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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>
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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>
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'ret' is known to be 0 here.
No error code is available, so just remove it from the error message.
Fixes: 921fc1838fb0 ("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>
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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>
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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>
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