bindings/pwm/google%2Ccros-ec-pwm.yaml

0001 # SPDX-License-Identifier: GPL-2.0
0002 %YAML 1.2
0003 ---
0004 $id: http://devicetree.org/schemas/pwm/google,cros-ec-pwm.yaml#
0005 $schema: http://devicetree.org/meta-schemas/core.yaml#
0006
0007 title: PWM controlled by ChromeOS EC
0008
0009 maintainers:
0010   - Thierry Reding <thierry.reding@gmail.com>
0011   - '"Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>'
0012
0013 description: |
0014   Google's ChromeOS EC PWM is a simple PWM attached to the Embedded Controller
0015   (EC) and controlled via a host-command interface.
0016   An EC PWM node should be only found as a sub-node of the EC node (see
0017   Documentation/devicetree/bindings/mfd/google,cros-ec.yaml).
0018
0019 allOf:
0020   - $ref: pwm.yaml#
0021
0022 properties:
0023   compatible:
0024     oneOf:
0025       - description: PWM controlled using EC_PWM_TYPE_GENERIC channels.
0026         items:
0027           - const: google,cros-ec-pwm
0028       - description: PWM controlled using CROS_EC_PWM_DT_<...> types.
0029         items:
0030           - const: google,cros-ec-pwm-type
0031
0032   "#pwm-cells":
0033     description: The cell specifies the PWM index.
0034     const: 1
0035
0036 required:
0037   - compatible
0038   - '#pwm-cells'
0039
0040 additionalProperties: false
0041
0042 examples:
0043   - |
0044     spi {
0045         #address-cells = <1>;
0046         #size-cells = <0>;
0047
0048         cros-ec@0 {
0049             compatible = "google,cros-ec-spi";
0050             reg = <0>;
0051
0052             cros_ec_pwm: pwm {
0053                 compatible = "google,cros-ec-pwm";
0054                 #pwm-cells = <1>;
0055             };
0056         };
0057     };