Subject: [PATCH] PM / AVS: rockchip-io: add GRF and PMUGRF types to distinguish

From: [email-masked] (Heiko Stuebner)
Date: Sat, 30 Jan 2016 13:39:11 +0100

Hi David,

Am Samstag, 30. Januar 2016, 20:01:45 schrieb David Wu:
> As rk3368 contained two separated iodomain areas, this was
> determined to use which regmap base address.
> 
> Signed-off-by: David Wu <[email-masked]>

I don't think we need to specify this on a driver level. Both GRF areas are 
"General register files" only located in two separate power-domains.
So the rockchip,grf property should work for both. Especially as nothing 
keeps designers from introducing yet another GRF-area somewhere else ;-)

>>From when I started working on the rk3368, I still have a preliminary 
patches for that sitting here, so I've attached on how I envisoned that to 
work.

Heiko

> ---
>  drivers/power/avs/rockchip-io-domain.c | 32
> ++++++++++++++++++++++++-------- 1 file changed, 24 insertions(+), 8
> deletions(-)
> 
> diff --git a/drivers/power/avs/rockchip-io-domain.c
> b/drivers/power/avs/rockchip-io-domain.c index 8099456..b17aeb7 100644
> --- a/drivers/power/avs/rockchip-io-domain.c
> +++ b/drivers/power/avs/rockchip-io-domain.c
> @@ -47,6 +47,11 @@
>  #define RK3368_SOC_CON15_FLASH0		BIT(14)
>  #define RK3368_SOC_FLASH_SUPPLY_NUM	2
> 
> +enum rockchip_iodomain_grf_type {
> +	GRF,
> +	PMUGRF
> +};
> +
>  struct rockchip_iodomain;
> 
>  /**
> @@ -54,6 +59,7 @@ struct rockchip_iodomain;
>   */
>  struct rockchip_iodomain_soc_data {
>  	int grf_offset;
> +	enum rockchip_iodomain_grf_type type;
>  	const char *supply_names[MAX_SUPPLIES];
>  	void (*init)(struct rockchip_iodomain *iod);
>  };
> @@ -67,7 +73,7 @@ struct rockchip_iodomain_supply {
> 
>  struct rockchip_iodomain {
>  	struct device *dev;
> -	struct regmap *grf;
> +	struct regmap *base;
>  	struct rockchip_iodomain_soc_data *soc_data;
>  	struct rockchip_iodomain_supply supplies[MAX_SUPPLIES];
>  };
> @@ -86,7 +92,7 @@ static int rockchip_iodomain_write(struct
> rockchip_iodomain_supply *supply, /* apply hiword-mask */
>  	val |= (BIT(supply->idx) << 16);
> 
> -	ret = regmap_write(iod->grf, iod->soc_data->grf_offset, val);
> +	ret = regmap_write(iod->base, iod->soc_data->grf_offset, val);
>  	if (ret)
>  		dev_err(iod->dev, "Couldn't write to GRF\n");
> 
> @@ -157,7 +163,7 @@ static void rk3288_iodomain_init(struct
> rockchip_iodomain *iod) * instead of a special gpio.
>  	 */
>  	val = RK3288_SOC_CON2_FLASH0 | (RK3288_SOC_CON2_FLASH0 << 16);
> -	ret = regmap_write(iod->grf, RK3288_SOC_CON2, val);
> +	ret = regmap_write(iod->base, RK3288_SOC_CON2, val);
>  	if (ret < 0)
>  		dev_warn(iod->dev, "couldn't update flash0 ctrl\n");
>  }
> @@ -176,7 +182,7 @@ static void rk3368_iodomain_init(struct
> rockchip_iodomain *iod) * instead of a special gpio.
>  	 */
>  	val = RK3368_SOC_CON15_FLASH0 | (RK3368_SOC_CON15_FLASH0 << 16);
> -	ret = regmap_write(iod->grf, RK3368_SOC_CON15, val);
> +	ret = regmap_write(iod->base, RK3368_SOC_CON15, val);
>  	if (ret < 0)
>  		dev_warn(iod->dev, "couldn't update flash0 ctrl\n");
>  }
> @@ -187,6 +193,7 @@ static void rk3368_iodomain_init(struct
> rockchip_iodomain *iod) */
>  static const struct rockchip_iodomain_soc_data soc_data_rk3188 = {
>  	.grf_offset = 0x104,
> +	.type = GRF,
>  	.supply_names = {
>  		NULL,
>  		NULL,
> @@ -209,6 +216,7 @@ static const struct rockchip_iodomain_soc_data
> soc_data_rk3188 = {
> 
>  static const struct rockchip_iodomain_soc_data soc_data_rk3288 = {
>  	.grf_offset = 0x380,
> +	.type = GRF,
>  	.supply_names = {
>  		"lcdc",		/* LCDC_VDD */
>  		"dvp",		/* DVPIO_VDD */
> @@ -226,6 +234,7 @@ static const struct rockchip_iodomain_soc_data
> soc_data_rk3288 = {
> 
>  static const struct rockchip_iodomain_soc_data soc_data_rk3368 = {
>  	.grf_offset = 0x900,
> +	.type = GRF,
>  	.supply_names = {
>  		NULL,		/* reserved */
>  		"dvp",		/* DVPIO_VDD */
> @@ -242,6 +251,7 @@ static const struct rockchip_iodomain_soc_data
> soc_data_rk3368 = {
> 
>  static const struct rockchip_iodomain_soc_data soc_data_rk3368_pmu = {
>  	.grf_offset = 0x100,
> +	.type = PMUGRF,
>  	.supply_names = {
>  		NULL,
>  		NULL,
> @@ -293,10 +303,16 @@ static int rockchip_iodomain_probe(struct
> platform_device *pdev) match = of_match_node(rockchip_iodomain_match,
> np);
>  	iod->soc_data = (struct rockchip_iodomain_soc_data *)match->data;
> 
> -	iod->grf = syscon_regmap_lookup_by_phandle(np, "rockchip,grf");
> -	if (IS_ERR(iod->grf)) {
> -		dev_err(&pdev->dev, "couldn't find grf regmap\n");
> -		return PTR_ERR(iod->grf);
> +	if (iod->soc_data->type == PMUGRF)
> +		iod->base = syscon_regmap_lookup_by_phandle(
> +				np, "rockchip,pmugrf");
> +	else
> +		iod->base = syscon_regmap_lookup_by_phandle(
> +				np, "rockchip,grf");
> +	if (IS_ERR(iod->base)) {
> +		dev_err(&pdev->dev, "couldn't find %s regmap\n",
> +			(iod->soc_data->type == PMUGRF) ? "pmugrf" : "grf");
> +		return PTR_ERR(iod->base);
>  	}
> 
>  	for (i = 0; i < MAX_SUPPLIES; i++) {
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