arm64: dts: visconti: Add PWM support for TMPV7708 SoC

Add PWM node in TMPV7708's dtsi, and tmpv7708-rm-mbrc boards's dts.
Signed-off-by: Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>

arch/arm64/boot/dts/toshiba/tmpv7708-rm-mbrc.dts

@@ -68,3 +68,11 @@ &wdt {
 &gpio {
 	status = "okay";
 };
+
+&pwm_mux {
+	groups = "pwm0_gpio16_grp", "pwm1_gpio17_grp", "pwm2_gpio18_grp", "pwm3_gpio19_grp";
+};
+
+&pwm {
+	status = "okay";
+};

arch/arm64/boot/dts/toshiba/tmpv7708.dtsi

@@ -432,6 +432,15 @@ wdt: wdt@28330000 {
 			reg = <0 0x28330000 0 0x1000>;
 			status = "disabled";
 		};
+
+		pwm: pwm@241c0000 {
+			compatible = "toshiba,visconti-pwm";
+			reg = <0 0x241c0000 0 0x1000>;
+			pinctrl-names = "default";
+			pinctrl-0 = <&pwm_mux>;
+			#pwm-cells = <2>;
+			status = "disabled";
+		};
 	};
 };
 

arch/arm64/boot/dts/toshiba/tmpv7708_pins.dtsi

@@ -90,4 +90,9 @@ i2c8_pins: i2c8-pins {
 		groups = "i2c8_grp";
 		bias-pull-up;
 	};
+
+	pwm_mux: pwm_mux {
+		function = "pwm";
+	};
+
 };