Commit graph

187 commits

Author SHA1 Message Date
Simon Glass
5b896ed585 event: Add events for device probe/remove
Generate events when devices are probed or removed, allowing hooks
to be added for these situations.

This is controlled by the DM_EVENT config option.

Signed-off-by: Simon Glass <sjg@chromium.org>
2022-03-10 08:28:36 -05:00
Heinrich Schuchardt
185f812c41 doc: replace @return by Return:
Sphinx expects Return: and not @return to indicate a return value.

find . -name '*.c' -exec \
sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \;

find . -name '*.h' -exec \
sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \;

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
2022-01-19 18:11:34 +01:00
Michal Simek
d8ef446fec dm: core: Switch order of pinctrl and power domain calls
The commit 3ad3077848 ("dm: core: device: enable power domain in probe")
introduced enabling power domain when device is probed.
By checking this sequence in Linux kernel was found that power domain is
handled first followed by pinctrl setting.

This patch is switching this order to follow Linux kernel that power
domains are handled first follow by pinctrl setting.

The issue was found on Xilinx Kria SOM where firmware is blocking setting
up pin configuration/muxes without enabling power domain for the specific
IP first.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2022-01-13 09:13:41 -07:00
Simon Glass
6476c4d981 dm: core: Allow getting some basic stats
Add a function that returns some basic stats about driver model. For now
we only have two.

Signed-off-by: Simon Glass <sjg@chromium.org>
2021-12-23 10:24:40 -05:00
Patrick Delaunay
af13df7014 dm: add debug message when failed to select the default pinctrl
Add a message on probe in driver model core when the default
pinctrl selection failed.

This message is displayed only when the pinctrl API is
implemented, i.e. when result is not ENOSYS.

Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2021-12-01 13:33:45 -05:00
Simon Glass
4b030177b6 dm: core: Allow finding children / uclasses by partial name
In some cases it is useful to search just by a partial name, such as
when looking for a sibling device that has a common name substring. Add
helper functions to handle these requirements.

Signed-off-by: Simon Glass <sjg@chromium.org>
2021-11-28 16:51:51 -07:00
Mark Kettenis
40dbf03d7d iommu: Add IOMMU uclass
This uclass is intended to manage IOMMUs on systems where the
IOMMUs are not in bypass mode by default.  In that case U-Boot
cannot ignore the IOMMUs if it wants to use devices that need
to do DMA and sit behind such an IOMMU.

This initial IOMMU uclass implementation does not implement and
device ops and is intended for IOMMUs that have a bypass mode
that does not require address translation.  Support for IOMMUs
that do require address translation is planned and device ops
will be defined when support for such IOMMUs will be added.

Signed-off-by: Mark Kettenis <kettenis@openbsd.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
2021-10-31 08:46:44 -04:00
Tom Rini
776bf6a545 - Disable ATAGS for STM32 MCU and MPU boards
- Disable bi_boot_params for STM32 MCU and MPU boards
 - Update stm32-usbphyc node management
 - Convert CONFIG_STM32_FLASH to Kconfig for STM32 MCU boards
 - Convert some USB config flags to Kconfig for various boards
 - Convert CONFIG_BOOTCOMMAND flag to Kconfig for STM32 F429 board
 - Remove specific CONFIG_STV0991 flags
 - Remove unused CONFIG_USER_LOWLEVEL_INIT flag
 - Add ofdata_to_platdata() callback for stm32_spi driver
 - Update for stm32f7_i2c driver
 - Remove gpio_hog_probe_all() from STM32 MP1 board
 - Fix bind command
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Merge tag 'u-boot-stm32-20211012' of https://source.denx.de/u-boot/custodians/u-boot-stm

- Disable ATAGS for STM32 MCU and MPU boards
- Disable bi_boot_params for STM32 MCU and MPU boards
- Update stm32-usbphyc node management
- Convert CONFIG_STM32_FLASH to Kconfig for STM32 MCU boards
- Convert some USB config flags to Kconfig for various boards
- Convert CONFIG_BOOTCOMMAND flag to Kconfig for STM32 F429 board
- Remove specific CONFIG_STV0991 flags
- Remove unused CONFIG_USER_LOWLEVEL_INIT flag
- Add ofdata_to_platdata() callback for stm32_spi driver
- Update for stm32f7_i2c driver
- Remove gpio_hog_probe_all() from STM32 MP1 board
- Fix bind command

Signed-off-by: Tom Rini <trini@konsulko.com>
2021-10-12 12:01:00 -04:00
Patrice Chotard
38f7d3b653 cmd: bind: Fix driver binding on a device
Fix a regression brings by commit 84f8e36f03 ("cmd: bind: allow to
bind driver with driver data")

As example, the following bind command doesn't work:

   bind /soc/usb-otg@49000000 usb_ether

As usb_ether driver has no compatible string, it can't be find by
lists_bind_fdt(). In bind_by_node_path(), which called lists_bind_fdt(),
the driver entry is known, pass it to lists_bind_fdt() to force the driver
entry selection.

For this, add a new parameter struct *driver to lists_bind_fdt().
Fix also all lists_bind_fdt() callers.

Fixes: 84f8e36f03 ("cmd: bind: allow to bind driver with driver data")
Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>
Reported-by: Herbert Poetzl <herbert@13thfloor.at>
Cc: Marek Vasut <marex@denx.de>
Cc: Herbert Poetzl <herbert@13thfloor.at>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2021-10-12 14:19:52 +02:00
Simon Glass
414cc15144 treewide: Simply conditions with the new OF_REAL
Use this new Kconfig to simplify the compilation conditions where
appropriate.

Signed-off-by: Simon Glass <sjg@chromium.org>
2021-09-25 09:46:15 -06:00
Simon Glass
4bbaa88fad dm: core: Add logging for DM_SEQ_ALIAS
It is sometimes helpful to see which sequence is assigned to a device.
Add debugging info for that.

Signed-off-by: Simon Glass <sjg@chromium.org>
2021-07-21 10:27:34 -06:00
Sean Anderson
6e33eba59f clk: Allow force setting clock defaults before relocation
Since 291da96b8e ("clk: Allow clock defaults to be set during re-reloc
state for SPL only") it has been impossible to set clock defaults before
relocation. This is annoying on boards without SPL, since there is no way
to set clock defaults before U-Boot proper. In particular, the aisram rate
must be changed before relocation on the K210, since U-Boot will hang if we
try and change the rate while we are using aisram.

To get around this, extend the stage parameter to allow force setting
defaults, even if they would be otherwise postponed for later. A device
tree property was decided against because of the concerns in the original
commit thread about the overhead of repeatedly parsing the device tree.

Signed-off-by: Sean Anderson <seanga2@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2021-06-17 09:40:57 +08:00
Simon Glass
cfb9c9b77c dm: core: Use separate priv/plat data region
Make use of the new priv/plat data region if enabled. This is implemented
as a simple offset from the position set up by dtoc to the new position.

So long as all access goes through dm_priv_to_rw() this is safe.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
2021-03-26 17:03:09 +13:00
Simon Glass
6f644efdd8 dm: core: Move flags to device-runtime info
When of-platdata-inst is active, use the flags in the new udevice_rt
table, dropping them from the main struct udevice. This ensures that the
latter is not updated at runtime.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
2021-03-26 17:03:09 +13:00
Simon Glass
cc469b7086 dm: Rename device_get_by_driver_info_idx()
This function finds a device by its driver_info index. With
of-platdata-inst we do not use driver_info, but instead instantiate
udevice records at build-time.

However the semantics of using the function are the same in each case:
the caller provides an index and gets back a device.

So rename the function to device_get_by_ofplat_idx(), so that it can be
used for both situations. The caller does not really need to worry about
the details.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
2021-03-26 17:03:08 +13:00
Simon Glass
6ba46a0f21 dm: core: Drop device_get_by_driver_info()
This function is now only used in a test. Drop it. Also drop
DM_DRVINFO_GET() which was the only purpose for having the function.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
2021-03-26 17:03:08 +13:00
Simon Glass
1ef3af3b27 dm: core: Allow dropping run-time binding of devices
With OF_PLATDATA_INST devices are bound at build time. We should not need
binding of devices at runtime in most cases. However it is inflexible to
absolutely prohibit it, so add an option to control this.

Update the driver model core so that it does not bind devices. Update
device_bind() to return an error if called.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
2021-03-22 19:23:28 +13:00
Simon Glass
15421b71bc dm: core: Add DM_DEVICE_REMOVE condition to all exit paths
At present device_bind() does some unnecessary work if a device fails to
bind in SPL. Add the missing conditions.

Also fix a style nit in the same function while we are here.

Signed-off-by: Simon Glass <sjg@chromium.org>
2021-03-03 19:17:25 -07:00
Simon Glass
24fd7e383d dm: core: Fix allocation of empty of-platdata
With of-platdata we always have a dtv struct that holds the platform data
provided by the driver_info record. However, this struct can be empty if
there are no actual devicetree properties provided.

The upshot of empty platform data is that it will end up as a zero-size
member in the BSS section, which is fine. But if the driver specifies
plat_auto then it expects the correct amount of space to be allocated.

At present this does not happen, since device_bind() assumes that the
platform-data size will always be >0. As a result we end up not
allocating the space and just use the BSS region, overwriting whatever
other contents are present.

Fix this by removing the condition that platform data be non-empty, always
allocating space if requested.

This fixes a strange bug that has been lurking since of-platdata was
implemented. It has likely never been noticed since devices normally have
at least some devicetree properties, BSS is seldom used on SPL, the dtv
structs are normally at the end of bss and the overwriting only happens
if a driver changes its platform data.

It was discovered using sandbox_spl, which exercises more features than
a normal board might, and the critical global_data variable 'gd' happened
to be at the end of BSS.

Fixes: 9fa2819009 ("dm: core: Expand platdata for of-platdata devices")
Signed-off-by: Simon Glass <sjg@chromium.org>
2021-03-03 19:17:25 -07:00
Nicolas Saenz Julienne
4abf68d57d dm: Introduce DMA constraints into the core device model
Calculating the DMA offset between a bus address space and CPU's every
time we call phys_to_bus() and bus_to_phys() isn't ideal performance
wise, as it implies traversing the device tree from the device's node up
to the root. Since this information is static and available before the
device's initialization, parse it before the probe call an provide the
DMA offset in 'struct udevice' for the address translation code to use
it.

Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Tested-by: Peter Robinson <pbrobinson@gmail.com>
Signed-off-by: Matthias Brugger <mbrugger@suse.com>
2021-02-18 11:56:25 +01:00
Simon Glass
401d1c4f5d common: Drop asm/global_data.h from common header
Move this out of the common header and include it only where needed.  In
a number of cases this requires adding "struct udevice;" to avoid adding
another large header or in other cases replacing / adding missing header
files that had been pulled in, very indirectly.   Finally, we have a few
cases where we did not need to include <asm/global_data.h> at all, so
remove that include.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Rini <trini@konsulko.com>
2021-02-02 15:33:42 -05:00
Simon Glass
017d421828 dm: core: Add a comment about pinctrl_select_state()
The use of pinctrl in the core of driver model is useful but can provoke
some strange behaviour. Add a comment to aid debugging.

Signed-off-by: Simon Glass <sjg@chromium.org>
2021-01-30 14:25:42 -07:00
Simon Glass
8a715530bb dm: core: Allow the uclass list to move
At present the uclass list head is in global_data. This is convenient
but with the new of-platdata we need the list head to be declared by
the generated code.

Change this over to be a pointer. Provide a 'static' version in
global_data to retain the current behaviour.

Signed-off-by: Simon Glass <sjg@chromium.org>
2021-01-05 12:24:41 -07:00
Simon Glass
f10643cf8a dm: core: Access device ofnode through functions
At present ofnode is present in the device even if it is never used. With
of-platdata this field is not used, so can be removed. In preparation for
this, change the access to go through inline functions.

Signed-off-by: Simon Glass <sjg@chromium.org>
2021-01-05 12:24:41 -07:00
Simon Glass
7d14ee443c dm: core: Use dev_has_ofnode() instead of dev_of_valid()
We have two functions which do the same thing. Standardise on
dev_has_ofnode() since there is no such thing as an 'invalid' ofnode in
normal operation: it is either null or missing.

Also move the functions into one place.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2021-01-05 12:24:41 -07:00
Simon Glass
c23405f817 dm: core: Rename dev_has_of_node() to dev_has_ofnode()
We use 'ofnode' rather than 'of_node' in U-Boot. Rename this function to
fit.

Signed-off-by: Simon Glass <sjg@chromium.org>
2021-01-05 12:24:41 -07:00
Simon Glass
73466df3e2 dm: core: Access device flags through functions
At present flags are stored as part of the device. In preparation for
storing them separately, change the access to go through inline functions.

Signed-off-by: Simon Glass <sjg@chromium.org>
2021-01-05 12:24:41 -07:00
Simon Glass
2462139fdd dm: core: Rename sqq to seq_
Now that the sequence-numbering migration is complete, rename this member
back to seq_, adding an underscore to indicate it is internal to driver
model.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
2021-01-05 12:24:41 -07:00
Simon Glass
82021e31a7 dm: core: Split out alloc code into a new function
Add a new function to handle the allocation of private/platform data for
a device. This will make it easier to skip this feature when using the new
of-platdata.

Signed-off-by: Simon Glass <sjg@chromium.org>
2021-01-05 12:24:41 -07:00
Simon Glass
fb8c9fb3fa dm: core: Rename the priv/plat members
These are supposed to be private to driver model, not accessed by any code
outside. Add a trailing underscore to indicate this.

Signed-off-by: Simon Glass <sjg@chromium.org>
2021-01-05 12:24:40 -07:00
Simon Glass
89ba6d5535 dm: core: Use access methods for dev/uclass private data
Use these functions in the core code as much as possible. With this, there
are only two places where each priv/plat pointer is accessed, one for read
and one for write.

Signed-off-by: Simon Glass <sjg@chromium.org>
2021-01-05 12:24:40 -07:00
Simon Glass
12559f5bab dm: core: Add functions to set priv/plat
This should not normally be needed in drivers, but add accessors for the
few cases that exist.

Signed-off-by: Simon Glass <sjg@chromium.org>
2021-01-05 12:24:40 -07:00
Simon Glass
7f20d1d249 dm: core: Drop seq and req_seq
Now that migration to the new sequence numbers is complete, drop the old
fields. Add a test that covers the new behaviour.

Also drop the check for OF_PRIOR_STAGE since we always assign sequence
numbers now.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-12-18 20:32:21 -07:00
Simon Glass
a133e2179a dm: core: Update uclass_find_next_free_req_seq() for new scheme
This function current deals with req_seq which is deprecated. Update it to
use the new sequence numbers, putting them above existing aliases. Rename
the function to make this clear.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-12-18 20:32:21 -07:00
Simon Glass
991759196f dm: Drop the unused arg in uclass_find_device_by_seq()
Now that there is only one sequence number (rather than both requested and
assigned ones) we can simplify this function. Also update its caller to
simplify the logic.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-12-18 20:32:21 -07:00
Simon Glass
b5b11558bc dm: Drop uclass_resolve_seq()
This function is not needed anymore. Drop it.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-12-18 20:32:21 -07:00
Simon Glass
15a1196be8 dm: core: Allow manual sequence numbering
Some buses have their own rules which require assigning sequence numbers
with a bus-specific algorithm. For example, PCI requires that sub-buses
are numbered higher than their parent buses, meaning effectively that
parent buses must be numbered only after all of their child buses have
been numbered.

Add a uclass flag to indicate that driver model should not assign sequence
numbers. In this case, the uclass must do it.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-12-18 20:32:21 -07:00
Simon Glass
ba0e7daeef dm: core: Switch binding to use new sequence numbers
Update the core logic to use the new approach. For now the old code is
left as is. Update one test so it still passes.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-12-18 20:32:21 -07:00
Simon Glass
cd53e5bf4b dm: core: Add a new sequence number for devices
At present each device has two sequence numbers, with 'req_seq' being
set up at bind time and 'seq' at probe time. The idea is that devices
can 'request' a sequence number and then the conflicts are resolved when
the device is probed.

This makes things complicated in a few cases, since we don't really know
what the sequence number will end up being. We want to honour the
bind-time requests if at all possible, but in fact the only source of
these at present is the devicetree aliases. Since we have the devicetree
available at bind time, we may as well just use it, in the hope that the
required processing will turn out to be useful later (i.e. the device
actually gets used).

Add a new 'sqq' member, the bind-time sequence number. It operates in
parallel to the old values for now. All devices get a valid sqq value,
i.e. it is never -1.

Drop an #ifdef while we are here.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-12-18 20:32:21 -07:00
Simon Glass
d03adb4a78 dm: core: Update uclass_find_next_free_req_seq() args
At present this is passed a uclass ID and it has to do a lookup. The
callers all have the uclass pointer, except for the I2C uclass where the
code will soon be deleted.

Update the argument to a uclass * instead of an ID since it is more
efficient.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-12-18 20:32:21 -07:00
Simon Glass
8b85dfc675 dm: Avoid accessing seq directly
At present various drivers etc. access the device's 'seq' member directly.
This makes it harder to change the meaning of that member. Change access
to go through a function instead.

The drivers/i2c/lpc32xx_i2c.c file is left unchanged for now.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-12-18 20:32:21 -07:00
Simon Glass
d1998a9fde dm: treewide: Rename ofdata_to_platdata() to of_to_plat()
This name is far too long. Rename it to remove the 'data' bits. This makes
it consistent with the platdata->plat rename.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-12-13 16:51:09 -07:00
Simon Glass
c69cda25c9 dm: treewide: Rename dev_get_platdata() to dev_get_plat()
Rename this to be consistent with the change from 'platdata'.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-12-13 16:51:09 -07:00
Simon Glass
4f50086ad6 dm: Rename 'platdata_size' to 'plat_size'
Rename this to be consistent with the change from 'platdata'.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-12-13 16:51:09 -07:00
Simon Glass
caa4daa2ae dm: treewide: Rename 'platdata' variables to just 'plat'
We use 'priv' for private data but often use 'platdata' for platform data.
We can't really use 'pdata' since that is ambiguous (it could mean private
or platform data).

Rename some of the latter variables to end with 'plat' for consistency.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-12-13 16:51:08 -07:00
Simon Glass
41575d8e4c dm: treewide: Rename auto_alloc_size members to be shorter
This construct is quite long-winded. In earlier days it made some sense
since auto-allocation was a strange concept. But with driver model now
used pretty universally, we can shorten this to 'auto'. This reduces
verbosity and makes it easier to read.

Coincidentally it also ensures that every declaration is on one line,
thus making dtoc's job easier.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-12-13 08:00:25 -07:00
Simon Glass
e80be74934 dm: core: Drop device_bind_offset()
This function is not needed since the standard device_bind() can be used
instead. Drop it.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-12-13 07:58:18 -07:00
Simon Glass
734206dda1 dm: core: Rename device_bind_ofnode() to device_bind()
This is the standard function to use when binding devices. Drop the
'_ofnode' suffix to make this clear.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-12-13 07:58:18 -07:00
Simon Glass
e12052b322 dm: core: Rename device_bind() to device_bind_offset()
This function is not necessary anymore, since device_bind_ofnode() does
the same thing and works with both flattree and livetree.

Rename it to indicate that it is special.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-12-13 07:58:17 -07:00
Simon Glass
8a38abfc43 dm: Use driver_info index instead of pointer
At present we use a 'node' pointer in the of-platadata phandle_n_arg
structs. This is a pointer to the struct driver_info for a particular
device, and we can use it to obtain the struct udevice pointer itself.

Since we don't know the struct udevice pointer until it is allocated in
memory, we have to fix up the phandle_n_arg.node at runtime. This is
annoying since it requires that SPL's data is writable and adds a small
amount of extra (generated) code in the dm_populate_phandle_data()
function.

Now that we can find a driver_info by its index, it is easier to put the
index in the phandle_n_arg structures.

Update dtoc to do this, add a new device_get_by_driver_info_idx() to look
up a device by drive_info index and update the tests to match.

Signed-off-by: Simon Glass <sjg@chromium.org>
2020-10-29 14:42:18 -06:00