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authorLinus Walleij <linus.walleij@linaro.org>2019-01-07 16:51:56 +0100
committerMark Brown <broonie@kernel.org>2019-01-09 12:42:18 +0000
commit9400c41e77b8f1f9c711b08a6c79bdbc5681fb00 (patch)
treeba0ccbe34e4898631308066fd54c46d1395ba0cb /drivers/spi/spi-dw.c
parent101a68e74fe089b975c407f1bc9359882b05489a (diff)
spi: dw: Convert to use CS GPIO descriptors
This converts the DesignWare (dw) SPI master driver to use GPIO descriptors for chip select handling. This driver has a duplicate DT parser in addition to the one in the core, sets up the line as non-asserted and relies on the core to drive the GPIOs. It is a pretty straight-forward conversion. Cc: Talel Shenhar <talel@amazon.com> Cc: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com> Cc: Alexandre Belloni <alexandre.belloni@bootlin.com> Cc: Linuxarm <linuxarm@huawei.com> Tested-by: Jay Fang <f.fangjian@huawei.com> Reviewed-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi/spi-dw.c')
-rw-r--r--drivers/spi/spi-dw.c9
1 files changed, 1 insertions, 8 deletions
diff --git a/drivers/spi/spi-dw.c b/drivers/spi/spi-dw.c
index a945fad3db62..f54b498001a9 100644
--- a/drivers/spi/spi-dw.c
+++ b/drivers/spi/spi-dw.c
@@ -20,7 +20,6 @@
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/spi/spi.h>
-#include <linux/gpio.h>
#include "spi-dw.h"
@@ -426,13 +425,6 @@ static int dw_spi_setup(struct spi_device *spi)
chip->tmode = SPI_TMOD_TR;
- if (gpio_is_valid(spi->cs_gpio)) {
- ret = gpio_direction_output(spi->cs_gpio,
- !(spi->mode & SPI_CS_HIGH));
- if (ret)
- return ret;
- }
-
return 0;
}
@@ -497,6 +489,7 @@ int dw_spi_add_host(struct device *dev, struct dw_spi *dws)
goto err_free_master;
}
+ master->use_gpio_descriptors = true;
master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_LOOP;
master->bits_per_word_mask = SPI_BPW_RANGE_MASK(4, 16);
master->bus_num = dws->bus_num;