[U-Boot] [PATCH] mmc: rockchip_sdhci: add clock init for mmc

Jaehoon Chung
2016-10-09T23:01:29Z

On 10/07/2016 06:23 PM, Kever Yang wrote:
> Init the clock rate to CONFIG_ROCKCHIP_SDHCI_MAX_FREQ with clock driver
> api.
>
> Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
> ---
>
> drivers/mmc/rockchip_sdhci.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/drivers/mmc/rockchip_sdhci.c b/drivers/mmc/rockchip_sdhci.c
> index c56e1a3..e787343 100644
> --- a/drivers/mmc/rockchip_sdhci.c
> +++ b/drivers/mmc/rockchip_sdhci.c
> @@ -12,6 +12,7 @@
> #include <libfdt.h>
> #include <malloc.h>
> #include <sdhci.h>
> +#include <clk.h>
>
> /* 400KHz is max freq for card ID etc. Use that as min */
> #define EMMC_MIN_FREQ 400000
> @@ -33,7 +34,10 @@ static int arasan_sdhci_probe(struct udevice *dev)
> struct rockchip_sdhc *prv = dev_get_priv(dev);
> struct sdhci_host *host = &prv->host;
> int ret;
> + struct clk clk;
>
> + ret = clk_get_by_index(dev, 0, &clk);

What purpose do you use "ret" value?

Best Regards,
Jaehoon Chung

> + clk_set_rate(&clk, CONFIG_ROCKCHIP_SDHCI_MAX_FREQ);
> host->quirks = SDHCI_QUIRK_WAIT_SEND_CMD;
>
> ret = sdhci_setup_cfg(&plat->cfg, host, CONFIG_ROCKCHIP_SDHCI_MAX_FREQ,
>