Add RP1 PWM controller support

new file mode 100644
index 0000000000000..be020583fd0ba
@@ -0,0 +1,66 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pwm/raspberrypi,rp1-pwm.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Raspberry Pi RP1 PWM controller
+
+maintainers:
+  - Naushir Patuck <[email protected]>
+  - Andrea della Porta <[email protected]>
+  - Stanimir Varbanov <[email protected]>
+
+allOf:
+  - $ref: pwm.yaml#
+
+description: |
+  The PWM peripheral is a flexible waveform generator with a
+  variety of operational modes. It has the following features:
+   - four independent output channels
+   - 32-bit counter widths
+   - Seven output generation modes
+   - Optional per-channel output inversion
+   - Optional duty-cycle data FIFO with DMA support
+   - Optional sigma-delta noise shaping engine
+  Serves as a fan speed provider to other nodes for a PWM-connected
+  fan.
+
+properties:
+  compatible:
+    const: raspberrypi,rp1-pwm
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  "#pwm-cells":
+    const: 3
+
+  dmas:
+    maxItems: 1
+    description: |
+      Phandle to the DMA controller and the channel specifier for
+      the duty-cycle FIFO.
+
+  dma-names:
+    items:
+      - const: tx
+
+required:
+  - compatible
+  - reg
+  - clocks
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    pwm@98000 {
+      compatible = "raspberrypi,rp1-pwm";
+      reg = <0x98000 0x100>;
+      clocks = <&rp1_clocks 17>;
+      #pwm-cells = <3>;
+    };

index 7297760868790..523789e82355e 100644
@@ -637,6 +637,13 @@ config PWM_ROCKCHIP
 	  Generic PWM framework driver for the PWM controller found on
 	  Rockchip SoCs.
 
+config PWM_RASPBERRYPI_RP1
+	tristate "RP1 PWM support"
+	depends on MISC_RP1 || COMPILE_TEST
+	depends on HAS_IOMEM
+	help
+	  PWM framework driver for Raspberry Pi RP1 controller.
+
 config PWM_SAMSUNG
 	tristate "Samsung PWM support"
 	depends on PLAT_SAMSUNG || ARCH_S5PV210 || ARCH_EXYNOS || COMPILE_TEST

index 5630a521a7cff..c07fd24f69f39 100644
@@ -57,6 +57,7 @@ obj-$(CONFIG_PWM_RENESAS_RZG2L_GPT)	+= pwm-rzg2l-gpt.o
 obj-$(CONFIG_PWM_RENESAS_RZ_MTU3)	+= pwm-rz-mtu3.o
 obj-$(CONFIG_PWM_RENESAS_TPU)	+= pwm-renesas-tpu.o
 obj-$(CONFIG_PWM_ROCKCHIP)	+= pwm-rockchip.o
+obj-$(CONFIG_PWM_RASPBERRYPI_RP1)	+= pwm-rp1.o
 obj-$(CONFIG_PWM_SAMSUNG)	+= pwm-samsung.o
 obj-$(CONFIG_PWM_SIFIVE)	+= pwm-sifive.o
 obj-$(CONFIG_PWM_SL28CPLD)	+= pwm-sl28cpld.o

index 0fc57e72632ed..748be8f1ee9e2 100644
@@ -64,6 +64,12 @@ phy1: ethernet-phy@1 {
 };
 
 &rp1_gpio {
+	fan_pwm_default_state: fan-pwm-default-state {
+		function = "pwm1";
+		pins = "gpio45";
+		bias-pull-down;
+	};
+
 	usb_vbus_default_state: usb-vbus-default-state {
 		function = "vbus1";
 		groups = "vbus1";

@@ -94,6 +100,12 @@ &rp1_i2c6 {
 	pinctrl-names = "default";
 };
 
+&rp1_pwm1 {
+	pinctrl-0 = <&fan_pwm_default_state>;
+	pinctrl-names = "default";
+	status = "okay";
+};
+
 &rp1_usb0 {
 	pinctrl-0 = <&usb_vbus_default_state>;
 	pinctrl-names = "default";

index 16f5359395835..df4c2d09c8d34 100644
@@ -99,7 +99,16 @@ rp1_i2c6: i2c@40088000 {
 		clocks = <&rp1_clocks RP1_CLK_SYS>;
 		i2c-scl-rising-time-ns = <65>;
 		i2c-scl-falling-time-ns = <100>;
+		status = "disabled";
+	};
 
+	rp1_pwm1: pwm@4009c000 {
+		compatible = "raspberrypi,rp1-pwm";
+		reg = <0x00 0x4009c000  0x0 0x100>;
+		clocks = <&rp1_clocks RP1_CLK_PWM1>;
+		assigned-clocks = <&rp1_clocks RP1_CLK_PWM1>;
+		assigned-clock-rates = <50000000>;
+		#pwm-cells = <3>;
 		status = "disabled";
 	};