path: root/Documentation/devicetree/bindings/pwm
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authorLaurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>2013-07-18 00:54:21 +0200
committerThierry Reding <thierry.reding@gmail.com>2013-09-03 13:08:09 +0200
commit9344dade4f9438c26f7eb517caeceee4d52a3a68 (patch)
treebb03808265ef5c1d4d1a95b95d7b4eecdb89d074 /Documentation/devicetree/bindings/pwm
parentcfb9e4c40e87dffdce96d3a95c33d01f441b2470 (diff)
pwm: Add PWM polarity flag macro for DT
Define a PWM_POLARITY_INVERTED macro in include/dt-bindings/pwm/pwm.h to be used by device tree sources. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Reviewed-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
Diffstat (limited to 'Documentation/devicetree/bindings/pwm')
1 files changed, 4 insertions, 3 deletions
diff --git a/Documentation/devicetree/bindings/pwm/pwm.txt b/Documentation/devicetree/bindings/pwm/pwm.txt
index 06e67247859a..8556263b8502 100644
--- a/Documentation/devicetree/bindings/pwm/pwm.txt
+++ b/Documentation/devicetree/bindings/pwm/pwm.txt
@@ -43,13 +43,14 @@ because the name "backlight" would be used as fallback anyway.
pwm-specifier typically encodes the chip-relative PWM number and the PWM
period in nanoseconds.
-Optionally, the pwm-specifier can encode a number of flags in a third cell:
-- bit 0: PWM signal polarity (0: normal polarity, 1: inverse polarity)
+Optionally, the pwm-specifier can encode a number of flags (defined in
+<dt-bindings/pwm/pwm.h>) in a third cell:
+- PWM_POLARITY_INVERTED: invert the PWM signal polarity
Example with optional PWM specifier for inverse polarity
bl: backlight {
- pwms = <&pwm 0 5000000 1>;
+ pwms = <&pwm 0 5000000 PWM_POLARITY_INVERTED>;
pwm-names = "backlight";

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