Commit graph

1198 commits

Author SHA1 Message Date
Tom Rini
8f7a16aac3 - adds adc-keys button driver
- fix meson-saradc driver to get reference voltage
 - add adc-keys test for sandbox
 - enable adc-keys for VIM3 & VIM3L boards
 - fix button.h build
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCgAdFiEEPVPGJshWBf4d9CyLd9zb2sjISdEFAmAzv0gACgkQd9zb2sjI
 SdGUaw//ZeWLd5uVOIb7lWW/LyEM8gjll3SGm40YMvxucBkb3tYyQzWpInUDAua0
 +rOpXptlCZ6WMfTJ2PhB0e30aZexgN3XsvHYEMEV7MGmk1HoUfqGHiDWcI1pDLD0
 p8cmoNoDYWDUqj1J1ibUUOjK+SrAXjezp+kxSjP0ttpXX2RxhXEZrFwzSK6uqUZk
 acqLwg+dOZZLtYZb1gYiDu2NHxnLEqRGqoG/D5emKjZQ3Ofquw+/TFawWpZH5qZf
 cRWCtEo8b9QMdgkI9wvgTHPfPGIP3mkRfQpGrhUmtDsX15s3VVIsEDtjmLluXn6P
 TjVocElz2BrsYENFLo7vt/V7A7MQ6n/276y3H6hyzPwM/LMPLWUsSowiYPVgfXzy
 td8f5NgH8996LN79ia8ZlVYeV3XJu1w26l7kSfBpybS1HVXNTSCsHy5a9y2vjl1B
 YH2O8i7yLxwld/ce0oQtu+6SiFaKWBUdc1FQXOvXeYy89VsRqvaS7RMI2yF3GCcb
 Ov38QVkq2hWIyz4CfpyKtXGSr/H7tOtQdEi9eAMeJwbBprMh/fjpeI8M0QAGdAW0
 F5jUFHK4+BFlqOFphTb00SYLFPCBRfK4kwg2azfQs4589ShlcLaY1RkGRsezLCj2
 bqwITNC+bLup5MSseBr/CgMaXR7JMxbYOuYlLupzRyo5yI0MWvo=
 =/PJV
 -----END PGP SIGNATURE-----

Merge tag 'u-boot-amlogic-20210222' of https://gitlab.denx.de/u-boot/custodians/u-boot-amlogic

- adds adc-keys button driver
- fix meson-saradc driver to get reference voltage
- add adc-keys test for sandbox
- enable adc-keys for VIM3 & VIM3L boards
- fix button.h build
2021-02-22 12:37:02 -05:00
Nicolas Saenz Julienne
30b20e6b3f dm: test: Add test case for dev_phys_to_bus()/dev_bus_to_phys()
By reusing DT nodes already available in sandbox's test DT introduce a
test to validate dev_phys_to_bus()/dev_bus_to_phys().

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
Nicolas Saenz Julienne
e88018769c dm: test: Add test case for dev->dma_offset
Add test to validate dev->dma_offset is properly set on devices.

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
Nicolas Saenz Julienne
283628c412 dm: test: Add test case for dev_get_dma_ranges()
Introduce some new nodes in sandbox's test device-tree and dm tests in
order to validate dev_get_dma_range().

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
Marek Szyprowski
289d0ead28 test: add a simple test for the adc-keys button driver
Add adc-keys device to the sandbox/test.dts and connect it to the channel
#3 of the sandbox_adc driver. The default values sampled by sandbox_adc
driver determines that button3 and button4 are released and button5 is
pressed.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
2021-02-18 11:37:26 +01:00
Igor Opaniuk
9d1215be92 test: dm: tee: extend with RPC test
Extend existing DM tee tests adding test coverage for reverse RPC calls.
Currently this commit only adds tests for I2C requests from TEE driver
to TEE supplicant, for instance reading/writing data to emulated i2c
eeprom defines in standard sandbox test device tree
(arch/sandbox/dts/test.dtb):

=> i2c bus
Bus 0:	i2c@0  (active 0)
   2c: eeprom@2c, offset len 1, flags 0
   ...

Running TEE tests:
=> ut dm tee
Test: dm_test_tee: tee.c
Test: dm_test_tee: tee.c (flat tree)
Failures: 0

Signed-off-by: Igor Opaniuk <igor.opaniuk@foundries.io>
Reviewed-by: Simon Glass <sjg@chromium.org>
Acked-by: Etienne Carriere <etienne.carriere@linaro.org>
2021-02-16 11:48:20 -05:00
Igor Opaniuk
f4a60b0363 test: py: add pygit2 and pyelftools to requirements.txt
Add pygit2 and pyelftools to the list of packages for virtualenv
needed to run all sets of pytests.This fixes warnings like:

binman.elf_test.TestElf.testDecodeElf (subunit.RemotedTestCase):
Python elftools not available

Signed-off-by: Igor Opaniuk <igor.opaniuk@foundries.io>
Reviewed-by: Simon Glass <sjg@chromium.org>
2021-02-16 11:48:20 -05:00
Simon Glass
3f04db891a image: Check for unit addresses in FITs
Using unit addresses in a FIT is a security risk. Add a check for this
and disallow it.

CVE-2021-27138

Signed-off-by: Simon Glass <sjg@chromium.org>
Reported-by: Bruce Monroe <bruce.monroe@intel.com>
Reported-by: Arie Haenel <arie.haenel@intel.com>
Reported-by: Julien Lenoir <julien.lenoir@intel.com>
2021-02-15 22:31:54 -05:00
Simon Glass
124c255731 libfdt: Check for multiple/invalid root nodes
It is possible to construct a devicetree blob with multiple root nodes.
Update fdt_check_full() to check for this, along with a root node with an
invalid name.

CVE-2021-27097

Signed-off-by: Simon Glass <sjg@chromium.org>
Reported-by: Bruce Monroe <bruce.monroe@intel.com>
Reported-by: Arie Haenel <arie.haenel@intel.com>
Reported-by: Julien Lenoir <julien.lenoir@intel.com>
2021-02-15 22:31:53 -05:00
Simon Glass
d5f3aadacb test: Add tests for the 'evil' vboot attacks
Add tests to check that these two attacks are mitigated by recent patches.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reported-by: Bruce Monroe <bruce.monroe@intel.com>
Reported-by: Arie Haenel <arie.haenel@intel.com>
Reported-by: Julien Lenoir <julien.lenoir@intel.com>
2021-02-15 19:17:33 -05:00
Simon Glass
fafafacb47 test: Add vboot_evil implementation
Add a library which performs two different attacks on a FIT.

Signed-off-by: Julien Lenoir <julien.lenoir@intel.com>
Signed-off-by: Bruce Monroe <bruce.monroe@intel.com>
Signed-off-by: Arie Haenel <arie.haenel@intel.com>
Signed-off-by: Simon Glass <sjg@chromium.org>
2021-02-15 19:17:29 -05:00
Simon Glass
79af75f777 fit: Don't allow verification of images with @ nodes
When searching for a node called 'fred', any unit address appended to the
name is ignored by libfdt, meaning that 'fred' can match 'fred@1'. This
means that we cannot be sure that the node originally intended is the one
that is used.

Disallow use of nodes with unit addresses.

Update the forge test also, since it uses @ addresses.

CVE-2021-27138

Signed-off-by: Simon Glass <sjg@chromium.org>
Reported-by: Bruce Monroe <bruce.monroe@intel.com>
Reported-by: Arie Haenel <arie.haenel@intel.com>
Reported-by: Julien Lenoir <julien.lenoir@intel.com>
2021-02-15 19:17:25 -05:00
Tom Rini
2ae80437fb Merge branch '2021-02-02-drop-asm_global_data-when-unused'
- Merge the patch to take <asm/global_data.h> out of <common.h>
2021-02-15 10:16:45 -05:00
Marek Vasut
cc6f4c8f25 dm: core: Add late driver remove option
Add another flag to the DM core which could be assigned to drivers and
which makes those drivers call their remove callbacks last, just before
booting OS and after all the other drivers finished with their remove
callbacks. This is necessary for things like clock drivers, where the
other drivers might depend on the clock driver in their remove callbacks.
Prime example is the mmc subsystem, which can reconfigure a card from HS
mode to slower modes in the remove callback and for that it needs to
reconfigure the controller clock.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Signed-off-by: Simon Glass <sjg@chromium.org>
2021-02-03 03:38:41 -07:00
Simon Glass
c51d2e704a dm: core: Avoid partially removing devices
At present if device_remove() decides that the device should not actually
be removed, it still calls the uclass pre_remove() method and powers the
device down.

Signed-off-by: Simon Glass <sjg@chromium.org>
2021-02-03 03:38:41 -07:00
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
Stephen Warren
372497572b test/py: fix runtest wrapper for pytest 6
The implementation of pytest_runtest_protocol() must call
pytest_runtest_logstart() and pytest_runtest_logfinish(). This appears to
be necessary even in pytest 5.2.1 judging by the default version of
pytest_runtest_protocol(), but evidently some form of code reorganization
in pytest only made this have a practical effect in the newer version. I'd
previously been under the impression that 100% of the required work of
pytest_runtest_protocol() was handled by the fact it called
runtestprotocol() as its implementation. However, it appears that custom
implementations do need to do a little more than this.

Reported-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
2021-02-01 16:33:02 -05:00
Simon Glass
ff5fa7d626 dm: core: Update ofnode_read_fmap_entry() to read hashes
At present this function uses the old format for reading hashes. Add
support for the current format.

Add a test while we are here.

Signed-off-by: Simon Glass <sjg@chromium.org>
2021-01-30 14:25:42 -07:00
Simon Glass
d85f2c4f29 sandbox: Disable I2C emulators in SPL
These cannot work with of-platdata since they currently need the
devicetree at runtime. Disable the emulators and the sandbox I2C driver
that needs them. We can enable these later, if needed for testing.

Switch the of_plat_parent test over to use a simple bus instead.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heiko Schocher <hs@denx.de>
2021-01-30 14:25:41 -07:00
Simon Glass
10f746591f cros_ec: Add vstore support
The EC can store small amounts of data for the benefit of the
verified boot process. Since the EC is seldom reset, this can allow the
AP to store data that survives a reboot or a suspend/resume cycle.

Add support for this.

Signed-off-by: Simon Glass <sjg@chromium.org>
2021-01-30 14:25:41 -07:00
Simon Glass
3ae338299e cros_ec: Show events in human-readable form
Add a command to show the current events as a list of names. This is
easier to decipher than a bit mask.

Signed-off-by: Simon Glass <sjg@chromium.org>
2021-01-30 14:25:41 -07:00
Simon Glass
3a6c994f38 cros_ec: Add support for switches
On x86 platforms the EC provides a way to read 'switches', which are
on/off values determined by the EC.

Add a new driver method for this and implement it for LPC.

Signed-off-by: Simon Glass <sjg@chromium.org>
2021-01-30 14:25:41 -07:00
Simon Glass
8aec32f6ab cros_ec: Support reading EC features
The EC can support a variety of features and provides a way to find out
what is available. Add support for this.

Also update the feature list to the lastest available while we are here.
This is at:

   https://chromium.googlesource.com/chromiumos/platform/ec/+/refs/heads/master/include/ec_commands.h

Signed-off-by: Simon Glass <sjg@chromium.org>
2021-01-30 14:25:41 -07:00
Simon Glass
7791df576c cros_ec: Add support for reading the SKU ID
This allows reading strapping pins attached to the EC. Add an
implementation for this.

Signed-off-by: Simon Glass <sjg@chromium.org>
2021-01-30 14:25:41 -07:00
Simon Glass
d8e9a93895 cros_ec: Add a function for the hello message
This is used several times in this file. Put it in a function to avoid
code duplication.

Also add a test for this function. There are no cros_ec tests at present,
so it is time to update the code.

Signed-off-by: Simon Glass <sjg@chromium.org>
2021-01-30 14:25:41 -07:00
Heinrich Schuchardt
9d43b4106e test: inconsistent string tests
Excluding ut str in test/cmd_ut.c but compiling test/str_ut.c results in
failure of the Python test invoking the C unit tests as observed on
sipeed_riscv_smode_defconfig:

FAILED test/py/tests/test_ut.py::test_ut[ut_str_upper]

Allow to compile test/str_ut.c on all boards.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
2021-01-29 10:36:49 -05:00
Heinrich Schuchardt
fe158657a5 test: inconsistent bootm tests
Excluding ut bootm in test/cmd_ut.c but compiling test/bootm.c results in
failure of the Python test invoking the C unit tests as observed on
sipeed_riscv_smode_defconfig:

FAILED test/py/tests/test_ut.py::test_ut[ut_bootm_nop]
FAILED test/py/tests/test_ut.py::test_ut[ut_bootm_nospace]
FAILED test/py/tests/test_ut.py::test_ut[ut_bootm_silent]
FAILED test/py/tests/test_ut.py::test_ut[ut_bootm_silent_var]
FAILED test/py/tests/test_ut.py::test_ut[ut_bootm_subst]
FAILED test/py/tests/test_ut.py::test_ut[ut_bootm_subst_both]
FAILED test/py/tests/test_ut.py::test_ut[ut_bootm_subst_var]

Only compile test/bootm.c on the sandbox.

Fixes: f158ba15ee ("bootm: Add tests for fixup_silent_linux()")
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
2021-01-29 10:36:49 -05:00
Tom Rini
a59e59c9be test: Update test_fs to not use deprecated pytest.yield_fixture()
As noted in comments, yield_fixture has been deprecated for longer than
our minimum required version of pytest.  Newer versions of pytest cause
this to be a louder warning, and as the migration is trivial, perform it
now.

Signed-off-by: Tom Rini <trini@konsulko.com>
2021-01-29 10:36:49 -05:00
Heinrich Schuchardt
89d52afa5d test: correct entry point to pytest
With Pytest 6.0.2 'make tests' fails:

sandbox: Traceback (most recent call last):
  File "./test/py/test.py", line 20, in <module>
    sys.exit(load_entry_point('pytest', 'console_scripts', 'pytest')(args))
TypeError: console_main() takes 0 positional arguments but 1 was given

The definition of console_scripts has changed as follows:

Pytest 4.6.1:

[options.entry_points]
console_scripts =
        pytest=pytest:main
        py.test=pytest:main
        
Pytest 6.0.2:
        
[options.entry_points]
console_scripts =
    pytest=pytest:console_main
    py.test=pytest:console_main

The new function console_main() has a comment:
"This function is not meant for programmable use; use `main()`"

Hence let's call pytest.main() directly.
Move args processing into the __main__ paragraph.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Tested-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Tested-by: Tom Rini <trini@konsulko.com>
2021-01-29 10:36:49 -05:00
Heinrich Schuchardt
34d7f72a1d test: pr_cont_test.o depends on CONFIG_LOG=y
Compiling wandboard_defconfig with CONFIG_UT_LOG=y leads to a build error:

test/log/pr_cont_test.c: In function ‘log_test_pr_cont’:
test/log/pr_cont_test.c:28:14: error:
‘gd_t’ {aka ‘volatile struct global_data’} has no member named ‘log_fmt’
  log_fmt = gd->log_fmt;

We do not want to let CONFIG_UT_LOG depend on CONFIG_LOG=y because we have
tests for logging functions called with CONFIG_LOG=n.

Fix the build dependency.

Reported-by: Kever Yang <kever.yang@rock-chips.com>
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2021-01-29 10:36:49 -05:00
Tom Rini
e6b8e948ab test: test_ofplatdata: Mark as sandbox specific
This test checks for output specific to the sandbox device tree, mark it
as sandbox specific.

Signed-off-by: Tom Rini <trini@konsulko.com>
2021-01-29 10:34:34 -05:00
Simon Glass
9fe064646d bloblist: Support relocating to a larger space
Typically in TPL/SPL the bloblist is quite small. But U-Boot proper may
want to add a lot more to it, such as ACPI tables.

Add a way to expand the bloblist by relocating it in U-Boot proper, along
with the other relocation activities.

Signed-off-by: Simon Glass <sjg@chromium.org>
2021-01-27 17:03:16 -05:00
Heinrich Schuchardt
c0445c18d3 test: unit test for echo command
Provide a unit test for the unit command

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
2021-01-25 01:15:33 +01:00
Heinrich Schuchardt
0157619d5c doc: move test/py/README.md to HTML documentation
Convert test/py/README.md to restructured text and add it to the generated
HTML documentation.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
2021-01-23 09:53:46 -05:00
Heinrich Schuchardt
ca6583d4e0 doc: move test/README to HTML documentation
Move test/README to the 'Develop U-Boot' chapter of the HTML documentation.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
2021-01-23 09:53:46 -05:00
Pragnesh Patel
9e9a530a61 cmd: Add a pwm command
Add the command "pwm" for controlling the pwm channels. This
command provides pwm invert/config/enable/disable functionalities
via PWM uclass drivers

Signed-off-by: Pragnesh Patel <pragnesh.patel@sifive.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2021-01-18 15:23:06 -05:00
Heinrich Schuchardt
c548a3886e test: unit test for pr_err(), pr_cont()
Provide a unit test for printing via pr_err() and pr_cont().

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
2021-01-16 19:17:11 -05:00
Patrick Delaunay
76fde13883 test: correct the test prefix in ut str
Align the prefix used in cmd_ut_category function and name of tests
for ut str.
This patch solves the issues detected by "make qcheck" after previous
patch.

Fixes: fdc79a6b12 ("lib: Add a function to convert a string to upper case")
Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2021-01-16 14:49:09 -05:00
Patrick Delaunay
353df8d3c3 test: correct the test prefix in ut cmd_mem
Align the prefix used in cmd_ut_category function and name of tests
for ut mem.
This patch solves the issues detected by "make qcheck" after previous
patch.

Fixes: 550a9e7902 ("cmd: Update the memory-search command")
Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2021-01-16 14:49:09 -05:00
Simon Glass
6ea5df39e8 test: Only enable bloblist test when supported
This test cannot work unless CONFIG_BLOBLIST is enabled. Update it to add
that condition.

Reported-by: Kever Yang <kever.yang@rock-chips.com>
Signed-off-by: Simon Glass <sjg@chromium.org>
2021-01-16 14:49:09 -05:00
Simon Glass
ef7e264944 test: Avoid assuming sandbox board for bloblist test
This tests assumes it is running on sandbox. Add a few functions to handle
silencing the console on any board and use those instead.

Reported-by: Kever Yang <kever.yang@rock-chips.com>

Signed-off-by: Simon Glass <sjg@chromium.org>
2021-01-16 14:49:09 -05:00
Heinrich Schuchardt
af033ec8b4 test: test/lib/test_print.c depends on CONSOLE_RECORD
The tests in test/lib/test_print.c fail without CONFIG_CONSOLE_RECORD=y.

Add a build dependency.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
2021-01-16 11:58:49 -05:00
Patrick Delaunay
742346f6cc test: log: add test for console output of dropped messages
Add a new test to check the content of the dropped messages
sent to console puts function.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2021-01-15 14:36:11 -05:00
Patrick Delaunay
a4918b2310 test: add test for dropped trace before log_init
Add test for dropped trace before log_init, displayed by debug uart.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2021-01-15 14:36:11 -05:00
Patrick Delaunay
ce9af2a6b5 test: log: add test for dropped messages
Add a new test to check the dropped messages when LOG is not ready
with log_drop_count and the result of _log().

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2021-01-15 14:36:11 -05:00
Patrick Delaunay
6278ec1919 test: add LOGL_FORCE_DEBUG flags support in log tests
Add a check of the _log function with LOGL_FORCE_DEBUG flags,
used to force the trace display.

The trace should be displayed for all the level when flags
have LOGL_FORCE_DEBUG bit is set, for any filter.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Sean Anderson <seanga2@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2021-01-15 14:36:10 -05:00
Pali Rohár
1ce0e1cbcc Nokia RX-51: Add test for U-Boot serial console
This patch adds a new test which checks that U-Boot for Nokia RX-51 running
in qemu can print test line to serial console and also checks that test
line appeared on qemu serial console.

Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Pavel Machek <pavel@ucw.cz>
2021-01-12 10:59:04 +05:30
Dario Binacchi
15daa4860b dm: core: add a function to decode display timings
The patch adds a function to get display timings from the device tree
node attached to the device.

Signed-off-by: Dario Binacchi <dariobin@libero.it>
Reviewed-by: Simon Glass <sjg@chromium.org>
2021-01-12 10:58:05 +05:30
Dario Binacchi
d64b9cdcd4 fdt: translate address if #size-cells = <0>
The __of_translate_address routine translates an address from the
device tree into a CPU physical address. A note in the description of
the routine explains that the crossing of any level with
since inherited from IBM. This does not happen for Texas Instruments, or
at least for the beaglebone device tree. Without this patch, in fact,
the translation into physical addresses of the registers contained in the
am33xx-clocks.dtsi nodes would not be possible. They all have a parent
with #size-cells = <0>.

The CONFIG_OF_TRANSLATE_ZERO_SIZE_CELLS symbol makes translation
possible even in the case of crossing levels with #size-cells = <0>.

The patch acts conservatively on address translation, except for
removing a check within the of_translate_one function in the
drivers/core/of_addr.c file:

+
        ranges = of_get_property(parent, rprop, &rlen);
-       if (ranges == NULL && !of_empty_ranges_quirk(parent)) {
-               debug("no ranges; cannot translate\n");
-               return 1;
-       }
        if (ranges == NULL || rlen == 0) {
                offset = of_read_number(addr, na);
                memset(addr, 0, pna * 4);
		debug("empty ranges; 1:1 translation\n");

There are two reasons:
1 The function of_empty_ranges_quirk always returns false, invalidating
  the following if statement in case of null ranges. Therefore one of
  the two checks is useless.

2 The implementation of the of_translate_one function found in the
  common/fdt_support.c file has removed this check while keeping the one
  about the 1:1 translation.

The patch adds a test and modifies a check for the correctness of an
address in the case of enabling translation also for zero size cells.
The added test checks translations of addresses generated by nodes of
a device tree similar to those you can find in the files am33xx.dtsi
and am33xx-clocks.dtsi for which the patch was created.

The patch was also tested on a beaglebone black board. The addresses
generated for the registers of the loaded drivers are those specified
by the AM335x reference manual.

Signed-off-by: Dario Binacchi <dariobin@libero.it>
Tested-by: Dario Binacchi <dariobin@libero.it>
Reviewed-by: Simon Glass <sjg@chromium.org>
2021-01-12 10:58:05 +05:30
Dario Binacchi
2983ad55a1 clk: add clk_round_rate()
It returns the rate which will be set if you ask clk_set_rate() to set
that rate. It provides a way to query exactly what rate you'll get if
you call clk_set_rate() with that same argument.
So essentially, clk_round_rate() and clk_set_rate() are equivalent
except the former does not modify the clock hardware in any way.

Signed-off-by: Dario Binacchi <dariobin@libero.it>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Sean Anderson <seanga2@gmail.com>
2021-01-12 10:58:04 +05:30