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mmc: arm_pl180_mmci: add clock support

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Allow to get and enable MMC related clock

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
This commit is contained in:
Patrice Chotard 2017-10-23 10:57:33 +02:00 committed by Tom Rini
parent 9035bb7432
commit 5f256fe71d
1 changed files with 14 additions and 2 deletions

16
drivers/mmc/arm_pl180_mmci.c
View File

@ -13,6 +13,7 @@
/* #define DEBUG */
#include "common.h"
#include <clk.h>
#include <errno.h>
#include <malloc.h>
#include <mmc.h>
@ -408,17 +409,28 @@ static int arm_pl180_mmc_probe(struct udevice *dev)
struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
struct mmc *mmc = &pdata->mmc;
struct pl180_mmc_host *host = mmc->priv;
struct clk clk;
u32 bus_width;
int ret;
ret = clk_get_by_index(dev, 0, &clk);
if (ret < 0)
return ret;
ret = clk_enable(&clk);
if (ret) {
dev_err(dev, "failed to enable clock\n");
return ret;
}
strcpy(host->name, "MMC");
host->pwr_init = INIT_PWR;
host->clkdiv_init = SDI_CLKCR_CLKDIV_INIT_V1 | SDI_CLKCR_CLKEN |
SDI_CLKCR_HWFC_EN;
host->voltages = VOLTAGE_WINDOW_SD;
host->caps = 0;
host->clock_in = MMC_CLOCK_MAX;
host->clock_min = MMC_CLOCK_MIN;
host->clock_in = clk_get_rate(&clk);
host->clock_min = host->clock_in / (2 * (SDI_CLKCR_CLKDIV_INIT_V1 + 1));
host->clock_max = dev_read_u32_default(dev, "max-frequency",
MMC_CLOCK_MAX);
host->version2 = dev_get_driver_data(dev);