diff --git a/[refs] b/[refs]
index 4cb180784af0..66e70d0b2fd0 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 1e5df7525d0705dfbfded0c10a7b87b0a754a35d
+refs/heads/master: c08592698534f390afe726c38301aa8f1620c361
diff --git a/trunk/drivers/mmc/host/sdhci-of.c b/trunk/drivers/mmc/host/sdhci-of.c
index 2b0756934f49..3439fc118904 100644
--- a/trunk/drivers/mmc/host/sdhci-of.c
+++ b/trunk/drivers/mmc/host/sdhci-of.c
@@ -48,6 +48,8 @@ struct sdhci_of_host {
 #define ESDHC_CLOCK_HCKEN	0x00000002
 #define ESDHC_CLOCK_IPGEN	0x00000001
 
+#define ESDHC_HOST_CONTROL_RES	0x05
+
 static u32 esdhc_readl(struct sdhci_host *host, int reg)
 {
 	return in_be32(host->ioaddr + reg);
@@ -109,6 +111,10 @@ static void esdhc_writeb(struct sdhci_host *host, u8 val, int reg)
 	int base = reg & ~0x3;
 	int shift = (reg & 0x3) * 8;
 
+	/* Prevent SDHCI core from writing reserved bits (e.g. HISPD). */
+	if (reg == SDHCI_HOST_CONTROL)
+		val &= ~ESDHC_HOST_CONTROL_RES;
+
 	clrsetbits_be32(host->ioaddr + base , 0xff << shift, val << shift);
 }