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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>
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1 changed files with 10 additions and 1 deletions
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@ -470,7 +470,16 @@ static void spi_sirfsoc_chipselect(struct spi_device *spi, int value)
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writel(regval, sspi->base + SIRFSOC_SPI_CTRL);
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} else {
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int gpio = sspi->chipselect[spi->chip_select];
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gpio_direction_output(gpio, spi->mode & SPI_CS_HIGH ? 0 : 1);
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switch (value) {
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case BITBANG_CS_ACTIVE:
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gpio_direction_output(gpio,
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spi->mode & SPI_CS_HIGH ? 1 : 0);
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break;
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case BITBANG_CS_INACTIVE:
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gpio_direction_output(gpio,
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spi->mode & SPI_CS_HIGH ? 0 : 1);
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break;
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}
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}
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}
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