linux-kernel - [PATCH 2/3] arm64: dts: rockchip: Add WiFi on rk3576-evb1-v10

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Message-Id: <20250813-evb1-rtcwifibt-v1-2-d13c83422971@gmail.com>
Date: Wed, 13 Aug 2025 00:30:24 +0400
From: Alexey Charkov <alchark@...il.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: devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 Pavel Zhovner <pavel@...pperdevices.com>, 
 Alexey Charkov <alchark@...il.com>
Subject: [PATCH 2/3] arm64: dts: rockchip: Add WiFi on rk3576-evb1-v10

Add device tree nodes to enable the onboard Ampak AP6275P WiFi chip
connected over a PCIe link on Rockchip RK3576 EVB1.

It takes an external 32 kHz clock from the RTC chip and requires the
WIFI_REG_ON signal to be enabled before the bus is enumerated to
initialize properly.

Tested-by: Pavel Zhovner <pavel@...pperdevices.com>
Signed-off-by: Alexey Charkov <alchark@...il.com>
---
 arch/arm64/boot/dts/rockchip/rk3576-evb1-v10.dts | 58 ++++++++++++++++++++++++
 1 file changed, 58 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3576-evb1-v10.dts b/arch/arm64/boot/dts/rockchip/rk3576-evb1-v10.dts
index bfefd37a1ab8c67a17aba0cdb80980102d66bb76..100ca2e23c6093ae517d741fcd047e2a8172f457 100644
--- a/arch/arm64/boot/dts/rockchip/rk3576-evb1-v10.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3576-evb1-v10.dts
@@ -232,6 +232,20 @@ vcc_ufs_s0: regulator-vcc-ufs-s0 {
 		regulator-max-microvolt = <3300000>;
 		vin-supply = <&vcc_sys>;
 	};
+
+	vcc_wifi_reg_on: regulator-wifi-reg-on {
+		compatible = "regulator-fixed";
+		enable-active-high;
+		gpios = <&gpio1 RK_PC6 GPIO_ACTIVE_HIGH>;
+		pinctrl-0 = <&wifi_reg_on>;
+		pinctrl-names = "default";
+		regulator-always-on;
+		regulator-boot-on;
+		regulator-name = "wifi_reg_on";
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <1800000>;
+		vin-supply = <&vcc_1v8_s3>;
+	};
 };
 
 &cpu_l0 {
@@ -242,6 +256,10 @@ &cpu_b0 {
 	cpu-supply = <&vdd_cpu_big_s0>;
 };
 
+&combphy0_ps {
+	status = "okay";
+};
+
 &combphy1_psu {
 	status = "okay";
 };
@@ -712,6 +730,30 @@ rgmii_phy1: phy@1 {
 	};
 };
 
+&pcie0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pcie0_rst>;
+	reset-gpios = <&gpio2 RK_PB4 GPIO_ACTIVE_HIGH>;
+	vpcie3v3-supply = <&vcc_3v3_s3>;
+	status = "okay";
+
+	pcie@0,0 {
+		reg = <0x0 0 0 0 0>;
+		#address-cells = <3>;
+		#size-cells = <2>;
+		bus-range = <0x0 0xf>;
+		device_type = "pci";
+		ranges;
+
+		wifi: wifi@0,0 {
+			compatible = "pci14e4,449d";
+			reg = <0x10000 0 0 0 0>;
+			clocks = <&hym8563>;
+			clock-names = "lpo";
+		};
+	};
+};
+
 &pcie1 {
 	reset-gpios = <&gpio4 RK_PC4 GPIO_ACTIVE_HIGH>;
 	vpcie3v3-supply = <&vcc3v3_pcie1>;
@@ -730,6 +772,12 @@ rtc_int: rtc-int {
 		};
 	};
 
+	pcie0 {
+		pcie0_rst: pcie0-rst {
+			rockchip,pins = <2 RK_PB4 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+	};
+
 	usb {
 		usb_host_pwren: usb-host-pwren {
 			rockchip,pins = <0 RK_PC7 RK_FUNC_GPIO &pcfg_pull_none>;
@@ -743,6 +791,16 @@ usbc0_int: usbc0-int {
 			rockchip,pins = <0 RK_PA5 RK_FUNC_GPIO &pcfg_pull_up>;
 		};
 	};
+
+	wifi {
+		wifi_reg_on: wifi-reg-on {
+			rockchip,pins = <1 RK_PC6 RK_FUNC_GPIO &pcfg_pull_up>;
+		};
+
+		wifi_wake_host: wifi-wake-host {
+			rockchip,pins = <0 RK_PB0 RK_FUNC_GPIO &pcfg_pull_down>;
+		};
+	};
 };
 
 &sdmmc {

-- 
2.49.1