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Diffstat (limited to 'Documentation/hwmon/w83627ehf')
| -rw-r--r-- | Documentation/hwmon/w83627ehf | 162 |
1 files changed, 110 insertions, 52 deletions
diff --git a/Documentation/hwmon/w83627ehf b/Documentation/hwmon/w83627ehf index 735c42a85ead..74d19ef11e1f 100644 --- a/Documentation/hwmon/w83627ehf +++ b/Documentation/hwmon/w83627ehf @@ -2,45 +2,79 @@ Kernel driver w83627ehf ======================= Supported chips: + * Winbond W83627EHF/EHG (ISA access ONLY) + Prefix: 'w83627ehf' + Addresses scanned: ISA address retrieved from Super I/O registers + Datasheet: not available + * Winbond W83627DHG + Prefix: 'w83627dhg' + Addresses scanned: ISA address retrieved from Super I/O registers + Datasheet: not available + * Winbond W83627DHG-P + Prefix: 'w83627dhg' + Addresses scanned: ISA address retrieved from Super I/O registers + Datasheet: not available + * Winbond W83627UHG + Prefix: 'w83627uhg' + Addresses scanned: ISA address retrieved from Super I/O registers + Datasheet: available from www.nuvoton.com + * Winbond W83667HG + Prefix: 'w83667hg' + Addresses scanned: ISA address retrieved from Super I/O registers + Datasheet: not available + * Winbond W83667HG-B + Prefix: 'w83667hg' + Addresses scanned: ISA address retrieved from Super I/O registers + Datasheet: Available from Nuvoton upon request + * Nuvoton NCT6775F/W83667HG-I + Prefix: 'nct6775' + Addresses scanned: ISA address retrieved from Super I/O registers + Datasheet: Available from Nuvoton upon request + * Nuvoton NCT6776F + Prefix: 'nct6776' + Addresses scanned: ISA address retrieved from Super I/O registers + Datasheet: Available from Nuvoton upon request + Authors: - Jean Delvare <jdelvare@suse.de> - Yuan Mu (Winbond) - Rudolf Marek <r.marek@assembler.cz> - David Hubbard <david.c.hubbard@gmail.com> - Gong Jun <JGong@nuvoton.com> + + - Jean Delvare <jdelvare@suse.de> + - Yuan Mu (Winbond) + - Rudolf Marek <r.marek@assembler.cz> + - David Hubbard <david.c.hubbard@gmail.com> + - Gong Jun <JGong@nuvoton.com> Description ----------- @@ -85,25 +119,30 @@ predefined temperature range. If the temperature goes out of range, fan is driven slower/faster to reach the predefined range again. The mode works for fan1-fan4. Mapping of temperatures to pwm outputs is as -follows: +follows:: -temp1 -> pwm1 -temp2 -> pwm2 -temp3 -> pwm3 (not on 627UHG) -prog -> pwm4 (not on 667HG and 667HG-B; the programmable setting is not - supported by the driver) + temp1 -> pwm1 + temp2 -> pwm2 + temp3 -> pwm3 (not on 627UHG) + prog -> pwm4 (not on 667HG and 667HG-B; the programmable setting is not + supported by the driver) /sys files ---------- -name - this is a standard hwmon device entry, it contains the name of - the device (see the prefix in the list of supported devices at - the top of this file) +name + this is a standard hwmon device entry, it contains the name of + the device (see the prefix in the list of supported devices at + the top of this file) + +pwm[1-4] + this file stores PWM duty cycle or DC value (fan speed) in range: -pwm[1-4] - this file stores PWM duty cycle or DC value (fan speed) in range: 0 (stop) to 255 (full) -pwm[1-4]_enable - this file controls mode of fan/temperature control: +pwm[1-4]_enable + this file controls mode of fan/temperature control: + * 1 Manual mode, write to pwm file any value 0-255 (full speed) * 2 "Thermal Cruise" mode * 3 "Fan Speed Cruise" mode @@ -121,33 +160,43 @@ pwm[1-4]_enable - this file controls mode of fan/temperature control: returned when reading pwm attributes is unrelated to SmartFan IV operation. -pwm[1-4]_mode - controls if output is PWM or DC level - * 0 DC output (0 - 12v) - * 1 PWM output +pwm[1-4]_mode + controls if output is PWM or DC level + + * 0 DC output (0 - 12v) + * 1 PWM output Thermal Cruise mode ------------------- If the temperature is in the range defined by: -pwm[1-4]_target - set target temperature, unit millidegree Celsius - (range 0 - 127000) -pwm[1-4]_tolerance - tolerance, unit millidegree Celsius (range 0 - 15000) +pwm[1-4]_target + set target temperature, unit millidegree Celsius + (range 0 - 127000) +pwm[1-4]_tolerance + tolerance, unit millidegree Celsius (range 0 - 15000) there are no changes to fan speed. Once the temperature leaves the interval, fan speed increases (temp is higher) or decreases if lower than desired. There are defined steps and times, but not exported by the driver yet. -pwm[1-4]_min_output - minimum fan speed (range 1 - 255), when the temperature - is below defined range. -pwm[1-4]_stop_time - how many milliseconds [ms] must elapse to switch - corresponding fan off. (when the temperature was below - defined range). -pwm[1-4]_start_output-minimum fan speed (range 1 - 255) when spinning up -pwm[1-4]_step_output- rate of fan speed change (1 - 255) -pwm[1-4]_stop_output- minimum fan speed (range 1 - 255) when spinning down -pwm[1-4]_max_output - maximum fan speed (range 1 - 255), when the temperature - is above defined range. +pwm[1-4]_min_output + minimum fan speed (range 1 - 255), when the temperature + is below defined range. +pwm[1-4]_stop_time + how many milliseconds [ms] must elapse to switch + corresponding fan off. (when the temperature was below + defined range). +pwm[1-4]_start_output + minimum fan speed (range 1 - 255) when spinning up +pwm[1-4]_step_output + rate of fan speed change (1 - 255) +pwm[1-4]_stop_output + minimum fan speed (range 1 - 255) when spinning down +pwm[1-4]_max_output + maximum fan speed (range 1 - 255), when the temperature + is above defined range. Note: last six functions are influenced by other control bits, not yet exported by the driver, so a change might not have any effect. @@ -161,26 +210,35 @@ different power-on default values, but BIOS should already be loading appropriate defaults. Note that bank selection must be performed as is currently done in the driver for all register addresses. -0x49: only on DHG, selects temperature source for AUX fan, CPU fan0 -0x4a: not completely documented for the EHF and the DHG documentation assigns - different behavior to bits 7 and 6, including extending the temperature - input selection to SmartFan I, not just SmartFan III. Testing on the EHF - will reveal whether they are compatible or not. - -0x58: Chip ID: 0xa1=EHF 0xc1=DHG -0x5e: only on DHG, has bits to enable "current mode" temperature detection and - critical temperature protection -0x45b: only on EHF, bit 3, vin4 alarm (EHF supports 10 inputs, only 9 on DHG) -0x552: only on EHF, vin4 -0x558: only on EHF, vin4 high limit -0x559: only on EHF, vin4 low limit -0x6b: only on DHG, SYS fan critical temperature -0x6c: only on DHG, CPU fan0 critical temperature -0x6d: only on DHG, AUX fan critical temperature -0x6e: only on DHG, CPU fan1 critical temperature - -0x50-0x55 and 0x650-0x657 are marked "Test Register" for the EHF, but "Reserved - Register" for the DHG +========================= ===================================================== +Register(s) Meaning +========================= ===================================================== +0x49 only on DHG, selects temperature source for AUX fan, + CPU fan0 +0x4a not completely documented for the EHF and the DHG + documentation assigns different behavior to bits 7 + and 6, including extending the temperature input + selection to SmartFan I, not just SmartFan III. + Testing on the EHF will reveal whether they are + compatible or not. +0x58 Chip ID: 0xa1=EHF 0xc1=DHG +0x5e only on DHG, has bits to enable "current mode" + temperature detection and critical temperature + protection +0x45b only on EHF, bit 3, vin4 alarm (EHF supports 10 + inputs, only 9 on DHG) +0x552 only on EHF, vin4 +0x558 only on EHF, vin4 high limit +0x559 only on EHF, vin4 low limit +0x6b only on DHG, SYS fan critical temperature +0x6c only on DHG, CPU fan0 critical temperature +0x6d only on DHG, AUX fan critical temperature +0x6e only on DHG, CPU fan1 critical temperature +0x50-0x55 and 0x650-0x657 marked as: + + - "Test Register" for the EHF + - "Reserved Register" for the DHG +========================= ===================================================== The DHG also supports PECI, where the DHG queries Intel CPU temperatures, and the ICH8 southbridge gets that data via PECI from the DHG, so that the |