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Commit b1d14045 authored by Nicolas Ferre's avatar Nicolas Ferre Committed by Ulf Hansson
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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: default avatarNicolas Ferre <nicolas.ferre@microchip.com>
Reviewed-by: default avatarAlexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent d30ae056

drivers/mmc/host/atmel-mci.c

+7 −1
Original line number Diff line number Diff line
@@ -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;