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hwmon: (it87) Updated documentation for recent updates to it87

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Updated the driver documentation to list all current chips and
describe the module parameters as per descriptions in the code.

Signed-off-by: Frank Crawford <frank@crawford.emu.id.au>
Link: https://lore.kernel.org/r/20230128060308.1549707-8-frank@crawford.emu.id.au
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Frank Crawford 2023-01-28 17:03:08 +11:00 committed by Guenter Roeck
parent d44cb4cd74
commit 0118905560
1 changed files with 42 additions and 5 deletions
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47
Documentation/hwmon/it87.rst
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@ -145,6 +145,22 @@ Supported chips:
Datasheet: Not publicly available
* IT8792E/IT8795E
Prefix: 'it8792'
Addresses scanned: from Super I/O config space (8 I/O ports)
Datasheet: Not publicly available
* IT87952E
Prefix: 'it87952'
Addresses scanned: from Super I/O config space (8 I/O ports)
Datasheet: Not publicly available
* SiS950 [clone of IT8705F]
Prefix: 'it87'
@ -162,7 +178,7 @@ Authors:
Module Parameters
-----------------
* update_vbat: int
* update_vbat bool
0 if vbat should report power on value, 1 if vbat should be updated after
each read. Default is 0. On some boards the battery voltage is provided
by either the battery or the onboard power supply. Only the first reading
@ -171,11 +187,31 @@ Module Parameters
the chip so can be read at any time. Excessive reading may decrease
battery life but no information is given in the datasheet.
* fix_pwm_polarity int
* fix_pwm_polarity bool
Force PWM polarity to active high (DANGEROUS). Some chips are
misconfigured by BIOS - PWM values would be inverted. This option tries
to fix this. Please contact your BIOS manufacturer and ask him for fix.
* force_id short, short
Force multiple chip ID to specified value, separated by ','.
For example "force_id=0x8689,0x8633". A value of 0 is ignored
for that chip.
Note: A single force_id value (e.g. "force_id=0x8689") is used for
all chips, to only set the first chip use "force_id=0x8689,0".
Should only be used for testing.
* ignore_resource_conflict bool
Similar to acpi_enforce_resources=lax, but only affects this driver.
ACPI resource conflicts are ignored if this parameter is provided and
set to 1.
Provided since there are reports that system-wide acpi_enfore_resources=lax
can result in boot failures on some systems.
Note: This is inherently risky since it means that both ACPI and this driver
may access the chip at the same time. This can result in race conditions and,
worst case, result in unexpected system reboots.
Hardware Interfaces
-------------------
@ -193,8 +229,8 @@ Description
This driver implements support for the IT8603E, IT8620E, IT8623E, IT8628E,
IT8705F, IT8712F, IT8716F, IT8718F, IT8720F, IT8721F, IT8726F, IT8728F, IT8732F,
IT8758E, IT8771E, IT8772E, IT8781F, IT8782F, IT8783E/F, IT8786E, IT8790E, and
SiS950 chips.
IT8758E, IT8771E, IT8772E, IT8781F, IT8782F, IT8783E/F, IT8786E, IT8790E,
IT8792E/IT8795E, IT87952E and SiS950 chips.
These chips are 'Super I/O chips', supporting floppy disks, infrared ports,
joysticks and other miscellaneous stuff. For hardware monitoring, they
@ -238,7 +274,8 @@ of the fan is not supported (value 0 of pwmX_enable).
The IT8620E and IT8628E are custom designs, hardware monitoring part is similar
to IT8728F. It only supports 16-bit fan mode. Both chips support up to 6 fans.
The IT8790E supports up to 3 fans. 16-bit fan mode is always enabled.
The IT8790E, IT8792E/IT8795E and IT87952E support up to 3 fans. 16-bit fan
mode is always enabled.
The IT8732F supports a closed-loop mode for fan control, but this is not
currently implemented by the driver.