Documentation/leds/leds-mlxcpld.txt

   1 Kernel driver for Mellanox systems LEDs
   2 =======================================
   3
   4 Provide system LED support for the nex Mellanox systems:
   5 "msx6710", "msx6720", "msb7700", "msn2700", "msx1410",
   6 "msn2410", "msb7800", "msn2740", "msn2100".
   7
   8 Description
   9 -----------
  10 Driver provides the following LEDs for the systems "msx6710", "msx6720",
  11 "msb7700", "msn2700", "msx1410", "msn2410", "msb7800", "msn2740":
  12   mlxcpld:fan1:green
  13   mlxcpld:fan1:red
  14   mlxcpld:fan2:green
  15   mlxcpld:fan2:red
  16   mlxcpld:fan3:green
  17   mlxcpld:fan3:red
  18   mlxcpld:fan4:green
  19   mlxcpld:fan4:red
  20   mlxcpld:psu:green
  21   mlxcpld:psu:red
  22   mlxcpld:status:green
  23   mlxcpld:status:red
  24
  25  "status"
  26   CPLD reg offset: 0x20
  27   Bits [3:0]
  28
  29  "psu"
  30   CPLD reg offset: 0x20
  31   Bits [7:4]
  32
  33  "fan1"
  34   CPLD reg offset: 0x21
  35   Bits [3:0]
  36
  37  "fan2"
  38   CPLD reg offset: 0x21
  39   Bits [7:4]
  40
  41  "fan3"
  42   CPLD reg offset: 0x22
  43   Bits [3:0]
  44
  45  "fan4"
  46   CPLD reg offset: 0x22
  47   Bits [7:4]
  48
  49  Color mask for all the above LEDs:
  50   [bit3,bit2,bit1,bit0] or
  51   [bit7,bit6,bit5,bit4]:
  52         [0,0,0,0] = LED OFF
  53         [0,1,0,1] = Red static ON
  54         [1,1,0,1] = Green static ON
  55         [0,1,1,0] = Red blink 3Hz
  56         [1,1,1,0] = Green blink 3Hz
  57         [0,1,1,1] = Red blink 6Hz
  58         [1,1,1,1] = Green blink 6Hz
  59
  60 Driver provides the following LEDs for the system "msn2100":
  61   mlxcpld:fan:green
  62   mlxcpld:fan:red
  63   mlxcpld:psu1:green
  64   mlxcpld:psu1:red
  65   mlxcpld:psu2:green
  66   mlxcpld:psu2:red
  67   mlxcpld:status:green
  68   mlxcpld:status:red
  69   mlxcpld:uid:blue
  70
  71  "status"
  72   CPLD reg offset: 0x20
  73   Bits [3:0]
  74
  75  "fan"
  76   CPLD reg offset: 0x21
  77   Bits [3:0]
  78
  79  "psu1"
  80   CPLD reg offset: 0x23
  81   Bits [3:0]
  82
  83  "psu2"
  84   CPLD reg offset: 0x23
  85   Bits [7:4]
  86
  87  "uid"
  88   CPLD reg offset: 0x24
  89   Bits [3:0]
  90
  91  Color mask for all the above LEDs, excepted uid:
  92   [bit3,bit2,bit1,bit0] or
  93   [bit7,bit6,bit5,bit4]:
  94         [0,0,0,0] = LED OFF
  95         [0,1,0,1] = Red static ON
  96         [1,1,0,1] = Green static ON
  97         [0,1,1,0] = Red blink 3Hz
  98         [1,1,1,0] = Green blink 3Hz
  99         [0,1,1,1] = Red blink 6Hz
 100         [1,1,1,1] = Green blink 6Hz
 101
 102  Color mask for uid LED:
 103   [bit3,bit2,bit1,bit0]:
 104         [0,0,0,0] = LED OFF
 105         [1,1,0,1] = Blue static ON
 106         [1,1,1,0] = Blue blink 3Hz
 107         [1,1,1,1] = Blue blink 6Hz
 108
 109 Driver supports HW blinking at 3Hz and 6Hz frequency (50% duty cycle).
 110 For 3Hz duty cylce is about 167 msec, for 6Hz is about 83 msec.