Merge tag 'backlight-next-6.11' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight

Pull backlight updates from Lee Jones:
 "New Drivers:
   - Texas Instruments LM3509 Backlight Driver

  Fix-ups:
   - Device Tree binding adaptions/conversions/creation
   - Drop i2c_device_id::driver_data where the value is unused
   - Make use of the new *_scoped() guard APIs
   - Decouple from fbdev by providing Backlight with its own
     BACKLIGHT_POWER_* constrains

  Bug Fixes:
   - Correctly assess return values (NULL vs IS_ERR())
   - Supply a bunch of MODULE_DESCRIPTIONs to silence modpost warnings"

* tag 'backlight-next-6.11' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight: (23 commits)
  backlight: sky81452-backlight: Use backlight power constants
  backlight: rave-sp-backlight: Use backlight power constants
  backlight: pwm-backlight: Use backlight power constants
  backlight: pcf50633-backlight: Use backlight power constants
  backlight: pandora-backlight: Use backlight power constants
  backlight: mp3309c: Use backlight power constants
  backlight: lm3533-backlight: Use backlight power constants
  backlight: led-backlight: Use backlight power constants
  backlight: ktd253-backlight: Use backlight power constants
  backlight: kb3886-bl: Use backlight power constants
  backlight: journada_bl: Use backlight power constants
  backlight: ipaq-micro-backlight: Use backlight power constants
  backlight: gpio-backlight: Use backlight power constants
  backlight: corgi-lcd: Use backlight power constants
  backlight: ams369fb06: Use backlight power constants
  backlight: aat2870-backlight: Use blacklight power constants
  backlight: Add BACKLIGHT_POWER_ constants for power states
  backlight: lm3509_bl: Fix early returns in for_each_child_of_node()
  backlight: Drop explicit initialization of struct i2c_device_id::driver_data to 0
  backlight: Add missing MODULE_DESCRIPTION() macros
  ...

2 files changed, 140 insertions, 3 deletions

diff --git a/Documentation/ABI/stable/sysfs-class-backlight b/Documentation/ABI/stable/sysfs-class-backlight
index 023fb52645f8..6102d6bebdf9 100644
--- a/Documentation/ABI/stable/sysfs-class-backlight
+++ b/Documentation/ABI/stable/sysfs-class-backlight
@@ -3,10 +3,11 @@ Date:		April 2005
 KernelVersion:	2.6.12
 Contact:	Richard Purdie <rpurdie@rpsys.net>
 Description:
-		Control BACKLIGHT power, values are FB_BLANK_* from fb.h
+		Control BACKLIGHT power, values are compatible with
+		FB_BLANK_* from fb.h
 
-		 - FB_BLANK_UNBLANK (0)   : power on.
-		 - FB_BLANK_POWERDOWN (4) : power off
+		 - 0 (FB_BLANK_UNBLANK)   : power on.
+		 - 4 (FB_BLANK_POWERDOWN) : power off
 Users:		HAL
 
 What:		/sys/class/backlight/<backlight>/brightness
diff --git a/Documentation/devicetree/bindings/leds/backlight/ti,lm3509.yaml b/Documentation/devicetree/bindings/leds/backlight/ti,lm3509.yaml
new file mode 100644
index 000000000000..482fae71dd53
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/backlight/ti,lm3509.yaml
@@ -0,0 +1,136 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/leds/backlight/ti,lm3509.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: TI LM3509 High Efficiency Boost for White LED's and/or OLED Displays
+
+maintainers:
+  - Patrick Gansterer <paroga@paroga.com>
+
+description:
+  The LM3509 current mode boost converter offers two separate outputs.
+  https://www.ti.com/product/LM3509
+
+properties:
+  compatible:
+    const: ti,lm3509
+
+  reg:
+    maxItems: 1
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 0
+
+  reset-gpios:
+    maxItems: 1
+
+  ti,brightness-rate-of-change-us:
+    description: Brightness Rate of Change in microseconds.
+    enum: [51, 13000, 26000, 52000]
+
+  ti,oled-mode:
+    description: Enable OLED mode.
+    type: boolean
+
+patternProperties:
+  "^led@[01]$":
+    type: object
+    description: Properties for a string of connected LEDs.
+    $ref: common.yaml#
+
+    properties:
+      reg:
+        description:
+          The control register that is used to program the two current sinks.
+          The LM3509 has two registers (BMAIN and BSUB) and are represented
+          as 0 or 1 in this property. The two current sinks can be controlled
+          independently with both registers, or register BMAIN can be
+          configured to control both sinks with the led-sources property.
+        minimum: 0
+        maximum: 1
+
+      label: true
+
+      led-sources:
+        minItems: 1
+        maxItems: 2
+        items:
+          minimum: 0
+          maximum: 1
+
+      default-brightness:
+        minimum: 0
+        maximum: 31
+        default: 18
+
+      max-brightness:
+        minimum: 0
+        maximum: 31
+        default: 31
+
+    required:
+      - reg
+
+    additionalProperties: false
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        backlight@36 {
+            compatible = "ti,lm3509";
+            reg = <0x36>;
+            reset-gpios = <&gpio2 5 GPIO_ACTIVE_LOW>;
+
+            ti,oled-mode;
+            ti,brightness-rate-of-change-us = <52000>;
+
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            led@0 {
+                reg = <0>;
+                led-sources = <0 1>;
+                label = "lcd-backlight";
+                default-brightness = <12>;
+                max-brightness = <31>;
+            };
+        };
+    };
+  - |
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        backlight@36 {
+            compatible = "ti,lm3509";
+            reg = <0x36>;
+
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            led@0 {
+                reg = <0>;
+                default-brightness = <12>;
+            };
+
+            led@1 {
+                reg = <1>;
+                default-brightness = <15>;
+            };
+        };
+    };