mirror of https://gitee.com/openkylin/linux.git
223 lines
4.3 KiB
Plaintext
223 lines
4.3 KiB
Plaintext
Binding for TI/National Semiconductor LP55xx Led Drivers
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Required properties:
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- compatible: "national,lp5521" or "national,lp5523" or "ti,lp5562" or "ti,lp8501"
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- reg: I2C slave address
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- clock-mode: Input clock mode, (0: automode, 1: internal, 2: external)
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Each child has own specific current settings
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- led-cur: Current setting at each led channel (mA x10, 0 if led is not connected)
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- max-cur: Maximun current at each led channel.
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Optional properties:
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- enable-gpio: GPIO attached to the chip's enable pin
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- label: Used for naming LEDs
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- pwr-sel: LP8501 specific property. Power selection for output channels.
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0: D1~9 are connected to VDD
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1: D1~6 with VDD, D7~9 with VOUT
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2: D1~6 with VOUT, D7~9 with VDD
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3: D1~9 are connected to VOUT
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Alternatively, each child can have a specific channel name and trigger:
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- chan-name (optional): name of channel
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- linux,default-trigger (optional): see
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Documentation/devicetree/bindings/leds/common.txt
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example 1) LP5521
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3 LED channels, external clock used. Channel names are 'lp5521_pri:channel0',
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'lp5521_pri:channel1' and 'lp5521_pri:channel2', with a heartbeat trigger
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on channel 0.
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lp5521@32 {
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compatible = "national,lp5521";
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reg = <0x32>;
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label = "lp5521_pri";
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clock-mode = /bits/ 8 <2>;
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chan0 {
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led-cur = /bits/ 8 <0x2f>;
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max-cur = /bits/ 8 <0x5f>;
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linux,default-trigger = "heartbeat";
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};
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chan1 {
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led-cur = /bits/ 8 <0x2f>;
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max-cur = /bits/ 8 <0x5f>;
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};
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chan2 {
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led-cur = /bits/ 8 <0x2f>;
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max-cur = /bits/ 8 <0x5f>;
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};
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};
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example 2) LP5523
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9 LED channels with specific name. Internal clock used.
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The I2C slave address is configurable with ASEL1 and ASEL0 pins.
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Available addresses are 32/33/34/35h.
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ASEL1 ASEL0 Address
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-------------------------
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GND GND 32h
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GND VEN 33h
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VEN GND 34h
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VEN VEN 35h
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lp5523@32 {
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compatible = "national,lp5523";
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reg = <0x32>;
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clock-mode = /bits/ 8 <1>;
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chan0 {
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chan-name = "d1";
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led-cur = /bits/ 8 <0x14>;
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max-cur = /bits/ 8 <0x20>;
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};
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chan1 {
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chan-name = "d2";
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led-cur = /bits/ 8 <0x14>;
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max-cur = /bits/ 8 <0x20>;
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};
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chan2 {
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chan-name = "d3";
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led-cur = /bits/ 8 <0x14>;
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max-cur = /bits/ 8 <0x20>;
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};
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chan3 {
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chan-name = "d4";
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led-cur = /bits/ 8 <0x14>;
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max-cur = /bits/ 8 <0x20>;
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};
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chan4 {
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chan-name = "d5";
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led-cur = /bits/ 8 <0x14>;
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max-cur = /bits/ 8 <0x20>;
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};
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chan5 {
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chan-name = "d6";
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led-cur = /bits/ 8 <0x14>;
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max-cur = /bits/ 8 <0x20>;
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};
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chan6 {
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chan-name = "d7";
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led-cur = /bits/ 8 <0x14>;
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max-cur = /bits/ 8 <0x20>;
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};
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chan7 {
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chan-name = "d8";
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led-cur = /bits/ 8 <0x14>;
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max-cur = /bits/ 8 <0x20>;
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};
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chan8 {
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chan-name = "d9";
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led-cur = /bits/ 8 <0x14>;
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max-cur = /bits/ 8 <0x20>;
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};
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};
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example 3) LP5562
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4 channels are defined.
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lp5562@30 {
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compatible = "ti,lp5562";
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reg = <0x30>;
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clock-mode = /bits/8 <2>;
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chan0 {
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chan-name = "R";
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led-cur = /bits/ 8 <0x20>;
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max-cur = /bits/ 8 <0x60>;
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};
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chan1 {
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chan-name = "G";
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led-cur = /bits/ 8 <0x20>;
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max-cur = /bits/ 8 <0x60>;
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};
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chan2 {
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chan-name = "B";
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led-cur = /bits/ 8 <0x20>;
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max-cur = /bits/ 8 <0x60>;
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};
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chan3 {
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chan-name = "W";
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led-cur = /bits/ 8 <0x20>;
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max-cur = /bits/ 8 <0x60>;
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};
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};
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example 4) LP8501
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9 channels are defined. The 'pwr-sel' is LP8501 specific property.
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Others are same as LP5523.
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lp8501@32 {
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compatible = "ti,lp8501";
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reg = <0x32>;
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clock-mode = /bits/ 8 <2>;
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pwr-sel = /bits/ 8 <3>; /* D1~9 connected to VOUT */
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chan0 {
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chan-name = "d1";
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led-cur = /bits/ 8 <0x14>;
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max-cur = /bits/ 8 <0x20>;
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};
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chan1 {
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chan-name = "d2";
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led-cur = /bits/ 8 <0x14>;
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max-cur = /bits/ 8 <0x20>;
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};
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chan2 {
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chan-name = "d3";
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led-cur = /bits/ 8 <0x14>;
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max-cur = /bits/ 8 <0x20>;
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};
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chan3 {
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chan-name = "d4";
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led-cur = /bits/ 8 <0x14>;
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max-cur = /bits/ 8 <0x20>;
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};
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chan4 {
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chan-name = "d5";
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led-cur = /bits/ 8 <0x14>;
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max-cur = /bits/ 8 <0x20>;
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};
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chan5 {
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chan-name = "d6";
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led-cur = /bits/ 8 <0x14>;
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max-cur = /bits/ 8 <0x20>;
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};
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chan6 {
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chan-name = "d7";
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led-cur = /bits/ 8 <0x14>;
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max-cur = /bits/ 8 <0x20>;
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};
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chan7 {
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chan-name = "d8";
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led-cur = /bits/ 8 <0x14>;
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max-cur = /bits/ 8 <0x20>;
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};
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chan8 {
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chan-name = "d9";
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led-cur = /bits/ 8 <0x14>;
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max-cur = /bits/ 8 <0x20>;
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};
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};
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