diff --git a/drivers/mmc/sh_mmcif.c b/drivers/mmc/sh_mmcif.c
index 3a2022c..76ba93b 100644
--- a/drivers/mmc/sh_mmcif.c
+++ b/drivers/mmc/sh_mmcif.c
@@ -596,7 +596,7 @@
 	host->clk = CONFIG_SH_MMCIF_CLK;
 
 	sh_mmcif_cfg.f_min = MMC_CLK_DIV_MIN(host->clk);
-	sh_mmcif_cfg.f_max = MMC_CLK_DIV_MAX;
+	sh_mmcif_cfg.f_max = MMC_CLK_DIV_MAX(host->clk);
 
 	mmc = mmc_create(&sh_mmcif_cfg, host);
 	if (mmc == NULL) {
diff --git a/drivers/mmc/sh_mmcif.h b/drivers/mmc/sh_mmcif.h
index 70034e2..4b6752f 100644
--- a/drivers/mmc/sh_mmcif.h
+++ b/drivers/mmc/sh_mmcif.h
@@ -199,8 +199,13 @@
 #define SOFT_RST_OFF		(0 << 31)
 
 #define CLKDEV_EMMC_DATA	52000000	/* 52MHz */
+#ifdef CONFIG_RMOBILE
+#define MMC_CLK_DIV_MIN(clk)	(clk / (1 << 9))
+#define MMC_CLK_DIV_MAX(clk)	(clk / (1 << 1))
+#else
 #define MMC_CLK_DIV_MIN(clk)	(clk / (1 << 8))
-#define MMC_CLK_DIV_MAX		CLKDEV_EMMC_DATA
+#define MMC_CLK_DIV_MAX(clk)	CLKDEV_EMMC_DATA
+#endif
 
 #define MMC_BUS_WIDTH_1		0
 #define MMC_BUS_WIDTH_4		2