[U-Boot] [v2, 4/4] mmc: fsl_esdhc: enable EVDD automatic control for SD/MMC Legacy Adapter Card

[Yangbo Lu]

When detecting SDHC Adapter Card Type 2(SD/MMC Legacy Adapter Card), enable EVDD
automatic control via SDHC_VS. This could support SD card IO voltage switching
for UHS-1 speed mode.

Signed-off-by: Yangbo Lu <yangbo.lu at freescale.com>
---
 board/freescale/common/qixis.h | 3 +++
 drivers/mmc/fsl_esdhc.c        | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/board/freescale/common/qixis.h b/board/freescale/common/qixis.h
index 450cd0d..0aa56a0 100644
--- a/board/freescale/common/qixis.h
+++ b/board/freescale/common/qixis.h
@@ -125,10 +125,13 @@ void qixis_write_i2c(unsigned int reg, u8 value);
 #define QIXIS_ESDHC_ADAPTER_TYPE_MMC            0x5	/* MMC Card */
 #define QIXIS_ESDHC_ADAPTER_TYPE_SD             0x6	/* SD Card Rev2.0 3.0 */
 #define QIXIS_ESDHC_NO_ADAPTER                  0x7	/* No Card is Present*/
+
 #define QIXIS_SDCLKIN		0x08
 #define QIXIS_SDCLKOUT		0x02
 #define QIXIS_DAT5_6_7		0X02
 #define QIXIS_DAT4		0X01
+
+#define QIXIS_EVDD_BY_SDHC_VS	0x0c
 #endif
 
 #endif
diff --git a/drivers/mmc/fsl_esdhc.c b/drivers/mmc/fsl_esdhc.c
index 639ec02..f400dc9 100644
--- a/drivers/mmc/fsl_esdhc.c
+++ b/drivers/mmc/fsl_esdhc.c
@@ -752,6 +752,9 @@ void mmc_adapter_card_type_ident(void)
 		QIXIS_WRITE(brdcfg[5], value);
 		break;
 	case QIXIS_ESDHC_ADAPTER_TYPE_SDMMC_LEGACY:
+		value = QIXIS_READ(pwr_ctl[1]);
+		value |= QIXIS_EVDD_BY_SDHC_VS;
+		QIXIS_WRITE(pwr_ctl[1], value);
 		break;
 	case QIXIS_ESDHC_ADAPTER_TYPE_EMMC44:
 		value = QIXIS_READ(brdcfg[5]);
-- 
2.1.0.27.g96db324