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

[Jaehoon Chung]

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 at 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,
>