[PATCH v3 2/2] arm64: dts: rockchip: make PCIe3 (M.2 M key) work for Radxa ROCK 3A

[FUKAUMI Naoki]

on Radxa ROCK 3A, GPIO0_D4 is used to enable both pi6c PCIe clock
generator and "vcc3v3_pcie" regulator (PCIe3 M.2 M key connector).

since pi6c needs to be enabled before using PCIe3, GPIO0_D4 need to be
controlled by "vcc3v3_pi6c_03" regulator. then, make "vcc3v3_pi6c_03"
vin-supply for "vcc3v3_pcie30x1".

also, "pcie30_avdd0v9" and "pcie30_avdd1v8" are unused. remove them.

Fixes: 0522cd811220 ("arm64: dts: rockchip: Add PCIe v3 nodes to rock-3a")
Signed-off-by: FUKAUMI Naoki <naoki at radxa.com>
---
Changes in v3:
- fix pinctrl just for reset pin as GPIO
Changes in v2:
- split patches for PCIe2 and PCIe3
- change regulator name from "vcc3v3_pcie" to "vcc3v3_pcie30x1"
- add comment for vin-supply of "vcc3v3_pcie30x1" regulator
- remove unused "pcie30_avdd0v9" and "pcie30_avdd1v8"
- fix pinctrl node name to overwrite rk3568-pinctrl.dtsi
---
 .../boot/dts/rockchip/rk3568-rock-3a.dts      | 45 +++++++------------
 1 file changed, 15 insertions(+), 30 deletions(-)

diff --git a/arch/arm64/boot/dts/rockchip/rk3568-rock-3a.dts b/arch/arm64/boot/dts/rockchip/rk3568-rock-3a.dts
index f94cbddf0f0c2..6b3f3ee7f22c7 100644
--- a/arch/arm64/boot/dts/rockchip/rk3568-rock-3a.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3568-rock-3a.dts
@@ -86,29 +86,13 @@ vcc12v_dcin: vcc12v-dcin-regulator {
 		regulator-boot-on;
 	};
 
-	pcie30_avdd0v9: pcie30-avdd0v9-regulator {
-		compatible = "regulator-fixed";
-		regulator-name = "pcie30_avdd0v9";
-		regulator-always-on;
-		regulator-boot-on;
-		regulator-min-microvolt = <900000>;
-		regulator-max-microvolt = <900000>;
-		vin-supply = <&vcc3v3_sys>;
-	};
-
-	pcie30_avdd1v8: pcie30-avdd1v8-regulator {
-		compatible = "regulator-fixed";
-		regulator-name = "pcie30_avdd1v8";
-		regulator-always-on;
-		regulator-boot-on;
-		regulator-min-microvolt = <1800000>;
-		regulator-max-microvolt = <1800000>;
-		vin-supply = <&vcc3v3_sys>;
-	};
-
 	/* pi6c pcie clock generator */
 	vcc3v3_pi6c_03: vcc3v3-pi6c-03-regulator {
 		compatible = "regulator-fixed";
+		enable-active-high;
+		gpios = <&gpio0 RK_PD4 GPIO_ACTIVE_HIGH>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&pcie_pwren_h>;
 		regulator-name = "vcc3v3_pi6c_03";
 		regulator-always-on;
 		regulator-boot-on;
@@ -117,16 +101,13 @@ vcc3v3_pi6c_03: vcc3v3-pi6c-03-regulator {
 		vin-supply = <&vcc5v0_sys>;
 	};
 
-	vcc3v3_pcie: vcc3v3-pcie-regulator {
+	/* actually fed by vcc5v0_sys, dependent on pi6c clock generator */
+	vcc3v3_pcie30x1: vcc3v3-pcie30x1-regulator {
 		compatible = "regulator-fixed";
-		enable-active-high;
-		gpios = <&gpio0 RK_PD4 GPIO_ACTIVE_HIGH>;
-		pinctrl-names = "default";
-		pinctrl-0 = <&pcie_enable_h>;
-		regulator-name = "vcc3v3_pcie";
+		regulator-name = "vcc3v3_pcie30x1";
 		regulator-min-microvolt = <3300000>;
 		regulator-max-microvolt = <3300000>;
-		vin-supply = <&vcc5v0_sys>;
+		vin-supply = <&vcc3v3_pi6c_03>;
 	};
 
 	vcc3v3_sys: vcc3v3-sys-regulator {
@@ -615,9 +596,9 @@ &pcie30phy {
 
 &pcie3x2 {
 	pinctrl-names = "default";
-	pinctrl-0 = <&pcie30x2m1_pins>;
+	pinctrl-0 = <&pcie30x2_perstn_m1>;
 	reset-gpios = <&gpio2 RK_PD6 GPIO_ACTIVE_HIGH>;
-	vpcie3v3-supply = <&vcc3v3_pcie>;
+	vpcie3v3-supply = <&vcc3v3_pcie30x1>;
 	status = "okay";
 };
 
@@ -657,7 +638,11 @@ pcie20_perstn_m1: pcie20-perstn-m1 {
 			rockchip,pins = <3 RK_PC1 RK_FUNC_GPIO &pcfg_pull_none>;
 		};
 
-		pcie_enable_h: pcie-enable-h {
+		pcie30x2_perstn_m1: pcie30x2-perstn-m1 {
+			rockchip,pins = <2 RK_PD6 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+
+		pcie_pwren_h: pcie-pwren-h {
 			rockchip,pins = <0 RK_PD4 RK_FUNC_GPIO &pcfg_pull_none>;
 		};
 	};
-- 
2.43.0