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| author | Matt Ranostay <mranostay@gmail.com> | 2016-10-13 15:16:12 +0200 |
|---|---|---|
| committer | Jacek Anaszewski <j.anaszewski@samsung.com> | 2016-11-22 12:07:04 +0100 |
| commit | 35c7d30179fbc17af7281ccea18e6d74c003e448 (patch) | |
| tree | d49f1992a6f3578f64d7750396d86a2f20db6a96 /Documentation/devicetree/bindings/leds | |
| parent | cleanup LED documentation and make it match reality (diff) | |
| download | linux-35c7d30179fbc17af7281ccea18e6d74c003e448.tar.xz linux-35c7d30179fbc17af7281ccea18e6d74c003e448.zip | |
leds: pca963x: workaround group blink scaling issue
PCA9632TK part seems to incorrectly blink at ~1.3x of the programmed
rate. This patchset add a nxp,period-scale devicetree property to
adjust for this misconfiguration.
Signed-off-by: Matt Ranostay <matt@ranostay.consulting>
Cc: Tony Lindgren <tony@atomide.com>
Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
Diffstat (limited to 'Documentation/devicetree/bindings/leds')
| -rw-r--r-- | Documentation/devicetree/bindings/leds/pca963x.txt | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/leds/pca963x.txt b/Documentation/devicetree/bindings/leds/pca963x.txt index dafbe9931c2b..dfbdb123a9bf 100644 --- a/Documentation/devicetree/bindings/leds/pca963x.txt +++ b/Documentation/devicetree/bindings/leds/pca963x.txt @@ -7,6 +7,9 @@ Optional properties: - nxp,totem-pole : use totem pole (push-pull) instead of open-drain (pca9632 defaults to open-drain, newer chips to totem pole) - nxp,hw-blink : use hardware blinking instead of software blinking +- nxp,period-scale : In some configurations, the chip blinks faster than expected. + This parameter provides a scaling ratio (fixed point, decimal divided + by 1000) to compensate, e.g. 1300=1.3x and 750=0.75x. Each led is represented as a sub-node of the nxp,pca963x device. |