Most DM based SPI host controller drivers use SPI_XFER_BEGIN and
SPI_XFER_END flags to enable/disable slave chip select.
This patch extends MMC SPI driver to pass SPI_XFER_BEGIN flag when
MMC command is send at start and pass SPI_XFER_END flag using a
dummy transfer (of bitlen = 0) at the end of MMC command.
Suggested-by: Jagan Teki <ja...@amarulasolutions.com>
Signed-off-by: Anup Patel <anup.pa...@wdc.com>
---
drivers/mmc/mmc_spi.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/mmc/mmc_spi.c b/drivers/mmc/mmc_spi.c
index f3d687ae80..350812a04b 100644
--- a/drivers/mmc/mmc_spi.c
+++ b/drivers/mmc/mmc_spi.c
@@ -84,7 +84,7 @@ static int mmc_spi_sendcmd(struct udevice *dev,
cmdo[4] = cmdarg >> 8;
cmdo[5] = cmdarg;
cmdo[6] = (crc7(0, &cmdo[1], 5) << 1) | 0x01;
- ret = dm_spi_xfer(dev, sizeof(cmdo) * 8, cmdo, NULL, 0);
+ ret = dm_spi_xfer(dev, sizeof(cmdo) * 8, cmdo, NULL, SPI_XFER_BEGIN);
if (ret)
return ret;
@@ -360,6 +360,8 @@ static int dm_mmc_spi_request(struct udevice *dev, struct
mmc_cmd *cmd,
}
done:
+ dm_spi_xfer(dev, 0, NULL, NULL, SPI_XFER_END);
+
dm_spi_release_bus(dev);
return ret;
--
2.17.1
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