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mmc: sh_mmcif: Change maximum and minimum value of MMC clock

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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>
This commit is contained in:
Nobuhiro Iwamatsu 2014-12-03 17:57:01 +09:00 committed by Nobuhiro Iwamatsu
parent 21ea350385
commit 7a7eb983a4
2 changed files with 5 additions and 3 deletions
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5
drivers/mmc/sh_mmcif.c
View File

@ -579,8 +579,6 @@ static struct mmc_config sh_mmcif_cfg = {
.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 @@ int mmcif_mmc_init(void)
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);

3
drivers/mmc/sh_mmcif.h
View File

@ -199,7 +199,8 @@ struct sh_mmcif_regs {
#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