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2dac912809
Currently, the LP55xx DT structure supports max 3 channels.
However, LP5523 has max 9 channels and LP5562 has 4 channels.
To enhance this constraint, the DT structure has been changed.
(a) Use the child node for various channel settings instead of fixed array
(b) Remove 'num_channel' property.
This value can be retrieved by counting the children node.
(c) 'chan-name' property supported
(d) Documentation updates for LP5521 and LP5523
(cooloney@gmail.com: fix a coding style issue in leds-lp55xx.txt)
Cc: Gabriel Fernandez <gabriel.fernandez@stericsson.com>
Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
115 lines
2.2 KiB
Plaintext
115 lines
2.2 KiB
Plaintext
Binding for National Semiconductor LP55xx Led Drivers
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Required properties:
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- compatible: "national,lp5521" or "national,lp5523"
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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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- label: Used for naming LEDs
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Alternatively, each child can have specific channel name
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- chan-name: Name of each channel name
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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'
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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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};
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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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