1 # SPDX-License-Identifier: GPL-2.0-only OR BSD 1 # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
2 %YAML 1.2 2 %YAML 1.2
3 --- 3 ---
4 $id: http://devicetree.org/schemas/pwm/clk-pwm 4 $id: http://devicetree.org/schemas/pwm/clk-pwm.yaml#
5 $schema: http://devicetree.org/meta-schemas/co 5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6 6
7 title: Clock based PWM controller 7 title: Clock based PWM controller
8 8
9 maintainers: 9 maintainers:
10 - Nikita Travkin <nikita@trvn.ru> 10 - Nikita Travkin <nikita@trvn.ru>
11 11
12 description: | 12 description: |
13 Some systems have clocks that can be exposed 13 Some systems have clocks that can be exposed to external devices.
14 (e.g. by muxing them to GPIO pins) 14 (e.g. by muxing them to GPIO pins)
15 It's often possible to control duty-cycle of 15 It's often possible to control duty-cycle of such clocks which makes them
16 suitable for generating PWM signal. 16 suitable for generating PWM signal.
17 17
18 allOf: 18 allOf:
19 - $ref: pwm.yaml# 19 - $ref: pwm.yaml#
20 20
21 properties: 21 properties:
22 compatible: 22 compatible:
23 const: clk-pwm 23 const: clk-pwm
24 24
25 clocks: 25 clocks:
26 description: Clock used to generate the si 26 description: Clock used to generate the signal.
27 maxItems: 1 27 maxItems: 1
28 28
29 "#pwm-cells": 29 "#pwm-cells":
30 const: 2 30 const: 2
31 31
32 unevaluatedProperties: false 32 unevaluatedProperties: false
33 33
34 required: 34 required:
35 - compatible 35 - compatible
36 - clocks 36 - clocks
37 37
38 examples: 38 examples:
39 - | 39 - |
40 pwm { 40 pwm {
41 compatible = "clk-pwm"; 41 compatible = "clk-pwm";
42 #pwm-cells = <2>; 42 #pwm-cells = <2>;
43 clocks = <&gcc 0>; 43 clocks = <&gcc 0>;
44 pinctrl-names = "default"; 44 pinctrl-names = "default";
45 pinctrl-0 = <&pwm_clk_flash_default>; 45 pinctrl-0 = <&pwm_clk_flash_default>;
46 }; 46 };
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