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mmc: fsl_esdhc: enable EVDD automatic control for SD/MMC Legacy Adapter Card

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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>
This commit is contained in:
Yangbo Lu 2015-09-17 10:27:48 +08:00 committed by York Sun
parent 12486f3841
commit bf50be835e
2 changed files with 6 additions and 0 deletions
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3
board/freescale/common/qixis.h
View File

@ -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

3
drivers/mmc/fsl_esdhc.c
View File

@ -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]);