mmc: sdhci: add quirk for broken HS200 support

This patch defines a quirk for platforms unable to enable HS200 support.

Signed-off-by: David Cohen <david.a.cohen@linux.intel.com>
Reviewed-by: Chuanxiao Dong <chuanxiao.dong@intel.com>
Acked-by: Dong Aisheng <b29396@freescale.com>
Cc: stable <stable@vger.kernel.org> # [3.13]
Signed-off-by: Chris Ball <chris@printf.net>

2 files changed, 4 insertions, 1 deletions

diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index cc00bed3e200..ec3eb30845c7 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -3016,7 +3016,8 @@ 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.
                  */
-                mmc->caps2 |= MMC_CAP2_HS200;
+                if (!(host->quirks2 & SDHCI_QUIRK2_BROKEN_HS200))
+                        mmc->caps2 |= MMC_CAP2_HS200;
         } else if (caps[1] & SDHCI_SUPPORT_SDR50)
                 mmc->caps |= MMC_CAP_UHS_SDR50;
 
diff --git a/include/linux/mmc/sdhci.h b/include/linux/mmc/sdhci.h
index 3e781b8c0be7..362927c48f97 100644
--- a/include/linux/mmc/sdhci.h
+++ b/include/linux/mmc/sdhci.h
@@ -98,6 +98,8 @@ struct sdhci_host {
 #define SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON               (1<<4)
 /* Controller has a non-standard host control register */
 #define SDHCI_QUIRK2_BROKEN_HOST_CONTROL                (1<<5)
+/* Controller does not support HS200 */
+#define SDHCI_QUIRK2_BROKEN_HS200                       (1<<6)
 
         int irq;                /* Device IRQ */
         void __iomem *ioaddr;   /* Mapped address */