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 450cd0ddbd553b4a20b8a8ddb1e9dd751abee7b2..0aa56a090ed2e7bf65ca9204556b5322fadc88e4 100644 (file)
--- 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 5c20627c1c18da0c99a8dbc1db2bf856223732d2..c5054d66bdcda029f0485958c87bd5154ccee591 100644 (file)
--- a/drivers/mmc/fsl_esdhc.c
+++ b/drivers/mmc/fsl_esdhc.c
@@ -753,6 +753,9 @@ 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]);