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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>
This commit is contained in:
Nicolas Ferre 2019-01-29 17:49:12 +01:00 committed by Ulf Hansson
parent d30ae056ad
commit b1d14045f1
1 changed files with 7 additions and 1 deletions
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8
drivers/mmc/host/atmel-mci.c
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@ -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;