[PATCH] soc: rockchip: io-domain: add rk3568 support

[Heiko Stübner]

Hi Jay,

Am Donnerstag, 27. Mai 2021, 09:29:17 CEST schrieb Jianqun Xu:
> The io-domain registers on RK3568 SoCs have three separated bits to
> enable/disable the 1.8v/2.5v/3.3v power.
> 
> This patch make the write to be a operation, allow rk3568 uses a private
> register set function.
> 
> Since the 2.5v is not used on RK3568, so the driver only set
> 1.8v [enable] + 3.3v [disable] for 1.8v mode
> 1.8v [disable] + 3.3v [enable] for 3.3v mode
> 
> There is not register order requirement which has been cleared by our IC
> team.
> 
> Signed-off-by: Jianqun Xu <jay.xu at rock-chips.com>

can you add a separate patch that adds the necessary compatible to the
dt-binding please?

One more thing below.

> ---
>  drivers/soc/rockchip/io-domain.c | 75 +++++++++++++++++++++++++++++++-
>  1 file changed, 73 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/soc/rockchip/io-domain.c b/drivers/soc/rockchip/io-domain.c
> index cf8182fc3642..32b3bd645d56 100644
> --- a/drivers/soc/rockchip/io-domain.c
> +++ b/drivers/soc/rockchip/io-domain.c
> @@ -51,6 +51,10 @@
>  #define RK3399_PMUGRF_CON0_VSEL		BIT(8)
>  #define RK3399_PMUGRF_VSEL_SUPPLY_NUM	9
>  
> +#define RK3568_PMU_GRF_IO_VSEL0		(0x0140)
> +#define RK3568_PMU_GRF_IO_VSEL1		(0x0144)
> +#define RK3568_PMU_GRF_IO_VSEL2		(0x0148)
> +
>  struct rockchip_iodomain;
>  
>  struct rockchip_iodomain_soc_data {
> @@ -71,8 +75,51 @@ struct rockchip_iodomain {
>  	struct regmap *grf;
>  	const struct rockchip_iodomain_soc_data *soc_data;
>  	struct rockchip_iodomain_supply supplies[MAX_SUPPLIES];
> +	int (*write)(struct rockchip_iodomain_supply *supply, int uV);
>  };
>  
> +static int rk3568_pmu_iodomain_write(struct rockchip_iodomain_supply *supply,
> +				     int uV)
> +{
> +	struct rockchip_iodomain *iod = supply->iod;
> +	u32 is_3v3 = uV > MAX_VOLTAGE_1_8;
> +	u32 val0, val1;
> +	int b;
> +
> +	switch (supply->idx) {
> +	case 0: /* pmuio1 */
> +		break;
> +	case 1: /* pmuio2 */
> +		b = supply->idx;
> +		val0 = BIT(16 + b) | (is_3v3 ? 0 : BIT(b));
> +		b = supply->idx + 4;
> +		val1 = BIT(16 + b) | (is_3v3 ? BIT(b) : 0);
> +
> +		regmap_write(iod->grf, RK3568_PMU_GRF_IO_VSEL2, val0);
> +		regmap_write(iod->grf, RK3568_PMU_GRF_IO_VSEL2, val1);
> +		break;
> +	case 3: /* vccio2 */
> +		break;
> +	case 2: /* vccio1 */
> +	case 4: /* vccio3 */
> +	case 5: /* vccio4 */
> +	case 6: /* vccio5 */
> +	case 7: /* vccio6 */
> +	case 8: /* vccio7 */
> +		b = supply->idx - 1;
> +		val0 = BIT(16 + b) | (is_3v3 ? 0 : BIT(b));
> +		val1 = BIT(16 + b) | (is_3v3 ? BIT(b) : 0);
> +
> +		regmap_write(iod->grf, RK3568_PMU_GRF_IO_VSEL0, val0);
> +		regmap_write(iod->grf, RK3568_PMU_GRF_IO_VSEL1, val1);
> +		break;
> +	default:
> +		return -EINVAL;
> +	};
> +
> +	return 0;
> +}
> +
>  static int rockchip_iodomain_write(struct rockchip_iodomain_supply *supply,
>  				   int uV)
>  {
> @@ -136,7 +183,7 @@ static int rockchip_iodomain_notify(struct notifier_block *nb,
>  			return NOTIFY_BAD;
>  	}
>  
> -	ret = rockchip_iodomain_write(supply, uV);
> +	ret = supply->iod->write(supply, uV);
>  	if (ret && event == REGULATOR_EVENT_PRE_VOLTAGE_CHANGE)
>  		return NOTIFY_BAD;
>  
> @@ -398,6 +445,21 @@ static const struct rockchip_iodomain_soc_data soc_data_rk3399_pmu = {
>  	.init = rk3399_pmu_iodomain_init,
>  };
>  
> +static const struct rockchip_iodomain_soc_data soc_data_rk3568_pmu = {
> +	.grf_offset = 0x140,
> +	.supply_names = {
> +		"pmuio1",
> +		"pmuio2",
> +		"vccio1",
> +		"vccio2",
> +		"vccio3",
> +		"vccio4",
> +		"vccio5",
> +		"vccio6",
> +		"vccio7",
> +	},

+	.write = rk3568_iodomain_write,

> +};
> +
>  static const struct rockchip_iodomain_soc_data soc_data_rv1108 = {
>  	.grf_offset = 0x404,
>  	.supply_names = {
> @@ -469,6 +531,10 @@ static const struct of_device_id rockchip_iodomain_match[] = {
>  		.compatible = "rockchip,rk3399-pmu-io-voltage-domain",
>  		.data = &soc_data_rk3399_pmu
>  	},
> +	{
> +		.compatible = "rockchip,rk3568-pmu-io-voltage-domain",
> +		.data = &soc_data_rk3568_pmu
> +	},
>  	{
>  		.compatible = "rockchip,rv1108-io-voltage-domain",
>  		.data = &soc_data_rv1108
> @@ -502,6 +568,11 @@ static int rockchip_iodomain_probe(struct platform_device *pdev)
>  	match = of_match_node(rockchip_iodomain_match, np);
>  	iod->soc_data = match->data;
>  
> +	if (match->data == &soc_data_rk3568_pmu)
> +		iod->write = rk3568_pmu_iodomain_write;
> +	else
> +		iod->write = rockchip_iodomain_write;
> +

So, please make the write callback part of the rockchip_iodomain_soc_data
struct. That way we don't need to compare for individual soc-types,
especially if later socs need a different approach again.

	if (match->data->write)
		iod->ops = match->data->write;
	else
		iod->ops = rockchip_iodomain_write;

Thanks
Heiko

>  	parent = pdev->dev.parent;
>  	if (parent && parent->of_node) {
>  		iod->grf = syscon_node_to_regmap(parent->of_node);
> @@ -562,7 +633,7 @@ static int rockchip_iodomain_probe(struct platform_device *pdev)
>  		supply->reg = reg;
>  		supply->nb.notifier_call = rockchip_iodomain_notify;
>  
> -		ret = rockchip_iodomain_write(supply, uV);
> +		ret = iod->write(supply, uV);
>  		if (ret) {
>  			supply->reg = NULL;
>  			goto unreg_notify;
>