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mmc: rockchip_sdhci: add clock init for mmc

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Init the clock rate to max-frequency from dts with clock driver api.

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
This commit is contained in:
Kever Yang 2016-12-28 11:32:35 +08:00 committed by Simon Glass
parent 1a58146085
commit 39fbb56f84
1 changed files with 17 additions and 2 deletions
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19
drivers/mmc/rockchip_sdhci.c
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@ -12,7 +12,9 @@
#include <libfdt.h>
#include <malloc.h>
#include <sdhci.h>
#include <clk.h>
DECLARE_GLOBAL_DATA_PTR;
/* 400KHz is max freq for card ID etc. Use that as min */
#define EMMC_MIN_FREQ 400000
@ -32,11 +34,24 @@ static int arasan_sdhci_probe(struct udevice *dev)
struct rockchip_sdhc_plat *plat = dev_get_platdata(dev);
struct rockchip_sdhc *prv = dev_get_priv(dev);
struct sdhci_host *host = &prv->host;
int ret;
int max_frequency, ret;
struct clk clk;
max_frequency = fdtdec_get_int(gd->fdt_blob, dev->of_offset,
"max-frequency", 0);
ret = clk_get_by_index(dev, 0, &clk);
if (!ret) {
ret = clk_set_rate(&clk, max_frequency);
if (IS_ERR_VALUE(ret))
printf("%s clk set rate fail!\n", __func__);
} else {
printf("%s fail to get clk\n", __func__);
}
host->quirks = SDHCI_QUIRK_WAIT_SEND_CMD;
ret = sdhci_setup_cfg(&plat->cfg, host, CONFIG_ROCKCHIP_SDHCI_MAX_FREQ,
ret = sdhci_setup_cfg(&plat->cfg, host, max_frequency,
EMMC_MIN_FREQ);
host->mmc = &plat->mmc;