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Diffstat (limited to 'Documentation/leds/leds-mlxcpld.rst')
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diff --git a/Documentation/leds/leds-mlxcpld.rst b/Documentation/leds/leds-mlxcpld.rst new file mode 100644 index 000000000..528582429 --- /dev/null +++ b/Documentation/leds/leds-mlxcpld.rst @@ -0,0 +1,118 @@ +======================================= +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. |