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mmc: mmc_spi: Use SPI_XFER_BEGIN and SPI_XFER_END flags

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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 <jagan@amarulasolutions.com>
Signed-off-by: Anup Patel <anup.patel@wdc.com>
Tested-by: Sagar Kadam <sagar.kadam@sifive.com>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>
This commit is contained in:
Anup Patel 2019-07-17 04:23:38 +00:00 committed by Jagan Teki
parent 733391e84b
commit a706029410
1 changed files with 3 additions and 1 deletions
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4
drivers/mmc/mmc_spi.c
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@ -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;