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| author | Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> | 2013-07-18 00:54:21 +0200 |
|---|---|---|
| committer | MyungJoo Ham <myungjoo.ham@samsung.com> | 2013-11-15 13:52:57 +0900 |
| commit | 124335d11ccdd3dd7b62fc45d0933553496eaeba (patch) | |
| tree | cbf0618d917cba6310f30a182b6f25e6e10a225b /Documentation | |
| parent | 28527b4a4abb993ed3a29c4beec31a202a773a02 (diff) | |
| download | linux-3.10-124335d11ccdd3dd7b62fc45d0933553496eaeba.tar.gz linux-3.10-124335d11ccdd3dd7b62fc45d0933553496eaeba.tar.bz2 linux-3.10-124335d11ccdd3dd7b62fc45d0933553496eaeba.zip | |
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')
| -rw-r--r-- | Documentation/devicetree/bindings/pwm/pwm.txt | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/Documentation/devicetree/bindings/pwm/pwm.txt b/Documentation/devicetree/bindings/pwm/pwm.txt index 06e67247859..8556263b850 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"; }; |