tjh.dev / kernel
Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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dt-bindings: pwm: Add pwm-gpio

Add bindings for PWM modulated by GPIO.

Signed-off-by: Nicola Di Lieto <nicola.dilieto@gmail.com>
Co-developed-by: Stefan Wahren <wahrenst@gmx.net>
Signed-off-by: Stefan Wahren <wahrenst@gmx.net>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Dhruva Gole <d-gole@ti.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20240604-pwm-gpio-v7-1-6b67cf60db92@linaro.org
Signed-off-by: Uwe Kleine-König <ukleinek@kernel.org>

authored by

Nicola Di Lieto and committed by
Uwe Kleine-König 1577ddaa da804fa9

+46
+46
Documentation/devicetree/bindings/pwm/pwm-gpio.yaml
··· 1 + # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) 2 + %YAML 1.2 3 + --- 4 + $id: http://devicetree.org/schemas/pwm/pwm-gpio.yaml# 5 + $schema: http://devicetree.org/meta-schemas/core.yaml# 6 + 7 + title: Generic software PWM for modulating GPIOs 8 + 9 + maintainers: 10 + - Stefan Wahren <wahrenst@gmx.net> 11 + 12 + allOf: 13 + - $ref: pwm.yaml# 14 + 15 + properties: 16 + compatible: 17 + const: pwm-gpio 18 + 19 + "#pwm-cells": 20 + const: 3 21 + description: 22 + See pwm.yaml in this directory for a description of the cells format. 23 + The first cell which represents the PWM instance number must always 24 + be zero. 25 + 26 + gpios: 27 + description: 28 + GPIO to be modulated 29 + maxItems: 1 30 + 31 + required: 32 + - compatible 33 + - "#pwm-cells" 34 + - gpios 35 + 36 + additionalProperties: false 37 + 38 + examples: 39 + - | 40 + #include <dt-bindings/gpio/gpio.h> 41 + 42 + pwm { 43 + #pwm-cells = <3>; 44 + compatible = "pwm-gpio"; 45 + gpios = <&gpio 1 GPIO_ACTIVE_HIGH>; 46 + };