mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
synced 2025-09-05 11:53:41 +00:00
0a8d6c9c71
- Add lots of Device Tree bindings / support
- Turn off LED strings when display is blank
- Switch I2C drivers from .probe_new() to .probe()
- Remove superfluous NULL checks
- Only obtain PWM information once and do it in .probe()
- Fix-ups
- Ensure locks are obtained and held when required
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Merge tag 'backlight-next-6.5' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight
Pull backlight updates from Lee Jones:
"New Functionality:
- Add lots of Device Tree bindings / support
- Turn off LED strings when display is blank
- Switch I2C drivers from .probe_new() to .probe()
- Remove superfluous NULL checks
- Only obtain PWM information once and do it in .probe()
Fix-ups:
- Ensure locks are obtained and held when required"
* tag 'backlight-next-6.5' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight:
backlight: led_bl: Take led_access lock when required
video: backlight: lp855x: Get PWM for PWM mode during probe
dt-bindings: backlight: lp855x: Convert to YAML and modernize
dt-bindings: backlight: pwm: Make power-supply not required
backlight: pwm_bl: Remove unneeded checks for valid GPIOs
backlight: Switch i2c drivers back to use .probe()
backlight: lm3630a: Turn off both led strings when display is blank
dt-bindings: leds: backlight: ktz8866: Add reg property and update example
87 lines
2.2 KiB
YAML
87 lines
2.2 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/leds/backlight/kinetic,ktz8866.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Kinetic Technologies KTZ8866 backlight
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maintainers:
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- Jianhua Lu <lujianhua000@gmail.com>
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description: |
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The Kinetic Technologies KTZ8866 is a high efficiency 6-channels-current-sinks
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led backlight with dual lcd bias power.
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https://www.kinet-ic.com/ktz8866/
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allOf:
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- $ref: common.yaml#
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properties:
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compatible:
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const: kinetic,ktz8866
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reg:
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maxItems: 1
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vddpos-supply:
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description: positive boost supply regulator.
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vddneg-supply:
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description: negative boost supply regulator.
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enable-gpios:
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description: GPIO to use to enable/disable the backlight (HWEN pin).
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maxItems: 1
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current-num-sinks:
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description: number of the LED current sinks' channels.
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$ref: /schemas/types.yaml#/definitions/uint32
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enum: [1, 2, 3, 4, 5, 6]
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kinetic,current-ramp-delay-ms:
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description: |
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LED current ramping delay time in milliseconds, note that the
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case 1 will be mapped to 1μs.
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enum: [1, 2, 4, 8, 16, 32, 64, 128, 192, 256, 320, 384, 448, 512, 576, 640]
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kinetic,led-enable-ramp-delay-ms:
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description: |
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LED on/off ramping delay time in milliseconds, note that the case 0 will be
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mapped to 512μs because ktz8866 can't ramp faster than it.
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enum: [0, 1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384]
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kinetic,enable-lcd-bias:
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description: Set if we want to output bias power supply for LCD.
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type: boolean
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required:
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- compatible
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- reg
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- vddpos-supply
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- vddneg-supply
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- enable-gpios
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unevaluatedProperties: false
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examples:
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- |
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#include <dt-bindings/gpio/gpio.h>
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i2c {
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#address-cells = <1>;
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#size-cells = <0>;
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backlight@11 {
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compatible = "kinetic,ktz8866";
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reg = <0x11>;
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vddpos-supply = <&bl_vddpos_5p5>;
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vddneg-supply = <&bl_vddneg_5p5>;
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enable-gpios = <&tlmm 139 GPIO_ACTIVE_HIGH>;
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current-num-sinks = <5>;
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kinetic,current-ramp-delay-ms = <128>;
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kinetic,led-enable-ramp-delay-ms = <1>;
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kinetic,enable-lcd-bias;
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};
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};
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