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authorQipan Li <Qipan.Li@csr.com>2014-04-14 14:29:59 +0800
committerMark Brown <broonie@linaro.org>2014-04-14 21:03:34 +0100
commit6ee8a2f7d5e78700b6e64799b5e9976b21cfad79 (patch)
tree8b0eae032373d5e8369a732f279c0217574049b2 /drivers/spi
parent625227a4e916fa87f1dd84bde518ef403c3f708a (diff)
downloadop-kernel-dev-6ee8a2f7d5e78700b6e64799b5e9976b21cfad79.zip
op-kernel-dev-6ee8a2f7d5e78700b6e64799b5e9976b21cfad79.tar.gz
spi: sirf: make GPIO chipselect function work well
orignal GPIO chipslect is not standard because it don't take care to the chipselect signal: BITBANG_CS_ACTIVE and BITBANG_CS_INACTIVE. Signed-off-by: Qipan Li <Qipan.Li@csr.com> Signed-off-by: Barry Song <Baohua.Song@csr.com> Signed-off-by: Mark Brown <broonie@linaro.org>
Diffstat (limited to 'drivers/spi')
-rw-r--r--drivers/spi/spi-sirf.c11
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/spi/spi-sirf.c b/drivers/spi/spi-sirf.c
index 9b30743..67d8909 100644
--- a/drivers/spi/spi-sirf.c
+++ b/drivers/spi/spi-sirf.c
@@ -470,7 +470,16 @@ static void spi_sirfsoc_chipselect(struct spi_device *spi, int value)
writel(regval, sspi->base + SIRFSOC_SPI_CTRL);
} else {
int gpio = sspi->chipselect[spi->chip_select];
- gpio_direction_output(gpio, spi->mode & SPI_CS_HIGH ? 0 : 1);
+ switch (value) {
+ case BITBANG_CS_ACTIVE:
+ gpio_direction_output(gpio,
+ spi->mode & SPI_CS_HIGH ? 1 : 0);
+ break;
+ case BITBANG_CS_INACTIVE:
+ gpio_direction_output(gpio,
+ spi->mode & SPI_CS_HIGH ? 0 : 1);
+ break;
+ }
}
}
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