt_env.h> -> #include <linux/libfdt_env.h>
Reported-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
We need to get ofnode from a phandle, add interface to support
both live dt and fdt.
Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Tested-by: Klaus Goger <klaus.goger@theobroma-systems.com>
Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
The Rockchip video drivers need to walk the ofnode-parrents to find
an enclosing device that has a UCLASS_DISPLAY driver bound. This
adds a ofnode_get_parent()-function that returns the parent-node.
Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Tested-by: Klaus Goger <klaus.goger@theobroma-systems.com>
Reviewed-by: Anatolij Gustschin <agust@denx.de>
Each uclass has a driver name which we can use to look up the uclass. This
is useful for logging, where the uclass ID is used as the category.
Add a function to handle this, as well as a test.
Signed-off-by: Simon Glass <sjg@chromium.org>
Linux uses the properties 'assigned-clocks', 'assigned-clock-parents'
and 'assigned-clock-rates' to configure the clock subsystem for use
with various peripheral nodes.
This implements clk_set_defaults() and hooks it up with the general
device probibin in drivers/core/device.c: when a new device is probed,
clk_set_defaults() will be called for it and will process the
properties mentioned above.
Note that this functionality is designed to fail gracefully (i.e. if a
clock-driver does not implement set_parent(), we simply accept this
and ignore the error) as not to break existing board-support.
Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Tested-by: David Wu <david.wu@rock-chips.com>
Series-changes: 2
- Fixed David's email address.
Series-version: 2
Cover-letter:
clk: support assigned-clock, assigned-clock-parents, assigned-clock-rates
For various peripherals on Rockchip SoCs (e.g. for the Ethernet GMAC),
the parent-clock needs to be set via the DTS. This adds the required
plumbing and implements the GMAC case for the RK3399.
END
dev_read_u32_default() always returns something even when the property
is missing. So, it is impossible to do nothing in the case. One
solution is to use ofnode_read_u32() instead, but adding dev_read_u32()
will be helpful.
BTW, Linux has an equvalent function, device_property_read_u32();
it is clearer that it reads a property. I cannot understand the
behavior of dev_read_u32() from its name.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Judging from its name and parameters, device_is_compatible looks like it
is compatible with a live device tree, but it actually isn't.
Make it compatible with a live device tree.
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Mario Six <mario.six@gdsys.cc>
There are some whitespace-related style violations in read.c; fix those.
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Mario Six <mario.six@gdsys.cc>
The function dev_read_addr calls ofnode_get_addr_index in the live tree
case, which does not apply bus translations to the address read from the
device tree. This results in illegal addresses on boards that rely on
bus translations being applied.
Fix this situation by applying bus translations in the live tree case as
well.
Signed-off-by: Mario Six <mario.six@gdsys.cc>
Tested-by: Stephen Warren <swarren@nvidia.com>
This currently causes a warning in sandbox and will not do the right
thing:
drivers/core/read.c: In function ‘dev_read_addr_ptr’:
drivers/core/read.c:64:44: warning: cast to pointer from integer of
different size [-Wint-to-pointer-cast]
return (addr == FDT_ADDR_T_NONE) ? NULL : (void *)addr;
Use map_sysmem() which is the correct way to convert an address to a
pointer.
Fixes: c131c8bca8 (dm: core: add dev_read_addr_ptr())
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
The livetree codepath of ofnode_get_addr_size always used the "reg"
property for of_get_property. Use the property parameter of the function
call instead and check the return value if the property exists.
Otherwise return FDT_ADDR_T_NONE.
This was discoverd while using SPI NOR with livetree.
spi_flash_decode_fdt checks for memory-map and will not fail with
livetree even if the property does not exist.
Signed-off-by: Klaus Goger <klaus.goger@theobroma-systems.com>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
The size variable may not be always be a mulitple of
ARCH_DMA_MINALIGN and using it to flush cache leads to cache
misaligned warnings.
Therefore, round up the size to a multiple of ARCH_DMA_MINLAIGN
when allocating private data.
Signed-off-by: Faiz Abbas <faiz_abbas@ti.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
As we discussed before in ML, dm_dbg() causes undefined reference
error if #define DEBUG is added to users, but not drivers/core/util.c
We do not need this macro because we can use pr_debug() instead, and
it is pretty easy to enable it for the DM core by using ccflags-y.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
dev_read_string_count() is used to get the number of strings in a
stringlist.
dev_read_string_index() is used to get a string in the stringlist based on
its position in the list.
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
The dev_read_addr_ptr() mimics the behaviour of the devfdt_get_addr_ptr(),
retrieving the first address of the node's reg-property and returning
it as a pointer (or NULL on failure).
Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Acked-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
When using 32-bit addresses dtoc works correctly. For 64-bit addresses it
does not since it ignores the #address-cells and #size-cells properties.
Update the tool to use fdt64_t as the element type for reg properties when
either the address or size is larger than one cell. Use the correct value
so that C code can obtain the information from the device tree easily.
Alos create a new type, fdt_val_t, which is defined to either fdt32_t or
fdt64_t depending on the word size of the machine. This type corresponds
to fdt_addr_t and fdt_size_t. Unfortunately we cannot just use those types
since they are defined to phys_addr_t and phys_size_t which use
'unsigned long' in the 32-bit case, rather than 'unsigned int'.
Add tests for the four combinations of address and size values (32/32,
64/64, 32/64, 64/32). Also update existing uses for rk3399 and rk3368
which now need to use the new fdt_val_t type.
Signed-off-by: Simon Glass <sjg@chromium.org>
Suggested-by: Heiko Stuebner <heiko@sntech.de>
Reported-by: Kever Yang <kever.yang@rock-chips.com>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Tested-by: Kever Yang <kever.yang@rock-chips.com>
Currently, all fixed-clock declared in "clocks" node in device tree
can be binded by clk_fixed_rate.c driver only if each of them have
the "simple-bus" compatible string.
This constraint has been invoked here [1].
This patch offers a solution to avoid adding "simple-bus" compatible
string to nodes that are not busses.
[1] https://patchwork.ozlabs.org/patch/558837/
Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Add a convenience macro to iterate over subnodes of a node. Make use of
this where appropriate in the code.
Signed-off-by: Simon Glass <sjg@chromium.org>
We can use printf() to limit the string width. Adjust the code to do this
instead of using strlcpy() which is a bit clumbsy.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
Linux supports platform_get_resource_byname() to look up a resource
by name.
We want a similar helper. It is useful when a device node has named
register regions.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
We cannot call dm_scan_fdt_dev() with of-platdata since there is no device
tree. Fix this with an #if check.
Fixes: 3be9a37 (dm: syscon: scan sub-nodes of the syscon node)
Signed-off-by: Simon Glass <sjg@chromium.org>
This change introduces TPL variants of the REGMAP and SYSCON config
options (i.e. TPL_REGMAP and TPL_SYSCON in analogy to SPL_REGMAP and
SPL_SYSCON) in preparation of a finer-grained feature selection for
building feature-rich TPL variants.
Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
SPL_REGMAP and SPL_SYSCON were marked as depending on DM, when a
stricter dependency of SPL_DM was possible. This commit makes the
prereq more specific.
Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
This function is usefull to get phandle number contained
in a property list.
For example, this allows to allocate the right amount
of memory to keep clock's reference contained into the
"clocks" property.
To implement it, either of_count_phandle_with_args() or
fdtdec_parse_phandle_with_args() are used respectively
for live tree and flat tree.
By passing index = -1, these 2 functions returns the
number of phandle contained into the property list.
Add also the dev_count_phandle_with_args() based on
ofnode_count_phandle_with_args()
Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
At present this function only supports 32-bit (single-cell) values. Update
it to support two-cell values also.
Signed-off-by: Simon Glass <sjg@chromium.org>
Tested-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Tested-on: Beaver, Jetson-TK1
Tested-by: Stephen Warren <swarren@nvidia.com>
We sometimes need to read a resource from an arbitrary node. In any case
for consistency we should not put the live-tree switching code in
a dev_read_...() function. Update this to suit.
Signed-off-by: Simon Glass <sjg@chromium.org>
Tested-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Tested-on: Beaver, Jetson-TK1
Tested-by: Stephen Warren <swarren@nvidia.com>
DT property values can be strings as well as integers. This is why
of_get_property/fdt_getprop returns an opaque pointer.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Simon Glass <sjg@chromium.org>
Some platforms have very limited SRAM to run SPL code, so there may
not be the same amount space for a malloc pool before relocation in
the SPL stage as the normal U-Boot stage.
Make SPL and (the full) U-Boot stage use independent SYS_MALLOC_F_LEN,
so the size of pre-relocation malloc pool can be configured memory
space independently.
Signed-off-by: Andy Yan <andy.yan@rock-chips.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Acked-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
[fixed up commit-message:]
Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
DTB is encoded in big endian. When we retrieve property values,
we need to use fdt32_to_cpu (aka be32_to_cpu) for endian conversion.
This is a bit error-prone, but sparse is useful to detect endian
mismatch.
We need to use (fdt32_t *) instead of (u32 *) for a pointer of a
property value. Otherwise sparse warns "cast to restricted __be32".
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Include <dm/util.h> to fix sparse warnings:
symbol 'dm_dump_all' was not declared. Should it be static?
symbol 'dm_dump_uclass' was not declared. Should it be static?
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>
Reuse ofnode_get_property() to simplify the implementation.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Simon Glass <sjg@chromium.org>
This function returns the pointer to the value of a node property.
The current name ofnode_read_prop() is confusing. Follow the naming
of_get_property() from Linux.
The return type (const u32 *) is wrong. DT property values can be
strings as well as integers. This is why of_get_property/fdt_getprop
returns an opaque pointer.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Simon Glass <sjg@chromium.org>
The code inside the if-block is the same as of_get_property().
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Simon Glass <sjg@chromium.org>
Fix sparse warnings "... was not declared. Should it be static?"
Also, fix redefinition of dm_warn/dm_dbg.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
The of_n_addr_cells() and of_n_size_cells() functions are useful for
getting the size of addresses in a node, but in a few places U-Boot needs
to obtain the actual property value for a node without walking up the
stack. Add functions for this and just the existing code to use it.
Add a comment to the existing ofnode functions which do not do the right
thing with a flat tree.
This fixes a problem reading PCI addresses.
Signed-off-by: Simon Glass <sjg@chromium.org>
Tested-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Tested-on: Beaver, Jetson-TK1
This function allows a device's status to be read. This indicates whether
the device should be enabled or disabled.
Note: In normal operation disabled devices will not be present in the
driver-model tree.
Signed-off-by: Simon Glass <sjg@chromium.org>
Tested-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Tested-on: Beaver, Jetson-TK1
Add a function which reads resources from a device, such as the device
hardware address. This uses the "reg" property in the device.
Unlike other functions there is little sense in inlining this when
livetree is not being used because it has some logic in it and this would
just bloat the code size.
Signed-off-by: Simon Glass <sjg@chromium.org>
Tested-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Tested-on: Beaver, Jetson-TK1
This provides a way to find the number of strings in a string list. Add it
and also fix up the comment for ofnode_read_string_index().
Signed-off-by: Simon Glass <sjg@chromium.org>
Tested-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Tested-on: Beaver, Jetson-TK1
Sometimes it is useful to iterate through all devices in a uclass and
skip over those which do not work correctly (e.g fail to probe). Add two
new functions to provide this feature.
The caller must check the return value each time to make sure that the
device is valid. But the device pointer is always returned.
Signed-off-by: Simon Glass <sjg@chromium.org>
Add some definitions and helpers for livetree in the main of.h header
file. These include:
- reading multi-cell integers
- default number of address/size cells
- functions for comparing names
Signed-off-by: Simon Glass <sjg@chromium.org>
These two functions have an of_ prefix which conflicts with naming used
in of_addr. Rename them:
fdt_read_number
fdt_support_bus_default_count_cells
Signed-off-by: Simon Glass <sjg@chromium.org>
When starting up driver model with a live tree we need to scan the tree
for devices. Add code to handle this.
Signed-off-by: Simon Glass <sjg@chromium.org>
Adjust this function to us an ofnode instead of an offset, so it can be
used with livetree. This involves updating all callers.
Signed-off-by: Simon Glass <sjg@chromium.org>
Adjust this function to use an ofnode instead of an offset, so it can be
used with livetree. This involves updating all callers.
Signed-off-by: Simon Glass <sjg@chromium.org>
When a live tree is being used we need to record the node that was used to
create the device. Update device_bind_with_driver_data() to support this.
Signed-off-by: Simon Glass <sjg@chromium.org>
When the live tree is supported some functions need to change a little.
Add an implementation which is used when not inlining these functions.
Signed-off-by: Simon Glass <sjg@chromium.org>
It is common to read a device-tree property from the node associated with
a device. Add convenience functions to do this so that drivers do not need
to deal with accessing the ofnode from the device.
These functions all start with 'dev_read_' to provide consistent naming
for all functions which read information from a device's device tree node.
These are inlined when using the flat DT to save code size. The live tree
implementation is added in a later commit.
Signed-off-by: Simon Glass <sjg@chromium.org>
Some functions deal with structured data rather than simple data types.
It makes sense to have these in their own file. For now this just has a
function to read a flashmap entry. Move the data types also.
Signed-off-by: Simon Glass <sjg@chromium.org>
Add functions to access addresses in the device tree. These are brought
in from Linux 4.10.
Also fix up the header guard for fdtaddr.h to avoid confusion.
Signed-off-by: Simon Glass <sjg@chromium.org>
Since U-Boot supports both a live tree and a flat tree, we need an easy
way to access the tree without worrying about which is currently active.
To support this, U-Boot has the concept of an ofnode, which can refer
either to a live tree node or a flat tree node.
For the live tree, the reference contains a pointer to the node (struct
device_node *) or NULL if the node is invalid. For the flat tree, the
reference contains the node offset or -1 if the node is invalid.
Add a basic set of operations using ofnodes. These are implemented by
using either libfdt functions (in the case of a flat DT reference) or
the live-tree of_...() functions.
Note that it is not possible to have both live and flat references active
at the same time. As soon as the live tree is available, everything in
U-Boot should switch to using that. This avoids confusion and allows us to
assume that the type of a reference is simply based on whether we have a
live tree yet, or not.
Signed-off-by: Simon Glass <sjg@chromium.org>
The of_ prefix conflicts with the livetree version of this function.
Rename it to avoid problems when we add livetree support.
Signed-off-by: Simon Glass <sjg@chromium.org>
Add a basic assortment of functions to access the live device tree. These
come from Linux v4.9 and are modified for U-Boot to the minimum extent
possible. While these functions are now very stable in Linux, it will be
possible to merge in fixes if needed.
Signed-off-by: Simon Glass <sjg@chromium.org>
This core function will need to work with a live tree also. Update it to
accept an ofnode instead of an offset.
Signed-off-by: Simon Glass <sjg@chromium.org>
With live tree we need a struct device_node * to reference a node. With
the existing flat tree, we need an int offset. We need to unify these into
a single value which can represent both.
Add an ofnode union for this and adjust existing code to move to this.
Signed-off-by: Simon Glass <sjg@chromium.org>
At present devices use a simple integer offset to record the device tree
node associated with the device. In preparation for supporting a live
device tree, which uses a node pointer instead, refactor existing code to
access this field through an inline function.
Signed-off-by: Simon Glass <sjg@chromium.org>
This function is only used in one place. It is better to just declare it
internally since there is a simpler replacement for use outside the
driver-model core code.
Signed-off-by: Simon Glass <sjg@chromium.org>
These support the flat device tree. We want to use the dev_read_..()
prefix for functions that support both flat tree and live tree. So rename
the existing functions to avoid confusion.
In the end we will have:
1. dev_read_addr...() - works on devices, supports flat/live tree
2. devfdt_get_addr...() - current functions, flat tree only
3. of_get_address() etc. - new functions, live tree only
All drivers will be written to use 1. That function will in turn call
either 2 or 3 depending on whether the flat or live tree is in use.
Note this involves changing some dead code - the imx_lpi2c.c file.
Signed-off-by: Simon Glass <sjg@chromium.org>
Move this group of address-related functions into a new file. These use
the flat device tree. Future work will provide new versions of these which
can support the live tree.
Signed-off-by: Simon Glass <sjg@chromium.org>
This new flag can be added to DM device drivers, which need to do some
final configuration before U-Boot exits and the OS (e.g. Linux) is
started. The remove functions of those drivers will get called at
this stage to do these last-stage configuration steps.
Signed-off-by: Stefan Roese <sr@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Cc: Bin Meng <bmeng.cn@gmail.com>
There is a strange interaction with drivers which use DMA if the cache
starts off in a dirty state. Buffer space which the driver reads (but has
not previously written) can contain zero bytes from alloc_priv(). This can
cause corruption of the memory used by DMA for incoming data.
Fix this and add a comment to explain the problem.
This allows the dwc2 driver to work correctly with driver model, for
example.
Signed-off-by: Simon Glass <sjg@chromium.org>
uclass_find_device_by_seq() prints seq and req_seq when debugging is
enabled, but this information is not very useful by itself. Add the
name of he driver to this information. This improves debugging as it
shows which devices are being considered.
Signed-off-by: Alexandru Gagniuc <alex.g@adaptrum.com>
Acked-by: Simon Glass <sjg@chromium.org>
Since TPL often needs to be very very small it may not make sense to
enable driver model. Add an option for this.
This changes brings the 'rock' board under the TPL limit with gcc 4.9.
Signed-off-by: Simon Glass <sjg@chromium.org>
The new function dm_remove_devices_flags() is intented for driver specific
last-stage cleanup operations before the OS is started. This patch adds
this functionality and hooks it into the common device_remove()
function.
Drivers wanting to use this feature for some last-stage removal calls,
need to add one of the DM_REMOVE_xx flags to their driver .flags.
Signed-off-by: Stefan Roese <sr@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
This patch adds the flags parameter to device_remove() and changes all
calls to this function to provide the default value of DM_REMOVE_NORMAL
for "normal" device removal.
This is in preparation for the driver specific pre-OS (e.g. DMA
cancelling) remove support.
Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Simon Glass <sjg@chromium.org>
Acked-by: Simon Glass <sjg@chromium.org>
In the DTS, the addresses are defined relative to the parent bus. We need
to translate them to get the address as seen by the CPU core.
Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
commit 2f11cd9121 ("dm: core: Handle global_data moving in SPL")
handles relocation of GD in SPL if spl_init() is called before
board_init_r(). So, uclass_root.next need not be initialized always
and accessing uclass_root.next->prev gives an abort. Update the
uclass_root only if it is available.
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Documentation says that we're returning true/false, not 1/0 so adapt
the function to return actual booleans.
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Simon Glass <sjg@chromium.org>
Right now the u-boot,dm-pre-reloc flag will make each marked node
always appear in both spl and tpl. But systems needing an additional
tpl might have special constraints for each, like the spl needing to
be very tiny.
So introduce two additional flags to mark nodes for only spl or tpl
environments and introduce a function dm_fdt_pre_reloc to automate
the necessary checks in code instances checking for pre-relocation
flags.
The behaviour of the original flag stays untouched and still marks
a node for both spl and tpl.
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Tested-by: Kever Yang <kever.yang@rock-chips.com>
Just do nothing in post_bind if of-platdata enabled,
for there is no dm_scan_fdt_dev().
Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Fixed subject line typo:
Signed-off-by: Simon Glass <sjg@chromium.org>
At present devices use a simple integer offset to record the device tree
node associated with the device. In preparation for supporting a live
device tree, which uses a node pointer instead, refactor existing code to
access this field through an inline function.
Signed-off-by: Simon Glass <sjg@chromium.org>
The currently available functions accessing the 'reg' property of a
device only retrieve the address. Sometimes its also necessary to
retrieve the size described by the 'reg' property. This patch adds
the new function dev_get_addr_size_index() which retrieves both,
the address and the size described by the 'reg' property.
Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Simon Glass <sjg@chromium.org>
Acked-by: Simon Glass <sjg@chromium.org>
When CONFIG_SPL_STACK_R is enabled, and spl_init() is called before
board_init_r(), spl_relocate_stack_gd() will move global_data to a new
place in memory. This affects driver model since it uses a list for the
uclasses. Unless this is updated the list will become invalid. When
looking for a non-existent uclass, such as when adding a new one, the loop
in uclass_find() may continue forever, thus causing a hang.
Add a function to correct this rather obscure bug.
Signed-off-by: Simon Glass <sjg@chromium.org>
Commit b02e4044ff ("libfdt: Bring in upstream stringlist
functions") broke codying style in some places especially
by inserting an extra whitespace before fdt_stringlist_count().
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Simon Glass <sjg@chromium.org>
These have now landed upstream. The naming is different and in one case the
function signature has changed. Update the code to match.
This applies the following upstream commits by
Thierry Reding <treding@nvidia.com> :
604e61e fdt: Add functions to retrieve strings
8702bd1 fdt: Add a function to get the index of a string
2218387 fdt: Add a function to count strings
Signed-off-by: Simon Glass <sjg@chromium.org>
It is useful in debug() statements to display the name of the uclass for a
device. Add a simple function to provide this.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Provide a trivial syscon driver matching the generic "syscon" compatible
string, allowing for simple system controllers to be used without a
custom driver just as in Linux.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Device model drivers have previously been matched to FDT nodes by virtue
of being the first driver in the driver list to be compatible with the
node. This ignores the fact that compatible strings in the device tree
are listed in order of priority - that is, if we have a node with 2
compatible strings & a driver that matches each then we should always
probe the driver that matches the first compatible string.
Fix this by looping through the compatible strings for a node when
attempting to bind it in lists_bind_fdt and checking each driver for
a match of the first string, then each driver for a match of the second
string etc. Effectively this inverts the loops over compatible strings &
drivers.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
The regmap_read & regmap_write functions were previously declared in
regmap.h but not implemented anywhere. The regmap implementation &
commit message of 6f98b7504f ("dm: Add support for register maps
(regmap)") indicate that only memory mapped accesses are supported for
now, so providing simple implementations of regmap_read & regmap_write
is trivial. The access size is presumed to be 4 bytes & endianness is
presumed native, which are the defaults for the regmap code in Linux.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Some code may want to read reg values from DT, but from nodes that aren't
associated with DM devices, so using dev_get_addr_index() isn't
appropriate. In this case, fdtdec_get_addr_size_*() are the functions to
use. However, "translation" (via the chain of ranges properties in parent
nodes) may still be desirable. Add a function parameter to request that,
and implement it. Update all call sites to default to the original
behaviour.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Squashed in build fix from Stephen:
Signed-off-by: Simon Glass <sjg@chromium.org>
We currently use dm_scan_fdt_node() to bind devices. It is an internal
function and it requires the caller to know whether we are pre- or post-
relocation.
This requirement has become quite common in drivers, so the current function
is not ideal.
Add a new function with fewer arguments, that does not require internal
headers. This can be used directly as a post_bind() method if needed.
Signed-off-by: Simon Glass <sjg@chromium.org>
Some SoCs have a single clock device. Provide a way to find it given its
driver name. This is handled by the linker so will fail if the name is not
found, avoiding strange errors when names change and do not match. It is
also faster than a string comparison.
Signed-off-by: Simon Glass <sjg@chromium.org>
Add an implementation of this function which mirrors the functions of the
automatic device-tree implementation. This can be used with of-platdata to
create regmaps.
Signed-off-by: Simon Glass <sjg@chromium.org>
We plan to add a new way of creating a regmap for of-platdata. Move the
allocation code into a separate function so that it can be shared.
Signed-off-by: Simon Glass <sjg@chromium.org>
Devices which use of-platdata have their own platdata. However, in many
cases the driver will have its own auto-alloced platdata, for use with the
device tree. The ofdata_to_platdata() method converts the device tree
settings to platdata.
With of-platdata we would not normally allocate the platdata since it is
provided by the U_BOOT_DEVICE() declaration. However this is inconvenient
since the of-platdata struct is closely tied to the device tree properties.
It is unlikely to exactly match the platdata needed by the driver.
In fact a useful approach is to declare platdata in the driver like this:
struct r3288_mmc_platdata {
struct dtd_rockchip_rk3288_dw_mshc of_platdata;
/* the 'normal' fields go here */
};
In this case we have dt_platadata available, but the normal fields are not
present, since ofdata_to_platdata() is never called. In fact driver model
doesn't allocate any space for the 'normal' fields, since it sees that there
is already platform data attached to the device.
To make this easier, adjust driver model to allocate the full size of the
struct (i.e. platdata_auto_alloc_size from the driver) and copy in the
of-platdata. This means that when the driver's bind() method is called,
the of-platdata will be present, followed by zero bytes for the empty
'normal field' portion.
A new DM_FLAG_OF_PLATDATA flag is available that indicates that the platdata
came from of-platdata. When the allocation/copy happens, the
DM_FLAG_ALLOC_PDATA flag will be set as well. The dtoc tool is updated to
output the platdata_size field, since U-Boot has no other way of knowing
the size of the of-platdata struct.
Signed-off-by: Simon Glass <sjg@chromium.org>
Provide a new function which can cope with obtaining information from
of-platdata instead of the device tree.
Signed-off-by: Simon Glass <sjg@chromium.org>
When CONFIG_SPL_OF_PLATDATA is enabled we should not access the device
tree. Remove all references to this in the core driver-model code.
Signed-off-by: Simon Glass <sjg@chromium.org>
This API helps to map physical register addresss pace of device to
virtual address space easily. Its just a wrapper around map_physmem()
with MAP_NOCACHE flag.
Signed-off-by: Vignesh R <vigneshr@ti.com>
Suggested-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Jagan Teki <jteki@openedev.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Jagan Teki <jteki@openedev.com>
Some architectures as m68k still need to use CONFIG_NEEDS_MANUAL_RELOC,
and are not still using the device tree.
Signed-off-by: Angelo Dureghello <angelo@sysam.it>
Acked-by: Simon Glass <sjg@chromium.org>
This will allow a driver's bind function to use the driver data. One
example is the Tegra186 GPIO driver, which instantiates child devices
for each of its GPIO ports, yet supports two different HW instances each
with a different set of ports, and identified by the udevice_id .data
field.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Simon Glass <sjg@chromium.org>
Support ISA busses in much the same way as Linux does. This allows for
ISA bus addresses to be translated, and only if CONFIG_OF_ISA_BUS is
selected in order to avoid including the code in builds which won't need
it.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Provide an api to check whether the given device or machine is
compatible with the given compat string which helps in making
decisions in drivers based on device or machine compatible.
Idea taken from Linux.
Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com>
Reviewed-by: Joe Hershberger <joe.hershberger@ni.com>
Some devices have a name that is stored in allocated memory. At present
there is no mechanism to free this memory when the device is unbound.
Add a device flag to track whether a name is allocated and a function to
add the flag. Free the memory when the device is unbound.
Signed-off-by: Simon Glass <sjg@chromium.org>
Use the device's own DT offset, not the device's parent's.
Fixes: 43c4d44e33 ("fdt: implement dev_get_addr_name()")
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Simon Glass <sjg@chromium.org>
In some cases, drivers may not want to bind to a device. Allow bind() to
return -ENODEV in this case, and don't treat this as an error. This can
be useful in situations where some information source other than the DT
node's main status property indicates whether the device should be
enabled, for example other DT properties might indicate this, or the
driver might query non-DT sources such as system fuses or a version number
register.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
On some platforms (e.g. x86), the return value of dev_get_addr() can't
be assigned to a pointer type variable directly. As there might be a
difference between the size of fdt_addr_t and the pointer type. On
x86 for example, "fdt_addr_t" is 64bit but "void *" only 32bit. So
assigning the register base directly in dev_get_addr() results in this
compilation warning:
warning: cast to pointer from integer of different size
This patch introduces the new function dev_get_addr_ptr() that
returns a pointer to the 'reg' address that can be used by drivers
in this case.
Signed-off-by: Stefan Roese <sr@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This function parses the reg property based on an index found in the
reg-names property. This is required for bindings that are written
using reg-names rather than hard-coding indices in reg.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Simon Glass <sjg@chromium.org>
Fix multi-line comment indentation in device_bind()
Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
We may have pinmux settings for pinctrl device, like the following
example:
"
&iomuxc {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_hog_1>;
imx6ul-evk {
pinctrl_hog_1: hoggrp-1 {
fsl,pins = <
MX6UL_PAD_UART1_RTS_B__GPIO1_IO19 0x17059 /* SD1 CD */
MX6UL_PAD_GPIO1_IO05__USDHC1_VSELECT 0x17059 /* SD1 VSELECT */
MX6UL_PAD_GPIO1_IO09__GPIO1_IO09 0x17059 /* SD1 RESET */
MX6UL_PAD_SNVS_TAMPER0__GPIO5_IO00 0x80000000
>;
};
[......]
};
"
We should not only select pinctrl state for non pinctrl devices, we
need also to handle pin mux settings such as pinctrl_log for pinctrl
devices.
So at the end of probing process of pinctrl device, select the default
state of pinctrl device.
Signed-off-by: Peng Fan <van.freenix@gmail.com>
Cc: Simon Glass <sjg@chromium.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Masahiro Yamada <yamada.masahiro@socionext.com>
If the device cannot be probed, syscon_get_by_driver_data() will still
return a useful value in its devp parameter. Ensure that it returns NULL
instead.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Simple MFD devices can bind children without special bus configuration.
Like Linux, let's handle "simple-mfd" in the same way as "simple-bus".
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Simon Glass <sjg@chromium.org>
A common pattern is to call uclass_first_device() and then check if it
actually returns a device. Add a new function which does this, returning
an error if there are no devices in that uclass.
Signed-off-by: Simon Glass <sjg@chromium.org>
This function is not used as the use case for it did not eventuate. Remove
it to avoid confusion.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
We have a way to find a regmap by its syscon driver data value. Add the same
for syscon itself.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This is often -96 (-EPFNOSUPPORT) which indicates that the uclass is not
compiled in. Display the error number to make this easier to spot.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
It is sometimes useful to be able to find a device before probing it,
perhaps to set up some platform data for it. Allow finding by of_offset
also.
Signed-off-by: Simon Glass <sjg@chromium.org>
There is sort-of race condition when a pinctrl device is probed. The pinctrl
function is called which may end up using the same device as is being
probed. This results in operations being used before the device is actually
probed.
For now, disallow pinctrl operations on pinctrl devices while probing. An
alternative solution would be to move the operation to later in the
device_probe() function (for pinctrl devices only) but this needs more
thought.
Signed-off-by: Simon Glass <sjg@chromium.org>
At present the uclass's post_bind() method is called before the driver's
bind() method. This means that the uclass cannot use any of the information
set up by the driver. Move it later in the sequence to permit this.
This is an ordering change which is always fairly major in nature. The main
impact is that devices which have children will not see them appear in their
bind() method. From what I can see, existing drivers do not look at their
children in the bind() method, so this should be safe.
Conceptually this change seems to result in a 'more correct' ordering, since
the uclass (which is broader than the device) gets the last word.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
This function cannot be used unless support is enabled for device tree
control. Adjust the code to reflect that.
Signed-off-by: Simon Glass <sjg@chromium.org>
Add new api to get device address based on index.
Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com>
Acked-by: Jagan Teki <jteki@openedev.com>
[Rebased on master]
Signed-off-by: Jagan Teki <jteki@openedev.com>
The Device Model sequence alias feature is required by some Uclasses.
Instead of disabling the feature for all SPL targets allow it to be
configured.
The config option is disabled by default to reduce code size for targets
that are not interested or do not require this feature.
Signed-off-by: Nathan Rossi <nathan@nathanrossi.com>
Acked-by: Simon Glass <sjg@chromium.org>
Acked-by: Michal Simek <michal.simek@xilinx.com>
Cc: Simon Glass <sjg@chromium.org>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Cc: Marek Vasut <marex@denx.de>
Cc: Michal Simek <michal.simek@xilinx.com>
Cc: Stefan Roese <sr@denx.de>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Some platforms need to ability to configure an offset to the standard
addresses extracted from the device-tree. This patch allows this by
adding a function to DM to configure this offset (if needed).
Signed-off-by: Stefan Roese <sr@denx.de>
Acked-by: Simon Glass <sjg@chromium.org>
Cc: Simon Glass <sjg@chromium.org>
Fixed space before tab:
Signed-off-by: Simon Glass <sjg@chromium.org>
Add a remark about SPL to this Kconfig option. Otherwise its identitcal
to the non-SPL version, which is confusing.
Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Simon Glass <sjg@chromium.org>
Acked-by: Simon Glass <sjg@chromium.org>
Acked-by: Michal Simek <michal.simek@xilinx.com>
This option is needed for all SoCs which have nodes on bus. Without
enabling this drivers are not found and probed.
Issue was found on Zynq MMC probe.
Enable this option by default.
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Stefan Roese <sr@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Add SPL Kconfig for REGMAP and SYSCON, so REGMAP and SYSCON can
remove from SPL stage.
Signed-off-by: Lin Huang <hl@rock-chips.com>
Acked-by: Simon Glass <sjg@chromium.org>
Patches:
"dm: core: Add a post_bind method for parents"
(sha1: 0118ce7957)
"dm: core: Add a uclass pre_probe() method for devices"
(sha1: 02c07b3741)
"dm: core: Allow the uclass to set up a device's child after binding"
(sha1: 081f2fcbd9)
"dm: core: Allow uclass to set up a device's child before it is probed"
(sha1: 83c7e434c9)
Adds new entries to struct driver and struct uclass_driver without
extending code for manual relocation. This patch fixes it for all
architectures which requires MANUAL_RELOC.
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Acked-by: Simon Glass <sjg@chromium.org>
dev->uclass->uc_drv->per_device_auto_alloc_size is to be freed in
device_free(), so is dev->seq. Remove these unnecessary codes.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>
The current name is inconsistent with other driver model data access
functions. Rename it and fix up all users.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Joe Hershberger <joe.hershberger@ni.com>
The current "simple" address translation simple_bus_translate() is not
working on some platforms (e.g. MVEBU). As here more complex "ranges"
properties are used in many nodes (multiple tuples etc). This patch
enables the optional use of the common fdt_translate_address() function
which handles this translation correctly.
Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Simon Glass <sjg@chromium.org>
Cc: Bin Meng <bmeng.cn@gmail.com>
Cc: Marek Vasut <marex@denx.de>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Currently when driver model starts up it finds the root uclass and the
pinctrl uclass. This is because even the root node handles pinctrl
processing.
But this is not useful. The root node is not a real hardware device so
cannot require any particular pinmux settings. Also it means that the
memory leak tests fails, since they end up freeing more memory than
they allocate: the marker it set after the root device and pinctrl
uclass are allocated, and later once the pinctrl uclass is freed the memory
used by driver model is less than when the marker was set.
If a platform needs 'core' pin mulitplex settings it can do this with
a driver that is probed on start-up. It would be an abuse of the root node
to use this for pinctrl.
To avoid this problem, only process pinctrl settings for non-root nodes.
Signed-off-by: Simon Glass <sjg@chromium.org>
fdtdec_get_addr_size() hard-codes the number of cells used to represent
an address or size in DT. This is incorrect in many cases depending on
the DT binding for a particular node or property (e.g. it is incorrect
for the "reg" property). In most cases, DT parsing code must use the
properties #address-cells and #size-cells to parse addres properties.
This change splits up the implementation of fdtdec_get_addr_size() so
that the core logic can be used for both hard-coded and non-hard-coded
cases. Various wrapper functions are implemented that support cases
where hard-coded cell counts should or should not be used, and where
the client does and doesn't know the parent node ID that contains the
properties #address-cells and #size-cells.
dev_get_addr() is updated to use the new functions.
Core functionality in fdtdec_get_addr_size_fixed() is widely tested via
fdtdec_get_addr_size(). I tested fdtdec_get_addr_size_auto_noparent() and
dev_get_addr() by manually modifying the Tegra I2C driver to invoke them.
Much of the core implementation of fdtdec_get_addr_size_fixed(),
fdtdec_get_addr_size_auto_parent(), and
fdtdec_get_addr_size_auto_noparent() comes from Thierry Reding's
previous commit "fdt: Fix fdtdec_get_addr_size() for 64-bit".
Based-on-work-by: Thierry Reding <treding@nvidia.com>
Cc: Thierry Reding <treding@nvidia.com>
Cc: Simon Glass <sjg@chromium.org>
Cc: Michal Suchanek <hramrach@gmail.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Simon Glass <sjg@chromium.org>
Dropped #define DEBUG at the top of fdtdec.c:
Signed-off-by: Simon Glass <sjg@chromium.org>
All devices should bind without error. But when they don't, they can cause
driver model init to fail. A real situation where this can happen is when
there is a missing uclass.
Add a debug() call to dm_scan_fdt_node to make this easier to track.
Signed-off-by: Simon Glass <sjg@chromium.org>
When a uclass definition is missing, no drivers in that uclass can operate.
This can happen if a board has a strange collection of options (e.g. the
driver is enabled but the uclass is not).
Unfortunately this is very confusing at present. Starting up driver model
results in a -ENOENT error, which is pretty generic. Quite a big of digging
is needed to get to the root cause.
To help with this, change the error to a very strange one with no other
users in U-Boot. Also add a debug message.
Signed-off-by: Simon Glass <sjg@chromium.org>
This creates a new framework for handling of pin control devices,
i.e. devices that control different aspects of package pins.
This uclass handles pinmuxing and pin configuration; pinmuxing
controls switching among silicon blocks that share certain physical
pins, pin configuration handles electronic properties such as pin-
biasing, load capacitance etc.
This framework can support the same device tree bindings, but if you
do not need full interface support, you can disable some features to
reduce memory foot print. Typically around 1.5KB is necessary to
include full-featured uclass support on ARM board (CONFIG_PINCTRL +
CONFIG_PINCTRL_FULL + CONFIG_PINCTRL_GENERIC + CONFIG_PINCTRL_PINMUX),
for example.
We are often limited on code size for SPL. Besides, we still have
many boards that do not support device tree configuration. The full
pinctrl, which requires OF_CONTROL, does not make sense for those
boards. So, this framework also has a Do-It-Yourself (let's say
simple pinctrl) interface. With CONFIG_PINCTRL_FULL disabled, the
uclass itself provides no systematic mechanism for identifying the
peripheral device, applying pinctrl settings, etc. They must be
done in each low-level driver. In return, you can save much memory
footprint and it might be useful especially for SPL.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Simon Glass <sjg@chromium.org>
This is useful when we want to bind a device, but do not need the
pointer to the device.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Simon Glass <sjg@chromium.org>
Add Kconfig entries for the simple-bus driver, both for U-Boot
and for SPL. The simple-bus is enabled by default in U-Boot and
disabled by default in SPL to preserve the original behavior.
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Simon Glass <sjg@chromium.org>
Acked-by: Simon Glass <sjg@chromium.org>
Modified to fit on top of Masahiro's $(SPL) setup:
Signed-off-by: Simon Glass <sjg@chromium.org>
This is a convenient way for a driver to get the hardware address of a
device, when regmap or syscon are not being used. Change existing callers
to use it as an example to others.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Joe Hershberger <joe.hershberger@ni.com>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
The device might have already been probed during the call to
device_probe() on its parent device (e.g. PCI bridge devices).
In its parent device's probe routine, it might probe all of
its child devices via device_probe() thus the codes reenter
device_probe_child(). To support code reentrancy, test these
allocated memory against NULL to avoid memory leak, and return
to the caller if dev->flags has DM_FLAG_ACTIVATED set after
device_probe() returns, so that we don't mess up the device.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>
We have flipped CONFIG_SPL_DISABLE_OF_CONTROL. We have cleansing
devices, $(SPL_) and CONFIG_IS_ENABLED(), so we are ready to clear
away the ugly logic in include/fdtdec.h:
#ifdef CONFIG_OF_CONTROL
# if defined(CONFIG_SPL_BUILD) && !defined(SPL_OF_CONTROL)
# define OF_CONTROL 0
# else
# define OF_CONTROL 1
# endif
#else
# define OF_CONTROL 0
#endif
Now CONFIG_IS_ENABLED(OF_CONTROL) is the substitute. It refers to
CONFIG_OF_CONTROL for U-boot proper and CONFIG_SPL_OF_CONTROL for
SPL.
Also, we no longer have to cancel CONFIG_OF_CONTROL in
include/config_uncmd_spl.h and scripts/Makefile.spl.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
We do not want to compile the DM remove code for SPL. Currently,
we undef it in include/config_uncmd_spl.h (for C files) and in
scripts/Makefile.uncmd_spl (for Makefiles). This is really ugly.
This commit demonstrates how we can deprecate those two files.
Use $(SPL_) for the entry in the Makfile and CONFIG_IS_ENABLED()
in C files.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
The menuconfig for drivers are getting more and more cluttered
and unreadable because too many entries are displayed in a single
flat menu. Use hierarchic menu for each category.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
[trini: Update to apply again in a few places, drop USB hunk]
Signed-off-by: Tom Rini <trini@konsulko.com>
Some devices are bound entirely by probing and do not have the benefit of
a device tree to give them a name. This is very common with PCI and USB. In
most cases this is fine, but we should add an official way to set a device
name. This should be called in the device's bind() method.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This new command can dump all device resources associated to
each device. The fields in every line shows:
- The address of the resource
- The size of the resource
- The name of the release function
- The stage in which the resource has been acquired (BIND/PROBE)
Currently, there is no driver using devres, but if such drivers are
implemented, the output of this command should look like this:
=> dm devres
- root_driver
- soc
- extbus
- serial@54006800
bfb541e8 (8 byte) devm_kmalloc_release BIND
bfb54440 (4 byte) devm_kmalloc_release PROBE
bfb54460 (4 byte) devm_kmalloc_release PROBE
- serial@54006900
bfb54270 (8 byte) devm_kmalloc_release BIND
- gpio@55000000
- i2c@58780000
bfb5bce8 (12 byte) devm_kmalloc_release PROBE
bfb5bd10 (4 byte) devm_kmalloc_release PROBE
- eeprom
bfb54418 (12 byte) devm_kmalloc_release BIND
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Simon Glass <sjg@chromium.org>
Currently, Devres requires additional 16 byte for each allocation,
which is not so insignificant in some cases.
Add CONFIG_DEVRES to make this framework optional.
If the option is disabled, devres functions fall back to
non-managed variants. For example, devres_alloc() to kzalloc(),
devm_kmalloc() to kmalloc(), etc.
Because devres_head is also surrounded by an ifdef conditional,
there is no memory overhead when CONFIG_DEVRES is disabled.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Suggested-by: Simon Glass <sjg@chromium.org>
Acked-by: Simon Glass <sjg@chromium.org>
devm_kmalloc() is identical to kmalloc() except that the memory
allocated with it is managed and will be automatically released
when the device is removed/unbound.
Likewise for the other variants.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Simon Glass <sjg@chromium.org>
In U-Boot's driver model, memory is basically allocated and freed
in the core framework. So, low level drivers generally only have
to specify the size of needed memory with .priv_auto_alloc_size,
.platdata_auto_alloc_size, etc. Nevertheless, some drivers still
need to allocate/free memory on their own in case they cannot
statically know the necessary memory size. So, I believe it is
reasonable enough to port Devres into U-boot.
Devres, which originates in Linux, manages device resources for each
device and automatically releases them on driver detach. With devres,
device resources are guaranteed to be freed whether initialization
fails half-way or the device gets detached.
The basic idea is totally the same to that of Linux, but I tweaked
it a bit so that it fits in U-Boot's driver model.
In U-Boot, drivers are activated in two steps: binding and probing.
Binding puts a driver and a device together. It is just data
manipulation on the system memory, so nothing has happened on the
hardware device at this moment. When the device is really used, it
is probed. Probing initializes the real hardware device to make it
really ready for use.
So, the resources acquired during the probing process must be freed
when the device is removed. Likewise, what has been allocated in
binding should be released when the device is unbound. The struct
devres has a member "probe" to remember when the resource was
allocated.
CONFIG_DEBUG_DEVRES is also supported for easier debugging.
If enabled, debug messages are printed each time a resource is
allocated/freed.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Simon Glass <sjg@chromium.org>
Currently, we only have DM_FLAG_ACTIVATED to indicate the device
status, but we still cannot know in which stage is in progress,
binding or probing.
This commit introduces a new flag, DM_FLAG_BOUND, which is set when
the device is really bound, and cleared when it is unbound.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Simon Glass <sjg@chromium.org>
The 'ranges' property can be used to specify a translation from the system
address to the bus address. Add support for this using the dev_get_addr()
function, which devices should use to find their address.
Signed-off-by: Simon Glass <sjg@chromium.org>
Not all boards use garbage collection in their link step, so we should avoid
adding options that rely on this for prevention of code bloat. Add separate
Kconfig options for syscon and regmap uclasses.
Signed-off-by: Simon Glass <sjg@chromium.org>
It is common for one node to reference another via a phandle. Add support
for obtaining an attached device by this method. As an example, a node may
have a 'power-supply' property which references a regulator, allowing the
driver to turn on its power.
Signed-off-by: Simon Glass <sjg@chromium.org>
This function needs to check the list has entries before traversing it.
Fix this bug.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Document that mixing DM_DEVICE_REMOVE and DM_USB is a bad idea, and also why
this is a bad idea.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Simon Glass <sjg@chromium.org>
These functions are useful to remove all children from an usb bus before
rescanning the bus. Give them a better name and export them.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Simon Glass <sjg@chromium.org>
As you see in driver/Makefile, Kbuild descends into the driver/core/
directory only when CONFIG_DM is enabled.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Simon Glass <sjg@chromium.org>
Currently, DM_FLAG_ACTIVATED is set twice; before calling
uclass_pre_probe_device() and again before calling drv->probe().
It looks like Simon's intention is the first one.
The DM_FLAG_ACTIVATED was moved twice, by commit 02eeb1bbb1
(dm: core: Mark device as active before calling its probe()
method), and then by commit 206d4d2b4b (dm: core: Mark device
as active before calling uclass probe() methods).
The first marking was added by the last move.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Simon Glass <sjg@chromium.org>
The command "dm uclass" tries to display all the UClasses, but
some of them might be disabled by Kconfig.
The function do_dm_dump_uclass() iterates over all the UClass IDs
and calls uclass_get() for each of them. Then, it displays annoying
message "Cannot find uclass for id ..." every time it fails to get
the UClass.
As a result, we get much noisier log for the "dm uclass" command.
=> dm uclass
uclass 0: root
- * root_driver @ bfb54028, seq 0, (req -1)
Cannot find uclass for id 1: please add the UCLASS_DRIVER() ...
Cannot find uclass for id 2: please add the UCLASS_DRIVER() ...
Cannot find uclass for id 3: please add the UCLASS_DRIVER() ...
Cannot find uclass for id 4: please add the UCLASS_DRIVER() ...
Cannot find uclass for id 5: please add the UCLASS_DRIVER() ...
Cannot find uclass for id 6: please add the UCLASS_DRIVER() ...
This commit suppresses these warnings.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Simon Glass <sjg@chromium.org>
This function can only handle a syscon device. It is possible that someone
will make a mistake, so add a check for this.
Also we should return -ENODEV when a device cannot be found, so update the
syscon_get_regmap_by_driver_data() to follow this convention.
Signed-off-by: Simon Glass <sjg@chromium.org>
Many SoCs have a number of system controllers which are dealt with as a
group by a single driver. It is a pain to have to add lots of compatible
strings and/or separate drivers for each. Instead we can identify the
controllers by a number and request the address of the one we want.
Add a simple implementation of this which can be used by SoC driver code.
Signed-off-by: Simon Glass <sjg@chromium.org>
Add a simple implementaton of register maps, supporting only direct I/O
for now. This can be enhanced later to support buses which have registers,
such as I2C, SPI and PCI.
It allows drivers which can operate with multiple buses to avoid dealing
with the particulars of register access on that bus.
Signed-off-by: Simon Glass <sjg@chromium.org>
