1=======================================
  2Kernel driver for Mellanox systems LEDs
  3=======================================
  4
  5Provide system LED support for the nex Mellanox systems:
  6"msx6710", "msx6720", "msb7700", "msn2700", "msx1410",
  7"msn2410", "msb7800", "msn2740", "msn2100".
  8
  9Description
 10-----------
 11Driver provides the following LEDs for the systems "msx6710", "msx6720",
 12"msb7700", "msn2700", "msx1410", "msn2410", "msb7800", "msn2740":
 13
 14  - mlxcpld:fan1:green
 15  - mlxcpld:fan1:red
 16  - mlxcpld:fan2:green
 17  - mlxcpld:fan2:red
 18  - mlxcpld:fan3:green
 19  - mlxcpld:fan3:red
 20  - mlxcpld:fan4:green
 21  - mlxcpld:fan4:red
 22  - mlxcpld:psu:green
 23  - mlxcpld:psu:red
 24  - mlxcpld:status:green
 25  - mlxcpld:status:red
 26
 27 "status"
 28  - CPLD reg offset: 0x20
 29  - Bits [3:0]
 30
 31 "psu"
 32  - CPLD reg offset: 0x20
 33  - Bits [7:4]
 34
 35 "fan1"
 36  - CPLD reg offset: 0x21
 37  - Bits [3:0]
 38
 39 "fan2"
 40  - CPLD reg offset: 0x21
 41  - Bits [7:4]
 42
 43 "fan3"
 44  - CPLD reg offset: 0x22
 45  - Bits [3:0]
 46
 47 "fan4"
 48  - CPLD reg offset: 0x22
 49  - Bits [7:4]
 50
 51 Color mask for all the above LEDs:
 52
 53  [bit3,bit2,bit1,bit0] or
 54  [bit7,bit6,bit5,bit4]:
 55
 56	- [0,0,0,0] = LED OFF
 57	- [0,1,0,1] = Red static ON
 58	- [1,1,0,1] = Green static ON
 59	- [0,1,1,0] = Red blink 3Hz
 60	- [1,1,1,0] = Green blink 3Hz
 61	- [0,1,1,1] = Red blink 6Hz
 62	- [1,1,1,1] = Green blink 6Hz
 63
 64Driver provides the following LEDs for the system "msn2100":
 65
 66  - mlxcpld:fan:green
 67  - mlxcpld:fan:red
 68  - mlxcpld:psu1:green
 69  - mlxcpld:psu1:red
 70  - mlxcpld:psu2:green
 71  - mlxcpld:psu2:red
 72  - mlxcpld:status:green
 73  - mlxcpld:status:red
 74  - mlxcpld:uid:blue
 75
 76 "status"
 77  - CPLD reg offset: 0x20
 78  - Bits [3:0]
 79
 80 "fan"
 81  - CPLD reg offset: 0x21
 82  - Bits [3:0]
 83
 84 "psu1"
 85  - CPLD reg offset: 0x23
 86  - Bits [3:0]
 87
 88 "psu2"
 89  - CPLD reg offset: 0x23
 90  - Bits [7:4]
 91
 92 "uid"
 93  - CPLD reg offset: 0x24
 94  - Bits [3:0]
 95
 96 Color mask for all the above LEDs, excepted uid:
 97
 98  [bit3,bit2,bit1,bit0] or
 99  [bit7,bit6,bit5,bit4]:
100
101	- [0,0,0,0] = LED OFF
102	- [0,1,0,1] = Red static ON
103	- [1,1,0,1] = Green static ON
104	- [0,1,1,0] = Red blink 3Hz
105	- [1,1,1,0] = Green blink 3Hz
106	- [0,1,1,1] = Red blink 6Hz
107	- [1,1,1,1] = Green blink 6Hz
108
109 Color mask for uid LED:
110  [bit3,bit2,bit1,bit0]:
111
112	- [0,0,0,0] = LED OFF
113	- [1,1,0,1] = Blue static ON
114	- [1,1,1,0] = Blue blink 3Hz
115	- [1,1,1,1] = Blue blink 6Hz
116
117Driver supports HW blinking at 3Hz and 6Hz frequency (50% duty cycle).
118For 3Hz duty cycle is about 167 msec, for 6Hz is about 83 msec.