Documentation/hwmon/w83627ehf.rst

22   * Winbond W83627DHG-P
46   * Winbond W83667HG-B
54   * Nuvoton NCT6775F/W83667HG-I
73 	- Jean Delvare <jdelvare@suse.de>
74 	- Yuan Mu (Winbond)
75 	- Rudolf Marek <r.marek@assembler.cz>
76 	- David Hubbard <david.c.hubbard@gmail.com>
77 	- Gong Jun <JGong@nuvoton.com>
80 -----------
83 W83627DHG, W83627DHG-P, W83627UHG, W83667HG, W83667HG-B, W83667HG-I
90 and some automatic fan regulation strategies (plus manual fan control mode).
92 The temperature sensor sources on W82677HG-B, NCT6775F, and NCT6776F are
98 Temperatures are measured in degrees Celsius and measurement resolution is 1
100 resolution is 1 degC for W83667HG-B and 0.0 degC for NCT6775F and NCT6776F.
116 The driver supports automatic fan control mode known as Thermal Cruise.
121 The mode works for fan1-fan4. Mapping of temperatures to pwm outputs is as
124   temp1 -> pwm1
125   temp2 -> pwm2
126   temp3 -> pwm3 (not on 627UHG)
127   prog  -> pwm4 (not on 667HG and 667HG-B; the programmable setting is not
131 ----------
138 pwm[1-4]
143 pwm[1-4]_enable
146 	* 1 Manual mode, write to pwm file any value 0-255 (full speed)
147 	* 2 "Thermal Cruise" mode
155 	startup, and is only supported for W83677HG-B, NCT6775F, and NCT6776F.
163 pwm[1-4]_mode
166 	* 0 DC output (0 - 12v)
169 Thermal Cruise mode
170 -------------------
174 pwm[1-4]_target
175 		   set target temperature, unit millidegree Celsius
176 		   (range 0 - 127000)
177 pwm[1-4]_tolerance
178 		   tolerance, unit millidegree Celsius (range 0 - 15000)
184 pwm[1-4]_min_output
185 		   minimum fan speed (range 1 - 255), when the temperature
187 pwm[1-4]_stop_time
191 pwm[1-4]_start_output
192 		   minimum fan speed (range 1 - 255) when spinning up
193 pwm[1-4]_step_output
194 		   rate of fan speed change (1 - 255)
195 pwm[1-4]_stop_output
196 		   minimum fan speed (range 1 - 255) when spinning down
197 pwm[1-4]_max_output
198 		   maximum fan speed (range 1 - 255), when the temperature
205 ----------------------
209 different power-on default values, but BIOS should already be loading
237 0x50-0x55 and 0x650-0x657 marked as:
239 			    - "Test Register" for the EHF
240 			    - "Reserved Register" for the DHG
245 southbridge drives the fans. And the DHG supports SST, a one-wire serial bus.
247 The DHG-P has an additional automatic fan speed control mode named Smart Fan