nct6775: Monitor additional temperature registers

The number of SMIOVT registers on NCT6779 and NCT6791 is limited to 2.
As result, the driver may not report some of the temperatures used for fan
control. Fortunately, the chip has registers to monitor those temperatures.
Add them to the list of temperatures to report.

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

README: Add comment about ASUS desktop boards

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

Update compat.h to improve support of older kernels.

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

temp[] array needs to have an entry for temp_lcrit

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

hwmon: (nct6775) Avoid using device platform data outside probe function

Plan going forward is to attach all device attributes to the hwmon device and no
longer to the platform device. With that change, accessing platform data outside
the probe function will be more difficult. To avoid the problem, change code
to no longer rely on it.

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

Add support for NCT6791D.

Signed-off-by: David Bartley <andareed@gmail.com>

Add beep support

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

Fix temperature alarms

Which temperatures generate alarms is not fixed but determined by
the temperature source mapping.

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

Do not assign non-existing over-temperature and hysteresis registers

Overtemperature and hysteresis registers only exist for primary
temperature registers, not for alternates.

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

Replace SENSORS_LIMIT in lm75.h with clamp_val

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

Synchronize with upstream version

Coding style impreovements
Improve sensor template definitions

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

Add LICENSE file

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

Fix reported use of unassigned variable

In some conditions, the compiler reports the use of address as returned
from nct6775_find to be unassigned. Fix by returning it as return value
together with the error.

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

Update README

Signed-off-by: Guenter <groeck@desktop.roeck-us.net>

Foermatting changes: Fix checkpatch problems

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

Add support for critical low/high temperature limits on NCT6106

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

Add support for NCT6102D/6106D

Basic testing.

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

Use ARRAY_SIZE for loops where possible

This ensures that the loop iterations are correct even if/when
the number of elements in an array changes.

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

Enable both VIN3 and AUXTIN

Both are reported at the same time on SuperMicro C7H61.

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

Support up to two SuperIO chips in the same system

Support both SuperIO chips on SuperMicro C7H61-O.

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

nct6775: Allocate and create attributes from templates

This patch significantly reduces the amount of boiler-plate code.
Module size is reduced by more than 20k.

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

clarify supported chips

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

Drop read/write lock

The read/write lock is acquired for each read/write operation from/to the chip.
This occurs either during initialization, when it is not needed, or during
updates, when the update_lock is held as well, and it is not needed either.

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

Improve temperature register array declarations

Specify explicit sizes for temperature register arrays.

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

nct6775: Use clamp_val instead of SENSORS_LIMIT

SENSORS_LIMIT has been deprecated and was removed from the upstream kernel.

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

nct6775: Don't report VID if not supported

VID support is configured with CR2a on NCT6775 and NCT6776, so we can detect
if it is enabled. NCT6779 does not support VID at all.

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

README: Add note about testing and review feedback

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

Add README.ASRock

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

Minor bug fixes; include compat.h

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

Spelling fix in README

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

Latest code; sync with proposed kernel version

Many attribute changes.

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

Add backward compatibility to nct6775.c

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

Add backward compatibility support

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

Cleanup

Sort register definitions by chip type. Improve parameter alignment.

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

hwmon: (nct6775) Fix temp array overflow

With the addition of tempX_crit, there are four sets of temperature values
in the temp[][] array, but it was declared with a size of three. Fix it.

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

Update README

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

REG_PWM_TEMP is not used, drop it.

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

cosmetic: Formatting change

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

Add missing break statement

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

Improve error return from clear_caseopen

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

implement pwmX_step_enable

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

Implement superio access locking

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

Replace __initdata with __initconst

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

Clean up probe function: Use devm_request_region

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

Fix various registers for NCT6779

Also always display all VINx and AUXTINx channels, since we can not be sure
what is really enabled/used.

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

Remove temp11..temp15, and modify pwm temp source selection

It does not provide real value as temperatures are already reported.
Select pwm* temperature source index values based on tempX attributes
instead of chip values to make the pwm temperature source selection
more generic.

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

Add support for critical temperature on PECI sources

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

Alternate temp registers only needed locally

thus remove persistent pointer and use a local variable instead

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

Some minor fan related cleanup

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

Revert "All NCT677X chips support RPM registers, so read the RPM directly"

This reverts commit d82b291af288a77835721c2792bbf1478cd25a58.

Sounded like a good idea, but NCT6776 returns an RPM > 0 even
if no fan is connected.

All NCT677X chips support RPM registers, so read the RPM directly

This is simpler than reading the fan count register and calculating RPM from it.

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

nct6779: Fix vinX_min and vinX_max for in9..in14.

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

Fix number of temp registers for NCT6779

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

Temperature source selection fixes

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

NCT6779 supports fan3min and fan4min.

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

Fix fan count registers for NCT6779

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

Update debug message for invalid source register

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

Check for invalid temperature source

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

Minor cosmetic cleanup

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

Auso-generate have_in bit mask

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

Fix size of NCT6775_REG_TEMP_ALTERNATE array

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

Fix checkpatch warnings

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

Fix temp10_max_hyst

temp9_max_hyst was defined twice, and temp10_max_hyst was missing

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

Update some NCT6779 registers

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

Reset caseopen clear bit after setting it

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

Convert status (alarm) register accesses to indexed mode

This enables support for different status register (alarm) bit maps.

Also convert caseopen status access to use real-time status register bits
instead of interrupt bits.

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

Add NCT6776F usage note

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

Define TESTING flag, remove debug output

Only support alternate temperature registers if TESTING is enabled.

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

Add support for more temperatures

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

Fix maximum temperature source index

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

Update README

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

Find additonal temp registers and enable monitoring if possible

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

Add support for max_output and step_output, and re-enable SmartFan III support on NCT6775

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

Add support for pwmX_stop_output_enable

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

Add support for fixed temperature registers supported by NCT6779D

NCT6779D supports a fixed set of temperature registers in addition to the
registers with dymanically configured source. Add support for it.

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

Refactor code to allow up to 6 fixed temperature sources

Support SYSTIN, CPUTIN, AUXTIN0..3 (for NCT6779D)

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

Distinguish thermal temp diode / diode (types 1, 3)

Make diode type configurable.
Assign first three sensors to fixed types (SYSTIN, CPUTIN, AUXTIN).
Dynamic types start from index 4.

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

Coding style cleanup

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

Convert REG_CONFIG to pointer

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

Convert REG_VBAT to pointer

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

Weight register support

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

lots of weight related and other changes

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

Add support for temp offset register, and secondary pwm temp source register

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

Add support for temperature offset register / attributes

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

Prepare for NCT6102/6106

Convert direct register accesses to chip type indexed accesses
Convert macro generated functions to real functions

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

Driver should not rely or depend on setting platform_drvdata to NULL

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

fix some array sizes

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

Add attributes to set pwm temperature source

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

rework temperature display

temp[1..6] now always display SMIOVT[1..6] monitoring sources.
temp[7..11] displays fan control temperature sources.

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

Drop support for SmartFan III

It only exists on NCT6775. Supporting it only makes the driver more complex
for little value.

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

Add capability to turn fan control off (set max speed)

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

fix ABI (hysteresis -> temp_hyst)

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

Update README to reflect that ABI is not final.

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

Add README

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

Replace tolerance with auto_point_hysteresis attributes

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

nct6775: initial version

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