59 lines
1.9 KiB
Plaintext
59 lines
1.9 KiB
Plaintext
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lp88xx bindings
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Required properties:
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- compatible: Should be one of "ti,lp8580", "ti,lp8863", "ti,lp8880"
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- reg: 0x2c for I2C slave address or SPI chip select address.
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- region-map: Region map code for LED 0 ~ LED5. Region map code is 0 to 5.
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In case of PWM mode, then only single region should be mapped.
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Optional properties:
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- advanced-slope-enabled: Advanced slope effect.
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- enable-gpios: GPIO specifiers for HW enable pin.
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- irq-gpios: GPIO specifiers for fault interrupt pin.
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- pwms: PWM specifiers for backlight control.
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- slope-time-ms: Lighting effect. Slope time from 0 to 500.
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- names: Array of backlight driver name strings, in order, for each LED group.
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- max-input-brt: Maximum expected brightness value passed to the driver.
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This value is used to scale requested brightness values to the device's
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actual maximum brightness.
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- init-brt: Initial backlight brightness (applied to all LED groups). Must be
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scaled to max-input-brt, if provided, or otherwise max device brightness.
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Example 1)
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I2C for device configuration, map region 0 to all LEDs and PWM input for
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backlight control.
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i2c1: i2c@f0018000 {
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backlight: lp8580@2c {
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compatible = "ti,lp8580";
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reg = <0x2c>;
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region-map = <0 0 0 0 0 0>;
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advanced-slope-enabled;
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enable-gpios = <&pioC 16 GPIO_ACTIVE_HIGH>;
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pwms = <&pwm0 0 10000 0>;
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slope-time-ms = <300>;
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};
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};
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Example 2)
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SPI for device configuration, CS is 0, backlight control through SPI,
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interrupt handling, region 0 for LED 0, 1, 2, region 1 for LED 3, 4, 5.
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spi1: spi@f8008000 {
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cs-gpios = <&pioC 25 0>;
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status = "okay";
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backlight_spi: lp8880@0 {
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compatible = "ti,lp8880";
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spi-max-frequency = <8000000>;
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reg = <0>;
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region-map = <0 0 0 1 1 1>;
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slope-time-ms = <300>;
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advanced-slope-enabled;
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enable-gpios = <&pioC 16 GPIO_ACTIVE_HIGH>;
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irq-gpios = <&pioB 25 GPIO_ACTIVE_LOW>;
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};
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};
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