lkml.org 
[lkml]   [2022]   [Jun]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v2 05/15] dt-bindings: backlight: Add Mediatek MT6370 backlight
Date
From: ChiYuan Huang <cy_huang@richtek.com>

Add mt6370 backlight binding documentation.

Signed-off-by: ChiYuan Huang <cy_huang@richtek.com>
---
.../backlight/mediatek,mt6370-backlight.yaml | 107 ++++++++++++++++++
1 file changed, 107 insertions(+)
create mode 100644 Documentation/devicetree/bindings/leds/backlight/mediatek,mt6370-backlight.yaml

diff --git a/Documentation/devicetree/bindings/leds/backlight/mediatek,mt6370-backlight.yaml b/Documentation/devicetree/bindings/leds/backlight/mediatek,mt6370-backlight.yaml
new file mode 100644
index 000000000000..25a05e607e83
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/backlight/mediatek,mt6370-backlight.yaml
@@ -0,0 +1,107 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/leds/backlight/mediatek,mt6370-backlight.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Mediatek MT6370 Backlight
+
+maintainers:
+ - ChiaEn Wu <chiaen_wu@richtek.com>
+
+description: |
+ This module is part of the MT6370 MFD device.
+ The MT6370 Backlight WLED driver supports up to a 29V output voltage for
+ 4 channels of 8 series WLEDs. Each channel supports up to 30mA of current
+ capability with 2048 current steps (11 bits) in exponential or linear
+ mapping curves.
+
+allOf:
+ - $ref: common.yaml#
+
+properties:
+ compatible:
+ const: mediatek,mt6370-backlight
+
+ default-brightness:
+ minimum: 0
+ maximum: 2048
+
+ max-brightness:
+ minimum: 0
+ maximum: 2048
+
+ enable-gpios:
+ description: External backlight 'enable' pin
+ maxItems: 1
+
+ mediatek,bled-pwm-enable:
+ description: |
+ Enable external PWM input for backlight dimming
+ type: boolean
+
+ mediatek,bled-pwm-hys-enable:
+ description: |
+ Enable the backlight input-hysteresis for PWM mode
+ type: boolean
+
+ mediatek,bled-pwm-hys-input-bit:
+ $ref: /schemas/types.yaml#/definitions/uint8
+ enum: [0, 1, 2, 3]
+ description: |
+ The selection of the upper and lower bounds threshold of backlight
+ PWM resolution. If we choose selection 3 (6 bits), the variation of PWM
+ resolution needs over than 64 steps (2^6).
+ value mapping:
+ - 0: 1
+ - 1: 2
+ - 2: 4
+ - 3: 6
+
+ mediatek,bled-ovp-shutdown:
+ description: |
+ Enable the backlight shutdown when OVP level triggered
+ type: boolean
+
+ mediatek,bled-ovp-microvolt:
+ enum: [0, 1, 2, 3]
+ description: |
+ Backlight OVP level selection.
+ value mapping:
+ - 0: 17000000
+ - 1: 21000000
+ - 2: 25000000
+ - 3: 29000000
+
+ mediatek,bled-ocp-shutdown:
+ description: |
+ Enable the backlight shutdown when OCP level triggerred.
+ type: boolean
+
+ mediatek,bled-ocp-microamp:
+ enum: [0, 1, 2, 3]
+ description: |
+ Backlight OC level selection.
+ value mapping:
+ - 0: 900000
+ - 1: 1200000
+ - 2: 1500000
+ - 3: 1800000
+
+ mediatek,bled-channel-use:
+ $ref: /schemas/types.yaml#/definitions/uint8
+ description: |
+ Backlight LED channel to be used.
+ Each bit mapping to:
+ - 0: CH4
+ - 1: CH3
+ - 2: CH2
+ - 3: CH1
+ minimum: 1
+ maximum: 15
+
+required:
+ - compatible
+ - mediatek,bled-channel-use
+
+additionalProperties: false
--
2.25.1
\
 
 \ /
  Last update: 2022-06-13 14:58    [W:0.226 / U:0.416 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site