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 cycle is about 167 msec, for 6Hz is about 83 msec.