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Kernel driver for Mellanox systems LEDs
=======================================
Provide system LED support for the nex Mellanox systems:
"msx6710", "msx6720", "msb7700", "msn2700", "msx1410",
"msn2410", "msb7800", "msn2740", "msn2100".
Description
-----------
Driver provides the following LEDs for the systems "msx6710", "msx6720",
"msb7700", "msn2700", "msx1410", "msn2410", "msb7800", "msn2740":
mlxcpld:fan1:green
mlxcpld:fan1:red
mlxcpld:fan2:green
mlxcpld:fan2:red
mlxcpld:fan3:green
mlxcpld:fan3:red
mlxcpld:fan4:green
mlxcpld:fan4:red
mlxcpld:psu:green
mlxcpld:psu:red
mlxcpld:status:green
mlxcpld:status:red
"status"
CPLD reg offset: 0x20
Bits [3:0]
"psu"
CPLD reg offset: 0x20
Bits [7:4]
"fan1"
CPLD reg offset: 0x21
Bits [3:0]
"fan2"
CPLD reg offset: 0x21
Bits [7:4]
"fan3"
CPLD reg offset: 0x22
Bits [3:0]
"fan4"
CPLD reg offset: 0x22
Bits [7:4]
Color mask for all the above LEDs:
[bit3,bit2,bit1,bit0] or
[bit7,bit6,bit5,bit4]:
[0,0,0,0] = LED OFF
[0,1,0,1] = Red static ON
[1,1,0,1] = Green static ON
[0,1,1,0] = Red blink 3Hz
[1,1,1,0] = Green blink 3Hz
[0,1,1,1] = Red blink 6Hz
[1,1,1,1] = Green blink 6Hz
Driver provides the following LEDs for the system "msn2100":
mlxcpld:fan:green
mlxcpld:fan:red
mlxcpld:psu1:green
mlxcpld:psu1:red
mlxcpld:psu2:green
mlxcpld:psu2:red
mlxcpld:status:green
mlxcpld:status:red
mlxcpld:uid:blue
"status"
CPLD reg offset: 0x20
Bits [3:0]
"fan"
CPLD reg offset: 0x21
Bits [3:0]
"psu1"
CPLD reg offset: 0x23
Bits [3:0]
"psu2"
CPLD reg offset: 0x23
Bits [7:4]
"uid"
CPLD reg offset: 0x24
Bits [3:0]
Color mask for all the above LEDs, excepted uid:
[bit3,bit2,bit1,bit0] or
[bit7,bit6,bit5,bit4]:
[0,0,0,0] = LED OFF
[0,1,0,1] = Red static ON
[1,1,0,1] = Green static ON
[0,1,1,0] = Red blink 3Hz
[1,1,1,0] = Green blink 3Hz
[0,1,1,1] = Red blink 6Hz
[1,1,1,1] = Green blink 6Hz
Color mask for uid LED:
[bit3,bit2,bit1,bit0]:
[0,0,0,0] = LED OFF
[1,1,0,1] = Blue static ON
[1,1,1,0] = Blue blink 3Hz
[1,1,1,1] = Blue blink 6Hz
Driver supports HW blinking at 3Hz and 6Hz frequency (50% duty cycle).
For 3Hz duty cylce is about 167 msec, for 6Hz is about 83 msec.
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