mmc: sh_mmcif: Change maximum and minimum value of MMC clock
Maximum value and the minimum value of clock for sh_mmcif instead by
base of MMC clock. This removes fixed clock, make the changes to be calculated
according to environment.
Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
diff --git a/drivers/mmc/sh_mmcif.c b/drivers/mmc/sh_mmcif.c
index 8f386e2..3a2022c 100644
--- a/drivers/mmc/sh_mmcif.c
+++ b/drivers/mmc/sh_mmcif.c
@@ -579,8 +579,6 @@
.host_caps = MMC_MODE_HS | MMC_MODE_HS_52MHz | MMC_MODE_4BIT |
MMC_MODE_8BIT | MMC_MODE_HC,
.voltages = MMC_VDD_32_33 | MMC_VDD_33_34,
- .f_min = CLKDEV_MMC_INIT,
- .f_max = CLKDEV_EMMC_DATA,
.b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT,
};
@@ -597,6 +595,9 @@
host->regs = (struct sh_mmcif_regs *)CONFIG_SH_MMCIF_ADDR;
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;
+
mmc = mmc_create(&sh_mmcif_cfg, host);
if (mmc == NULL) {
free(host);
diff --git a/drivers/mmc/sh_mmcif.h b/drivers/mmc/sh_mmcif.h
index bd6fbf7..70034e2 100644
--- a/drivers/mmc/sh_mmcif.h
+++ b/drivers/mmc/sh_mmcif.h
@@ -199,7 +199,8 @@
#define SOFT_RST_OFF (0 << 31)
#define CLKDEV_EMMC_DATA 52000000 /* 52MHz */
-#define CLKDEV_MMC_INIT 400000 /* 100 - 400 KHz */
+#define MMC_CLK_DIV_MIN(clk) (clk / (1 << 8))
+#define MMC_CLK_DIV_MAX CLKDEV_EMMC_DATA
#define MMC_BUS_WIDTH_1 0
#define MMC_BUS_WIDTH_4 2