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 a specific channel name and trigger:
  21 - chan-name (optional): name of channel
  22 - linux,default-trigger (optional): see
  23   Documentation/devicetree/bindings/leds/common.txt
  24
  25 example 1) LP5521
  26 3 LED channels, external clock used. Channel names are 'lp5521_pri:channel0',
  27 'lp5521_pri:channel1' and 'lp5521_pri:channel2', with a heartbeat trigger
  28 on channel 0.
  29
  30 lp5521@32 {
  31         compatible = "national,lp5521";
  32         reg = <0x32>;
  33         label = "lp5521_pri";
  34         clock-mode = /bits/ 8 <2>;
  35
  36         chan0 {
  37                 led-cur = /bits/ 8 <0x2f>;
  38                 max-cur = /bits/ 8 <0x5f>;
  39                 linux,default-trigger = "heartbeat";
  40         };
  41
  42         chan1 {
  43                 led-cur = /bits/ 8 <0x2f>;
  44                 max-cur = /bits/ 8 <0x5f>;
  45         };
  46
  47         chan2 {
  48                 led-cur = /bits/ 8 <0x2f>;
  49                 max-cur = /bits/ 8 <0x5f>;
  50         };
  51 };
  52
  53 example 2) LP5523
  54 9 LED channels with specific name. Internal clock used.
  55 The I2C slave address is configurable with ASEL1 and ASEL0 pins.
  56 Available addresses are 32/33/34/35h.
  57
  58 ASEL1    ASEL0    Address
  59 -------------------------
  60  GND      GND       32h
  61  GND      VEN       33h
  62  VEN      GND       34h
  63  VEN      VEN       35h
  64
  65 lp5523@32 {
  66         compatible = "national,lp5523";
  67         reg = <0x32>;
  68         clock-mode = /bits/ 8 <1>;
  69
  70         chan0 {
  71                 chan-name = "d1";
  72                 led-cur = /bits/ 8 <0x14>;
  73                 max-cur = /bits/ 8 <0x20>;
  74         };
  75
  76         chan1 {
  77                 chan-name = "d2";
  78                 led-cur = /bits/ 8 <0x14>;
  79                 max-cur = /bits/ 8 <0x20>;
  80         };
  81
  82         chan2 {
  83                 chan-name = "d3";
  84                 led-cur = /bits/ 8 <0x14>;
  85                 max-cur = /bits/ 8 <0x20>;
  86         };
  87
  88         chan3 {
  89                 chan-name = "d4";
  90                 led-cur = /bits/ 8 <0x14>;
  91                 max-cur = /bits/ 8 <0x20>;
  92         };
  93
  94         chan4 {
  95                 chan-name = "d5";
  96                 led-cur = /bits/ 8 <0x14>;
  97                 max-cur = /bits/ 8 <0x20>;
  98         };
  99
 100         chan5 {
 101                 chan-name = "d6";
 102                 led-cur = /bits/ 8 <0x14>;
 103                 max-cur = /bits/ 8 <0x20>;
 104         };
 105
 106         chan6 {
 107                 chan-name = "d7";
 108                 led-cur = /bits/ 8 <0x14>;
 109                 max-cur = /bits/ 8 <0x20>;
 110         };
 111
 112         chan7 {
 113                 chan-name = "d8";
 114                 led-cur = /bits/ 8 <0x14>;
 115                 max-cur = /bits/ 8 <0x20>;
 116         };
 117
 118         chan8 {
 119                 chan-name = "d9";
 120                 led-cur = /bits/ 8 <0x14>;
 121                 max-cur = /bits/ 8 <0x20>;
 122         };
 123 };
 124
 125 example 3) LP5562
 126 4 channels are defined.
 127
 128 lp5562@30 {
 129         compatible = "ti,lp5562";
 130         reg = <0x30>;
 131         clock-mode = /bits/8 <2>;
 132
 133         chan0 {
 134                 chan-name = "R";
 135                 led-cur = /bits/ 8 <0x20>;
 136                 max-cur = /bits/ 8 <0x60>;
 137         };
 138
 139         chan1 {
 140                 chan-name = "G";
 141                 led-cur = /bits/ 8 <0x20>;
 142                 max-cur = /bits/ 8 <0x60>;
 143         };
 144
 145         chan2 {
 146                 chan-name = "B";
 147                 led-cur = /bits/ 8 <0x20>;
 148                 max-cur = /bits/ 8 <0x60>;
 149         };
 150
 151         chan3 {
 152                 chan-name = "W";
 153                 led-cur = /bits/ 8 <0x20>;
 154                 max-cur = /bits/ 8 <0x60>;
 155         };
 156 };
 157
 158 example 4) LP8501
 159 9 channels are defined. The 'pwr-sel' is LP8501 specific property.
 160 Others are same as LP5523.
 161
 162 lp8501@32 {
 163         compatible = "ti,lp8501";
 164         reg = <0x32>;
 165         clock-mode = /bits/ 8 <2>;
 166         pwr-sel = /bits/ 8 <3>; /* D1~9 connected to VOUT */
 167
 168         chan0 {
 169                 chan-name = "d1";
 170                 led-cur = /bits/ 8 <0x14>;
 171                 max-cur = /bits/ 8 <0x20>;
 172         };
 173
 174         chan1 {
 175                 chan-name = "d2";
 176                 led-cur = /bits/ 8 <0x14>;
 177                 max-cur = /bits/ 8 <0x20>;
 178         };
 179
 180         chan2 {
 181                 chan-name = "d3";
 182                 led-cur = /bits/ 8 <0x14>;
 183                 max-cur = /bits/ 8 <0x20>;
 184         };
 185
 186         chan3 {
 187                 chan-name = "d4";
 188                 led-cur = /bits/ 8 <0x14>;
 189                 max-cur = /bits/ 8 <0x20>;
 190         };
 191
 192         chan4 {
 193                 chan-name = "d5";
 194                 led-cur = /bits/ 8 <0x14>;
 195                 max-cur = /bits/ 8 <0x20>;
 196         };
 197
 198         chan5 {
 199                 chan-name = "d6";
 200                 led-cur = /bits/ 8 <0x14>;
 201                 max-cur = /bits/ 8 <0x20>;
 202         };
 203
 204         chan6 {
 205                 chan-name = "d7";
 206                 led-cur = /bits/ 8 <0x14>;
 207                 max-cur = /bits/ 8 <0x20>;
 208         };
 209
 210         chan7 {
 211                 chan-name = "d8";
 212                 led-cur = /bits/ 8 <0x14>;
 213                 max-cur = /bits/ 8 <0x20>;
 214         };
 215
 216         chan8 {
 217                 chan-name = "d9";
 218                 led-cur = /bits/ 8 <0x14>;
 219                 max-cur = /bits/ 8 <0x20>;
 220         };
 221 };