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 - enable-gpio: GPIO attached to the chip's enable pin
  14 - label: Used for naming LEDs
  15 - pwr-sel: LP8501 specific property. Power selection for output channels.
  16          0: D1~9 are connected to VDD
  17          1: D1~6 with VDD, D7~9 with VOUT
  18          2: D1~6 with VOUT, D7~9 with VDD
  19          3: D1~9 are connected to VOUT
  20
  21 Alternatively, each child can have a specific channel name and trigger:
  22 - chan-name (optional): name of channel
  23 - linux,default-trigger (optional): see
  24   Documentation/devicetree/bindings/leds/common.txt
  25
  26 example 1) LP5521
  27 3 LED channels, external clock used. Channel names are 'lp5521_pri:channel0',
  28 'lp5521_pri:channel1' and 'lp5521_pri:channel2', with a heartbeat trigger
  29 on channel 0.
  30
  31 lp5521@32 {
  32         compatible = "national,lp5521";
  33         reg = <0x32>;
  34         label = "lp5521_pri";
  35         clock-mode = /bits/ 8 <2>;
  36
  37         chan0 {
  38                 led-cur = /bits/ 8 <0x2f>;
  39                 max-cur = /bits/ 8 <0x5f>;
  40                 linux,default-trigger = "heartbeat";
  41         };
  42
  43         chan1 {
  44                 led-cur = /bits/ 8 <0x2f>;
  45                 max-cur = /bits/ 8 <0x5f>;
  46         };
  47
  48         chan2 {
  49                 led-cur = /bits/ 8 <0x2f>;
  50                 max-cur = /bits/ 8 <0x5f>;
  51         };
  52 };
  53
  54 example 2) LP5523
  55 9 LED channels with specific name. Internal clock used.
  56 The I2C slave address is configurable with ASEL1 and ASEL0 pins.
  57 Available addresses are 32/33/34/35h.
  58
  59 ASEL1    ASEL0    Address
  60 -------------------------
  61  GND      GND       32h
  62  GND      VEN       33h
  63  VEN      GND       34h
  64  VEN      VEN       35h
  65
  66 lp5523@32 {
  67         compatible = "national,lp5523";
  68         reg = <0x32>;
  69         clock-mode = /bits/ 8 <1>;
  70
  71         chan0 {
  72                 chan-name = "d1";
  73                 led-cur = /bits/ 8 <0x14>;
  74                 max-cur = /bits/ 8 <0x20>;
  75         };
  76
  77         chan1 {
  78                 chan-name = "d2";
  79                 led-cur = /bits/ 8 <0x14>;
  80                 max-cur = /bits/ 8 <0x20>;
  81         };
  82
  83         chan2 {
  84                 chan-name = "d3";
  85                 led-cur = /bits/ 8 <0x14>;
  86                 max-cur = /bits/ 8 <0x20>;
  87         };
  88
  89         chan3 {
  90                 chan-name = "d4";
  91                 led-cur = /bits/ 8 <0x14>;
  92                 max-cur = /bits/ 8 <0x20>;
  93         };
  94
  95         chan4 {
  96                 chan-name = "d5";
  97                 led-cur = /bits/ 8 <0x14>;
  98                 max-cur = /bits/ 8 <0x20>;
  99         };
 100
 101         chan5 {
 102                 chan-name = "d6";
 103                 led-cur = /bits/ 8 <0x14>;
 104                 max-cur = /bits/ 8 <0x20>;
 105         };
 106
 107         chan6 {
 108                 chan-name = "d7";
 109                 led-cur = /bits/ 8 <0x14>;
 110                 max-cur = /bits/ 8 <0x20>;
 111         };
 112
 113         chan7 {
 114                 chan-name = "d8";
 115                 led-cur = /bits/ 8 <0x14>;
 116                 max-cur = /bits/ 8 <0x20>;
 117         };
 118
 119         chan8 {
 120                 chan-name = "d9";
 121                 led-cur = /bits/ 8 <0x14>;
 122                 max-cur = /bits/ 8 <0x20>;
 123         };
 124 };
 125
 126 example 3) LP5562
 127 4 channels are defined.
 128
 129 lp5562@30 {
 130         compatible = "ti,lp5562";
 131         reg = <0x30>;
 132         clock-mode = /bits/8 <2>;
 133
 134         chan0 {
 135                 chan-name = "R";
 136                 led-cur = /bits/ 8 <0x20>;
 137                 max-cur = /bits/ 8 <0x60>;
 138         };
 139
 140         chan1 {
 141                 chan-name = "G";
 142                 led-cur = /bits/ 8 <0x20>;
 143                 max-cur = /bits/ 8 <0x60>;
 144         };
 145
 146         chan2 {
 147                 chan-name = "B";
 148                 led-cur = /bits/ 8 <0x20>;
 149                 max-cur = /bits/ 8 <0x60>;
 150         };
 151
 152         chan3 {
 153                 chan-name = "W";
 154                 led-cur = /bits/ 8 <0x20>;
 155                 max-cur = /bits/ 8 <0x60>;
 156         };
 157 };
 158
 159 example 4) LP8501
 160 9 channels are defined. The 'pwr-sel' is LP8501 specific property.
 161 Others are same as LP5523.
 162
 163 lp8501@32 {
 164         compatible = "ti,lp8501";
 165         reg = <0x32>;
 166         clock-mode = /bits/ 8 <2>;
 167         pwr-sel = /bits/ 8 <3>; /* D1~9 connected to VOUT */
 168
 169         chan0 {
 170                 chan-name = "d1";
 171                 led-cur = /bits/ 8 <0x14>;
 172                 max-cur = /bits/ 8 <0x20>;
 173         };
 174
 175         chan1 {
 176                 chan-name = "d2";
 177                 led-cur = /bits/ 8 <0x14>;
 178                 max-cur = /bits/ 8 <0x20>;
 179         };
 180
 181         chan2 {
 182                 chan-name = "d3";
 183                 led-cur = /bits/ 8 <0x14>;
 184                 max-cur = /bits/ 8 <0x20>;
 185         };
 186
 187         chan3 {
 188                 chan-name = "d4";
 189                 led-cur = /bits/ 8 <0x14>;
 190                 max-cur = /bits/ 8 <0x20>;
 191         };
 192
 193         chan4 {
 194                 chan-name = "d5";
 195                 led-cur = /bits/ 8 <0x14>;
 196                 max-cur = /bits/ 8 <0x20>;
 197         };
 198
 199         chan5 {
 200                 chan-name = "d6";
 201                 led-cur = /bits/ 8 <0x14>;
 202                 max-cur = /bits/ 8 <0x20>;
 203         };
 204
 205         chan6 {
 206                 chan-name = "d7";
 207                 led-cur = /bits/ 8 <0x14>;
 208                 max-cur = /bits/ 8 <0x20>;
 209         };
 210
 211         chan7 {
 212                 chan-name = "d8";
 213                 led-cur = /bits/ 8 <0x14>;
 214                 max-cur = /bits/ 8 <0x20>;
 215         };
 216
 217         chan8 {
 218                 chan-name = "d9";
 219                 led-cur = /bits/ 8 <0x14>;
 220                 max-cur = /bits/ 8 <0x20>;
 221         };
 222 };