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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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22
drivers/spi/exynos_spi.c
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@@ -465,6 +465,28 @@ static int process_nodes(const void *blob, int node_list[], int count)
}
#endif
/**
* Set up a new SPI slave for an fdt node
*
* @param blob Device tree blob
* @param node SPI peripheral node to use
* @return 0 if ok, -1 on error
*/
struct spi_slave *spi_setup_slave_fdt(const void *blob, int node,
unsigned int cs, unsigned int max_hz, unsigned int mode)
{
struct spi_bus *bus;
unsigned int i;
for (i = 0, bus = spi_bus; i < bus_count; i++, bus++) {
if (bus->node == node)
return spi_setup_slave(i, cs, max_hz, mode);
}
debug("%s: Failed to find bus node %d\n", __func__, node);
return NULL;
}
/* Sadly there is no error return from this function */
void spi_init(void)
{