arm64: dts: qcom: msm8996-xiaomi-*: Add LEDs

Add LEDs found on the Xiaomi MSM8996 devices. The devices share
a status RGB LED mounted on the front, as well as a PWM-driven
IR LED for remote control (sometimes known as an IR blaster).
The Mi Note 2 has an additional pair of white LEDs used as backlights
for the touchkeys driven by the PM8994 LPG block.
Signed-off-by: Yassine Oudjana <y.oudjana@protonmail.com>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20220728180120.97968-1-y.oudjana@protonmail.com

arch/arm64/boot/dts/qcom/msm8996-xiaomi-common.dtsi

@@ -58,6 +58,14 @@ key-dome {
 		};
 	};
 
+	irled {
+		compatible = "pwm-ir-tx";
+		pwms = <&pm8994_lpg 1 1000000>;
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&irled_default>;
+	};
+
 	reserved-memory {
 		memory@88800000 {
 			reg = <0x0 0x88800000 0x0 0x1400000>;
@@ -297,6 +305,41 @@ &pm8994_resin {
 	linux,code = <KEY_VOLUMEDOWN>;
 };
 
+&pm8994_lpg {
+	status = "okay";
+
+	qcom,power-source = <1>;
+};
+
+&pmi8994_lpg {
+	status = "okay";
+
+	qcom,power-source = <1>;
+
+	multi-led {
+		color = <LED_COLOR_ID_RGB>;
+		function = LED_FUNCTION_STATUS;
+
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		led@1 {
+			reg = <1>;
+			color = <LED_COLOR_ID_BLUE>;
+		};
+
+		led@2 {
+			reg = <2>;
+			color = <LED_COLOR_ID_GREEN>;
+		};
+
+		led@3 {
+			reg = <3>;
+			color = <LED_COLOR_ID_RED>;
+		};
+	};
+};
+
 &slpi_pil {
 	status = "okay";
 
@@ -608,6 +651,17 @@ vdd_gfx: s2 {
 };
 
 &pm8994_gpios {
+	irled_default: irled-default {
+		pinconf {
+			pins = "gpio5";
+			function = PMIC_GPIO_FUNC_FUNC1;
+			output-low;
+			qcom,drive-strength = <PMIC_GPIO_STRENGTH_HIGH>;
+			power-source = <PM8994_GPIO_S4>;
+			bias-disable;
+		};
+	};
+
 	wlan_en_default: wlan-en-state {
 		pins = "gpio8";
 		function = PMIC_GPIO_FUNC_NORMAL;

arch/arm64/boot/dts/qcom/msm8996-xiaomi-scorpio.dts

@@ -116,6 +116,25 @@ &mss_pil {
 			"qcom/msm8996/scorpio/modem.mbn";
 };
 
+&pm8994_lpg {
+	pinctrl-names = "default";
+	pinctrl-0 = <&keypad_default>;
+
+	led@3 {
+		reg = <3>;
+		color = <LED_COLOR_ID_WHITE>;
+		function = LED_FUNCTION_KBD_BACKLIGHT;
+		function-enumerator = <1>;
+	};
+
+	led@6 {
+		reg = <6>;
+		color = <LED_COLOR_ID_WHITE>;
+		function = LED_FUNCTION_KBD_BACKLIGHT;
+		function-enumerator = <0>;
+	};
+};
+
 &q6asmdai {
 	dai@0 {
 		reg = <0>;
@@ -258,6 +277,17 @@ &pm8994_gpios {
 		"PMIC_SLB",		/* GPIO_20 */
 		"UIM_BATT_ALARM",	/* GPIO_21 */
 		"NC";			/* GPIO_22 */
+
+	keypad_default: keypad-default {
+		pinconf {
+			pins = "gpio7", "gpio10";
+			function = PMIC_GPIO_FUNC_FUNC1;
+			output-low;
+			qcom,drive-strength = <PMIC_GPIO_STRENGTH_LOW>;
+			power-source = <PM8994_GPIO_S4>;
+			bias-disable;
+		};
+	};
 };
 
 &pm8994_mpps {