linux-kernel - [PATCH v2 3/3] arm64: dts: rockchip: add regulators for PCIe on RK3399 Puma Haikou

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Date: Fri, 08 Mar 2024 16:46:09 +0100
From: Quentin Schulz <foss+kernel@...il.net>
To: Rob Herring <robh+dt@...nel.org>, 
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, 
 Conor Dooley <conor+dt@...nel.org>, Heiko Stuebner <heiko@...ech.de>
Cc: Klaus Goger <klaus.goger@...obroma-systems.com>, 
 Quentin Schulz <foss+kernel@...il.net>, devicetree@...r.kernel.org, 
 linux-arm-kernel@...ts.infradead.org, linux-rockchip@...ts.infradead.org, 
 linux-kernel@...r.kernel.org, 
 Quentin Schulz <quentin.schulz@...obroma-systems.com>, 
 Dragan Simic <dsimic@...jaro.org>
Subject: [PATCH v2 3/3] arm64: dts: rockchip: add regulators for PCIe on
 RK3399 Puma Haikou

From: Quentin Schulz <quentin.schulz@...obroma-systems.com>

The PCIe PHY requires two regulators and are present on the SoM
directly, while the PCIe connector also exposes 3V3 and 12V power rails
which are available on the baseboard.

Considering that 3/4 regulators are always-on on HW level and that the
last one depends on a regulator from the PMIC that is specified as
always on, this commit should be purely cosmetic and no change in
behavior is expected.

Let's add all regulators for PCIe on RK3399 Puma Haikou.

Reviewed-by: Dragan Simic <dsimic@...jaro.org>
Signed-off-by: Quentin Schulz <quentin.schulz@...obroma-systems.com>
---
 .../arm64/boot/dts/rockchip/rk3399-puma-haikou.dts |  2 ++
 arch/arm64/boot/dts/rockchip/rk3399-puma.dtsi      | 26 ++++++++++++++++++++++
 2 files changed, 28 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3399-puma-haikou.dts b/arch/arm64/boot/dts/rockchip/rk3399-puma-haikou.dts
index 18a98c4648eae..66ebb148bbc9a 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399-puma-haikou.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3399-puma-haikou.dts
@@ -194,6 +194,8 @@ &pcie0 {
 	num-lanes = <4>;
 	pinctrl-names = "default";
 	pinctrl-0 = <&pcie_clkreqn_cpm>;
+	vpcie3v3-supply = <&vcc3v3_baseboard>;
+	vpcie12v-supply = <&dc_12v>;
 	status = "okay";
 };
 
diff --git a/arch/arm64/boot/dts/rockchip/rk3399-puma.dtsi b/arch/arm64/boot/dts/rockchip/rk3399-puma.dtsi
index 2484ad2bd86fc..ccbe3a7a1d2c2 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399-puma.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3399-puma.dtsi
@@ -79,6 +79,26 @@ vcc5v0_sys: vcc5v0-sys {
 		regulator-max-microvolt = <5000000>;
 	};
 
+	vcca_0v9: vcca-0v9-regulator {
+		compatible = "regulator-fixed";
+		regulator-name = "vcca_0v9";
+		regulator-always-on;
+		regulator-boot-on;
+		regulator-min-microvolt = <900000>;
+		regulator-max-microvolt = <900000>;
+		vin-supply = <&vcc_1v8>;
+	};
+
+	vcca_1v8: vcca-1v8-regulator {
+		compatible = "regulator-fixed";
+		regulator-name = "vcca_1v8";
+		regulator-always-on;
+		regulator-boot-on;
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <1800000>;
+		vin-supply = <&vcc3v3_sys>;
+	};
+
 	vdd_log: vdd-log {
 		compatible = "pwm-regulator";
 		pwms = <&pwm2 0 25000 1>;
@@ -416,6 +436,12 @@ &io_domains {
 	gpio1830-supply = <&vcc_1v8>;
 };
 
+&pcie0 {
+	/* PCIe PHY supplies */
+	vpcie0v9-supply = <&vcca_0v9>;
+	vpcie1v8-supply = <&vcca_1v8>;
+};
+
 &pcie_clkreqn_cpm {
 	rockchip,pins =
 		<2 RK_PD2 RK_FUNC_GPIO &pcfg_pull_up>;

-- 
2.44.0