bindings/pwm/pwm-samsung.yaml

1 # SPDX-License-Identifier: GPL-2.0
3 ---
4 $id: http://devicetree.org/schemas/pwm/pwm-samsung.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Samsung SoC PWM timers
10   - Thierry Reding <thierry.reding@gmail.com>
11   - Krzysztof Kozlowski <krzk@kernel.org>
14   Samsung SoCs contain PWM timer blocks which can be used for system clock source
15   and clock event timers, as well as to drive SoC outputs with PWM signal. Each
16   PWM timer block provides 5 PWM channels (not all of them can drive physical
17   outputs - see SoC and board manual).
24       - enum:
25           - samsung,s3c2410-pwm             # 16-bit, S3C24xx
26           - samsung,s3c6400-pwm             # 32-bit, S3C64xx
27           - samsung,s5p6440-pwm             # 32-bit, S5P64x0
28           - samsung,s5pc100-pwm             # 32-bit, S5PC100, S5PV210, Exynos4210 rev0 SoCs
29           - samsung,exynos4210-pwm          # 32-bit, Exynos
30       - items:
31           - enum:
32               - samsung,exynosautov9-pwm
33           - const: samsung,exynos4210-pwm
42   clock-names:
45       - "timers" - PWM base clock used to generate PWM signals,
47       - "pwm-tclk0" - first external PWM clock source,
48       - "pwm-tclk1" - second external PWM clock source.
53       - items:
54           - const: timers
55       - items:
56           - const: timers
57           - const: pwm-tclk0
58       - items:
59           - const: timers
60           - const: pwm-tclk1
61       - items:
62           - const: timers
63           - const: pwm-tclk0
64           - const: pwm-tclk1
68       One interrupt per timer, starting at timer 0. Necessary only for SoCs which
69       use PWM clocksource.
73   "#pwm-cells":
79   samsung,pwm-outputs:
81       A list of PWM channels used as PWM outputs on particular platform.
82       It is an array of up to 5 elements being indices of PWM channels
83       (from 0 to 4), the order does not matter.
84     $ref: /schemas/types.yaml#/definitions/uint32-array
87       minimum: 0
91   - clocks
92   - clock-names
93   - compatible
94   - reg
99   - $ref: pwm.yaml#
101   - if:
106               - samsung,s3c2410-pwm
107               - samsung,s3c6400-pwm
108               - samsung,s5p6440-pwm
109               - samsung,s5pc100-pwm
112         - interrupts
115   - |
116     pwm@7f006000 {
117         compatible = "samsung,s3c6400-pwm";
118         reg = <0x7f006000 0x1000>;
119         interrupt-parent = <&vic0>;
122         clock-names = "timers";
123         samsung,pwm-outputs = <0>, <1>;
124         #pwm-cells = <3>;