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>
diff --git a/arch/arm64/boot/dts/toshiba/tmpv7708-rm-mbrc.dts b/arch/arm64/boot/dts/toshiba/tmpv7708-rm-mbrc.dts
index bf0620a..29a4d9f 100644
--- a/arch/arm64/boot/dts/toshiba/tmpv7708-rm-mbrc.dts
+++ b/arch/arm64/boot/dts/toshiba/tmpv7708-rm-mbrc.dts
@@ -68,3 +68,11 @@
 &gpio {
 	status = "okay";
 };
+
+&pwm_mux {
+	groups = "pwm0_gpio16_grp", "pwm1_gpio17_grp", "pwm2_gpio18_grp", "pwm3_gpio19_grp";
+};
+
+&pwm {
+	status = "okay";
+};
diff --git a/arch/arm64/boot/dts/toshiba/tmpv7708.dtsi b/arch/arm64/boot/dts/toshiba/tmpv7708.dtsi
index 17934fd..4b4231f 100644
--- a/arch/arm64/boot/dts/toshiba/tmpv7708.dtsi
+++ b/arch/arm64/boot/dts/toshiba/tmpv7708.dtsi
@@ -432,6 +432,15 @@
 			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";
+		};
 	};
 };
 
diff --git a/arch/arm64/boot/dts/toshiba/tmpv7708_pins.dtsi b/arch/arm64/boot/dts/toshiba/tmpv7708_pins.dtsi
index 34de000..a480c6b 100644
--- a/arch/arm64/boot/dts/toshiba/tmpv7708_pins.dtsi
+++ b/arch/arm64/boot/dts/toshiba/tmpv7708_pins.dtsi
@@ -90,4 +90,9 @@
 		groups = "i2c8_grp";
 		bias-pull-up;
 	};
+
+	pwm_mux: pwm_mux {
+		function = "pwm";
+	};
+
 };