linux-toradex.git/drivers/spi/spi-davinci.c, branch v6.11

spi: davinci: Unset POWERDOWN bit when releasing resources

2024-07-01T12:12:18+00:00

On the OMAPL138, the SPI reference clock is provided by the Power and
Sleep Controller (PSC). The PSC's datasheet says that 'some peripherals
have special programming requirements and additional recommended steps
you must take before you can invoke the PSC module state transition'. I
didn't find more details in documentation but it appears that PSC needs
the SPI to clear the POWERDOWN bit before disabling the clock. Indeed,
when this bit is set, the PSC gets stuck in transitions from enable to
disable state.

Clear the POWERDOWN bit when releasing driver's resources

Signed-off-by: Bastien Curutchet 
Link: https://patch.msgid.link/20240624071745.17409-1-bastien.curutchet@bootlin.com
Signed-off-by: Mark Brown

spi: bitbang: Follow renaming of SPI "master" to "controller"

2024-02-08T11:54:48+00:00

In commit 8caab75fd2c2 ("spi: Generalize SPI "master" to "controller"")
some functions and struct members were renamed. To not break all drivers
compatibility macros were provided.

To be able to remove these compatibility macros push the renaming into
the SPI bitbang controller drivers.

Acked-by: Jonathan Cameron 
Signed-off-by: Uwe Kleine-König 
Link: https://lore.kernel.org/r/f7f949feb803acb8bea75798f41371a13287f4e8.1707324794.git.u.kleine-koenig@pengutronix.de
Signed-off-by: Mark Brown

spi: davinci: Use helper function devm_clk_get_enabled()

2023-09-11T00:32:00+00:00

Since commit 7ef9651e9792 ("clk: Provide new devm_clk helpers for prepared
and enabled clocks"), devm_clk_get() and clk_prepare_enable() can now be
replaced by devm_clk_get_enabled() when driver enables (and possibly
prepares) the clocks for the whole lifetime of the device. Moreover, it is
no longer necessary to unprepare and disable the clocks explicitly.

Reviewed-by: Jonathan Cameron 
Signed-off-by: Li Zetao 
Link: https://lore.kernel.org/r/20230823133938.1359106-11-lizetao1@huawei.com
Signed-off-by: Mark Brown

spi: davinci: switch to use modern name

2023-08-07T13:38:31+00:00

Change legacy name master to modern name host or controller.

No functional changed.

Signed-off-by: Yang Yingliang 
Link: https://lore.kernel.org/r/20230728093221.3312026-18-yangyingliang@huawei.com
Signed-off-by: Mark Brown

spi: Explicitly include correct DT includes

2023-07-14T19:53:00+00:00

The DT of_device.h and of_platform.h date back to the separate
of_platform_bus_type before it as merged into the regular platform bus.
As part of that merge prepping Arm DT support 13 years ago, they
"temporarily" include each other. They also include platform_device.h
and of.h. As a result, there's a pretty much random mix of those include
files used throughout the tree. In order to detangle these headers and
replace the implicit includes with struct declarations, users need to
explicitly include the correct includes.

Signed-off-by: Rob Herring 
Link: https://lore.kernel.org/r/20230714174955.4064174-1-robh@kernel.org
Signed-off-by: Mark Brown

spi: Header and core clean up and refactoring

2023-07-12T11:44:34+00:00

Merge series from Andy Shevchenko :

Various cleanups and refactorings of the SPI header and core parts
united in a single series. It also touches drivers under SPI subsystem
folder on the pure renaming purposes of some constants.

No functional change intended.

spi: Rename SPI_MASTER_GPIO_SS to SPI_CONTROLLER_GPIO_SS

2023-07-11T13:12:56+00:00

Rename SPI_MASTER_GPIO_SS to SPI_CONTROLLER_GPIO_SS and
convert the users to SPI_CONTROLLER_GPIO_SS to follow
the new naming shema.

Signed-off-by: Andy Shevchenko 
Link: https://lore.kernel.org/r/20230710154932.68377-14-andriy.shevchenko@linux.intel.com
Reviewed-by: Serge Semin 
Signed-off-by: Mark Brown

spi: Get rid of old SPI_MASTER_MUST_TX & SPI_MASTER_MUST_RX

2023-07-11T12:41:25+00:00

Convert the users from SPI_MASTER_MUST_TX and/or SPI_MASTER_MUST_RX
to SPI_CONTROLLER_MUST_TX and/or SPI_CONTROLLER_MUST_RX respectively
and kill the not used anymore definitions.

Signed-off-by: Andy Shevchenko 
Link: https://lore.kernel.org/r/20230710154932.68377-13-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown

spi: davinci: Use devm_platform_get_and_ioremap_resource()

2023-07-09T21:51:37+00:00

Convert platform_get_resource(), devm_ioremap_resource() to a single
call to devm_platform_get_and_ioremap_resource(), as this is exactly
what this function does.

Signed-off-by: Yangtao Li 
Link: https://lore.kernel.org/r/20230706032727.9180-2-frank.li@vivo.com
Signed-off-by: Mark Brown

spi: Replace all spi->chip_select and spi->cs_gpiod references with function call

2023-03-11T12:34:01+00:00

Supporting multi-cs in spi drivers would require the chip_select & cs_gpiod
members of struct spi_device to be an array. But changing the type of these
members to array would break the spi driver functionality. To make the
transition smoother introduced four new APIs to get/set the
spi->chip_select & spi->cs_gpiod and replaced all spi->chip_select and
spi->cs_gpiod references with get or set API calls.
While adding multi-cs support in further patches the chip_select & cs_gpiod
members of the spi_device structure would be converted to arrays & the
"idx" parameter of the APIs would be used as array index i.e.,
spi->chip_select[idx] & spi->cs_gpiod[idx] respectively.

Signed-off-by: Amit Kumar Mahapatra 
Acked-by: Heiko Stuebner  # Rockchip drivers
Reviewed-by: Michal Simek 
Reviewed-by: Cédric Le Goater  # Aspeed driver
Reviewed-by: Dhruva Gole  # SPI Cadence QSPI
Reviewed-by: Patrice Chotard  # spi-stm32-qspi
Acked-by: William Zhang  # bcm63xx-hsspi driver
Reviewed-by: Serge Semin  # DW SSI part
Link: https://lore.kernel.org/r/167847070432.26.15076794204368669839@mailman-core.alsa-project.org
Signed-off-by: Mark Brown