arm64: dts: qcom: pm660l: Add WLED support

This will enable backlight control on WLED-enabled devices.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@somainline.org>
Signed-off-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Link: https://lore.kernel.org/r/20210728222542.54269-22-konrad.dybcio@somainline.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

arch/arm64/boot/dts/qcom/pm660l.dtsi

@@ -31,6 +31,23 @@
 		reg = <0x3 SPMI_USID>;
 		#address-cells = <1>;
 		#size-cells = <0>;
+
+		pm660l_wled: leds@d800 {
+			compatible = "qcom,pm660l-wled";
+			reg = <0xd800 0xd900>;
+			interrupts = <0x3 0xd8 0x1 IRQ_TYPE_EDGE_RISING>;
+			interrupt-names = "ovp";
+			label = "backlight";
+
+			qcom,switching-freq = <800>;
+			qcom,ovp-millivolt = <29600>;
+			qcom,current-boost-limit = <970>;
+			qcom,current-limit-microamp = <20000>;
+			qcom,num-strings = <2>;
+			qcom,enabled-strings = <0 1>;
+
+			status = "disabled";
+		};
 	};
 };