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cros: exynos: add SPI support for cros_ec

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This patch adds SPI support for carrying out the cros_ec protocol.

Signed-off-by: Hung-ying Tyan <tyanh@chromium.org>
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Hung-ying Tyan 2013-05-15 18:27:30 +08:00 • committed by Tom Rini
parent 78764a4e11
commit f3424c554c
4 changed files with 200 additions and 0 deletions
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16
include/spi.h
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@ -247,4 +247,20 @@ static inline int spi_w8r8(struct spi_slave *slave, unsigned char byte)
return ret < 0 ? ret : din[1];
}
/**
* Set up a SPI slave for a particular device tree node
*
* This calls spi_setup_slave() with the correct bus number. Call
* spi_free_slave() to free it later.
*
* @param blob Device tree blob
* @param node SPI peripheral node to use
* @param cs Chip select to use
* @param max_hz Maximum SCK rate in Hz (0 for default)
* @param mode Clock polarity, clock phase and other parameters
* @return pointer to new spi_slave structure
*/
struct spi_slave *spi_setup_slave_fdt(const void *blob, int node,
unsigned int cs, unsigned int max_hz, unsigned int mode);
#endif /* _SPI_H_ */