Documentation/hwmon/asc7621.rst

20 Andigilog has both the PECI and pre-PECI versions of the Heceta-6, as
21 Intel calls them. Heceta-6e has high frequency PWM and Heceta-6p has
23 Heceta-6e part and aSC7621 is the Heceta-6p part. They are both in
28 have used registers below 20h for vendor-specific functions in addition
29 to those in the Intel-specified vendor range.
32 The fan speed control uses this finer value to produce a "step-less" fan
33 PWM output. These two bytes are "read-locked" to guarantee that once a
34 high or low byte is read, the other byte is locked-in until after the
37 sheet says 10-bits of resolution, although you may find the lower bits
47 We offer GPIO features on the former VID pins. These are open-drain
69 Intel configuration. This would be useful in multi-CPU systems with
74 fan types. We can also support pulse-stretched PWM so that 3-wire fans
81 --------------------------------------------------------------------------
87 Using a 10-bit ADC, the aSC7621 measures the temperature of two remote diode
97 temperature zones. Both high- and low-frequency PWM ranges are supported.
112 --------
114 - Supports PECI interface and monitors internal and remote thermal diodes
115 - 2-wire, SMBus 2.0 compliant, serial interface
116 - 10-bit ADC
117 - Monitors VCCP, 2.5V, 3.3V, 5.0V, and 12V motherboard/processor supplies
118 - Programmable autonomous fan control based on temperature readings
119 - Noise filtering of temperature reading for fan speed control
120 - 0.25C digital temperature sensor resolution
121 - 3 PWM fan speed control outputs for 2-, 3- or 4-wire fans and up to 4 fan
123 - Enhanced measured temperature to Temperature Zone assignment.
124 - Provides high and low PWM frequency ranges
125 - 3 GPIO pins for custom use
126 - 24-Lead QSOP package
132 the standards defined in "sysfs-interface".
184 temp[1-4]_smoothing_enable / temp[1-4]_smoothing_time
185 	Smooths spikes in temp readings caused by noise.
197 temp[1-4]_crit
201 temp[5-8]_input / temp[5-8]_enable
207 pwm[1-3]_enable
215 	4-254		Ignored.
219 pwm[1-3]_auto_channels
220 	Bitmap as described in sysctl-interface with the following
243 pwm[1-3]_invert
244 	When set, inverts the meaning of pwm[1-3].
248 pwm[1-3]_freq