1Kernel driver for Mellanox systems LEDs
2=======================================
3
4Provide system LED support for the nex Mellanox systems:
5"msx6710", "msx6720", "msb7700", "msn2700", "msx1410",
6"msn2410", "msb7800", "msn2740", "msn2100".
7
8Description
9-----------
10Driver 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
60Driver 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
109Driver supports HW blinking at 3Hz and 6Hz frequency (50% duty cycle).
110For 3Hz duty cylce is about 167 msec, for 6Hz is about 83 msec.
111