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authorNicolas Ferre <nicolas.ferre@microchip.com>2019-01-29 17:49:12 +0100
committerUlf Hansson <ulf.hansson@linaro.org>2019-02-25 08:40:58 +0100
commitb1d14045f10a94577857338192f096db1a39f737 (patch)
treef3bacd62b07526325a21e1a6c5232b5cb7716093 /drivers/mmc/host/atmel-mci.c
parentd30ae056adb81e1d2b8b953efa74735a020b8e3b (diff)
downloadlinux-b1d14045f10a94577857338192f096db1a39f737.tar.bz2
mmc: atmel-mci: enable 8 bits buswidth support
This patch adds support for 8-bit buswidth. Relevant SDCR value modified. Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com> Reviewed-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/host/atmel-mci.c')
-rw-r--r--drivers/mmc/host/atmel-mci.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c
index 47189f9ed4e2..735aa5871358 100644
--- a/drivers/mmc/host/atmel-mci.c
+++ b/drivers/mmc/host/atmel-mci.c
@@ -1410,6 +1410,9 @@ static void atmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
case MMC_BUS_WIDTH_4:
slot->sdc_reg |= ATMCI_SDCBUS_4BIT;
break;
+ case MMC_BUS_WIDTH_8:
+ slot->sdc_reg |= ATMCI_SDCBUS_8BIT;
+ break;
}
if (ios->clock) {
@@ -2275,8 +2278,11 @@ static int atmci_init_slot(struct atmel_mci *host,
* use only one bit for data to prevent fifo underruns and overruns
* which will corrupt data.
*/
- if ((slot_data->bus_width >= 4) && host->caps.has_rwproof)
+ if ((slot_data->bus_width >= 4) && host->caps.has_rwproof) {
mmc->caps |= MMC_CAP_4_BIT_DATA;
+ if (slot_data->bus_width >= 8)
+ mmc->caps |= MMC_CAP_8_BIT_DATA;
+ }
if (atmci_get_version(host) < 0x200) {
mmc->max_segs = 256;