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" or "ti,lp8501"
   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 - pwr-sel: LP8501 specific property. Power selection for output channels.
  15          0: D1~9 are connected to VDD
  16          1: D1~6 with VDD, D7~9 with VOUT
  17          2: D1~6 with VOUT, D7~9 with VDD
  18          3: D1~9 are connected to VOUT
  19
  20 Alternatively, each child can have specific channel name
  21 - chan-name: Name of each channel name
  22
  23 example 1) LP5521
  24 3 LED channels, external clock used. Channel names are 'lp5521_pri:channel0',
  25 'lp5521_pri:channel1' and 'lp5521_pri:channel2'
  26
  27 lp5521@32 {
  28         compatible = "national,lp5521";
  29         reg = <0x32>;
  30         label = "lp5521_pri";
  31         clock-mode = /bits/ 8 <2>;
  32
  33         chan0 {
  34                 led-cur = /bits/ 8 <0x2f>;
  35                 max-cur = /bits/ 8 <0x5f>;
  36         };
  37
  38         chan1 {
  39                 led-cur = /bits/ 8 <0x2f>;
  40                 max-cur = /bits/ 8 <0x5f>;
  41         };
  42
  43         chan2 {
  44                 led-cur = /bits/ 8 <0x2f>;
  45                 max-cur = /bits/ 8 <0x5f>;
  46         };
  47 };
  48
  49 example 2) LP5523
  50 9 LED channels with specific name. Internal clock used.
  51 The I2C slave address is configurable with ASEL1 and ASEL0 pins.
  52 Available addresses are 32/33/34/35h.
  53
  54 ASEL1    ASEL0    Address
  55 -------------------------
  56  GND      GND       32h
  57  GND      VEN       33h
  58  VEN      GND       34h
  59  VEN      VEN       35h
  60
  61 lp5523@32 {
  62         compatible = "national,lp5523";
  63         reg = <0x32>;
  64         clock-mode = /bits/ 8 <1>;
  65
  66         chan0 {
  67                 chan-name = "d1";
  68                 led-cur = /bits/ 8 <0x14>;
  69                 max-cur = /bits/ 8 <0x20>;
  70         };
  71
  72         chan1 {
  73                 chan-name = "d2";
  74                 led-cur = /bits/ 8 <0x14>;
  75                 max-cur = /bits/ 8 <0x20>;
  76         };
  77
  78         chan2 {
  79                 chan-name = "d3";
  80                 led-cur = /bits/ 8 <0x14>;
  81                 max-cur = /bits/ 8 <0x20>;
  82         };
  83
  84         chan3 {
  85                 chan-name = "d4";
  86                 led-cur = /bits/ 8 <0x14>;
  87                 max-cur = /bits/ 8 <0x20>;
  88         };
  89
  90         chan4 {
  91                 chan-name = "d5";
  92                 led-cur = /bits/ 8 <0x14>;
  93                 max-cur = /bits/ 8 <0x20>;
  94         };
  95
  96         chan5 {
  97                 chan-name = "d6";
  98                 led-cur = /bits/ 8 <0x14>;
  99                 max-cur = /bits/ 8 <0x20>;
 100         };
 101
 102         chan6 {
 103                 chan-name = "d7";
 104                 led-cur = /bits/ 8 <0x14>;
 105                 max-cur = /bits/ 8 <0x20>;
 106         };
 107
 108         chan7 {
 109                 chan-name = "d8";
 110                 led-cur = /bits/ 8 <0x14>;
 111                 max-cur = /bits/ 8 <0x20>;
 112         };
 113
 114         chan8 {
 115                 chan-name = "d9";
 116                 led-cur = /bits/ 8 <0x14>;
 117                 max-cur = /bits/ 8 <0x20>;
 118         };
 119 };
 120
 121 example 3) LP5562
 122 4 channels are defined.
 123
 124 lp5562@30 {
 125         compatible = "ti,lp5562";
 126         reg = <0x30>;
 127         clock-mode = /bits/8 <2>;
 128
 129         chan0 {
 130                 chan-name = "R";
 131                 led-cur = /bits/ 8 <0x20>;
 132                 max-cur = /bits/ 8 <0x60>;
 133         };
 134
 135         chan1 {
 136                 chan-name = "G";
 137                 led-cur = /bits/ 8 <0x20>;
 138                 max-cur = /bits/ 8 <0x60>;
 139         };
 140
 141         chan2 {
 142                 chan-name = "B";
 143                 led-cur = /bits/ 8 <0x20>;
 144                 max-cur = /bits/ 8 <0x60>;
 145         };
 146
 147         chan3 {
 148                 chan-name = "W";
 149                 led-cur = /bits/ 8 <0x20>;
 150                 max-cur = /bits/ 8 <0x60>;
 151         };
 152 };
 153
 154 example 4) LP8501
 155 9 channels are defined. The 'pwr-sel' is LP8501 specific property.
 156 Others are same as LP5523.
 157
 158 lp8501@32 {
 159         compatible = "ti,lp8501";
 160         reg = <0x32>;
 161         clock-mode = /bits/ 8 <2>;
 162         pwr-sel = /bits/ 8 <3>; /* D1~9 connected to VOUT */
 163
 164         chan0 {
 165                 chan-name = "d1";
 166                 led-cur = /bits/ 8 <0x14>;
 167                 max-cur = /bits/ 8 <0x20>;
 168         };
 169
 170         chan1 {
 171                 chan-name = "d2";
 172                 led-cur = /bits/ 8 <0x14>;
 173                 max-cur = /bits/ 8 <0x20>;
 174         };
 175
 176         chan2 {
 177                 chan-name = "d3";
 178                 led-cur = /bits/ 8 <0x14>;
 179                 max-cur = /bits/ 8 <0x20>;
 180         };
 181
 182         chan3 {
 183                 chan-name = "d4";
 184                 led-cur = /bits/ 8 <0x14>;
 185                 max-cur = /bits/ 8 <0x20>;
 186         };
 187
 188         chan4 {
 189                 chan-name = "d5";
 190                 led-cur = /bits/ 8 <0x14>;
 191                 max-cur = /bits/ 8 <0x20>;
 192         };
 193
 194         chan5 {
 195                 chan-name = "d6";
 196                 led-cur = /bits/ 8 <0x14>;
 197                 max-cur = /bits/ 8 <0x20>;
 198         };
 199
 200         chan6 {
 201                 chan-name = "d7";
 202                 led-cur = /bits/ 8 <0x14>;
 203                 max-cur = /bits/ 8 <0x20>;
 204         };
 205
 206         chan7 {
 207                 chan-name = "d8";
 208                 led-cur = /bits/ 8 <0x14>;
 209                 max-cur = /bits/ 8 <0x20>;
 210         };
 211
 212         chan8 {
 213                 chan-name = "d9";
 214                 led-cur = /bits/ 8 <0x14>;
 215                 max-cur = /bits/ 8 <0x20>;
 216         };
 217 };