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Diffstat (limited to 'Documentation/leds/leds-mlxcpld.txt')
| -rw-r--r-- | Documentation/leds/leds-mlxcpld.txt | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/Documentation/leds/leds-mlxcpld.txt b/Documentation/leds/leds-mlxcpld.txt new file mode 100644 index 000000000000..a0e8fd457117 --- /dev/null +++ b/Documentation/leds/leds-mlxcpld.txt @@ -0,0 +1,110 @@ +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. |