On Sat, Feb 12, 2011 at 12:08 AM, Guenter Roeck <guenter.roeck@xxxxxxxxxxxx> wrote: >> >> [13561.120768] w83627ehf: Found NCT6775F chip at 0x290 >> [13561.121084] Reg 0028 = 45 >> [13561.121097] Reg 0029 = 4c >> [13561.121108] Reg 002a = 00 >> [13561.121119] Reg 003f = 00 >> [13561.121147] Reg 0630 = 0045 >> [13561.121166] Reg 0631 = 4500 >> [13561.121186] Reg 0632 = 004c >> [13561.121205] Reg 0633 = 4c00 >> [13561.121225] Reg 0634 = 0000 >> [13561.121244] Reg 0635 = 0000 >> [13561.121263] Reg 0636 = 0000 >> [13561.121283] Reg 0637 = 0000 >> >> > >> > According to the datasheet, register 0x28 and 0x631 should match, 0x29 should >> > match 0x633, 0x2a should match 0x635, and 0x3f should match 0x637. >> >> Doesn't look like it. You might be off by one, or maybe there's an >> endianness issue. >> > No, it is ok, since the registers are detected as 16 bit registers. Reading from 0x630 > really reads from 0x630 and 0x631, and the result is as expected (ie the read from 0x630 > returns the same as the read from 0x28, and both is 0x45). > > But then this should translate to a fan1 value of (1350000 / (0x45 * divisor)), > ie be reported as a value somewhere between 19565 if the divisor is 1 to > 153 if the divisor is 128. I must be missing something. > > Odd is that if I simulate fan speed reading, ie just assign 0x45 to fan[i] when > reading the fan speeds, I do get the expected speeds for the various divisor values. > So I don't really understand what is going on in your system. > > Can you possibly dump the raw values of nr, data->fan[nr], data->fan_div[nr], and > data->fan_from_reg(data->fan[nr], data->fan_div[nr]) in show_fan() ? With fan2_div = 32 (b/c fan2_min == 502), I get: [48429.734521] w83627ehf: Found NCT6775F chip at 0x290 [48429.734818] Reg 0028 = 47 [48429.734832] Reg 0029 = 00 [48429.734843] Reg 002a = 00 [48429.734855] Reg 003f = 00 [48429.734884] Reg 0630 = 0047 [48429.734905] Reg 0631 = 4700 [48429.734925] Reg 0632 = 0000 [48429.734945] Reg 0633 = 0000 [48429.734965] Reg 0634 = 0000 [48429.734986] Reg 0635 = 0000 [48429.735006] Reg 0636 = 0000 [48429.735026] Reg 0637 = 0000 [48437.765900] nr=1, fan=0, fan_div=4, fan_from_reg=0 <<< reading fan2_input With fan2_min == 100 (i.e. fan2_div == 128) I get: [48525.613069] w83627ehf: Found NCT6775F chip at 0x290 [48525.613686] Reg 0028 = 47 [48525.613698] Reg 0029 = 4c [48525.613708] Reg 002a = 00 [48525.613719] Reg 003f = 00 [48525.613754] Reg 0630 = 0047 [48525.613772] Reg 0631 = 4700 [48525.613796] Reg 0632 = 004c [48525.613813] Reg 0633 = 4c00 [48525.613829] Reg 0634 = 0000 [48525.613846] Reg 0635 = 0000 [48525.613863] Reg 0636 = 0000 [48525.613880] Reg 0637 = 0000 [48533.156472] nr=1, fan=77, fan_div=7, fan_from_reg=136 Maybe those 8 high bits just don't work? Is there some flag to set to put the chip in 16-bit mode? --Andy _______________________________________________ lm-sensors mailing list lm-sensors@xxxxxxxxxxxxxx http://lists.lm-sensors.org/mailman/listinfo/lm-sensors
