[PATCH v6 2/2] mmc: sdhci: Add support to disable SDR104/SDR50/DDR50 based on capability register 0.

[Suman Tripathi]

The sdhci framework disables SDR104/SDR50/DDR50 based on only quirk.
This patch adds the support to disable SDR104/SDR50/DDR50 based on
reading the capability register 0.

Signed-off-by: Suman Tripathi <stripathi at apm.com>
---
 drivers/mmc/host/sdhci.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index c80287a..e024c64 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -3199,7 +3199,8 @@ int sdhci_add_host(struct sdhci_host *host)
 		}
 	}

-	if (host->quirks2 & SDHCI_QUIRK2_NO_1_8_V)
+	if (host->quirks2 & SDHCI_QUIRK2_NO_1_8_V ||
+	    !(caps[0] & SDHCI_CAN_VDD_180))
 		caps[1] &= ~(SDHCI_SUPPORT_SDR104 | SDHCI_SUPPORT_SDR50 |
 		       SDHCI_SUPPORT_DDR50);

--
1.8.2.1