68 lines
2.6 KiB
Plaintext
68 lines
2.6 KiB
Plaintext
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LTR-553ALS-01 optical sensor
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LTR553 is an ambient light and proximity sensor. It connects to host SoC via
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I2C bus.
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Abbreviation:
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ALS: ambient light sensor
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PS: proximity sensor
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ALPS: ambient light and proximity sensor
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Required properties:
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- compatible : Should be "liteon,ltr553".
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- reg : i2c slave address of this device.
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- vdd-supply : Analog power supply needed to power up this device.
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- vio-supply : Digital IO power supply needed for IO and i2c.
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- interrupt-parent : The interrupt controller this device is connected to.
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- interrupts : L/P sample interrupt to indicate new data ready.
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- pinctrl-names : pinctrl configuration names of this device. Should be
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"default" and "sleep".
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- pinctrl-0 : Should specify pin control groups used for this sensor.
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- pinctrl-1 : Should specify pin control groups used for this sensor.
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- liteon,irq-gpio : GPIO pin for interrupt of this device.
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- liteon,als-ps-persist: The number of data out of range to trigger interrupt.
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- liteon,ps-led : Proximity sensor LED settings.
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- liteon,ps-pulses : Controls the number of LED pulses to be emitted.
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- liteon,als-integration-time : ALS integration time configuration. The
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maximum value is 7.
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Optional properties:
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- liteon,ps-distance-table : Proximity sensor ADC value to transfer into
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distance in centimeter.
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- liteon,als-equation-0 : Equation to convert ALS data into lux for
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light ratio below 0.45.
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- liteon,als-equation-1 : Equation to convert ALS data into lux for
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light ratio between 0.45 and 0.68.
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- liteon,als-equation-2 : Equation to convert ALS data into lux for
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light ratio between 0.68 and 0.99.
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- liteon,als-equation-3 : Equation to convert ALS data into lux for
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light ratio above 0.99.
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- liteon,wakeup-threshold : Threshold in centimeter to wake up SoC in
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suspend mode when proximity is enabled.
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- liteon,als-sensitivity : Ambient light sensitivity in lux. This array
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configures how much light intensity change will trigger a light sensor
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event under different als gain configuration. The array size must be 8.
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Example:
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i2c@78b5000 { /* BLSP1 QUP1 */
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liteon@23 {
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compatible = "liteon,ltr553";
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reg = <0x23>;
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vdd-supply = <&pm8916_l17>;
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vio-supply = <&pm8916_l6>;
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interrupt-parent = <&msm_gpio>;
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interrupts = <113 0x2002>;
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pinctrl-names = "default","sleep";
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pinctrl-0 = <<r553_default>;
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pinctrl-1 = <<r553_sleep>;
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liteon,irq-gpio = <&msm_gpio 113 0x2002>;
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liteon,als-ps-persist = <0>;
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liteon,ps-led = <0x7f>;
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liteon,ps-pulses = <4>;
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liteon,wakeup-threshold = <4>;
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liteon,als-integration-time = <0>;
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liteon,als-sensitivity = <6000 3200 1600 800 0 0 130 1>;
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};
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}
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