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[PATCH v2 3/4] doc: dt: pwm: add binding for ChromeOS EC PWM

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The ChromeOS Embedded Controller can support controlling its attached
PWMs via its host-command interface. The number of supported PWMs varies
on a per-board basis, but we can autodetect this by checking the error
codes, so we don't need an extra property for this. And because the EC
only allows specifying the duty cycle and not the period, we don't
specify the period via pwm-cells, and instead have only support 1 cell
-- to specify the index.

Signed-off-by: Brian Norris <briannorris@chromium.org>
---
v2: dropped the "google,max-pwms" property

 .../devicetree/bindings/pwm/google,cros-ec-pwm.txt | 23 ++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pwm/google,cros-ec-pwm.txt

diff --git a/Documentation/devicetree/bindings/pwm/google,cros-ec-pwm.txt b/Documentation/devicetree/bindings/pwm/google,cros-ec-pwm.txt
new file mode 100644
index 000000000000..472bd46ab5a4
--- /dev/null
+++ b/Documentation/devicetree/bindings/pwm/google,cros-ec-pwm.txt
@@ -0,0 +1,23 @@
+* PWM controlled by ChromeOS EC
+
+Google's ChromeOS EC PWM is a simple PWM attached to the Embedded Controller
+(EC) and controlled via a host-command interface.
+
+An EC PWM node should be only found as a sub-node of the EC node (see
+Documentation/devicetree/bindings/mfd/cros-ec.txt).
+
+Required properties:
+- compatible: Must contain "google,cros-ec-pwm"
+- #pwm-cells: Should be 1. The cell specifies the PWM index.
+
+Example:
+	cros-ec@0 {
+		compatible = "google,cros-ec-spi";
+
+		...
+
+		cros_ec_pwm: ec-pwm {
+			compatible = "google,cros-ec-pwm";
+			#pwm-cells = <1>;
+		};
+	};
-- 
2.8.0.rc3.226.g39d4020

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[PATCH v2 0/4] pwm: add support for ChromeOS EC PWM Brian Norris <briannorris@chromium.org> - 2016-06-03 03:30 +0200
  [PATCH v2 3/4] doc: dt: pwm: add binding for ChromeOS EC PWM Brian Norris <briannorris@chromium.org> - 2016-06-03 03:30 +0200
    Re: [PATCH v2 3/4] doc: dt: pwm: add binding for ChromeOS EC PWM Rob Herring <robh@kernel.org> - 2016-06-06 15:40 +0200
  [PATCH v2 2/4] mfd: cros_ec: add EC_PWM function definitions Brian Norris <briannorris@chromium.org> - 2016-06-03 03:30 +0200
  [PATCH v2 1/4] mfd: cros_ec: Add cros_ec_cmd_xfer_status helper Brian Norris <briannorris@chromium.org> - 2016-06-03 03:30 +0200

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