[PATCH RFC 1/3] dt-bindings: hwmon: Add tachometer interrupt to pwm-fan

[Stefan Wahren]

This adds the tachometer interrupt to the pwm-fan binding, which is
necessary for RPM support.

Signed-off-by: Stefan Wahren <stefan.wahren@xxxxxxxx>
---
 Documentation/devicetree/bindings/hwmon/pwm-fan.txt | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/devicetree/bindings/hwmon/pwm-fan.txt b/Documentation/devicetree/bindings/hwmon/pwm-fan.txt
index 49ca5d8..7f69b0b 100644
--- a/Documentation/devicetree/bindings/hwmon/pwm-fan.txt
+++ b/Documentation/devicetree/bindings/hwmon/pwm-fan.txt
@@ -8,6 +8,9 @@ Required properties:
 
 Optional properties:
 - fan-supply    : phandle to the regulator that provides power to the fan
+- interrupts    : contains a single interrupt specifier which describes the
+                  tachometer pin output of a 2 pulse-per-revolution fan.
+                  See interrupt-controller/interrupts.txt for the format.
 
 Example:
 	fan0: pwm-fan {
-- 
2.7.4