Update pwm cached control registers before writing pwm enable

If pwmX_enable is written prior to displaying any attributes,
t87_update_pwm_ctrl() is never called, and the cached pwm registers
are never read before written. This results in bad values written
into various registers, and can result in operational failures.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Create the hwmon folder if it does not exist

IT8655E and IT8665E both support internal register scaling

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Force IT8790E and IT8792E into configuration mode

IT8790E and IT8792E need to be in configuration mode to avoid LPC bus errors.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Drop ACPI mutex code

The observed problems with IT8792E were after all not caused by ACPI
mutex problems, so drop that code for now.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Fix accesses to IT8792E

If IT8792E or a compatible chip such as IT8795 (which has the same chip ID,
0x8733) resides at SIO address 0x4e/0x4f, and another Super-IO chip is at
SIO address 0x2e/0x2f, the IT8792E causes a cycle decode problem when exiting
its configuration mode. This can result in access errors for both chips, and
may result in system hangs.

Never exit configuration mode for IT8792E to avoid the problem.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

README missing necessary build instructions

README missing necessary build instructions

IT8607 does not support the 1st fan, only fan2-3

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Drop FEAT_TEMP_OFFSET

Since we now count the number of temperature offset registers directly,
there is no need for the temperature offset feature flag anymore.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Add support for 6 temperature limit registers on IT8628E

IT8628E has 6 temperature limit registers, overlayed with VIN7..VIN9
limit registers, but only 3 temperature offset registers. Given that,
introduce separate variables for the number of temperature limit
registers and the number of temperature offset registers.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Declare dummy vid functions if needed

Some kernel configurations may have CONFIG_HWMON_VID disabled.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Provide blacklist module parameter to override blacklist.

Load module with blacklist=0 to override blacklist.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Mark 2nd Super-IO chip on AB350M-D3H as broken

Configuration register access of the second Super-IO chip on AB350M-D3H
is just as broken as the others and can result in the known system hang-up.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Merge pull request #27 from jmaggard10/master

Fix up support for IT8625E

Fix up support for IT8625E

Add missing scaling feature and fix broken temp type detection on temp
1-3 sensors.

Add support for IT8625E

This is mostly identical to IT8665E, with the exception of the
configuration bits for fans 4 and 5.

Signed-off-by: Justin Maggard <jmaggard@netgear.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Fix whitespace issues

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Initialize register pointers before using them

Register pointers have to be initialized before they can be used in
it87_check_pwm().

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Add Gigabyte AX370-Gaming 5 to IT8792E blacklist

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Introduce FEAT_NEW_TEMPMAP

Several recent chips have a different register definition for
temperature to pwm assignment. Introduce FEAT_NEW_TEMPMAP to reflect
this and assign to affected chips.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Fix up support for IT8613E

Feature detection and pwm temperature mapping differs from other chips.
Also disable pwm1, fan1, vin3, and vin6.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Add support for IT8613E

[groeck: Fix README]

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Blacklist IT8792E on AX370-Gaming K7

Accessing it may result in a system hang.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Disable access to 2nd Super-IO chip

It is known to be broken.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

FEAT_TEMP_PECI does not apply to multi-bank chips.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Add support for 11mV ADC

The ADC LSB on some newer chips such as IT8613E and IT8625E is
officially 11mV, not 10.9mV. Add support for it.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Fix up temp offset register addresses

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Various improvements

- Acquire acpi mutex (not supported in upstream kernel)
- Try to handle 0x4e access failures on Gigabyte boards
- Improve temperature register / limit / type support for recent chips

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Add limit support for temp 4-6

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Register map as CSV

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Add register map

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Add feature flag FEAT_FANCTL_ONOFF

Several recent chips don't support configuration bits to turn fan control
off entirely for the first three fans. Handle all of them with a
configuration flag.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Improve AVCC3 support

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Preliminary support for IT8655E

Assume it is similar to IT8665E with three instead of six fans.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Update TODO and README files

Add sections about preliminary support and what to report for unsupported
chips to README.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Add support for chip specific register sets

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Added preliminary support for IT8665E

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Separate internal scaling from 12mV ADC

Some chips have internal voltage scaling but 10.9mV ADC,
so we can no longer associate the 12mV ADC with internal scaling
but need a different flag to distinguish scaling support.

Also fix ADC resolution for IT8790E and IT8792E.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Add multi-bank and initial IT8686E support

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Force chip ID only if a chip has been found

If the reported chip ID is 0xffff, there is no chip, and forcing the chip
type does not add value.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Update TODO: 4th fan control for IT8732E is now supported

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Add 4th fan control and measurement for IT8732E

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Fix feature mask for IT8792E (IT8733E)

The chip features match those of IT8790E. Most important is the
ADC resolution, which is 12 mV, not 10.9 mV.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Do not overwrite bit 2..6 of pwm control registers

In IT8620E, after setting pwm control to manual, it was observed that
pwm values for fan 4..6 have reversed results (writing 0 results in fans
running at full speed, writing 255 results in fans turned off).

With the new PWM control, pwm polarity for pwm control 4..6 is specified
in its pwm control registers. Those registers are overwritten when setting
the pwm mode or the temperature mapping. Do not touch bit 2..6 of pwm
control registers on register writes to fix the problem.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Fix fan4_ctl detection for IT8620, IT8628

fan4 control is enabled if bit 2 of GPIO control register 4 is disabled,
not when it is enabled. Since the check is for the skip condition, it is
reversed. This applies to both IT8620 and IT8628.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Add TODO file

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Experimental support for IT8607E

Assume for now that in5 and in6 are supported, and that fan control
is standard (unlike IT8603E).

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Add preliminary support for IT8792E

The chip is similar to IT8732E, but supports only three fans
instead of four (the driver currently does not support the 4th
fan on IT8732E).

Note that the chip ID is 0x8733, not 0x8792 as one would expect.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Ensure that pwm control cache is current before updating values

If sensor attributes were never read, the pwm control data has not been
initiialized, which can cause wrong driver behavior. Ensure that cached
data is current before acting on it.

Reported-by: Kevin Folz <kfolz@evertz.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Improve IT8622 support

Configuration registers on ITE8622 are different to 8620 and 8628 and
require special handling. Also, the chip supports up to 5 pwm controls.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Add support for IT8622E

Originally-from: Kevin Folz <kfolz@evertz.com>.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Update README to match upstream documentation

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Add feature flag indicating that VIN3 is connected to 5V

On IT8622E and IT8628E, VIN3 is expected to be connected to +5V.
Add feature flag and reflect in input label.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Synchronize with upstream version

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Add support for IT8628E and IT8732F

Also synchronize with upstream version

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Support for newer autopwm, plus other changes and cleanup

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Various enhancements, cleanup, and fixes

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Rearrange code to avoid forward declarations

Fix superio enable sequence for SIO address 0x4e

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Add support for two Super-IO chips

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Various enhancements

Add support for 6 pwm channels on IT8620E
Fix pwm frequency value for newer chips
Add second pwm frequency control for newer chips

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Some cleanup, plus AVCC3 support for ITE8620E

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Experimental support for ITE8790E

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Formatting cleanup

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

sync README with upstream version

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Merge pull request #3 from Zlika/master

Add support for IT8786E

Add support for IT8786E.

Add feature flag for VID support

Newer chips don't typically support VID inputs or control.
Add a feature flag for VID support to simplify adding support
for new chips.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Add feature flags for fan count and 16-bit fan configuration

Fans 4-5 are not supported on all chips and revisions. Also, 16-bit fan
counters only need to be enabled on older chips. Provide feature flags
to simplify adding support for new chips.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Add support for IT8781F

IT8781F is mostly compatible to IT8782F. Major difference is that it only
supports four instead of six UART channels, and therefore does not share
the uart6 pins.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Synchronize with upstream version

Also ensure the driver still builds with the latest upstream kernel.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

sync w/ upstream, plus preliminary PECI support

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

fix offset register access

Signed-off-by: Guenter <groeck@groeck-desktop.(none)>

Add temperature offset register support, and lots of cleanup (experimental)

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

sync with upstream version

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Drop unsupported chips from README file

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

sync with Jean's generic version. Drop support for unknown/untested chips

... as too risky. Manual chip type override accomplishes the same.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Merge with latest upstream version

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Add compat.h for backwards compatibility

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

it87: VIN7 does not depend on bit 2 of reg2C

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

it87: Do not attempt to re-route VIN7

Re-routing VIN7 does not work as expected, so better leave it alone.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

it87: IT8781F and IT8782F support monitoring 5 fans

... according to the summary datasheets available at the ITE web site.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

it87: Add experimental support for IT8781F and IT8782F

Assume that IT8781F and IT8782F are compatible with IT8783E/F.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

it87: IT8783E/F only support three fans

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

it87: Add experimental support for IT8771E, IT8772E

Open Hardware Monitor considers IT8771E, IT8772E to be compatible with IT8721F.
Let's see if that is correct. Use at your own risk.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

it87: Remove artifact from initial code changes

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

it87: Support older kernels

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

it87: Add missing chip name

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

it87: Initial / experimental support for IT8783E/F

Signed-off-by: Guenter Roeck <linux@roeck-us.net>

it87: upstream version

Signed-off-by: Guenter Roeck <linux@roeck-us.net>