[U-Boot] [PATCH v2 2/2] mmc: rockchip: add clock init

[Jaehoon Chung <jh80.chung@samsung.com>]

Hi Kever,

On 07/29/2016 03:42 PM, Kever Yang wrote:
> Init clock for eMMC controller.

Sorry for too often requesting something.
If you add the commit msg in more detail, then it's more great.:)

"Initialize the maximum clock with CMU, before setting the rockchip sdhci host controller."

And when you send the patch, i recommend to use the prefix likes this.
"mmc: rockchip_sdhci: ..."

Because there are two controller for rockchip.(rockchip_dw_mmc and rockchip_sdhci)
If use the prefix, then other guys can know whether patch relevant to which driver.

Other things looks good to me. If you send the patch v3, then you can add with my reviewed tag for this patch.

Best Regards,
Jaehoon Chung

> 
> Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
> ---
> 
> Changes in v2:
> - update base on comments from Jaehoon Chung
> 
>  drivers/mmc/rockchip_sdhci.c | 11 ++++++++++-
>  1 file changed, 10 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/mmc/rockchip_sdhci.c b/drivers/mmc/rockchip_sdhci.c
> index 023c29b..fda3d45 100644
> --- a/drivers/mmc/rockchip_sdhci.c
> +++ b/drivers/mmc/rockchip_sdhci.c
> @@ -7,6 +7,7 @@
>   */
>  
>  #include <common.h>
> +#include <clk.h>
>  #include <dm.h>
>  #include <fdtdec.h>
>  #include <libfdt.h>
> @@ -32,15 +33,23 @@ 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;
> +	struct clk clk;
>  	int ret;
>  	u32 caps;
> +	ulong max_freq = CONFIG_ROCKCHIP_SDHCI_MAX_FREQ;
>  
>  	host->version = sdhci_readw(host, SDHCI_HOST_VERSION);
>  	host->quirks = SDHCI_QUIRK_WAIT_SEND_CMD;
>  
> +	ret = clk_get_by_index(dev, 0, &clk);
> +	if (ret < 0)
> +		debug("%s get clock fail\n", __func__);
> +	else
> +		max_freq = clk_set_rate(&clk, CONFIG_ROCKCHIP_SDHCI_MAX_FREQ);
> +
>  	caps = sdhci_readl(host, SDHCI_CAPABILITIES);
>  	ret = sdhci_setup_cfg(&plat->cfg, dev->name, host->bus_width,
> -			caps, CONFIG_ROCKCHIP_SDHCI_MAX_FREQ, EMMC_MIN_FREQ,
> +			caps, max_freq, EMMC_MIN_FREQ,
>  			host->version, host->quirks, 0);
>  
>  	host->mmc = &plat->mmc;
>