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path: root/drivers/spi/spi-sprd.c
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2019-12-04spi: sprd: Fix the incorrect SPI registerHuanpeng Xin
The original code used an incorrect SPI register to initialize the SPI controller in sprd_spi_init_hw(), thus fix it. Fixes: e7d973a31c24 ("spi: sprd: Add SPI driver for Spreadtrum SC9860") Signed-off-by: Huanpeng Xin <huanpeng.xin@unisoc.com> Signed-off-by: Baolin Wang <baolin.wang7@gmail.com> Link: https://lore.kernel.org/r/b4f7f89ec0fdc595335687bfbd9f962213bc4a1d.1575443510.git.baolin.wang7@gmail.com Signed-off-by: Mark Brown <broonie@kernel.org>
2019-10-15spi: sprd: convert transfer word delay to spi_delay structAlexandru Ardelean
The Spreadtrum SPI driver is the only user of the `word_delay` field in the `spi_transfer` struct. This change converts the field to use the `spi_delay` struct. This also enforces the users to specify the delay unit to be `SPI_DELAY_UNIT_SCK`. Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com> Link: https://lore.kernel.org/r/20190926105147.7839-5-alexandru.ardelean@analog.com Signed-off-by: Mark Brown <broonie@kernel.org>
2019-08-02spi: Remove dev_err() usage after platform_get_irq()Stephen Boyd
We don't need dev_err() messages when platform_get_irq() fails now that platform_get_irq() prints an error message itself when something goes wrong. Let's remove these prints with a simple semantic patch. // <smpl> @@ expression ret; struct platform_device *E; @@ ret = ( platform_get_irq(E, ...) | platform_get_irq_byname(E, ...) ); if ( \( ret < 0 \| ret <= 0 \) ) { ( -if (ret != -EPROBE_DEFER) -{ ... -dev_err(...); -... } | ... -dev_err(...); ) ... } // </smpl> While we're here, remove braces on if statements that only have one statement (manually). Cc: Mark Brown <broonie@kernel.org> Cc: linux-spi@vger.kernel.org Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Stephen Boyd <swboyd@chromium.org> Link: https://lore.kernel.org/r/20190730181557.90391-42-swboyd@chromium.org Signed-off-by: Mark Brown <broonie@kernel.org>
2019-02-20Merge branch 'for-5.0' of ↵Mark Brown
https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi into spi-5.1
2019-02-13spi: sprd: Add a prefix for SPI DMA channel macrosBaolin Wang
Add a prefix for SPI DMA channel macros to avoid namespace conflicts, and no functional changes. Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Mark Brown <broonie@kernel.org>
2019-02-13spi: sprd: spi: sprd: Add DMA mode supportLanqing Liu
Add DMA mode support for the Spreadtrum SPI controller, and we will enable SPI interrupt to help to complete the SPI transfer work in DMA mode. Signed-off-by: Lanqing Liu <lanqing.liu@unisoc.com> Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Mark Brown <broonie@kernel.org>
2019-02-13spi: sprd: Add the SPI irq function for the SPI DMA modeLanqing Liu
The SPI irq event will use to complete the SPI work in the SPI DMA mode, so this patch is a preparation for the following DMA mode support. Moreover the SPI interrupt can be fired when removing the SPI controller, so we should make sure the SPI controller has stopped the queue in remove function before freeing the SPI irq. Signed-off-by: Lanqing Liu <lanqing.liu@unisoc.com> Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Mark Brown <broonie@kernel.org>
2019-01-15spi: sprd: Fix the error data length in SPI read-only modeLanqing Liu
In SPI read-only mode, we will always return the writing length, which is always the power of "bits_per_word", but the length unit using by users is byte. Thus this patch fixes the returning length by getting from read_bufs() function to get the correct length. Signed-off-by: Lanqing Liu <lanqing.liu@spreadtrum.com> Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Mark Brown <broonie@kernel.org>
2018-09-27spi: sprd: don't mark remove function as __exitArnd Bergmann
The __exit section is left out for built-in drivers, so a 'remove' callback must not be marked as such to avoid breaking when we unbind a device at runtime. This was pointed out by kbuild: `sprd_spi_remove' referenced in section `.data' of drivers/spi/spi-sprd.o: defined in discarded section `.exit.text' of drivers/spi/spi-sprd.o Fixes: e7d973a31c24 ("spi: sprd: Add SPI driver for Spreadtrum SC9860") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Mark Brown <broonie@kernel.org>
2018-08-28spi: sprd: Add SPI driver for Spreadtrum SC9860Lanqing Liu
This patch adds the SPI controller driver for Spreadtrum SC9860 platform. Signed-off-by: Lanqing Liu <lanqing.liu@spreadtrum.com> Signed-off-by: Baolin Wang <baolin.wang@linaro.org> Signed-off-by: Mark Brown <broonie@kernel.org>