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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>
hifive-unleashed-5.1
Qipan Li 2014-04-14 14:29:59 +08:00 committed by Mark Brown
parent 625227a4e9
commit 6ee8a2f7d5
1 changed files with 10 additions and 1 deletions
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11
drivers/spi/spi-sirf.c
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@ -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;
}
}
}