Enable Wifi on Tinker board S

0001-ARM-dts-rk3288-tinker-s-Enable-wifi.patch

From b2593553b2e3c418cb17e9788f14c1d7a5c9f810 Mon Sep 17 00:00:00 2001
From: Stefan Wahren <stefan.wahren@i2se.com>
Date: Fri, 8 Feb 2019 13:38:10 +0100
Subject: [PATCH] ARM: dts: rk3288-tinker-s: Enable Wifi

This enables the Wifi part of the Realtek RTL8723BS combo module.
Since the schematics doesn't provide any helpful information this patch
mostly based on the vendor kernel:
https://github.com/TinkerBoard/debian_kernel/commit/6a3128ade33f758887048578ada61a4b7ab8e678

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
---
 arch/arm/boot/dts/rk3288-tinker-s.dts | 50 +++++++++++++++++++++++++++++++++++
 1 file changed, 50 insertions(+)

diff --git a/arch/arm/boot/dts/rk3288-tinker-s.dts b/arch/arm/boot/dts/rk3288-tinker-s.dts
index 3709392..4c9ca0d 100644
--- a/arch/arm/boot/dts/rk3288-tinker-s.dts
+++ b/arch/arm/boot/dts/rk3288-tinker-s.dts
@@ -5,11 +5,29 @@
 
 /dts-v1/;
 
+#include <dt-bindings/clock/rockchip,rk808.h>
 #include "rk3288-tinker.dtsi"
 
 / {
 	model = "Rockchip RK3288 Asus Tinker Board S";
 	compatible = "asus,rk3288-tinker-s", "rockchip,rk3288";
+
+	sdio_pwrseq: sdio-pwrseq {
+		compatible = "mmc-pwrseq-simple";
+		clocks = <&rk808 RK808_CLKOUT1>;
+		clock-names = "ext_clock";
+		pinctrl-names = "default";
+		pinctrl-0 = <&wifi_enable>;
+		reset-gpios = <&gpio4 RK_PD4 GPIO_ACTIVE_LOW>;
+	};
+
+	vbat_wl: wifi-regulator {
+		compatible = "regulator-fixed";
+		regulator-name = "vbat_wl";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		vin-supply = <&vcc_io>;
+	};
 };
 
 &emmc {
@@ -24,3 +42,35 @@
 	mmc-ddr-1_8v;
 	status = "okay";
 };
+
+&io_domains {
+	wifi-supply = <&vcc_18>;
+};
+
+&pinctrl {
+	sdio {
+		wifi_enable: wifi-enable {
+			rockchip,pins = <4 RK_PD4 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+	};
+};
+
+&sdio0 {
+	bus-width = <4>;
+	cap-sd-highspeed;
+	cap-sdio-irq;
+	disable-wp;
+	keep-power-in-suspend;
+	mmc-pwrseq = <&sdio_pwrseq>;
+	non-removable;
+	pinctrl-names = "default";
+	pinctrl-0 = <&sdio0_bus4>, <&sdio0_cmd>, <&sdio0_clk>, <&sdio0_int>;
+	max-frequency = <50000000>;
+	sd-uhs-sdr12;
+	sd-uhs-sdr25;
+	sd-uhs-sdr50;
+	sd-uhs-ddr50;
+	vmmc-supply = <&vbat_wl>;
+	vqmmc-supply = <&vcc_18>;
+	status = "okay";
+};
-- 
2.7.4