[3/4] mmc: sdhci: Enable HS400 support if available in caps

[Ashok Reddy Soma]

HS400 is indicated in bit63 of capability register in few IP's.
Add a quirk to check this and add HS400 to host capabilities.

Signed-off-by: Ashok Reddy Soma <ashok.reddy.soma at amd.com>
---
 drivers/mmc/sdhci.c | 4 ++++
 include/sdhci.h     | 3 +++
 2 files changed, 7 insertions(+)

diff --git a/drivers/mmc/sdhci.c b/drivers/mmc/sdhci.c
index 181ab9b7cb..c6b250b9a1 100644
--- a/drivers/mmc/sdhci.c
+++ b/drivers/mmc/sdhci.c
@@ -995,6 +995,10 @@ int sdhci_setup_cfg(struct mmc_config *cfg, struct sdhci_host *host,
 		cfg->host_caps |= MMC_CAP(UHS_SDR50);
 	}
 
+	if ((host->quirks & SDHCI_QUIRK_CAPS_BIT63_FOR_HS400) &&
+	    (caps_1 & SDHCI_SUPPORT_HS400))
+		cfg->host_caps |= MMC_CAP(MMC_HS_400);
+
 	if (caps_1 & SDHCI_SUPPORT_DDR50)
 		cfg->host_caps |= MMC_CAP(UHS_DDR50);
 
diff --git a/include/sdhci.h b/include/sdhci.h
index 64a3d309da..70fefca2a9 100644
--- a/include/sdhci.h
+++ b/include/sdhci.h
@@ -189,6 +189,7 @@
 #define  SDHCI_SUPPORT_SDR50	0x00000001
 #define  SDHCI_SUPPORT_SDR104	0x00000002
 #define  SDHCI_SUPPORT_DDR50	0x00000004
+#define  SDHCI_SUPPORT_HS400	BIT(31)
 #define  SDHCI_USE_SDR50_TUNING	0x00002000
 
 #define  SDHCI_CLOCK_MUL_MASK	0x00FF0000
@@ -248,6 +249,8 @@
 #define SDHCI_QUIRK_USE_WIDE8		(1 << 8)
 #define SDHCI_QUIRK_NO_1_8_V		(1 << 9)
 #define SDHCI_QUIRK_SUPPORT_SINGLE	(1 << 10)
+/* Capability register bit-63 indicates HS400 support */
+#define SDHCI_QUIRK_CAPS_BIT63_FOR_HS400	BIT(11)
 
 /* to make gcc happy */
 struct sdhci_host;
-- 
2.17.1