Right now enable 1.2v IO voltage for SDHC is by using vqmmc.
Thus for the host which doesn't have vqmmc, or its vqmmc does
not support 1.2v, directly use MMC_CAP2_HS200 may cause HS200
failure.
So needs to check if vqmmc is able to support 1.2v. If it does
not support, disable 1.2v IO for HS200.
Signed-off-by: Chuanxiao Dong <chuanxiao.d...@intel.com>
---
drivers/mmc/host/sdhci.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index c026ec8..6b701e1 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -2999,8 +2999,12 @@ int sdhci_add_host(struct sdhci_host *host)
/* SD3.0: SDR104 is supported so (for eMMC) the caps2
* field can be promoted to support HS200.
*/
- if (!(host->quirks2 & SDHCI_QUIRK2_BROKEN_HS200))
+ if (!(host->quirks2 & SDHCI_QUIRK2_BROKEN_HS200)) {
mmc->caps2 |= MMC_CAP2_HS200;
+ if (!host->vqmmc || !regulator_is_supported_voltage
+ (host->vqmmc, 1100000, 1300000))
+ mmc->caps2 &= ~MMC_CAP2_HS200_1_2V_SDR;
+ }
} else if (caps[1] & SDHCI_SUPPORT_SDR50)
mmc->caps |= MMC_CAP_UHS_SDR50;
--
1.7.10.4
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