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Merge tag 'pwm/for-5.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm
Pull pwm updates from Thierry Reding: "This adds support for the PWM controller found on Toshiba Visconti SoCs and converts a couple of drivers to the atomic API. There's also a bunch of cleanups and minor fixes across the board" * tag 'pwm/for-5.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm: (35 commits) pwm: Reword docs about pwm_apply_state() pwm: atmel: Improve duty cycle calculation in .apply() pwm: atmel: Fix duty cycle calculation in .get_state() pwm: visconti: Add Toshiba Visconti SoC PWM support dt-bindings: pwm: Add bindings for Toshiba Visconti PWM Controller arm64: dts: rockchip: Remove clock-names from PWM nodes ARM: dts: rockchip: Remove clock-names from PWM nodes dt-bindings: pwm: rockchip: Add more compatible strings dt-bindings: pwm: Convert pwm-rockchip.txt to YAML pwm: mediatek: Remove unused function pwm: pca9685: Improve runtime PM behavior pwm: pca9685: Support hardware readout pwm: pca9685: Switch to atomic API pwm: lpss: Don't modify HW state in .remove callback pwm: sti: Free resources only after pwmchip_remove() pwm: sti: Don't modify HW state in .remove callback pwm: lpc3200: Don't modify HW state in .remove callback pwm: lpc18xx-sct: Free resources only after pwmchip_remove() pwm: bcm-kona: Don't modify HW state in .remove callback pwm: bcm2835: Free resources only after pwmchip_remove() ...
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‎Documentation/devicetree/bindings/pwm/pwm-rockchip.txt

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This file was deleted.

‎Documentation/devicetree/bindings/pwm/pwm-rockchip.yaml

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# SPDX-License-Identifier: GPL-2.0
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/pwm/pwm-rockchip.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Rockchip PWM controller
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maintainers:
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- Heiko Stuebner <[email protected]>
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properties:
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compatible:
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oneOf:
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- const: rockchip,rk2928-pwm
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- const: rockchip,rk3288-pwm
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- const: rockchip,rk3328-pwm
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- const: rockchip,vop-pwm
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- items:
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- const: rockchip,rk3036-pwm
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- const: rockchip,rk2928-pwm
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- items:
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- enum:
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- rockchip,rk3368-pwm
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- rockchip,rk3399-pwm
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- rockchip,rv1108-pwm
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- const: rockchip,rk3288-pwm
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- items:
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- enum:
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- rockchip,px30-pwm
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- rockchip,rk3308-pwm
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- const: rockchip,rk3328-pwm
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reg:
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maxItems: 1
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clocks:
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minItems: 1
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maxItems: 2
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clock-names:
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maxItems: 2
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"#pwm-cells":
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enum: [2, 3]
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description:
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Must be 2 (rk2928) or 3 (rk3288 and later).
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See pwm.yaml for a description of the cell format.
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required:
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- compatible
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- reg
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- "#pwm-cells"
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if:
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properties:
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compatible:
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contains:
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enum:
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- rockchip,rk3328-pwm
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- rockchip,rv1108-pwm
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then:
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properties:
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clocks:
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items:
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- description: Used to derive the functional clock for the device.
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- description: Used as the APB bus clock.
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clock-names:
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items:
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- const: pwm
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- const: pclk
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required:
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- clocks
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- clock-names
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else:
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properties:
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clocks:
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maxItems: 1
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description:
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Used both to derive the functional clock
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for the device and as the bus clock.
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required:
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- clocks
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additionalProperties: false
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examples:
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- |
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#include <dt-bindings/clock/rk3188-cru-common.h>
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pwm0: pwm@20030000 {
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compatible = "rockchip,rk2928-pwm";
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reg = <0x20030000 0x10>;
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clocks = <&cru PCLK_PWM01>;
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#pwm-cells = <2>;
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};

‎Documentation/devicetree/bindings/pwm/toshiba,pwm-visconti.yaml

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# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/pwm/toshiba,pwm-visconti.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Toshiba Visconti PWM Controller
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maintainers:
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- Nobuhiro Iwamatsu <[email protected]>
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properties:
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compatible:
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items:
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- const: toshiba,visconti-pwm
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reg:
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maxItems: 1
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'#pwm-cells':
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const: 2
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required:
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- compatible
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- reg
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- '#pwm-cells'
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additionalProperties: false
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examples:
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- |
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soc {
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#address-cells = <2>;
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#size-cells = <2>;
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pwm: pwm@241c0000 {
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compatible = "toshiba,visconti-pwm";
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reg = <0 0x241c0000 0 0x1000>;
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pinctrl-names = "default";
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pinctrl-0 = <&pwm_mux>;
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#pwm-cells = <2>;
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};
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};

‎Documentation/driver-api/pwm.rst

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@@ -55,7 +55,11 @@ several parameter at once. For example, if you see pwm_config() and
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pwm_{enable,disable}() calls in the same function, this probably means you
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should switch to pwm_apply_state().
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The PWM user API also allows one to query the PWM state with pwm_get_state().
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The PWM user API also allows one to query the PWM state that was passed to the
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last invocation of pwm_apply_state() using pwm_get_state(). Note this is
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different to what the driver has actually implemented if the request cannot be
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satisfied exactly with the hardware in use. There is currently no way for
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consumers to get the actually implemented settings.
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In addition to the PWM state, the PWM API also exposes PWM arguments, which
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are the reference PWM config one should use on this PWM.

‎arch/arm/boot/dts/rk3036.dtsi

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reg = <0x20050000 0x10>;
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#pwm-cells = <3>;
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clocks = <&cru PCLK_PWM>;
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clock-names = "pwm";
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pinctrl-names = "default";
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pinctrl-0 = <&pwm0_pin>;
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status = "disabled";
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reg = <0x20050010 0x10>;
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#pwm-cells = <3>;
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clocks = <&cru PCLK_PWM>;
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clock-names = "pwm";
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pinctrl-names = "default";
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pinctrl-0 = <&pwm1_pin>;
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status = "disabled";
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reg = <0x20050020 0x10>;
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#pwm-cells = <3>;
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clocks = <&cru PCLK_PWM>;
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clock-names = "pwm";
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pinctrl-names = "default";
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pinctrl-0 = <&pwm2_pin>;
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status = "disabled";
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reg = <0x20050030 0x10>;
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#pwm-cells = <2>;
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clocks = <&cru PCLK_PWM>;
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clock-names = "pwm";
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pinctrl-names = "default";
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pinctrl-0 = <&pwm3_pin>;
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status = "disabled";

‎arch/arm/boot/dts/rk3288.dtsi

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pinctrl-names = "default";
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pinctrl-0 = <&pwm0_pin>;
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clocks = <&cru PCLK_RKPWM>;
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clock-names = "pwm";
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status = "disabled";
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};
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pinctrl-names = "default";
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pinctrl-0 = <&pwm1_pin>;
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clocks = <&cru PCLK_RKPWM>;
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clock-names = "pwm";
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status = "disabled";
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};
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pinctrl-names = "default";
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pinctrl-0 = <&pwm2_pin>;
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clocks = <&cru PCLK_RKPWM>;
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clock-names = "pwm";
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status = "disabled";
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};
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pinctrl-names = "default";
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pinctrl-0 = <&pwm3_pin>;
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clocks = <&cru PCLK_RKPWM>;
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clock-names = "pwm";
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status = "disabled";
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};
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‎arch/arm64/boot/dts/rockchip/rk3368.dtsi

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pinctrl-names = "default";
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pinctrl-0 = <&pwm0_pin>;
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clocks = <&cru PCLK_PWM1>;
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clock-names = "pwm";
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status = "disabled";
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};
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pinctrl-names = "default";
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pinctrl-0 = <&pwm1_pin>;
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clocks = <&cru PCLK_PWM1>;
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clock-names = "pwm";
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status = "disabled";
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};
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reg = <0x0 0xff680020 0x0 0x10>;
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#pwm-cells = <3>;
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clocks = <&cru PCLK_PWM1>;
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clock-names = "pwm";
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status = "disabled";
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};
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pinctrl-names = "default";
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pinctrl-0 = <&pwm3_pin>;
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clocks = <&cru PCLK_PWM1>;
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clock-names = "pwm";
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status = "disabled";
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};
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‎arch/arm64/boot/dts/rockchip/rk3399.dtsi

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pinctrl-names = "default";
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pinctrl-0 = <&pwm0_pin>;
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clocks = <&pmucru PCLK_RKPWM_PMU>;
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clock-names = "pwm";
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status = "disabled";
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};
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pinctrl-names = "default";
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pinctrl-0 = <&pwm1_pin>;
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clocks = <&pmucru PCLK_RKPWM_PMU>;
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clock-names = "pwm";
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status = "disabled";
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};
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pinctrl-names = "default";
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pinctrl-0 = <&pwm2_pin>;
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clocks = <&pmucru PCLK_RKPWM_PMU>;
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clock-names = "pwm";
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status = "disabled";
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};
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pinctrl-names = "default";
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pinctrl-0 = <&pwm3a_pin>;
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clocks = <&pmucru PCLK_RKPWM_PMU>;
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clock-names = "pwm";
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status = "disabled";
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};
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‎drivers/pwm/Kconfig

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To compile this driver as a module, choose M here: the module
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will be called pwm-twl-led.
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config PWM_VISCONTI
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tristate "Toshiba Visconti PWM support"
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depends on ARCH_VISCONTI || COMPILE_TEST
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help
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PWM Subsystem driver support for Toshiba Visconti SoCs.
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To compile this driver as a module, choose M here: the module
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will be called pwm-visconti.
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config PWM_VT8500
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tristate "vt8500 PWM support"
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depends on ARCH_VT8500 || COMPILE_TEST

‎drivers/pwm/Makefile

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obj-$(CONFIG_PWM_TIEHRPWM) += pwm-tiehrpwm.o
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obj-$(CONFIG_PWM_TWL) += pwm-twl.o
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obj-$(CONFIG_PWM_TWL_LED) += pwm-twl-led.o
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obj-$(CONFIG_PWM_VISCONTI) += pwm-visconti.o
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obj-$(CONFIG_PWM_VT8500) += pwm-vt8500.o

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