[PATCH v4 3/7] dt-bindings: mfd: LMU: Add ti,brightness-resolution

Dan Murphy
2019-05-06T19:16:49Z

Add ti,brightness-resolution to the TI LMU binding to define
whether the device uses 8-bit brightness or 11-bit brightness.

Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Dan Murphy <dmurphy@ti.com>
---

v4 - No changes - https://lore.kernel.org/patchwork/patch/1068617/

v3 - No changes added Reviewed-by Rob - https://lore.kernel.org/patchwork/patch/1058763/
v2 - New patch. Add brightness resolution to ti-lmu.txt. See patch comments
for context. - https://lore.kernel.org/patchwork/patch/1054501/

Documentation/devicetree/bindings/mfd/ti-lmu.txt | 11 +++++++++++
1 file changed, 11 insertions(+)

diff --git a/Documentation/devicetree/bindings/mfd/ti-lmu.txt b/Documentation/devicetree/bindings/mfd/ti-lmu.txt
index 160eb0a5e21a..e3efefb194c5 100644
--- a/Documentation/devicetree/bindings/mfd/ti-lmu.txt
+++ b/Documentation/devicetree/bindings/mfd/ti-lmu.txt
@@ -31,6 +31,16 @@ Optional properties:
- ramp-down-us: Current ramping from one brightness level to
the a lower brightness level.
Range from 2048 us - 117.44 s
+ - ti,brightness-resolution - This determines whether to use 8 bit brightness
+ mode or 11 bit brightness mode. If this value is
+ not set the device is defaulted to the preferred
+ 8bit brightness mode per 7.3.4.1 of the data
+ sheet. This setting can either be in the parent
+ node or as part of the LED child nodes. This
+ is determined by the part itself if the strings
+ have a common brightness register or individual
+ brightness registers.
+ The values are 255 (8bit) or 2047 (11bit).

Required node:
- backlight: All LMU devices have backlight child nodes.
@@ -217,6 +227,7 @@ lm3697@36 {
compatible = "ti,lm3697-backlight";

lcd {
+ ti,brightness-resolution = <255>;
led-sources = <0 1 2>;
ramp-up-us = <200000>;
ramp-down-us = <200000>;
--
2.21.0.5.gaeb582a983