From: Patrice Chotard patrice.chotard@st.com
Allow to get and enable MMC related clock
Signed-off-by: Patrice Chotard patrice.chotard@st.com --- drivers/mmc/arm_pl180_mmci.c | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-)
diff --git a/drivers/mmc/arm_pl180_mmci.c b/drivers/mmc/arm_pl180_mmci.c index 6ee77b1..f060c64 100644 --- a/drivers/mmc/arm_pl180_mmci.c +++ b/drivers/mmc/arm_pl180_mmci.c @@ -13,6 +13,7 @@ /* #define DEBUG */
#include "common.h" +#include <clk.h> #include <errno.h> #include <malloc.h> #include <mmc.h> @@ -405,17 +406,28 @@ 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 = 48000000; - host->clock_min = 400000; + 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", 48000000); host->version2 = dev_get_driver_data(dev);