mmc: fsl_esdhc: enable EVDD automatic control for SD/MMC Legacy Adapter Card
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@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
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 @@
#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 5c20627..c5054d6 100644
--- a/drivers/mmc/fsl_esdhc.c
+++ b/drivers/mmc/fsl_esdhc.c
@@ -753,6 +753,9 @@
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]);