kernel/linux.git/drivers/hwmon/it87.c, branch linux-4.16.y

hwmon: (it87) Reapply probe path chip registers settings after resume

2017-08-13T15:24:38+00:00

After a suspend / resume cycle we possibly need to reapply chip registers settings that we had set or fixed in a probe path, since they might have been reset to default values or set incorrectly by a BIOS again. Tested on a Gigabyte M720-US3 board, which requires routing internal VCCH5V to in7 (and had it wrong again on resume from S3). Signed-off-by: Maciej S. Szmigiero [groeck: Return value from it87_resume_sio() is unused; make it void] Signed-off-by: Guenter Roeck

hwmon: (it87) Split out chip registers setting code on probe path

2017-08-13T15:24:38+00:00

This commit splits out chip registers setting code on probe path to separate functions so they can be reused for setting the device properly again when system resumes from suspend. While we are at it let's also make clear that on IT8720 and IT8782 it's the VCCH5V line that is (possibly) routed to in7. This will make it consistent with a similar message that it printed on IT8783. Signed-off-by: Maciej S. Szmigiero Signed-off-by: Guenter Roeck

hwmon: (it87) Avoid registering the same chip on both SIO addresses

2017-03-22T07:18:21+00:00

IT8705F is known to respond on both SIO addresses. Registering it twice may result in system lockups. Reported-by: Russell King Fixes: e84bd9535e2b ("hwmon: (it87) Add support for second Super-IO chip") Signed-off-by: Guenter Roeck

hwmon: (it87) Add support for IT8792E

2017-02-11T05:35:08+00:00

The chip is similar to IT8732E, but supports only three fans and pwm outputs instead of four (the driver currently does not support the 4th fan and pwm output of IT8732E). Note that the chip ID is 0x8733, not 0x8792 as one would expect. Signed-off-by: Guenter Roeck

hwmon: (it87) Do not overwrite bit 2..6 of pwm control registers

2017-02-11T05:35:08+00:00

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. Cc: stable@vger.kernel.org # 4.9+ Signed-off-by: Guenter Roeck

hwmon: (it87) Fix pwm4 detection for IT8620 and IT8628

2017-02-11T05:35:08+00:00

pwm4 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. Fixes: 36c4d98a7883d ("hwmon: (it87) Add support for all pwm channels ...") Signed-off-by: Guenter Roeck

hwmon: (it87) Ensure that pwm control cache is current before updating values

2017-02-11T05:35:08+00:00

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. Cc: stable@vger.kernel.org # 4.4+ Reported-by: Kevin Folz Signed-off-by: Guenter Roeck

hwmon: (it87) Improve IT8622 support

2017-02-11T05:35:08+00:00

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

hwmon: (it87) Add support for IT8622E

2017-02-11T05:35:08+00:00

IT8622E is similar to IT8620E, but only supports five pwm controls and five fan tachometers. Originally-from: Kevin Folz . Signed-off-by: Guenter Roeck

hwmon: (it87) Add feature flag indicating that VIN3 is connected to 5V

2017-02-11T05:35:08+00:00

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