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

PATCH New Yangbo Lu 2 participants 2 messages Sep 17, 2015 – Nov 2, 2015 MMC, SD and SDIO

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Yangbo Lu

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#0 lore raw

PATCH v2 4/4 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 <[email protected]>
---
 board/freescale/common/qixis.h | 3 +++
 drivers/mmc/fsl_esdhc.c        | 3 +++
 2 files changed, 6 insertions(+)
board/freescale/common/qixis.h +3 -0
index 450cd0d..0aa56a0 100644
@@ -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
drivers/mmc/fsl_esdhc.c +3 -0
index 639ec02..f400dc9 100644
@@ -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]);
Signature · 1 line
2.1.0.27.g96db324
#1 lore raw

PATCH v2 4/4 mmc: fsl_esdhc: enable EVDD automatic control for SD/MMC Legacy Adapter Card

Quoted 6 lines · 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 <[email protected]>

---

Applied to u-boot-mpc85xx, awaiting upstream. Thanks.

York