linux-kernel - [PATCH] arm64: dts: ti: k3-am642-sk: Enable WLAN connected to SDHCI0

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Date:   Wed, 23 Feb 2022 14:20:18 +0530
From:   Aparna M <a-m1@...com>
To:     <nm@...com>, <vigneshr@...com>, <kishon@...com>,
        <kristo@...nel.org>, <robh+dt@...nel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC:     <praneeth@...com>, <nikhil.nd@...com>
Subject: [PATCH] arm64: dts: ti: k3-am642-sk: Enable WLAN connected to SDHCI0

WL1837 module is connected to SDHCI0 in AM642 SK. Enable it here.
This will enable the WiFi functionaliy on the board.

Signed-off-by: Kishon Vijay Abraham I <kishon@...com>
Signed-off-by: Vignesh Raghavendra <vigneshr@...com>
Signed-off-by: Nikhil Devshatwar <nikhil.nd@...com>
Signed-off-by: Aparna M <a-m1@...com>
---
 arch/arm64/boot/dts/ti/k3-am642-sk.dts | 62 ++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-am642-sk.dts b/arch/arm64/boot/dts/ti/k3-am642-sk.dts
index 6b04745147be..1178bb982f05 100644
--- a/arch/arm64/boot/dts/ti/k3-am642-sk.dts
+++ b/arch/arm64/boot/dts/ti/k3-am642-sk.dts
@@ -125,6 +125,31 @@
 		vin-supply = <&vcc_3v3_sys>;
 		gpio = <&exp1 3 GPIO_ACTIVE_HIGH>;
 	};
+
+	com8_ls_en: fixed-regulator-com8 {
+		compatible = "regulator-fixed";
+		regulator-name = "com8_ls_en";
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-always-on;
+		regulator-boot-on;
+		pinctrl-0 = <&main_com8_ls_en_pins_default>;
+		pinctrl-names = "default";
+		gpio = <&main_gpio0 62 GPIO_ACTIVE_LOW>;
+	};
+
+	wlan_en: fixed-regulator-wlan {
+		/* output of SN74AVC4T245RSVR */
+		compatible = "regulator-fixed";
+		regulator-name = "wlan_en";
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <1800000>;
+		enable-active-high;
+		pinctrl-0 = <&main_wlan_en_pins_default>;
+		pinctrl-names = "default";
+		vin-supply = <&com8_ls_en>;
+		gpio = <&main_gpio0 48 GPIO_ACTIVE_HIGH>;
+	};
 };
 
 &main_pmx0 {
@@ -216,6 +241,23 @@
 			AM64X_IOPAD(0x0270, PIN_INPUT, 0) /* (D18) ECAP0_IN_APWM_OUT */
 		>;
 	};
+	main_wlan_en_pins_default: main-wlan-en-pins-default {
+		pinctrl-single,pins = <
+			AM64X_IOPAD(0x00c4, PIN_OUTPUT_PULLUP, 7) /* (V8) GPIO0_48 */
+		>;
+	};
+
+	main_com8_ls_en_pins_default: main-com8-ls-en-pins-default {
+		pinctrl-single,pins = <
+			AM64X_IOPAD(0x00fc, PIN_OUTPUT, 7) /* (U7) PRG1_PRU0_GPO17.GPIO0_62 */
+		>;
+	};
+
+	main_wlan_pins_default: main-wlan-pins-default {
+		pinctrl-single,pins = <
+			AM64X_IOPAD(0x00bc, PIN_INPUT, 7) /* (U8) GPIO0_46 */
+		>;
+	};
 };
 
 &mcu_uart0 {
@@ -293,6 +335,26 @@
 	status = "reserved";
 };
 
+&sdhci0 {
+	vmmc-supply = <&wlan_en>;
+	bus-width = <4>;
+	non-removable;
+	cap-power-off-card;
+	keep-power-in-suspend;
+	ti,driver-strength-ohm = <50>;
+
+	#address-cells = <1>;
+	#size-cells = <0>;
+	wlcore: wlcore@2 {
+		compatible = "ti,wl1837";
+		reg = <2>;
+		pinctrl-0 = <&main_wlan_pins_default>;
+		pinctrl-names = "default";
+		interrupt-parent = <&main_gpio0>;
+		interrupts = <46 IRQ_TYPE_EDGE_FALLING>;
+	};
+};
+
 &sdhci1 {
 	/* SD/MMC */
 	vmmc-supply = <&vdd_mmc1>;
-- 
2.17.1