Documentation/hwmon/it87.rst

174     - Christophe Gauthron
175     - Jean Delvare <jdelvare@suse.de>
179 -----------------
184     by either the battery or the onboard power supply. Only the first reading
192     misconfigured by BIOS - PWM values would be inverted. This option tries
209   Provided since there are reports that system-wide acpi_enfore_resources=lax
217 -------------------
219 All the chips supported by this driver are LPC Super-I/O chips, accessed
220 through the LPC bus (ISA-like I/O ports). The IT8712F additionally has an
228 -----------
241 The IT8712F and IT8716F additionally feature VID inputs, used to report
242 the Vcore voltage of the processor. The early IT8712F have 5 VID pins,
246 The IT8718F and IT8720F also features VID inputs (up to 8 pins) but the value
247 is stored in the Super-I/O configuration space. Due to technical limitations,
249 the driver won't notice and report changes in the VID value. The two
250 upper VID bits share their pins with voltage inputs (in5 and in6) so you
258 IT8783E/F, and late IT8712F and IT8705F also have optional 16-bit tachometer
260 not compatible with the older chips and revisions. The 16-bit tachometer mode
271 IT8728F. It only supports 3 fans, 16-bit fan mode, and the full speed mode
275 to IT8728F. It only supports 16-bit fan mode. Both chips support up to 6 fans.
277 The IT8790E, IT8792E/IT8795E and IT87952E support up to 3 fans. 16-bit fan
280 The IT8732F supports a closed-loop mode for fan control, but this is not
288 16-bit tachometer counters aren't used, fan readings can be divided by
310 The driver handles this transparently so user-space doesn't have to care.
312 The VID lines (IT8712F/IT8716F/IT8718F/IT8720F) encode the core voltage value:
321 once-only alarms.
323 Out-of-limit readings can also result in beeping, if the chip is properly
338 -----------------
349 read-only.
353 -------------------------------------------
379 -----------------------------
381 The driver supports temp[1-3]_offset sysfs attributes to adjust the reported
382 temperature for thermal diodes or diode-connected thermal transistors.