Re: [PATCH v3 04/12] mmc: mediatek: make hs400_tune_response only for mt8173

[Matthias Brugger]

On 10/10/2017 05:01 AM, Chaotian Jing wrote:
> the origin design of hs400_tune_response is for mt8173 because of
> mt8173 has a special design. for doing that, we add a new member
> "compatible", by now it's only for mt8173.
>
> Signed-off-by: Chaotian Jing <chaotian.jing@xxxxxxxxxxxx>
> ---

Looks good now:
Reviewed-by: Matthias Brugger <matthias.bgg@xxxxxxxxx>

>   drivers/mmc/host/mtk-sd.c | 11 +++++++++--
>   1 file changed, 9 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c
> index 643c795..ab2fbbb 100644
> --- a/drivers/mmc/host/mtk-sd.c
> +++ b/drivers/mmc/host/mtk-sd.c
> @@ -300,6 +300,7 @@ struct msdc_save_para {
>   
>   struct mtk_mmc_compatible {
>   	u8 clk_div_bits;
> +	bool hs400_tune; /* only used for MT8173 */
>   };
>   
>   struct msdc_tune_para {
> @@ -360,18 +361,22 @@ struct msdc_host {
>   
>   static const struct mtk_mmc_compatible mt8135_compat = {
>   	.clk_div_bits = 8,
> +	.hs400_tune = false,
>   };
>   
>   static const struct mtk_mmc_compatible mt8173_compat = {
>   	.clk_div_bits = 8,
> +	.hs400_tune = true,
>   };
>   
>   static const struct mtk_mmc_compatible mt2701_compat = {
>   	.clk_div_bits = 12,
> +	.hs400_tune = false,
>   };
>   
>   static const struct mtk_mmc_compatible mt2712_compat = {
>   	.clk_div_bits = 12,
> +	.hs400_tune = false,
>   };
>   
>   static const struct of_device_id msdc_of_ids[] = {
> @@ -666,7 +671,8 @@ static void msdc_set_mclk(struct msdc_host *host, unsigned char timing, u32 hz)
>   		       host->base + PAD_CMD_TUNE);
>   	}
>   
> -	if (timing == MMC_TIMING_MMC_HS400)
> +	if (timing == MMC_TIMING_MMC_HS400 &&
> +	    host->dev_comp->hs400_tune)
>   		sdr_set_field(host->base + PAD_CMD_TUNE,
>   			      MSDC_PAD_TUNE_CMDRRDLY,
>   			      host->hs400_cmd_int_delay);
> @@ -1594,7 +1600,8 @@ static int msdc_execute_tuning(struct mmc_host *mmc, u32 opcode)
>   	struct msdc_host *host = mmc_priv(mmc);
>   	int ret;
>   
> -	if (host->hs400_mode)
> +	if (host->hs400_mode &&
> +	    host->dev_comp->hs400_tune)
>   		ret = hs400_tune_response(mmc, opcode);
>   	else
>   		ret = msdc_tune_response(mmc, opcode);