PM / AVS: rockchip-io: add io selectors and supplies for rk3228

This adds the necessary data for handling io voltage domains on the rk3228.

Signed-off-by: David Wu <david.wu@rock-chips.com>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Documentation/devicetree/bindings/power/rockchip-io-domain.txt

@@ -32,6 +32,7 @@ SoC is on the same page.
 Required properties:
 - compatible: should be one of:
   - "rockchip,rk3188-io-voltage-domain" for rk3188
+  - "rockchip,rk3228-io-voltage-domain" for rk3228
   - "rockchip,rk3288-io-voltage-domain" for rk3288
   - "rockchip,rk3328-io-voltage-domain" for rk3328
   - "rockchip,rk3368-io-voltage-domain" for rk3368
@@ -59,6 +60,12 @@ Possible supplies for rk3188:
 - vccio1-supply: The supply connected to VCCIO1.
                  Sometimes also labeled VCCIO1 and VCCIO2.
 
+Possible supplies for rk3228:
+- vccio1-supply: The supply connected to VCCIO1.
+- vccio2-supply: The supply connected to VCCIO2.
+- vccio3-supply: The supply connected to VCCIO3.
+- vccio4-supply: The supply connected to VCCIO4.
+
 Possible supplies for rk3288:
 - audio-supply:  The supply connected to APIO4_VDD.
 - bb-supply:     The supply connected to APIO5_VDD.

drivers/power/avs/rockchip-io-domain.c

@@ -253,6 +253,16 @@ static const struct rockchip_iodomain_soc_data soc_data_rk3188 = {
 	},
 };
 
+static const struct rockchip_iodomain_soc_data soc_data_rk3228 = {
+	.grf_offset = 0x418,
+	.supply_names = {
+		"vccio1",
+		"vccio2",
+		"vccio3",
+		"vccio4",
+	},
+};
+
 static const struct rockchip_iodomain_soc_data soc_data_rk3288 = {
 	.grf_offset = 0x380,
 	.supply_names = {
@@ -344,6 +354,10 @@ static const struct of_device_id rockchip_iodomain_match[] = {
 		.compatible = "rockchip,rk3188-io-voltage-domain",
 		.data = (void *)&soc_data_rk3188
 	},
+	{
+		.compatible = "rockchip,rk3228-io-voltage-domain",
+		.data = (void *)&soc_data_rk3228
+	},
 	{
 		.compatible = "rockchip,rk3288-io-voltage-domain",
 		.data = (void *)&soc_data_rk3288