Documentation/devicetree/bindings/leds/leds-lp55xx.txt

   1 Binding for TI/National Semiconductor LP55xx Led Drivers
   2
   3 Required properties:
   4 - compatible: "national,lp5521" or "national,lp5523" or "ti,lp5562"
   5 - reg: I2C slave address
   6 - clock-mode: Input clock mode, (0: automode, 1: internal, 2: external)
   7
   8 Each child has own specific current settings
   9 - led-cur: Current setting at each led channel (mA x10, 0 if led is not connected)
  10 - max-cur: Maximun current at each led channel.
  11
  12 Optional properties:
  13 - label: Used for naming LEDs
  14
  15 Alternatively, each child can have specific channel name
  16 - chan-name: Name of each channel name
  17
  18 example 1) LP5521
  19 3 LED channels, external clock used. Channel names are 'lp5521_pri:channel0',
  20 'lp5521_pri:channel1' and 'lp5521_pri:channel2'
  21
  22 lp5521@32 {
  23         compatible = "national,lp5521";
  24         reg = <0x32>;
  25         label = "lp5521_pri";
  26         clock-mode = /bits/ 8 <2>;
  27
  28         chan0 {
  29                 led-cur = /bits/ 8 <0x2f>;
  30                 max-cur = /bits/ 8 <0x5f>;
  31         };
  32
  33         chan1 {
  34                 led-cur = /bits/ 8 <0x2f>;
  35                 max-cur = /bits/ 8 <0x5f>;
  36         };
  37
  38         chan2 {
  39                 led-cur = /bits/ 8 <0x2f>;
  40                 max-cur = /bits/ 8 <0x5f>;
  41         };
  42 };
  43
  44 example 2) LP5523
  45 9 LED channels with specific name. Internal clock used.
  46 The I2C slave address is configurable with ASEL1 and ASEL0 pins.
  47 Available addresses are 32/33/34/35h.
  48
  49 ASEL1    ASEL0    Address
  50 -------------------------
  51  GND      GND       32h
  52  GND      VEN       33h
  53  VEN      GND       34h
  54  VEN      VEN       35h
  55
  56 lp5523@32 {
  57         compatible = "national,lp5523";
  58         reg = <0x32>;
  59         clock-mode = /bits/ 8 <1>;
  60
  61         chan0 {
  62                 chan-name = "d1";
  63                 led-cur = /bits/ 8 <0x14>;
  64                 max-cur = /bits/ 8 <0x20>;
  65         };
  66
  67         chan1 {
  68                 chan-name = "d2";
  69                 led-cur = /bits/ 8 <0x14>;
  70                 max-cur = /bits/ 8 <0x20>;
  71         };
  72
  73         chan2 {
  74                 chan-name = "d3";
  75                 led-cur = /bits/ 8 <0x14>;
  76                 max-cur = /bits/ 8 <0x20>;
  77         };
  78
  79         chan3 {
  80                 chan-name = "d4";
  81                 led-cur = /bits/ 8 <0x14>;
  82                 max-cur = /bits/ 8 <0x20>;
  83         };
  84
  85         chan4 {
  86                 chan-name = "d5";
  87                 led-cur = /bits/ 8 <0x14>;
  88                 max-cur = /bits/ 8 <0x20>;
  89         };
  90
  91         chan5 {
  92                 chan-name = "d6";
  93                 led-cur = /bits/ 8 <0x14>;
  94                 max-cur = /bits/ 8 <0x20>;
  95         };
  96
  97         chan6 {
  98                 chan-name = "d7";
  99                 led-cur = /bits/ 8 <0x14>;
 100                 max-cur = /bits/ 8 <0x20>;
 101         };
 102
 103         chan7 {
 104                 chan-name = "d8";
 105                 led-cur = /bits/ 8 <0x14>;
 106                 max-cur = /bits/ 8 <0x20>;
 107         };
 108
 109         chan8 {
 110                 chan-name = "d9";
 111                 led-cur = /bits/ 8 <0x14>;
 112                 max-cur = /bits/ 8 <0x20>;
 113         };
 114 };
 115
 116 example 3) LP5562
 117 4 channels are defined.
 118
 119 lp5562@30 {
 120         compatible = "ti,lp5562";
 121         reg = <0x30>;
 122         clock-mode = /bits/8 <2>;
 123
 124         chan0 {
 125                 chan-name = "R";
 126                 led-cur = /bits/ 8 <0x20>;
 127                 max-cur = /bits/ 8 <0x60>;
 128         };
 129
 130         chan1 {
 131                 chan-name = "G";
 132                 led-cur = /bits/ 8 <0x20>;
 133                 max-cur = /bits/ 8 <0x60>;
 134         };
 135
 136         chan2 {
 137                 chan-name = "B";
 138                 led-cur = /bits/ 8 <0x20>;
 139                 max-cur = /bits/ 8 <0x60>;
 140         };
 141
 142         chan3 {
 143                 chan-name = "W";
 144                 led-cur = /bits/ 8 <0x20>;
 145                 max-cur = /bits/ 8 <0x60>;
 146         };
 147 };