linux-kernel - [PATCH] arm64: dts: rockchip: enable pcie on Sige5

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Message-Id: <20250414-rk3576-sige5-pcie-v1-1-0e950a96f392@collabora.com>
Date: Mon, 14 Apr 2025 20:37:38 +0200
From: Nicolas Frattaroli <nicolas.frattaroli@...labora.com>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Heiko Stuebner <heiko@...ech.de>
Cc: kernel@...labora.com, 
 Sebastian Reichel <sebastian.reichel@...labora.com>, 
 Kever Yang <kever.yang@...k-chips.com>, 
 Shawn Lin <shawn.lin@...k-chips.com>, devicetree@...r.kernel.org, 
 linux-arm-kernel@...ts.infradead.org, linux-rockchip@...ts.infradead.org, 
 linux-kernel@...r.kernel.org, 
 Nicolas Frattaroli <nicolas.frattaroli@...labora.com>
Subject: [PATCH] arm64: dts: rockchip: enable pcie on Sige5

The ArmSoM Sige5 board exposes PCIe controller 0 on its M.2 slot on the
bottom of the board. Enable the necessary nodes for it, and also add the
correct pins for both the power enable GPIO and the PCIe reset GPIO.

Signed-off-by: Nicolas Frattaroli <nicolas.frattaroli@...labora.com>
---
This depends on Kever's PCIe series[1], which is included as part of the
b4 dependencies.

[1]: https://lore.kernel.org/linux-rockchip/20250414145110.11275-1-kever.yang@rock-chips.com/
---
 .../boot/dts/rockchip/rk3576-armsom-sige5.dts      | 23 ++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3576-armsom-sige5.dts b/arch/arm64/boot/dts/rockchip/rk3576-armsom-sige5.dts
index 828bde7fab68dc6bcbd13d75c8a72540b3666071..964ee351d3b63fcb4ede70f4b6c06541715cfe19 100644
--- a/arch/arm64/boot/dts/rockchip/rk3576-armsom-sige5.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3576-armsom-sige5.dts
@@ -117,6 +117,8 @@ vcc_2v0_pldo_s3: regulator-vcc-2v0-pldo-s3 {
 
 	vcc_3v3_pcie: regulator-vcc-3v3-pcie {
 		compatible = "regulator-fixed";
+		pinctrl-names = "default";
+		pinctrl-0 = <&pcie_pwr_en>;
 		regulator-name = "vcc_3v3_pcie";
 		regulator-min-microvolt = <3300000>;
 		regulator-max-microvolt = <3300000>;
@@ -177,6 +179,10 @@ vcc_3v3_ufs_s0: regulator-vcc-ufs-s0 {
 	};
 };
 
+&combphy0_ps {
+	status = "okay";
+};
+
 &cpu_l0 {
 	cpu-supply = <&vdd_cpu_lit_s0>;
 };
@@ -634,6 +640,14 @@ rgmii_phy1: phy@1 {
 	};
 };
 
+&pcie0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pcie_reset>;
+	reset-gpios = <&gpio2 RK_PB4 GPIO_ACTIVE_HIGH>;
+	vpcie3v3-supply = <&vcc_3v3_pcie>;
+	status = "okay";
+};
+
 &pinctrl {
 	headphone {
 		hp_det: hp-det {
@@ -655,6 +669,15 @@ led_rgb_g: led-green-en {
 			rockchip,pins = <4 RK_PB2 RK_FUNC_GPIO &pcfg_pull_none>;
 		};
 	};
+
+	pcie {
+		pcie_pwr_en: pcie-pwr-en {
+			rockchip,pins = <3 RK_PD6 RK_FUNC_GPIO &pcfg_pull_down>;
+		};
+		pcie_reset: pcie-reset {
+			rockchip,pins = <2 RK_PB4 RK_FUNC_GPIO &pcfg_pull_up>;
+		};
+	};
 };
 
 &sdhci {

---
base-commit: 8a834b0ac9ceb354a6e0b8cf5b363edca8221bdd
change-id: 20250414-rk3576-sige5-pcie-55b4dc01ddfd
prerequisite-message-id: <20250414145110.11275-1-kever.yang@...k-chips.com>
prerequisite-patch-id: deb68e2b51dbf1fb35a16464d2be570ed4418f8b
prerequisite-patch-id: 0a48a30fa57c8c11524167f4b753f58f918bb26d

Best regards,
-- 
Nicolas Frattaroli <nicolas.frattaroli@...labora.com>