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Date:   Sun, 26 Feb 2017 13:48:40 -0800
From:   Kevin Hilman <khilman@...libre.com>
To:     David Wu <david.wu@...k-chips.com>
Cc:     rjw@...ysocki.net, nm@...com, heiko@...ech.de,
        rafael.j.wysocki@...el.com, huangtao@...k-chips.com,
        linux-rockchip@...ts.infradead.org, linux-pm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [RESEND PATCH] PM / AVS: rockchip-io: add io selectors and supplies for rk3328

David Wu <david.wu@...k-chips.com> writes:

> From: "david.wu" <david.wu@...k-chips.com>
>
> This adds the necessary data for handling io voltage domains on the rk3328.
> As interesting tidbit, the rk3328 only contains one iodomain area in the
> regular General Register Files (GRF).
>
> Signed-off-by: david.wu <david.wu@...k-chips.com>
> Reviewed-by: Heiko Stuebner <heiko@...ech.de>

Reviewed-by: Kevin Hilman <khilman@...libre.com>

Rafael, feel free to take directly.  I don't currently have any other
AVS stuff in the queue.

Kevin

> ---
>  .../bindings/power/rockchip-io-domain.txt          |  1 +
>  drivers/power/avs/rockchip-io-domain.c             | 41 ++++++++++++++++++++++
>  2 files changed, 42 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/power/rockchip-io-domain.txt b/Documentation/devicetree/bindings/power/rockchip-io-domain.txt
> index d23dc00..d3a5a93 100644
> --- a/Documentation/devicetree/bindings/power/rockchip-io-domain.txt
> +++ b/Documentation/devicetree/bindings/power/rockchip-io-domain.txt
> @@ -33,6 +33,7 @@ Required properties:
>  - compatible: should be one of:
>    - "rockchip,rk3188-io-voltage-domain" for rk3188
>    - "rockchip,rk3288-io-voltage-domain" for rk3288
> +  - "rockchip,rk3328-io-voltage-domain" for rk3328
>    - "rockchip,rk3368-io-voltage-domain" for rk3368
>    - "rockchip,rk3368-pmu-io-voltage-domain" for rk3368 pmu-domains
>    - "rockchip,rk3399-io-voltage-domain" for rk3399
> diff --git a/drivers/power/avs/rockchip-io-domain.c b/drivers/power/avs/rockchip-io-domain.c
> index 56bce19..8581252 100644
> --- a/drivers/power/avs/rockchip-io-domain.c
> +++ b/drivers/power/avs/rockchip-io-domain.c
> @@ -43,6 +43,10 @@
>  #define RK3288_SOC_CON2_FLASH0		BIT(7)
>  #define RK3288_SOC_FLASH_SUPPLY_NUM	2
>  
> +#define RK3328_SOC_CON4			0x410
> +#define RK3328_SOC_CON4_VCCIO2		BIT(7)
> +#define RK3328_SOC_VCCIO2_SUPPLY_NUM	1
> +
>  #define RK3368_SOC_CON15		0x43c
>  #define RK3368_SOC_CON15_FLASH0		BIT(14)
>  #define RK3368_SOC_FLASH_SUPPLY_NUM	2
> @@ -166,6 +170,25 @@ static void rk3288_iodomain_init(struct rockchip_iodomain *iod)
>  		dev_warn(iod->dev, "couldn't update flash0 ctrl\n");
>  }
>  
> +static void rk3328_iodomain_init(struct rockchip_iodomain *iod)
> +{
> +	int ret;
> +	u32 val;
> +
> +	/* if no vccio2 supply we should leave things alone */
> +	if (!iod->supplies[RK3328_SOC_VCCIO2_SUPPLY_NUM].reg)
> +		return;
> +
> +	/*
> +	 * set vccio2 iodomain to also use this framework
> +	 * instead of a special gpio.
> +	 */
> +	val = RK3328_SOC_CON4_VCCIO2 | (RK3328_SOC_CON4_VCCIO2 << 16);
> +	ret = regmap_write(iod->grf, RK3328_SOC_CON4, val);
> +	if (ret < 0)
> +		dev_warn(iod->dev, "couldn't update vccio2 vsel ctrl\n");
> +}
> +
>  static void rk3368_iodomain_init(struct rockchip_iodomain *iod)
>  {
>  	int ret;
> @@ -247,6 +270,20 @@ static void rk3399_pmu_iodomain_init(struct rockchip_iodomain *iod)
>  	.init = rk3288_iodomain_init,
>  };
>  
> +static const struct rockchip_iodomain_soc_data soc_data_rk3328 = {
> +	.grf_offset = 0x410,
> +	.supply_names = {
> +		"vccio1",
> +		"vccio2",
> +		"vccio3",
> +		"vccio4",
> +		"vccio5",
> +		"vccio6",
> +		"pmuio",
> +	},
> +	.init = rk3328_iodomain_init,
> +};
> +
>  static const struct rockchip_iodomain_soc_data soc_data_rk3368 = {
>  	.grf_offset = 0x900,
>  	.supply_names = {
> @@ -312,6 +349,10 @@ static void rk3399_pmu_iodomain_init(struct rockchip_iodomain *iod)
>  		.data = (void *)&soc_data_rk3288
>  	},
>  	{
> +		.compatible = "rockchip,rk3328-io-voltage-domain",
> +		.data = (void *)&soc_data_rk3328
> +	},
> +	{
>  		.compatible = "rockchip,rk3368-io-voltage-domain",
>  		.data = (void *)&soc_data_rk3368
>  	},

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