Subject: [PATCH 19/23] mmc: sdhci-esdhc-imx: enable hw auto retuning for MAN_TUNING

From: [email-masked] (Adrian Hunter)
Date: Tue, 10 May 2016 14:24:40 +0300

On 15/04/16 20:29, Dong Aisheng wrote:
> Indicating hw auto retuning support for mx6qdl in the fake caps_1
> register and enable auto retuning in post_tuning process after
> tuning completes.
> 
> Signed-off-by: Dong Aisheng <[email-masked]>

I presume this patch should wait for patch 17, but nevertheless:

Acked-by: Adrian Hunter <[email-masked]>

> ---
>  drivers/mmc/host/sdhci-esdhc-imx.c | 11 ++++++++---
>  1 file changed, 8 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c
> index a582a83..07b1144 100644
> --- a/drivers/mmc/host/sdhci-esdhc-imx.c
> +++ b/drivers/mmc/host/sdhci-esdhc-imx.c
> @@ -301,7 +301,8 @@ static u32 esdhc_readl_le(struct sdhci_host *host, int reg)
>  				/* imx6q/dl does not have cap_1 register, fake one */
>  				val = SDHCI_SUPPORT_DDR50 | SDHCI_SUPPORT_SDR104
>  					| SDHCI_SUPPORT_SDR50
> -					| SDHCI_USE_SDR50_TUNING;
> +					| SDHCI_USE_SDR50_TUNING
> +					| (SDHCI_TUNING_MODE_3 << SDHCI_RETUNING_MODE_SHIFT);
>  
>  			if (imx_data->socdata->flags & ESDHC_FLAG_HS400)
>  				val |= SDHCI_SUPPORT_HS400;
> @@ -471,10 +472,13 @@ static void esdhc_writew_le(struct sdhci_host *host, u16 val, int reg)
>  		writel(new_val, host->ioaddr + ESDHC_VENDOR_SPEC);
>  		if (imx_data->socdata->flags & ESDHC_FLAG_MAN_TUNING) {
>  			new_val = readl(host->ioaddr + ESDHC_MIX_CTRL);
> -			if (val & SDHCI_CTRL_TUNED_CLK)
> +			if (val & SDHCI_CTRL_TUNED_CLK) {
>  				new_val |= ESDHC_MIX_CTRL_SMPCLK_SEL;
> -			else
> +				new_val |= ESDHC_MIX_CTRL_AUTO_TUNE_EN;
> +			} else {
>  				new_val &= ~ESDHC_MIX_CTRL_SMPCLK_SEL;
> +				new_val &= ~ESDHC_MIX_CTRL_AUTO_TUNE_EN;
> +			}
>  			writel(new_val , host->ioaddr + ESDHC_MIX_CTRL);
>  		} else if (imx_data->socdata->flags & ESDHC_FLAG_STD_TUNING) {
>  			u32 v = readl(host->ioaddr + SDHCI_ACMD12_ERR);
> @@ -760,6 +764,7 @@ static void esdhc_post_tuning(struct sdhci_host *host)
>  
>  	reg = readl(host->ioaddr + ESDHC_MIX_CTRL);
>  	reg &= ~ESDHC_MIX_CTRL_EXE_TUNE;
> +	reg |= ESDHC_MIX_CTRL_AUTO_TUNE_EN;
>  	writel(reg, host->ioaddr + ESDHC_MIX_CTRL);
>  }
>  
>