linux-kernel - [PATCH 2/3] arm64: dts: qcom: x1e80100-romulus: Set up PCIe3 / SDCard reader

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Message-Id: <20241122-topic-sl7_feat2-v1-2-33e616be879b@oss.qualcomm.com>
Date: Fri, 22 Nov 2024 03:14:11 +0100
From: Konrad Dybcio <konradybcio@...nel.org>
To: Bjorn Andersson <andersson@...nel.org>, 
 Konrad Dybcio <konradybcio@...nel.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>
Cc: Marijn Suijten <marijn.suijten@...ainline.org>, 
 linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, 
 Konrad Dybcio <konrad.dybcio@....qualcomm.com>
Subject: [PATCH 2/3] arm64: dts: qcom: x1e80100-romulus: Set up PCIe3 /
 SDCard reader

From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>

The Surface Laptops have a Realtek RTS5261 SD Card reader connected
over a Gen1x1 link to the PCIe3 host. Set up the necessary bits to
make it functional.

Signed-off-by: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
---
 .../boot/dts/qcom/x1e80100-microsoft-romulus.dtsi  | 63 ++++++++++++++++++++++
 1 file changed, 63 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/x1e80100-microsoft-romulus.dtsi b/arch/arm64/boot/dts/qcom/x1e80100-microsoft-romulus.dtsi
index 6aea8f3573e834273d56448da772edd27855efec..66a12b20b096baa7d5cf8c5fb65927b765aa18ff 100644
--- a/arch/arm64/boot/dts/qcom/x1e80100-microsoft-romulus.dtsi
+++ b/arch/arm64/boot/dts/qcom/x1e80100-microsoft-romulus.dtsi
@@ -767,6 +767,27 @@ &mdss_dp3_phy {
 	status = "okay";
 };
 
+&pcie3 {
+	perst-gpios = <&tlmm 143 GPIO_ACTIVE_LOW>;
+	wake-gpios = <&tlmm 145 GPIO_ACTIVE_HIGH>;
+
+	/* The power supply enable GPIOs are reserved by the secure firmware */
+
+	pinctrl-0 = <&pcie3_default>;
+	pinctrl-names = "default";
+
+	/* The RTS5261 chip on the other side only does Gen1x1 anyway */
+	max-link-speed = <1>;
+	status = "okay";
+};
+
+&pcie3_phy {
+	vdda-phy-supply = <&vreg_l3c>;
+	vdda-pll-supply = <&vreg_l3e>;
+
+	status = "okay";
+};
+
 &pcie4 {
 	status = "okay";
 };
@@ -797,6 +818,25 @@ &pcie6a_phy {
 	status = "okay";
 };
 
+&pm8550ve_2_gpios {
+	sde7_main_reg_en: sde7-main-reg-en-state {
+		pins = "gpio6";
+		function = "normal";
+	};
+
+	sde7_aux_reg_en: sde7-aux-reg-en-state {
+		pins = "gpio8";
+		function = "normal";
+	};
+};
+
+&pm8550ve_8_gpios {
+	vreg_12v_x8_en: 12v-x8-reg-en-state {
+		pins = "gpio8";
+		function = "normal";
+	};
+};
+
 &pmc8380_3_gpios {
 	edp_bl_en: edp-bl-en-state {
 		pins = "gpio4";
@@ -946,6 +986,29 @@ ssam_state: ssam-state-state {
 		bias-disable;
 	};
 
+	pcie3_default: pcie3-default-state {
+		perst-n-pins {
+			pins = "gpio143";
+			function = "gpio";
+			drive-strength = <2>;
+			bias-disable;
+		};
+
+		clkreq-n-pins {
+			pins = "gpio144";
+			function = "pcie3_clk";
+			drive-strength = <2>;
+			bias-pull-up;
+		};
+
+		wake-n-pins {
+			pins = "gpio145";
+			function = "gpio";
+			drive-strength = <2>;
+			bias-pull-up;
+		};
+	};
+
 	pcie6a_default: pcie6a-default-state {
 		perst-n-pins {
 			pins = "gpio152";

-- 
2.47.0