From 2dac912809490ea3a6e5c16b83b54a08f36fc3d9 Mon Sep 17 00:00:00 2001 From: "Kim, Milo" Date: Tue, 7 May 2013 00:14:48 -0700 Subject: leds: lp55xx: support dynamic channel settings in the device tree structure 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 Signed-off-by: Milo(Woogyom) Kim Reviewed-by: Linus Walleij Signed-off-by: Bryan Wu --- .../devicetree/bindings/leds/leds-lp55xx.txt | 109 +++++++++++++++++++-- 1 file changed, 101 insertions(+), 8 deletions(-) (limited to 'Documentation/devicetree/bindings/leds') diff --git a/Documentation/devicetree/bindings/leds/leds-lp55xx.txt b/Documentation/devicetree/bindings/leds/leds-lp55xx.txt index 348c88eaadfd..1ed6bb0ce777 100644 --- a/Documentation/devicetree/bindings/leds/leds-lp55xx.txt +++ b/Documentation/devicetree/bindings/leds/leds-lp55xx.txt @@ -2,20 +2,113 @@ Binding for National Semiconductor LP55xx Led Drivers Required properties: - compatible: "national,lp5521" or "national,lp5523" -- label: Used for naming LEDs -- num-channel: Number of LED channels +- reg: I2C slave address +- clock-mode: Input clock mode, (0: automode, 1: internal, 2: external) + +Each child has own specific current settings - led-cur: Current setting at each led channel (mA x10, 0 if led is not connected) - max-cur: Maximun current at each led channel. -- clock-mode: Input clock mode, (0: automode, 1: internal, 2: external) -example: +Optional properties: +- label: Used for naming LEDs + +Alternatively, each child can have specific channel name +- chan-name: Name of each channel name + +example 1) LP5521 +3 LED channels, external clock used. Channel names are 'lp5521_pri:channel0', +'lp5521_pri:channel1' and 'lp5521_pri:channel2' lp5521@32 { compatible = "national,lp5521"; reg = <0x32>; label = "lp5521_pri"; - num-channel = /bits/ 8 <3>; - led-cur = /bits/ 8 <0x2f 0x2f 0x2f>; - max-cur = /bits/ 8 <0x5f 0x5f 0x5f>; - clock-mode = /bits/8 <2>; + clock-mode = /bits/ 8 <2>; + + chan0 { + led-cur = /bits/ 8 <0x2f>; + max-cur = /bits/ 8 <0x5f>; + }; + + chan1 { + led-cur = /bits/ 8 <0x2f>; + max-cur = /bits/ 8 <0x5f>; + }; + + chan2 { + led-cur = /bits/ 8 <0x2f>; + max-cur = /bits/ 8 <0x5f>; + }; +}; + +example 2) LP5523 +9 LED channels with specific name. Internal clock used. +The I2C slave address is configurable with ASEL1 and ASEL0 pins. +Available addresses are 32/33/34/35h. + +ASEL1 ASEL0 Address +------------------------- + GND GND 32h + GND VEN 33h + VEN GND 34h + VEN VEN 35h + +lp5523@32 { + compatible = "national,lp5523"; + reg = <0x32>; + clock-mode = /bits/ 8 <1>; + + chan0 { + chan-name = "d1"; + led-cur = /bits/ 8 <0x14>; + max-cur = /bits/ 8 <0x20>; + }; + + chan1 { + chan-name = "d2"; + led-cur = /bits/ 8 <0x14>; + max-cur = /bits/ 8 <0x20>; + }; + + chan2 { + chan-name = "d3"; + led-cur = /bits/ 8 <0x14>; + max-cur = /bits/ 8 <0x20>; + }; + + chan3 { + chan-name = "d4"; + led-cur = /bits/ 8 <0x14>; + max-cur = /bits/ 8 <0x20>; + }; + + chan4 { + chan-name = "d5"; + led-cur = /bits/ 8 <0x14>; + max-cur = /bits/ 8 <0x20>; + }; + + chan5 { + chan-name = "d6"; + led-cur = /bits/ 8 <0x14>; + max-cur = /bits/ 8 <0x20>; + }; + + chan6 { + chan-name = "d7"; + led-cur = /bits/ 8 <0x14>; + max-cur = /bits/ 8 <0x20>; + }; + + chan7 { + chan-name = "d8"; + led-cur = /bits/ 8 <0x14>; + max-cur = /bits/ 8 <0x20>; + }; + + chan8 { + chan-name = "d9"; + led-cur = /bits/ 8 <0x14>; + max-cur = /bits/ 8 <0x20>; + }; }; -- cgit v1.2.3