leds-bcm6358.txt

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    1 LEDs connected to Broadcom BCM6358 controller
    2 
    3 This controller is present on BCM6358 and BCM6368.
    4 In these SoCs there are Serial LEDs (LEDs connected to a 74x164 controller),
    5 which can either be controlled by software (exporting the 74x164 as spi-gpio.
    6 See Documentation/devicetree/bindings/gpio/fairchild,74hc595.yaml), or
    7 by hardware using this driver.
    8 
    9 Required properties:
   10   - compatible : should be "brcm,bcm6358-leds".
   11   - #address-cells : must be 1.
   12   - #size-cells : must be 0.
   13   - reg : BCM6358 LED controller address and size.
   14 
   15 Optional properties:
   16   - brcm,clk-div : SCK signal divider. Possible values are 1, 2, 4 and 8.
   17     Default : 1
   18   - brcm,clk-dat-low : Boolean, makes clock and data signals active low.
   19     Default : false
   20 
   21 Each LED is represented as a sub-node of the brcm,bcm6358-leds device.
   22 
   23 LED sub-node required properties:
   24   - reg : LED pin number (only LEDs 0 to 31 are valid).
   25 
   26 LED sub-node optional properties:
   27   - label : see Documentation/devicetree/bindings/leds/common.txt
   28   - active-low : Boolean, makes LED active low.
   29     Default : false
   30   - default-state : see
   31     Documentation/devicetree/bindings/leds/common.txt
   32   - linux,default-trigger : see
   33     Documentation/devicetree/bindings/leds/common.txt
   34 
   35 Examples:
   36 Scenario 1 : BCM6358
   37         leds0: led-controller@fffe00d0 {
   38                 compatible = "brcm,bcm6358-leds";
   39                 #address-cells = <1>;
   40                 #size-cells = <0>;
   41                 reg = <0xfffe00d0 0x8>;
   42 
   43                 alarm_white {
   44                         reg = <0>;
   45                         active-low;
   46                         label = "white:alarm";
   47                 };
   48                 tv_white {
   49                         reg = <2>;
   50                         active-low;
   51                         label = "white:tv";
   52                 };
   53                 tel_white {
   54                         reg = <3>;
   55                         active-low;
   56                         label = "white:tel";
   57                 };
   58                 adsl_white {
   59                         reg = <4>;
   60                         active-low;
   61                         label = "white:adsl";
   62                 };
   63         };
   64 
   65 Scenario 2 : BCM6368
   66         leds0: led-controller@100000d0 {
   67                 compatible = "brcm,bcm6358-leds";
   68                 #address-cells = <1>;
   69                 #size-cells = <0>;
   70                 reg = <0x100000d0 0x8>;
   71                 brcm,pol-low;
   72                 brcm,clk-div = <4>;
   73 
   74                 power_red {
   75                         reg = <0>;
   76                         active-low;
   77                         label = "red:power";
   78                 };
   79                 power_green {
   80                         reg = <1>;
   81                         active-low;
   82                         label = "green:power";
   83                         default-state = "on";
   84                 };
   85                 power_blue {
   86                         reg = <2>;
   87                         label = "blue:power";
   88                 };
   89                 broadband_red {
   90                         reg = <3>;
   91                         active-low;
   92                         label = "red:broadband";
   93                 };
   94                 broadband_green {
   95                         reg = <4>;
   96                         label = "green:broadband";
   97                 };
   98                 broadband_blue {
   99                         reg = <5>;
  100                         active-low;
  101                         label = "blue:broadband";
  102                 };
  103                 wireless_red {
  104                         reg = <6>;
  105                         active-low;
  106                         label = "red:wireless";
  107                 };
  108                 wireless_green {
  109                         reg = <7>;
  110                         active-low;
  111                         label = "green:wireless";
  112                 };
  113                 wireless_blue {
  114                         reg = <8>;
  115                         label = "blue:wireless";
  116                 };
  117                 phone_red {
  118                         reg = <9>;
  119                         active-low;
  120                         label = "red:phone";
  121                 };
  122                 phone_green {
  123                         reg = <10>;
  124                         active-low;
  125                         label = "green:phone";
  126                 };
  127                 phone_blue {
  128                         reg = <11>;
  129                         label = "blue:phone";
  130                 };
  131                 upgrading_red {
  132                         reg = <12>;
  133                         active-low;
  134                         label = "red:upgrading";
  135                 };
  136                 upgrading_green {
  137                         reg = <13>;
  138                         active-low;
  139                         label = "green:upgrading";
  140                 };
  141                 upgrading_blue {
  142                         reg = <14>;
  143                         label = "blue:upgrading";
  144                 };
  145         };

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