[PATCH v3 07/20] mmc: am654_sdhci: Add support for writing to clkbuf_sel

[Jaehoon Chung]

On 1/21/21 9:40 PM, Aswath Govindraju wrote:
> From: Faiz Abbas <faiz_abbas at ti.com>
> 
> Add support for writing new clock buffer select property for both
> the am654x and j721e 4 bit IPs
> 
> Signed-off-by: Faiz Abbas <faiz_abbas at ti.com>
> Signed-off-by: Aswath Govindraju <a-govindraju at ti.com>

Reviewed-by: Jaehoon Chung <jh80.chung at samsung.com>

Best Regards,
Jaehoon Chung

> ---
>  drivers/mmc/am654_sdhci.c | 11 +++++++++++
>  1 file changed, 11 insertions(+)
> 
> diff --git a/drivers/mmc/am654_sdhci.c b/drivers/mmc/am654_sdhci.c
> index b82558254ebb..e86ef1a8b218 100644
> --- a/drivers/mmc/am654_sdhci.c
> +++ b/drivers/mmc/am654_sdhci.c
> @@ -48,6 +48,8 @@
>  #define SEL100_MASK		BIT(SEL100_SHIFT)
>  #define FREQSEL_SHIFT		8
>  #define FREQSEL_MASK		GENMASK(10, 8)
> +#define CLKBUFSEL_SHIFT		0
> +#define CLKBUFSEL_MASK		GENMASK(2, 0)
>  #define DLL_TRIM_ICP_SHIFT	4
>  #define DLL_TRIM_ICP_MASK	GENMASK(7, 4)
>  #define DR_TY_SHIFT		20
> @@ -92,6 +94,7 @@ struct am654_sdhci_plat {
>  	u32 trm_icp;
>  	u32 drv_strength;
>  	u32 strb_sel;
> +	u32 clkbuf_sel;
>  	u32 flags;
>  #define DLL_PRESENT	BIT(0)
>  #define IOMUX_PRESENT	BIT(1)
> @@ -295,6 +298,9 @@ static int am654_sdhci_set_ios_post(struct sdhci_host *host)
>  		am654_sdhci_setup_delay_chain(plat, mode);
>  	}
>  
> +	regmap_update_bits(plat->base, PHY_CTRL5, CLKBUFSEL_MASK,
> +			   plat->clkbuf_sel);
> +
>  	return 0;
>  }
>  
> @@ -395,6 +401,9 @@ static int j721e_4bit_sdhci_set_ios_post(struct sdhci_host *host)
>  	val = (1 << OTAPDLYENA_SHIFT) | (otap_del_sel << OTAPDLYSEL_SHIFT);
>  	regmap_update_bits(plat->base, PHY_CTRL4, mask, val);
>  
> +	regmap_update_bits(plat->base, PHY_CTRL5, CLKBUFSEL_MASK,
> +			   plat->clkbuf_sel);
> +
>  	return 0;
>  }
>  
> @@ -548,6 +557,8 @@ static int am654_sdhci_of_to_plat(struct udevice *dev)
>  		}
>  	}
>  
> +	dev_read_u32(dev, "ti,clkbuf-sel", &plat->clkbuf_sel);
> +
>  	ret = mmc_of_parse(dev, cfg);
>  	if (ret)
>  		return ret;
>