[PATCH v2 2/3] arm64: dts: qcom: x1e80100-romulus: Set up PCIe3 / SDCard reader

[Konrad Dybcio <konradybcio@kernel.org>]

From: Konrad Dybcio <konrad.dybcio@oss.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@oss.qualcomm.com>
---
 .../boot/dts/qcom/x1e80100-microsoft-romulus.dtsi  | 42 ++++++++++++++++++++++
 1 file changed, 42 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/x1e80100-microsoft-romulus.dtsi b/arch/arm64/boot/dts/qcom/x1e80100-microsoft-romulus.dtsi
index 146e3700a3a34954c1653cbd8e148aeca481db6a..80fbcaea5d83e1147a74dd3320ae8fe8c953db57 100644
--- a/arch/arm64/boot/dts/qcom/x1e80100-microsoft-romulus.dtsi
+++ b/arch/arm64/boot/dts/qcom/x1e80100-microsoft-romulus.dtsi
@@ -767,6 +767,25 @@ &mdss_dp3_phy {
 	status = "okay";
 };
 
+&pcie3 {
+	perst-gpios = <&tlmm 143 GPIO_ACTIVE_LOW>;
+	wake-gpios = <&tlmm 145 GPIO_ACTIVE_HIGH>;
+
+	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";
 };
@@ -946,6 +965,29 @@ 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";

-- 
2.47.1