summaryrefslogtreecommitdiffstats
path: root/Documentation
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2019-05-14 10:45:03 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2019-05-14 10:45:03 -0700
commite0654264c4806dc436b291294a0fbf9be7571ab6 (patch)
tree62988a8b9bed18fb5c60335f3c7cc8be2560f055 /Documentation
parentebcf5bb28241fe3ddc9e786e3816848a10f688b8 (diff)
parent8fbce8efe15cd2ca7a4947bc814f890dbe4e43d7 (diff)
downloadlinux-e0654264c4806dc436b291294a0fbf9be7571ab6.tar.bz2
Merge tag 'backlight-next-5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight
Pull backlight updates from Lee Jones: "Fix-ups: - Remove unused BACKLIGHT_LCD_SUPPORT symbol - Remove unused BACKLIGHT_CLASS_DEVICE dependencies - Add DT support to lm3630a_bl Bug Fixes: - Fix error path issues in lm3630a_bl" * tag 'backlight-next-5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight: backlight: lm3630a: Add firmware node support dt-bindings: backlight: Add lm3630a bindings backlight: lm3630a: Return 0 on success in update_status functions video: lcd: Remove useless BACKLIGHT_CLASS_DEVICE dependencies video: backlight: Remove useless BACKLIGHT_LCD_SUPPORT kernel symbol
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/devicetree/bindings/leds/backlight/lm3630a-backlight.yaml129
1 files changed, 129 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/leds/backlight/lm3630a-backlight.yaml b/Documentation/devicetree/bindings/leds/backlight/lm3630a-backlight.yaml
new file mode 100644
index 000000000000..4d61fe0a98a4
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/backlight/lm3630a-backlight.yaml
@@ -0,0 +1,129 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/leds/backlight/lm3630a-backlight.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: TI LM3630A High-Efficiency Dual-String White LED
+
+maintainers:
+ - Lee Jones <lee.jones@linaro.org>
+ - Daniel Thompson <daniel.thompson@linaro.org>
+ - Jingoo Han <jingoohan1@gmail.com>
+
+description: |
+ The LM3630A is a current-mode boost converter which supplies the power and
+ controls the current in up to two strings of 10 LEDs per string.
+ https://www.ti.com/product/LM3630A
+
+properties:
+ compatible:
+ const: ti,lm3630a
+
+ reg:
+ maxItems: 1
+
+ ti,linear-mapping-mode:
+ description: |
+ Enable linear mapping mode. If disabled, then it will use exponential
+ mapping mode in which the ramp up/down appears to have a more uniform
+ transition to the human eye.
+ type: boolean
+
+required:
+ - compatible
+ - reg
+
+patternProperties:
+ "^led@[01]$":
+ type: object
+ description: |
+ Properties for a string of connected LEDs.
+
+ properties:
+ reg:
+ description: |
+ The control bank that is used to program the two current sinks. The
+ LM3630A has two control banks (A and B) and are represented as 0 or 1
+ in this property. The two current sinks can be controlled
+ independently with both banks, or bank A can be configured to control
+ both sinks with the led-sources property.
+ maxItems: 1
+ minimum: 0
+ maximum: 1
+
+ label:
+ maxItems: 1
+
+ led-sources:
+ allOf:
+ - minItems: 1
+ maxItems: 2
+ items:
+ minimum: 0
+ maximum: 1
+
+ default-brightness:
+ description: Default brightness level on boot.
+ minimum: 0
+ maximum: 255
+
+ max-brightness:
+ description: Maximum brightness that is allowed during runtime.
+ minimum: 0
+ maximum: 255
+
+ required:
+ - reg
+
+ additionalProperties: false
+
+additionalProperties: false
+
+examples:
+ - |
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ led-controller@38 {
+ compatible = "ti,lm3630a";
+ reg = <0x38>;
+
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ led@0 {
+ reg = <0>;
+ led-sources = <0 1>;
+ label = "lcd-backlight";
+ default-brightness = <200>;
+ max-brightness = <255>;
+ };
+ };
+ };
+ - |
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ led-controller@38 {
+ compatible = "ti,lm3630a";
+ reg = <0x38>;
+
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ led@0 {
+ reg = <0>;
+ default-brightness = <150>;
+ ti,linear-mapping-mode;
+ };
+
+ led@1 {
+ reg = <1>;
+ default-brightness = <225>;
+ ti,linear-mapping-mode;
+ };
+ };
+ };