spi/ath79: add missing HIGH->LOW SCK transition
The 'ath79_spi_txrx_mode0' function does not set the SCK signal to LOW at the end of a word transfer. This causes communications errors with certain devices (e.g. the PCF2123 RTC chip). The patch ensures that the SCK signal will be LOW. Signed-off-by: Gabor Juhos <juhosg@openwrt.org> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
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@ -200,6 +200,8 @@ static u32 ath79_spi_txrx_mode0(struct spi_device *spi, unsigned nsecs,
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ath79_spi_delay(sp, nsecs);
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ath79_spi_wr(sp, AR71XX_SPI_REG_IOC, out | AR71XX_SPI_IOC_CLK);
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ath79_spi_delay(sp, nsecs);
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if (bits == 1)
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ath79_spi_wr(sp, AR71XX_SPI_REG_IOC, out);
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word <<= 1;
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}
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