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diff --git a/Documentation/hwmon/nct6775 b/Documentation/hwmon/nct6775 deleted file mode 100644 index bd59834d310f..000000000000 --- a/Documentation/hwmon/nct6775 +++ /dev/null @@ -1,212 +0,0 @@ -Note -==== - -This driver supersedes the NCT6775F and NCT6776F support in the W83627EHF -driver. - -Kernel driver NCT6775 -===================== - -Supported chips: - * Nuvoton NCT6102D/NCT6104D/NCT6106D - Prefix: 'nct6106' - Addresses scanned: ISA address retrieved from Super I/O registers - Datasheet: Available from the Nuvoton web site - * Nuvoton NCT5572D/NCT6771F/NCT6772F/NCT6775F/W83677HG-I - Prefix: 'nct6775' - Addresses scanned: ISA address retrieved from Super I/O registers - Datasheet: Available from Nuvoton upon request - * Nuvoton NCT5573D/NCT5577D/NCT6776D/NCT6776F - Prefix: 'nct6776' - Addresses scanned: ISA address retrieved from Super I/O registers - Datasheet: Available from Nuvoton upon request - * Nuvoton NCT5532D/NCT6779D - Prefix: 'nct6779' - Addresses scanned: ISA address retrieved from Super I/O registers - Datasheet: Available from Nuvoton upon request - * Nuvoton NCT6791D - Prefix: 'nct6791' - Addresses scanned: ISA address retrieved from Super I/O registers - Datasheet: Available from Nuvoton upon request - * Nuvoton NCT6792D - Prefix: 'nct6792' - Addresses scanned: ISA address retrieved from Super I/O registers - Datasheet: Available from Nuvoton upon request - * Nuvoton NCT6793D - Prefix: 'nct6793' - Addresses scanned: ISA address retrieved from Super I/O registers - Datasheet: Available from Nuvoton upon request - * Nuvoton NCT6795D - Prefix: 'nct6795' - Addresses scanned: ISA address retrieved from Super I/O registers - Datasheet: Available from Nuvoton upon request - * Nuvoton NCT6796D - Prefix: 'nct6796' - Addresses scanned: ISA address retrieved from Super I/O registers - Datasheet: Available from Nuvoton upon request - -Authors: - Guenter Roeck <linux@roeck-us.net> - -Description ------------ - -This driver implements support for the Nuvoton NCT6775F, NCT6776F, and NCT6779D -and compatible super I/O chips. - -The chips support up to 25 temperature monitoring sources. Up to 6 of those are -direct temperature sensor inputs, the others are special sources such as PECI, -PCH, and SMBUS. Depending on the chip type, 2 to 6 of the temperature sources -can be monitored and compared against minimum, maximum, and critical -temperatures. The driver reports up to 10 of the temperatures to the user. -There are 4 to 5 fan rotation speed sensors, 8 to 15 analog voltage sensors, -one VID, alarms with beep warnings (control unimplemented), and some automatic -fan regulation strategies (plus manual fan control mode). - -The temperature sensor sources on all chips are configurable. The configured -source for each of the temperature sensors is provided in tempX_label. - -Temperatures are measured in degrees Celsius and measurement resolution is -either 1 degC or 0.5 degC, depending on the temperature source and -configuration. An alarm is triggered when the temperature gets higher than -the high limit; it stays on until the temperature falls below the hysteresis -value. Alarms are only supported for temp1 to temp6, depending on the chip type. - -Fan rotation speeds are reported in RPM (rotations per minute). An alarm is -triggered if the rotation speed has dropped below a programmable limit. On -NCT6775F, fan readings can be divided by a programmable divider (1, 2, 4, 8, -16, 32, 64 or 128) to give the readings more range or accuracy; the other chips -do not have a fan speed divider. The driver sets the most suitable fan divisor -itself; specifically, it increases the divider value each time a fan speed -reading returns an invalid value, and it reduces it if the fan speed reading -is lower than optimal. Some fans might not be present because they share pins -with other functions. - -Voltage sensors (also known as IN sensors) report their values in millivolts. -An alarm is triggered if the voltage has crossed a programmable minimum -or maximum limit. - -The driver supports automatic fan control mode known as Thermal Cruise. -In this mode, the chip attempts to keep the measured temperature in a -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-fan5. - -sysfs attributes ----------------- - -pwm[1-7] - this file stores PWM duty cycle or DC value (fan speed) in range: - 0 (lowest speed) to 255 (full) - -pwm[1-7]_enable - this file controls mode of fan/temperature control: - * 0 Fan control disabled (fans set to maximum speed) - * 1 Manual mode, write to pwm[0-5] any value 0-255 - * 2 "Thermal Cruise" mode - * 3 "Fan Speed Cruise" mode - * 4 "Smart Fan III" mode (NCT6775F only) - * 5 "Smart Fan IV" mode - -pwm[1-7]_mode - controls if output is PWM or DC level - * 0 DC output - * 1 PWM output - -Common fan control attributes ------------------------------ - -pwm[1-7]_temp_sel Temperature source. Value is temperature sensor index. - For example, select '1' for temp1_input. -pwm[1-7]_weight_temp_sel - Secondary temperature source. Value is temperature - sensor index. For example, select '1' for temp1_input. - Set to 0 to disable secondary temperature control. - -If secondary temperature functionality is enabled, it is controlled with the -following attributes. - -pwm[1-7]_weight_duty_step - Duty step size. -pwm[1-7]_weight_temp_step - Temperature step size. With each step over - temp_step_base, the value of weight_duty_step is added - to the current pwm value. -pwm[1-7]_weight_temp_step_base - Temperature at which secondary temperature control kicks - in. -pwm[1-7]_weight_temp_step_tol - Temperature step tolerance. - -Thermal Cruise mode (2) ------------------------ - -If the temperature is in the range defined by: - -pwm[1-7]_target_temp Target temperature, unit millidegree Celsius - (range 0 - 127000) -pwm[1-7]_temp_tolerance - Target temperature tolerance, unit millidegree Celsius - -there are no changes to fan speed. Once the temperature leaves the interval, fan -speed increases (if temperature is higher that desired) or decreases (if -temperature is lower than desired), using the following limits and time -intervals. - -pwm[1-7]_start fan pwm start value (range 1 - 255), to start fan - when the temperature is above defined range. -pwm[1-7]_floor lowest fan pwm (range 0 - 255) if temperature is below - the defined range. If set to 0, the fan is expected to - stop if the temperature is below the defined range. -pwm[1-7]_step_up_time milliseconds before fan speed is increased -pwm[1-7]_step_down_time milliseconds before fan speed is decreased -pwm[1-7]_stop_time how many milliseconds must elapse to switch - corresponding fan off (when the temperature was below - defined range). - -Speed Cruise mode (3) ---------------------- - -This modes tries to keep the fan speed constant. - -fan[1-7]_target Target fan speed -fan[1-7]_tolerance - Target speed tolerance - - -Untested; use at your own risk. - -Smart Fan IV mode (5) ---------------------- - -This mode offers multiple slopes to control the fan speed. The slopes can be -controlled by setting the pwm and temperature attributes. When the temperature -rises, the chip will calculate the DC/PWM output based on the current slope. -There are up to seven data points depending on the chip type. Subsequent data -points should be set to higher temperatures and higher pwm values to achieve -higher fan speeds with increasing temperature. The last data point reflects -critical temperature mode, in which the fans should run at full speed. - -pwm[1-7]_auto_point[1-7]_pwm - pwm value to be set if temperature reaches matching - temperature range. -pwm[1-7]_auto_point[1-7]_temp - Temperature over which the matching pwm is enabled. -pwm[1-7]_temp_tolerance - Temperature tolerance, unit millidegree Celsius -pwm[1-7]_crit_temp_tolerance - Temperature tolerance for critical temperature, - unit millidegree Celsius - -pwm[1-7]_step_up_time milliseconds before fan speed is increased -pwm[1-7]_step_down_time milliseconds before fan speed is decreased - -Usage Notes ------------ - -On various ASUS boards with NCT6776F, it appears that CPUTIN is not really -connected to anything and floats, or that it is connected to some non-standard -temperature measurement device. As a result, the temperature reported on CPUTIN -will not reflect a usable value. It often reports unreasonably high -temperatures, and in some cases the reported temperature declines if the actual -temperature increases (similar to the raw PECI temperature value - see PECI -specification for details). CPUTIN should therefore be be ignored on ASUS -boards. The CPU temperature on ASUS boards is reported from PECI 0. |