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7 Commits

Author SHA1 Message Date
Krishna Yarlagadda
ac982578e7
spi: tegra210-quad: use device_reset method 
Use device_reset api to replace duplicate code in driver to call
reset_control_get api with reset handle.

Signed-off-by: Krishna Yarlagadda <kyarlagadda@nvidia.com>
Link: https://lore.kernel.org/r/20220222175611.58051-2-kyarlagadda@nvidia.com
Signed-off-by: Mark Brown <broonie@kernel.org>
 2022-02-24 20:21:53 +00:00
Miaoqian Lin
47c3e06ed9
spi: tegra210-quad: Fix missin IRQ check in tegra_qspi_probe 
This func misses checking for platform_get_irq()'s call and may passes the
negative error codes to request_threaded_irq(), which takes unsigned IRQ #,
causing it to fail with -EINVAL, overriding an original error code.
Stop calling request_threaded_irq() with invalid IRQ #s.

Fixes: 921fc1838f ("spi: tegra210-quad: Add support for Tegra210 QSPI controller")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Link: https://lore.kernel.org/r/20220128165956.27821-1-linmq006@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
 2022-02-08 13:40:21 +00:00
Krishna Yarlagadda
f89d2cc396
spi: tegra210-quad: use devm call for cdata memory 
Use devm alloc call to allocate memory for spi controller data and
remove free calls from cleanup.

Signed-off-by: Krishna Yarlagadda <kyarlagadda@nvidia.com>
Link: https://lore.kernel.org/r/1637834152-32093-1-git-send-email-kyarlagadda@nvidia.com
Signed-off-by: Mark Brown <broonie@kernel.org>
 2021-11-26 13:24:39 +00:00
Dmitry Osipenko
134a72373f
spi: tegra210-quad: Put device into suspend on driver removal 
pm_runtime_disable() cancels all pending power requests, while they
should be completed for the Tegra SPI driver. Otherwise SPI clock won't
be disabled ever again because clk refcount will become unbalanced.
Enforce runtime PM suspension to put device into expected state before
driver is unbound and device's RPM state is reset by driver's core.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Link: https://lore.kernel.org/r/20211023225951.14253-2-digetx@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
 2021-10-26 20:03:59 +01:00
Christophe JAILLET
665a990fdb
spi: tegra210-quad: Fix an error message 
'ret' is known to be 0 here.
No error code is available, so just remove it from the error message.

Fixes: 921fc1838f ("spi: tegra210-quad: Add support for Tegra210 QSPI controller")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/r/b990c1bb5830196142c3d70e3e3c6c0245a7e75f.1620404705.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Mark Brown <broonie@kernel.org>
 2021-05-10 13:17:19 +01:00
Sowjanya Komatineni
6a8a8b5170
spi: tegra210-quad: Add support for hardware dummy cycles transfer 
Tegra Quad SPI controller hardware supports sending dummy bytes based
on programmed dummy clock cycles after the actual transfer bytes.

This patch adds this support of hardware dummy bytes transfer and
skips transfer of dummy bytes from the software.

For dummy cycles more than Tegra Quad SPI hardware maximum dummy
cycles limit, driver transfers dummy bytes from the software.

Signed-off-by: Sowjanya Komatineni <skomatineni@nvidia.com>
Link: https://lore.kernel.org/r/1608585459-17250-7-git-send-email-skomatineni@nvidia.com
Signed-off-by: Mark Brown <broonie@kernel.org>
 2021-01-06 13:09:32 +00:00
Sowjanya Komatineni
921fc1838f
spi: tegra210-quad: Add support for Tegra210 QSPI controller 
Tegra SoC has a Quad SPI controller starting from Tegra210.

This patch adds support for Tegra210 QSPI controller.

Signed-off-by: Sowjanya Komatineni <skomatineni@nvidia.com>
Link: https://lore.kernel.org/r/1608585459-17250-5-git-send-email-skomatineni@nvidia.com
Signed-off-by: Mark Brown <broonie@kernel.org>
 2021-01-06 13:09:30 +00:00