mmc: sdhci: add quirk for broken HS200 support

commit 13868bf20f2f2c305f96e23620b024e167d6f9cb upstream.

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>
Signed-off-by: Chris Ball <chris@printf.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index bd8a0982aec33ec99b95b97fbcbdd65dee642770..08c069da24842e285e14e4530653b050e2f45b5f 100644 (file)
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -3004,7 +3004,8 @@ 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 3e781b8c0be74dd76e658c4ba78ecbb72516e153..362927c48f978904d1eb86c57e34e5f267f93f10 100644 (file)
--- 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 */