linux-kernel - [PATCH 13/14] dt-bindings: backlight: Add Mediatek MT6370 backlight binding documentation

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Message-Id: <20220531102809.11976-14-peterwu.pub@gmail.com>
Date:   Tue, 31 May 2022 18:28:08 +0800
From:   ChiaEn Wu <peterwu.pub@...il.com>
To:     lee.jones@...aro.org, daniel.thompson@...aro.org,
        jingoohan1@...il.com, pavel@....cz, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, matthias.bgg@...il.com,
        sre@...nel.org, chunfeng.yun@...iatek.com,
        gregkh@...uxfoundation.org, jic23@...nel.org, lars@...afoo.de,
        lgirdwood@...il.com, broonie@...nel.org, linux@...ck-us.net,
        heikki.krogerus@...ux.intel.com, deller@....de
Cc:     cy_huang@...htek.com, alice_chen@...htek.com,
        chiaen_wu@...htek.com, dri-devel@...ts.freedesktop.org,
        linux-leds@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-pm@...r.kernel.org, linux-usb@...r.kernel.org,
        linux-iio@...r.kernel.org, linux-fbdev@...r.kernel.org
Subject: [PATCH 13/14] dt-bindings: backlight: Add Mediatek MT6370 backlight binding documentation

From: ChiYuan Huang <cy_huang@...htek.com>

Add mt6370 backlight binding documentation.

Signed-off-by: ChiYuan Huang <cy_huang@...htek.com>
---
 .../backlight/mediatek,mt6370-backlight.yaml  | 110 ++++++++++++++++++
 1 file changed, 110 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..81d72ed44be4
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/backlight/mediatek,mt6370-backlight.yaml
@@ -0,0 +1,110 @@
+# 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@...htek.com>
+
+description: |
+  MT6370 is a highly-integrated smart power management IC, which includes a
+  single cell Li-Ion/Li-Polymer switching battery charger, a USB Type-C &
+  Power Delivery (PD) controller, dual flash LED current sources, a RGB LED
+  driver, a backlight WLED driver, a display bias driver and a general LDO for
+  portable devices.
+
+  For the LCD backlight, it can provide 4 channel WLED driving capability.
+  Each channel driving current is up to 30mA
+
+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-sel:
+    $ref: /schemas/types.yaml#/definitions/uint8
+    enum: [0, 1, 2, 3]
+    description: |
+      Backlight PWM hysteresis input level selection.
+      value mapping:
+        - 0: 1bit
+        - 1: 2bit
+        - 2: 4bit
+        - 3: 6bit
+
+  mediatek,bled-ovp-shutdown:
+    description: |
+      Enable the backlight shutdown when OVP level triggered
+    type: boolean
+
+  mediatek,bled-ovp-level-sel:
+    $ref: /schemas/types.yaml#/definitions/uint8
+    enum: [0, 1, 2, 3]
+    description: |
+      Backlight OVP level selection.
+      value mapping:
+        - 0: 17V
+        - 1: 21V
+        - 2: 25V
+        - 3: 29V
+
+  mediatek,bled-ocp-shutdown:
+    description: |
+      Enable the backlight shutdown when OCP level triggerred.
+    type: boolean
+
+  mediatek,bled-ocp-level-sel:
+    $ref: /schemas/types.yaml#/definitions/uint8
+    enum: [0, 1, 2, 3]
+    description: |
+      Backlight OC level selection.
+      value mapping:
+        - 0: 900mA
+        - 1: 1200mA
+        - 2: 1500mA
+        - 3: 1800mA
+
+  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