Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

16 files changed, 1090 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/leds/backlight/88pm860x.txt b/Documentation/devicetree/bindings/leds/backlight/88pm860x.txt
new file mode 100644
index 000000000..261df2799
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/backlight/88pm860x.txt
@@ -0,0 +1,15 @@
+88pm860x-backlight bindings
+
+Optional properties:
+  - marvell,88pm860x-iset: Current supplies on backlight device.
+  - marvell,88pm860x-pwm: PWM frequency on backlight device.
+
+Example:
+
+	backlights {
+		backlight-0 {
+			marvell,88pm860x-iset = <4>;
+			marvell,88pm860x-pwm = <3>;
+		};
+		backlight-2 {
+		};
diff --git a/Documentation/devicetree/bindings/leds/backlight/arcxcnn_bl.txt b/Documentation/devicetree/bindings/leds/backlight/arcxcnn_bl.txt
new file mode 100644
index 000000000..230abdefd
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/backlight/arcxcnn_bl.txt
@@ -0,0 +1,33 @@
+Binding for ArcticSand arc2c0608 LED driver
+
+Required properties:
+- compatible:		should be "arc,arc2c0608"
+- reg:			slave address
+
+Optional properties:
+- default-brightness:	brightness value on boot, value from: 0-4095
+- label:		The name of the backlight device
+			See Documentation/devicetree/bindings/leds/common.txt
+- led-sources:		List of enabled channels from 0 to 5.
+			See Documentation/devicetree/bindings/leds/common.txt
+
+- arc,led-config-0:	setting for register ILED_CONFIG_0
+- arc,led-config-1:	setting for register ILED_CONFIG_1
+- arc,dim-freq:		PWM mode frequence setting (bits [3:0] used)
+- arc,comp-config:	setting for register CONFIG_COMP
+- arc,filter-config:	setting for register FILTER_CONFIG
+- arc,trim-config:	setting for register IMAXTUNE
+
+Note: Optional properties not specified will default to values in IC EPROM
+
+Example:
+
+arc2c0608@30 {
+	compatible = "arc,arc2c0608";
+	reg = <0x30>;
+	default-brightness = <500>;
+	label = "lcd-backlight";
+	linux,default-trigger = "backlight";
+	led-sources = <0 1 2 5>;
+};
+
diff --git a/Documentation/devicetree/bindings/leds/backlight/common.yaml b/Documentation/devicetree/bindings/leds/backlight/common.yaml
new file mode 100644
index 000000000..3b60afbab
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/backlight/common.yaml
@@ -0,0 +1,36 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/leds/backlight/common.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Common backlight properties
+
+maintainers:
+  - Lee Jones <lee@kernel.org>
+  - Daniel Thompson <daniel.thompson@linaro.org>
+  - Jingoo Han <jingoohan1@gmail.com>
+
+description:
+  Backlight devices provide backlight for different types of graphical
+  displays. They are typically but not necessarily implemented using a white
+  LED powered by a boost converter.
+
+properties:
+  default-brightness:
+    description:
+      The default brightness that should be applied to the LED by the operating
+      system on start-up. The brightness should not exceed the brightness the
+      LED can provide.
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+  max-brightness:
+    description:
+      Normally the maximum brightness is determined by the hardware and this
+      property is not required. This property is used to put a software limit
+      on the brightness apart from what the driver says, as it could happen
+      that a LED can be made so bright that it gets damaged or causes damage
+      due to restrictions in a specific system, such as mounting conditions.
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+additionalProperties: true
diff --git a/Documentation/devicetree/bindings/leds/backlight/gpio-backlight.yaml b/Documentation/devicetree/bindings/leds/backlight/gpio-backlight.yaml
new file mode 100644
index 000000000..3300451fc
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/backlight/gpio-backlight.yaml
@@ -0,0 +1,41 @@
+# SPDX-License-Identifier: GPL-2.0-only
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/leds/backlight/gpio-backlight.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: gpio-backlight bindings
+
+maintainers:
+  - Lee Jones <lee@kernel.org>
+  - Daniel Thompson <daniel.thompson@linaro.org>
+  - Jingoo Han <jingoohan1@gmail.com>
+
+properties:
+  compatible:
+    const: gpio-backlight
+
+  gpios:
+    description: The gpio that is used for enabling/disabling the backlight.
+    maxItems: 1
+
+  default-on:
+    description: enable the backlight at boot.
+    type: boolean
+
+required:
+  - compatible
+  - gpios
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    backlight {
+        compatible = "gpio-backlight";
+        gpios = <&gpio3 4 GPIO_ACTIVE_HIGH>;
+        default-on;
+    };
+
+...
diff --git a/Documentation/devicetree/bindings/leds/backlight/kinetic,ktd253.yaml b/Documentation/devicetree/bindings/leds/backlight/kinetic,ktd253.yaml
new file mode 100644
index 000000000..73fa59e62
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/backlight/kinetic,ktd253.yaml
@@ -0,0 +1,49 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/leds/backlight/kinetic,ktd253.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Kinetic Technologies KTD253 and KTD259 one-wire backlight
+
+maintainers:
+  - Linus Walleij <linus.walleij@linaro.org>
+
+description: |
+  The Kinetic Technologies KTD253 and KTD259 are white LED backlights
+  controlled by a single GPIO line. If you just turn on the backlight
+  it goes to maximum backlight then you can set the level of backlight
+  using pulses on the enable wire. This is sometimes referred to as
+  "expresswire".
+
+allOf:
+  - $ref: common.yaml#
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - kinetic,ktd253
+          - kinetic,ktd259
+
+  enable-gpios:
+    description: GPIO to use to enable/disable and dim the backlight.
+    maxItems: 1
+
+  default-brightness: true
+  max-brightness: true
+
+required:
+  - compatible
+  - enable-gpios
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    backlight {
+        compatible = "kinetic,ktd253";
+        enable-gpios = <&gpio2 5 GPIO_ACTIVE_HIGH>;
+        default-brightness = <13>;
+    };
diff --git a/Documentation/devicetree/bindings/leds/backlight/led-backlight.yaml b/Documentation/devicetree/bindings/leds/backlight/led-backlight.yaml
new file mode 100644
index 000000000..0793d0adc
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/backlight/led-backlight.yaml
@@ -0,0 +1,59 @@
+# SPDX-License-Identifier: GPL-2.0-only
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/leds/backlight/led-backlight.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: led-backlight bindings
+
+maintainers:
+  - Lee Jones <lee@kernel.org>
+  - Daniel Thompson <daniel.thompson@linaro.org>
+  - Jingoo Han <jingoohan1@gmail.com>
+
+description:
+  This binding is used to describe a basic backlight device made of LEDs. It
+  can also be used to describe a backlight device controlled by the output of
+  a LED driver.
+
+properties:
+  compatible:
+    const: led-backlight
+
+  leds:
+    description: A list of LED nodes
+    $ref: /schemas/types.yaml#/definitions/phandle-array
+    items:
+      maxItems: 1
+
+  brightness-levels:
+    description:
+      Array of distinct brightness levels. The levels must be in the range
+      accepted by the underlying LED devices. This is used to translate a
+      backlight brightness level into a LED brightness level. If it is not
+      provided, the identity mapping is used.
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+
+  default-brightness-level:
+    description:
+      The default brightness level (index into the array defined by the
+      "brightness-levels" property).
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+required:
+  - compatible
+  - leds
+
+additionalProperties: false
+
+examples:
+  - |
+    backlight {
+        compatible = "led-backlight";
+
+        leds = <&led1>, <&led2>;
+        brightness-levels = <0 4 8 16 32 64 128 255>;
+        default-brightness-level = <6>;
+    };
+
+...
diff --git a/Documentation/devicetree/bindings/leds/backlight/lm3630a-backlight.yaml b/Documentation/devicetree/bindings/leds/backlight/lm3630a-backlight.yaml
new file mode 100644
index 000000000..3c9b4054e
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/backlight/lm3630a-backlight.yaml
@@ -0,0 +1,142 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/leds/backlight/lm3630a-backlight.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: TI LM3630A High-Efficiency Dual-String White LED
+
+maintainers:
+  - Lee Jones <lee@kernel.org>
+  - Daniel Thompson <daniel.thompson@linaro.org>
+  - Jingoo Han <jingoohan1@gmail.com>
+
+description: |
+  The LM3630A is a current-mode boost converter which supplies the power and
+  controls the current in up to two strings of 10 LEDs per string.
+  https://www.ti.com/product/LM3630A
+
+properties:
+  compatible:
+    const: ti,lm3630a
+
+  reg:
+    maxItems: 1
+
+  '#address-cells':
+    const: 1
+
+  '#size-cells':
+    const: 0
+
+  enable-gpios:
+    description: GPIO to use to enable/disable the backlight (HWEN pin).
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - '#address-cells'
+  - '#size-cells'
+
+patternProperties:
+  "^led@[01]$":
+    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.
+        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
+
+      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:
+      - reg
+
+    additionalProperties: false
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        led-controller@38 {
+                compatible = "ti,lm3630a";
+                reg = <0x38>;
+                enable-gpios = <&gpio2 5 GPIO_ACTIVE_HIGH>;
+
+                #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;
+                };
+        };
+    };
diff --git a/Documentation/devicetree/bindings/leds/backlight/lp855x.txt b/Documentation/devicetree/bindings/leds/backlight/lp855x.txt
new file mode 100644
index 000000000..88f56641f
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/backlight/lp855x.txt
@@ -0,0 +1,72 @@
+lp855x bindings
+
+Required properties:
+  - compatible: "ti,lp8550", "ti,lp8551", "ti,lp8552", "ti,lp8553",
+                "ti,lp8555", "ti,lp8556", "ti,lp8557"
+  - reg: I2C slave address (u8)
+  - dev-ctrl: Value of DEVICE CONTROL register (u8). It depends on the device.
+
+Optional properties:
+  - bl-name: Backlight device name (string)
+  - init-brt: Initial value of backlight brightness (u8)
+  - pwm-period: PWM period value. Set only PWM input mode used (u32)
+  - rom-addr: Register address of ROM area to be updated (u8)
+  - rom-val: Register value to be updated (u8)
+  - power-supply: Regulator which controls the 3V rail
+  - enable-supply: Regulator which controls the EN/VDDIO input
+
+Example:
+
+	/* LP8555 */
+	backlight@2c {
+		compatible = "ti,lp8555";
+		reg = <0x2c>;
+
+		dev-ctrl = /bits/ 8 <0x00>;
+		pwm-period = <10000>;
+
+		/* 4V OV, 4 output LED0 string enabled */
+		rom_14h {
+			rom-addr = /bits/ 8 <0x14>;
+			rom-val = /bits/ 8 <0xcf>;
+		};
+
+		/* Heavy smoothing, 24ms ramp time step */
+		rom_15h {
+			rom-addr = /bits/ 8 <0x15>;
+			rom-val = /bits/ 8 <0xc7>;
+		};
+
+		/* 4 output LED1 string enabled */
+		rom_19h {
+			rom-addr = /bits/ 8 <0x19>;
+			rom-val = /bits/ 8 <0x0f>;
+		};
+	};
+
+	/* LP8556 */
+	backlight@2c {
+		compatible = "ti,lp8556";
+		reg = <0x2c>;
+
+		bl-name = "lcd-bl";
+		dev-ctrl = /bits/ 8 <0x85>;
+		init-brt = /bits/ 8 <0x10>;
+	};
+
+	/* LP8557 */
+	backlight@2c {
+		compatible = "ti,lp8557";
+		reg = <0x2c>;
+		enable-supply = <&backlight_vddio>;
+		power-supply = <&backlight_vdd>;
+
+		dev-ctrl = /bits/ 8 <0x41>;
+		init-brt = /bits/ 8 <0x0a>;
+
+		/* 4V OV, 4 output LED string enabled */
+		rom_14h {
+			rom-addr = /bits/ 8 <0x14>;
+			rom-val = /bits/ 8 <0xcf>;
+		};
+	};
diff --git a/Documentation/devicetree/bindings/leds/backlight/max8925-backlight.txt b/Documentation/devicetree/bindings/leds/backlight/max8925-backlight.txt
new file mode 100644
index 000000000..b4cffdaa4
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/backlight/max8925-backlight.txt
@@ -0,0 +1,10 @@
+88pm860x-backlight bindings
+
+Optional properties:
+  - maxim,max8925-dual-string: whether support dual string
+
+Example:
+
+	backlights {
+		maxim,max8925-dual-string = <0>;
+	};
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 000000000..5533b6562
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/backlight/mediatek,mt6370-backlight.yaml
@@ -0,0 +1,121 @@
+# 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, only for MT6370/MT6371) or
+  16384 current steps (14 bits, only for MT6372) in exponential or linear
+  mapping curves.
+
+allOf:
+  - $ref: common.yaml#
+
+properties:
+  compatible:
+    enum:
+      - mediatek,mt6370-backlight
+      - mediatek,mt6372-backlight
+
+  default-brightness:
+    minimum: 0
+
+  max-brightness:
+    minimum: 0
+
+  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-th-steps:
+    $ref: /schemas/types.yaml#/definitions/uint8
+    enum: [1, 4, 16, 64]
+    description: |
+      The selection of the upper and lower bounds threshold of backlight
+      PWM resolution. If we choose selection 64, the variation of PWM
+      resolution needs more than 64 steps.
+
+  mediatek,bled-ovp-shutdown:
+    description: |
+      Enable the backlight shutdown when OVP level triggered
+    type: boolean
+
+  mediatek,bled-ovp-microvolt:
+    enum: [17000000, 21000000, 25000000, 29000000]
+    description: |
+      Backlight OVP level selection.
+
+  mediatek,bled-ocp-shutdown:
+    description: |
+      Enable the backlight shutdown when OCP level triggerred.
+    type: boolean
+
+  mediatek,bled-ocp-microamp:
+    enum: [900000, 1200000, 1500000, 1800000]
+    description: |
+      Backlight OC level selection.
+
+  mediatek,bled-exponential-mode-enable:
+    description: |
+      Enable the exponential mode of backlight brightness. If this property
+      is not enabled, the default is to use linear mode.
+    type: boolean
+
+  mediatek,bled-channel-use:
+    $ref: /schemas/types.yaml#/definitions/uint8
+    description: |
+      Backlight LED channel to be used.
+      Each bit mapping to:
+        - 0: CH4
+        - 1: CH3
+        - 2: CH2
+        - 3: CH1
+    minimum: 1
+    maximum: 15
+
+if:
+  properties:
+    compatible:
+      contains:
+        const: mediatek,mt6372-backlight
+
+then:
+  properties:
+    default-brightness:
+      maximum: 16384
+
+    max-brightness:
+      maximum: 16384
+
+else:
+  properties:
+    default-brightness:
+      maximum: 2048
+
+    max-brightness:
+      maximum: 2048
+
+required:
+  - compatible
+  - mediatek,bled-channel-use
+
+additionalProperties: false
diff --git a/Documentation/devicetree/bindings/leds/backlight/pwm-backlight.yaml b/Documentation/devicetree/bindings/leds/backlight/pwm-backlight.yaml
new file mode 100644
index 000000000..78fbe20a1
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/backlight/pwm-backlight.yaml
@@ -0,0 +1,104 @@
+# SPDX-License-Identifier: GPL-2.0-only
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/leds/backlight/pwm-backlight.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: pwm-backlight bindings
+
+maintainers:
+  - Lee Jones <lee@kernel.org>
+  - Daniel Thompson <daniel.thompson@linaro.org>
+  - Jingoo Han <jingoohan1@gmail.com>
+
+properties:
+  compatible:
+    const: pwm-backlight
+
+  pwms:
+    maxItems: 1
+
+  pwm-names: true
+
+  power-supply:
+    description: regulator for supply voltage
+
+  enable-gpios:
+    description:
+      Contains a single GPIO specifier for the GPIO which enables and disables
+      the backlight.
+    maxItems: 1
+
+  post-pwm-on-delay-ms:
+    description:
+      Delay in ms between setting an initial (non-zero) PWM and enabling the
+      backlight using GPIO.
+
+  pwm-off-delay-ms:
+    description:
+      Delay in ms between disabling the backlight using GPIO and setting PWM
+      value to 0.
+
+  brightness-levels:
+    description:
+      Array of distinct brightness levels. Typically these are in the range
+      from 0 to 255, but any range starting at 0 will do. The actual brightness
+      level (PWM duty cycle) will be interpolated from these values. 0 means a
+      0% duty cycle (darkest/off), while the last value in the array represents
+      a 100% duty cycle (brightest).
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+
+  default-brightness-level:
+    description:
+      The default brightness level (index into the array defined by the
+      "brightness-levels" property).
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+  num-interpolated-steps:
+    description:
+      Number of interpolated steps between each value of brightness-levels
+      table. This way a high resolution pwm duty cycle can be used without
+      having to list out every possible value in the brightness-level array.
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+dependencies:
+  default-brightness-level: [brightness-levels]
+  num-interpolated-steps: [brightness-levels]
+
+required:
+  - compatible
+  - pwms
+  - power-supply
+
+additionalProperties: false
+
+examples:
+  - |
+    backlight {
+        compatible = "pwm-backlight";
+        pwms = <&pwm 0 5000000>;
+
+        brightness-levels = <0 4 8 16 32 64 128 255>;
+        default-brightness-level = <6>;
+
+        power-supply = <&vdd_bl_reg>;
+        enable-gpios = <&gpio 58 0>;
+        post-pwm-on-delay-ms = <10>;
+        pwm-off-delay-ms = <10>;
+    };
+
+  - |
+    // Example using num-interpolation-steps:
+    backlight {
+        compatible = "pwm-backlight";
+        pwms = <&pwm 0 5000000>;
+
+        brightness-levels = <0 2048 4096 8192 16384 65535>;
+        num-interpolated-steps = <2048>;
+        default-brightness-level = <4096>;
+
+        power-supply = <&vdd_bl_reg>;
+        enable-gpios = <&gpio 58 0>;
+    };
+
+...
diff --git a/Documentation/devicetree/bindings/leds/backlight/qcom-wled.yaml b/Documentation/devicetree/bindings/leds/backlight/qcom-wled.yaml
new file mode 100644
index 000000000..4c15693f7
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/backlight/qcom-wled.yaml
@@ -0,0 +1,262 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/leds/backlight/qcom-wled.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Binding for Qualcomm Technologies, Inc. WLED driver
+
+maintainers:
+  - Bjorn Andersson <bjorn.andersson@linaro.org>
+  - Kiran Gunda <kgunda@codeaurora.org>
+
+description: |
+  WLED (White Light Emitting Diode) driver is used for controlling display
+  backlight that is part of PMIC on Qualcomm Technologies, Inc. reference
+  platforms. The PMIC is connected to the host processor via SPMI bus.
+
+properties:
+  compatible:
+    enum:
+      - qcom,pm8941-wled
+      - qcom,pmi8994-wled
+      - qcom,pmi8998-wled
+      - qcom,pm660l-wled
+      - qcom,pm6150l-wled
+      - qcom,pm8150l-wled
+
+  reg:
+    minItems: 1
+    maxItems: 2
+
+  default-brightness:
+    description: |
+      brightness value on boot.
+
+  label: true
+
+  max-brightness:
+    description: |
+      Maximum brightness level.
+
+  qcom,cs-out:
+    description: |
+      enable current sink output.
+      This property is supported only for WLED3.
+    type: boolean
+
+  qcom,cabc:
+    description: |
+      enable content adaptive backlight control.
+    type: boolean
+
+  qcom,ext-gen:
+    description: |
+      use externally generated modulator signal to dim.
+      This property is supported only for WLED3.
+    type: boolean
+
+  qcom,current-limit:
+    description: |
+      mA; per-string current limit.
+      This property is supported only for WLED3.
+    $ref: /schemas/types.yaml#/definitions/uint32
+    default: 20
+    minimum: 0
+    maximum: 25
+
+  qcom,current-limit-microamp:
+    description: |
+      uA; per-string current limit.
+    default: 25
+    minimum: 0
+    maximum: 30000
+    multipleOf: 25
+
+  qcom,current-boost-limit:
+    description: |
+      mA; boost current limit.
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+  qcom,switching-freq:
+    description: |
+      kHz; switching frequency.
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [ 600, 640, 685, 738, 800, 872, 960, 1066, 1200, 1371, 1600, 1920,
+            2400, 3200, 4800, 9600 ]
+
+  qcom,ovp:
+    description: |
+      V; Over-voltage protection limit.
+      This property is supported only for WLED3.
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [ 27, 29, 32, 35 ]
+    default: 29
+
+  qcom,ovp-millivolt:
+    description: |
+      Over-voltage protection limit. This property is for WLED4 only.
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [ 18100, 19600, 29600, 31100 ]
+    default: 29600
+
+  qcom,num-strings:
+    description: |
+      number of led strings attached.
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+  qcom,enabled-strings:
+    description: |
+      Array of the WLED strings numbered from 0 to 3. Each
+      string of leds are operated individually. Specify the
+      list of strings used by the device. Any combination of
+      led strings can be used.
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    minItems: 1
+    maxItems: 4
+
+  qcom,external-pfet:
+    description: |
+      Specify if external PFET control for short circuit
+      protection is used. This property is supported only
+      for WLED4.
+    type: boolean
+
+  qcom,auto-string-detection:
+    description: |
+      Enables auto-detection of the WLED string configuration.
+      This feature is not supported for WLED3.
+    type: boolean
+
+  interrupts:
+    minItems: 1
+    items:
+      - description: over voltage protection interrupt.
+      - description: short circuit interrupt.
+
+  interrupt-names:
+    minItems: 1
+    items:
+      - const: ovp
+      - const: short
+
+  qcom,modulator-sel:
+    description: |
+      Selects the modulator used for brightness modulation.
+      Allowed values are,
+           0 - Modulator A
+           1 - Modulator B
+      This property is applicable only to WLED5 peripheral.
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [ 0, 1 ]
+    default: 0
+
+  qcom,cabc-sel:
+    description: |
+      Selects the CABC pin signal used for brightness modulation.
+      Allowed values are,
+           0 - CABC disabled
+           1 - CABC 1
+           2 - CABC 2
+           3 - External signal (e.g. LPG) is used for dimming
+      This property is applicable only to WLED5 peripheral.
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [ 0, 1, 2, 3 ]
+
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: qcom,pm8941-wled
+
+    then:
+      properties:
+        reg:
+          maxItems: 1
+
+        qcom,current-boost-limit:
+          enum: [ 105, 385, 525, 805, 980, 1260, 1400, 1680 ]
+          default: 805
+
+        qcom,switching-freq:
+          default: 1600
+
+        qcom,num-strings:
+          enum: [ 1, 2, 3 ]
+
+        interrupts:
+          maxItems: 1
+
+        interrupt-names:
+          maxItems: 1
+
+    else:
+      properties:
+        reg:
+          minItems: 2
+
+        qcom,current-boost-limit:
+          enum: [ 105, 280, 450, 620, 970, 1150, 1300, 1500 ]
+          default: 970
+
+        qcom,switching-freq:
+          default: 800
+
+        qcom,num-strings:
+          enum: [ 1, 2, 3, 4 ]
+
+        interrupts:
+          minItems: 2
+
+        interrupt-names:
+          minItems: 2
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - qcom,pm8150l-wled
+
+    then:
+      properties:
+        default-brightness:
+          minimum: 0
+          maximum: 32767
+
+        max-brightness:
+          minimum: 0
+          maximum: 32767
+
+    else:
+      properties:
+        default-brightness:
+          minimum: 0
+          maximum: 4095
+
+        max-brightness:
+          minimum: 0
+          maximum: 4095
+
+required:
+  - compatible
+  - reg
+  - label
+
+additionalProperties: false
+
+examples:
+  - |
+    backlight@d800 {
+        compatible = "qcom,pm8941-wled";
+        reg = <0xd800 0x100>;
+        label = "backlight";
+
+        qcom,cs-out;
+        qcom,current-limit = <20>;
+        qcom,current-boost-limit = <805>;
+        qcom,switching-freq = <1600>;
+        qcom,ovp = <29>;
+        qcom,num-strings = <2>;
+        qcom,enabled-strings = <0 1>;
+     };
diff --git a/Documentation/devicetree/bindings/leds/backlight/richtek,rt4831-backlight.yaml b/Documentation/devicetree/bindings/leds/backlight/richtek,rt4831-backlight.yaml
new file mode 100644
index 000000000..99e9e138f
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/backlight/richtek,rt4831-backlight.yaml
@@ -0,0 +1,67 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/leds/backlight/richtek,rt4831-backlight.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Richtek RT4831 Backlight
+
+maintainers:
+  - ChiYuan Huang <cy_huang@richtek.com>
+
+description: |
+  RT4831 is a mutifunctional device that can provide power to the LCD display
+  and LCD backlight.
+
+  For the LCD backlight, it can provide four channel WLED driving capability.
+  Each channel driving current is up to 30mA
+
+  Datasheet is available at
+  https://www.richtek.com/assets/product_file/RT4831A/DS4831A-05.pdf
+
+allOf:
+  - $ref: common.yaml#
+
+properties:
+  compatible:
+    const: richtek,rt4831-backlight
+
+  default-brightness:
+    minimum: 0
+    maximum: 2048
+
+  max-brightness:
+    minimum: 0
+    maximum: 2048
+
+  richtek,pwm-enable:
+    description: |
+      Specify the backlight dimming following by PWM duty or by SW control.
+    type: boolean
+
+  richtek,bled-ovp-sel:
+    description: |
+      Backlight OVP level selection, currently support 17V/21V/25V/29V.
+    $ref: /schemas/types.yaml#/definitions/uint8
+    default: 1
+    minimum: 0
+    maximum: 3
+
+  richtek,bled-ocp-microamp:
+    description: |
+      Backlight over current protection level.
+    enum: [900000, 1200000, 1500000, 1800000]
+
+  richtek,channel-use:
+    description: |
+      Backlight LED channel to be used.
+      BIT 0/1/2/3 is used to indicate led channel 1/2/3/4 enable or disable.
+    $ref: /schemas/types.yaml#/definitions/uint8
+    minimum: 1
+    maximum: 15
+
+required:
+  - compatible
+  - richtek,channel-use
+
+additionalProperties: false
diff --git a/Documentation/devicetree/bindings/leds/backlight/sky81452-backlight.txt b/Documentation/devicetree/bindings/leds/backlight/sky81452-backlight.txt
new file mode 100644
index 000000000..8bf2940f5
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/backlight/sky81452-backlight.txt
@@ -0,0 +1,29 @@
+SKY81452-backlight bindings
+
+Required properties:
+- compatible		: Must be "skyworks,sky81452-backlight"
+
+Optional properties:
+- name			: Name of backlight device. Default is 'lcd-backlight'.
+- gpios			: GPIO to use to EN pin.
+			See Documentation/devicetree/bindings/gpio/gpio.txt
+- led-sources		: List of enabled channels from 0 to 5.
+			See Documentation/devicetree/bindings/leds/common.txt
+- skyworks,ignore-pwm	: Ignore both PWM input
+- skyworks,dpwm-mode	: Enable DPWM dimming mode, otherwise Analog dimming.
+- skyworks,phase-shift	: Enable phase shift mode
+- skyworks,short-detection-threshold-volt
+			: It should be one of 4, 5, 6 and 7V.
+- skyworks,current-limit-mA
+			: It should be 2300mA or 2750mA.
+
+Example:
+
+	backlight {
+		compatible = "skyworks,sky81452-backlight";
+		name = "pwm-backlight";
+		led-sources = <0 1 2 5>;
+		skyworks,ignore-pwm;
+		skyworks,phase-shift;
+		skyworks,current-limit-mA = <2300>;
+	};
diff --git a/Documentation/devicetree/bindings/leds/backlight/tps65217-backlight.txt b/Documentation/devicetree/bindings/leds/backlight/tps65217-backlight.txt
new file mode 100644
index 000000000..5fb9279ac
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/backlight/tps65217-backlight.txt
@@ -0,0 +1,27 @@
+TPS65217 family of regulators
+
+The TPS65217 chip contains a boost converter and current sinks which can be
+used to drive LEDs for use as backlights.
+
+Required properties:
+- compatible: "ti,tps65217"
+- reg: I2C slave address
+- backlight: node for specifying WLED1 and WLED2 lines in TPS65217
+- isel: selection bit, valid values: 1 for ISEL1 (low-level) and 2 for ISEL2 (high-level)
+- fdim: PWM dimming frequency, valid values: 100, 200, 500, 1000
+- default-brightness: valid values: 0-100
+
+Each regulator is defined using the standard binding for regulators.
+
+Example:
+
+	tps: tps@24 {
+		reg = <0x24>;
+		compatible = "ti,tps65217";
+		backlight {
+			isel = <1>;  /* 1 - ISET1, 2 ISET2 */
+			fdim = <100>; /* TPS65217_BL_FDIM_100HZ */
+			default-brightness = <50>;
+		};
+	};
+
diff --git a/Documentation/devicetree/bindings/leds/backlight/zii,rave-sp-backlight.txt b/Documentation/devicetree/bindings/leds/backlight/zii,rave-sp-backlight.txt
new file mode 100644
index 000000000..ff5c92138
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/backlight/zii,rave-sp-backlight.txt
@@ -0,0 +1,23 @@
+Zodiac Inflight Innovations RAVE Supervisory Processor Backlight Bindings
+
+RAVE SP backlight device is a "MFD cell" device corresponding to
+backlight functionality of RAVE Supervisory Processor. It is expected
+that its Device Tree node is specified as a child of the node
+corresponding to the parent RAVE SP device (as documented in
+Documentation/devicetree/bindings/mfd/zii,rave-sp.txt)
+
+Required properties:
+
+- compatible: Should be "zii,rave-sp-backlight"
+
+Example:
+
+	rave-sp {
+		compatible = "zii,rave-sp-rdu1";
+		current-speed = <38400>;
+
+		backlight {
+			compatible = "zii,rave-sp-backlight";
+		};
+	}
+