[PATCH v4] riscv: dts: thead: Enable wifi on the BeagleV-Ahead

[PATCH v4] riscv: dts: thead: Enable wifi on the BeagleV-Ahead

[Thomas Gerner]

The BeagleV-Ahead board uses an AP6203BM WiFi chip from AMPAK Technology
Inc. connected to SDIO1. The chip is compatible to the broadcom wireless
driver.

The AP6203BM is a dual-band 2.4GHz/5GHz Wi-Fi 4 (802.11a/b/g/n) and
Bluetooth 5.4 module. Bluetooth is not enabled by this patch.

Signed-off-by: Thomas Gerner <thomas.gerner@muenchen-mail.de>
---
Change in v4:
- follow DTS coding style
- use generic name for pwrseq node

Change in v3:
- consider further issues found by sashiko AI review

Change in v2:
- consider issues found by sashiko AI review

 .../boot/dts/thead/th1520-beaglev-ahead.dts   | 48 +++++++++++++++++++
 1 file changed, 48 insertions(+)

diff --git a/arch/riscv/boot/dts/thead/th1520-beaglev-ahead.dts b/arch/riscv/boot/dts/thead/th1520-beaglev-ahead.dts
index 91f3f9b987bc..e16484a47653 100644
--- a/arch/riscv/boot/dts/thead/th1520-beaglev-ahead.dts
+++ b/arch/riscv/boot/dts/thead/th1520-beaglev-ahead.dts
@@ -86,6 +86,11 @@ hdmi_con_in: endpoint {
 			};
 		};
 	};
+
+	wifi_pwrseq: wifi-pwrseq {
+		compatible = "mmc-pwrseq-simple";
+		reset-gpios = <&gpio2 31 GPIO_ACTIVE_LOW>;	/* WL-REG-ON */
+	};
 };
 
 &osc {
@@ -239,6 +244,28 @@ rx-pins {
 			slew-rate = <0>;
 		};
 	};
+
+	wifi_pins: wifi-0 {
+		host-wake-pins {
+			pins = "GPIO2_25";
+			function = "gpio";
+			bias-disable;
+			drive-strength = <1>;
+			input-enable;
+			input-schmitt-disable;
+			slew-rate = <0>;
+		};
+
+		reg-on-pins {
+			pins = "GPIO2_31";
+			function = "gpio";
+			bias-disable;
+			drive-strength = <3>;
+			input-disable;
+			input-schmitt-disable;
+			slew-rate = <0>;
+		};
+	};
 };
 
 &sdio0 {
@@ -247,6 +274,27 @@ &sdio0 {
 	status = "okay";
 };
 
+&sdio1 {
+	bus-width = <4>;
+	max-frequency = <198000000>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&wifi_pins>;
+	#address-cells = <1>;
+	#size-cells = <0>;
+	non-removable;
+	keep-power-in-suspend;
+	mmc-pwrseq = <&wifi_pwrseq>;
+	status = "okay";
+
+	wifi@1 {
+		compatible = "cypress,cyw43012-fmac", "brcm,bcm4329-fmac";
+		reg = <1>;
+		interrupt-parent = <&gpio2>;
+		interrupts = <25 IRQ_TYPE_EDGE_RISING>;
+		interrupt-names = "host-wake";
+	};
+};
+
 &dpu {
 	status = "okay";
 };
-- 
2.43.0