[PATCH v4 02/10] arm64: dts: qcom: qcs6490-rb3gen2: Add TC956x PCIe switch node

Krishna Chaitanya Chundru
2025-02-25T09:34:42Z

Add a node for the TC956x PCIe switch, which has three downstream ports.
Two embedded Ethernet devices are present on one of the downstream ports.

Power to the TC956x is supplied through two LDO regulators, controlled by
two GPIOs, which are added as fixed regulators. Configure the TC956x
through I2C.

Signed-off-by: Krishna Chaitanya Chundru <krishna.chundru@oss.qualcomm.com>
Reviewed-by: Bjorn Andersson <andersson@kernel.org>
Acked-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
---
arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts | 116 +++++++++++++++++++++++++++
arch/arm64/boot/dts/qcom/sc7280.dtsi | 2 +-
2 files changed, 117 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts b/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts
index 7a36c90ad4ec..13dbb24a3179 100644
--- a/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts
+++ b/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts
@@ -218,6 +218,31 @@ vph_pwr: vph-pwr-regulator {
regulator-min-microvolt = <3700000>;
regulator-max-microvolt = <3700000>;
};
+
+ vdd_ntn_0p9: regulator-vdd-ntn-0p9 {
+ compatible = "regulator-fixed";
+ regulator-name = "VDD_NTN_0P9";
+ gpio = <&pm8350c_gpios 2 GPIO_ACTIVE_HIGH>;
+ regulator-min-microvolt = <899400>;
+ regulator-max-microvolt = <899400>;
+ enable-active-high;
+ pinctrl-0 = <&ntn_0p9_en>;
+ pinctrl-names = "default";
+ regulator-enable-ramp-delay = <4300>;
+ };
+
+ vdd_ntn_1p8: regulator-vdd-ntn-1p8 {
+ compatible = "regulator-fixed";
+ regulator-name = "VDD_NTN_1P8";
+ gpio = <&pm8350c_gpios 3 GPIO_ACTIVE_HIGH>;
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ enable-active-high;
+ pinctrl-0 = <&ntn_1p8_en>;
+ pinctrl-names = "default";
+ regulator-enable-ramp-delay = <10000>;
+ };
+
};

&apps_rsc {
@@ -735,6 +760,75 @@ &pcie1_phy {
status = "okay";
};

+&pcie1_port {
+ pcie@0,0 {
+ compatible = "pci1179,0623", "pciclass,0604";
+ reg = <0x10000 0x0 0x0 0x0 0x0>;
+ #address-cells = <3>;
+ #size-cells = <2>;
+
+ device_type = "pci";
+ ranges;
+ bus-range = <0x2 0xff>;
+
+ vddc-supply = <&vdd_ntn_0p9>;
+ vdd18-supply = <&vdd_ntn_1p8>;
+ vdd09-supply = <&vdd_ntn_0p9>;
+ vddio1-supply = <&vdd_ntn_1p8>;
+ vddio2-supply = <&vdd_ntn_1p8>;
+ vddio18-supply = <&vdd_ntn_1p8>;
+
+ i2c-parent = <&i2c0 0x77>;
+
+ reset-gpios = <&pm8350c_gpios 1 GPIO_ACTIVE_LOW>;
+
+ pcie@1,0 {
+ reg = <0x20800 0x0 0x0 0x0 0x0>;
+ #address-cells = <3>;
+ #size-cells = <2>;
+
+ device_type = "pci";
+ ranges;
+ bus-range = <0x3 0xff>;
+ };
+
+ pcie@2,0 {
+ reg = <0x21000 0x0 0x0 0x0 0x0>;
+ #address-cells = <3>;
+ #size-cells = <2>;
+
+ device_type = "pci";
+ ranges;
+ bus-range = <0x4 0xff>;
+ };
+
+ pcie@3,0 {
+ reg = <0x21800 0x0 0x0 0x0 0x0>;
+ #address-cells = <3>;
+ #size-cells = <2>;
+ device_type = "pci";
+ ranges;
+ bus-range = <0x5 0xff>;
+
+ pcie@0,0 {
+ reg = <0x50000 0x0 0x0 0x0 0x0>;
+ #address-cells = <3>;
+ #size-cells = <2>;
+ device_type = "pci";
+ ranges;
+ };
+
+ pcie@0,1 {
+ reg = <0x50100 0x0 0x0 0x0 0x0>;
+ #address-cells = <3>;
+ #size-cells = <2>;
+ device_type = "pci";
+ ranges;
+ };
+ };
+ };
+};
+
&pm7325_gpios {
kypd_vol_up_n: kypd-vol-up-n-state {
pins = "gpio6";
@@ -839,6 +933,28 @@ &sdhc_2 {
status = "okay";
};

+&pm8350c_gpios {
+ ntn_0p9_en: ntn-0p9-en-state {
+ pins = "gpio2";
+ function = "normal";
+
+ bias-disable;
+ input-disable;
+ output-enable;
+ power-source = <0>;
+ };
+
+ ntn_1p8_en: ntn-1p8-en-state {
+ pins = "gpio3";
+ function = "normal";
+
+ bias-disable;
+ input-disable;
+ output-enable;
+ power-source = <0>;
+ };
+};
+
&tlmm {
gpio-reserved-ranges = <32 2>, /* ADSP */
<48 4>; /* NFC */
diff --git a/arch/arm64/boot/dts/qcom/sc7280.dtsi b/arch/arm64/boot/dts/qcom/sc7280.dtsi
index 0f2caf36910b..b2e2b1f26731 100644
--- a/arch/arm64/boot/dts/qcom/sc7280.dtsi
+++ b/arch/arm64/boot/dts/qcom/sc7280.dtsi
@@ -2284,7 +2284,7 @@ pcie1: pcie@1c08000 {

status = "disabled";

- pcie@0 {
+ pcie1_port: pcie@0 {
device_type = "pci";
reg = <0x0 0x0 0x0 0x0 0x0>;
bus-range = <0x01 0xff>;

--
2.34.1