Commit graph

1181 commits

Author SHA1 Message Date
Jean Delvare
44c1bcd4bc hwmon: (it87) Add support for the IT8721F/IT8758E
Add support for the IT8721F/IT8758E. These new chips differ from the
older IT87xxF chips in the following ways:
* ADC LSB is 12 mV instead of 16 mV.
* PWM values are 8-bit instead of 7-bit.
There are other minor changes we don't have to care about in the
driver.

Another change is that we will handle internal voltage scaling in the
driver instead of delegating the work to user-space.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-10-28 20:31:51 +02:00
Jean Delvare
0df6454da9 hwmon: (it87) Move conversion functions
Move conversion functions until after structure defintions. This is
needed for future changes which make use of the structures in the
conversion funtcions.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-10-28 20:31:51 +02:00
Jean Delvare
0b22ce3b7d hwmon: Remove many EXPERIMENTAL flags
Remove the dependency on EXPERIMENTAL for all drivers which are in
the kernel tree for a long time, are known to work properly and for
which we have documentation.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Corentin Labbe <corentin.labbe@geomatys.fr>
Cc: Riku Voipio <riku.voipio@iki.fi>
Cc: Juerg Haefliger <juergh@gmail.com>
Acked-by: Guenter Roeck <guenter.roeck@ericsson.com>
2010-10-28 20:31:50 +02:00
Jean Delvare
f6c61cff8b hwmon: (lm85) Add support for ADT7468 high-frequency PWM mode
The ADT7468 supports a high-frequency PWM output mode where all PWM
outputs are driven by a 22.5 kHz clock. Add support for this mode, and
document it, as it may surprise the user that setting one PWM output
frequency also affects the other PWM outputs.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Darrick J. Wong <djwong@us.ibm.com>
Acked-by: Guenter Roeck <guenter.roeck@ericsson.com>
2010-10-28 20:31:50 +02:00
Jean Delvare
c36364dbf3 hwmon: (lm85) Document the ADT7468 as supported
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Darrick J. Wong <djwong@us.ibm.com>
Acked-by: Guenter Roeck <guenter.roeck@ericsson.com>
2010-10-28 20:31:50 +02:00
Jean Delvare
fa7a5797e5 hwmon: (lm85) Fix ADT7468 frequency table
The ADT7468 uses the same frequency table as the ADT7463.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: stable@kernel.org
Cc: Darrick J. Wong <djwong@us.ibm.com>
Acked-by: Guenter Roeck <guenter.roeck@ericsson.com>
2010-10-28 20:31:50 +02:00
Jean Delvare
918ee91c07 hwmon: I2C addresses are constant
We can mark normal_i2c const. Almost all drivers do that already, so
fix the 3 remaining ones before they are used as (bad) examples for
new drivers.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: George Joseph <george.joseph@fairview5.com>
Reviewed-by: Guenter Roeck <guenter.roeck@ericsson.com>
2010-10-28 20:31:50 +02:00
Jean Delvare
bd5f47ec96 Move ams driver to macintosh
The ams driver isn't a hardware monitoring driver, so it shouldn't
live under driver/hwmon. drivers/macintosh seems much more
appropriate, as the driver is only useful on PowerBooks and iBooks.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Guenter Roeck <guenter.roeck@ericsson.com>
Cc: Stelian Pop <stelian@popies.net>
Cc: Michael Hanselmann <linux-kernel@hansmi.ch>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Grant Likely <grant.likely@secretlab.ca>
2010-10-28 20:31:50 +02:00
Jean Delvare
6dfee85397 hwmon: (pcf8591) Don't attempt to detect devices
The PCF8591 can't be detected, don't even try. There are plenty of
other means to instantiate i2c devices these days.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Reviewed-by: Guenter Roeck <guenter.roeck@ericsson.com>
Cc: Aurelien Jarno <aurelien@aurel32.net>
2010-10-28 20:31:50 +02:00
Jean Delvare
4275fcd65d hwmon: (pcf8591) Register as a hwmon device
Register PCF8591 devices as hwmon devices. There's little point in
implementing the standard sysfs interface if we don't register it in
a way libsensors will pick it.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Reviewed-by: Guenter Roeck <guenter.roeck@ericsson.com>
Cc: Aurelien Jarno <aurelien@aurel32.net>
2010-10-28 20:31:49 +02:00
Jean Delvare
2437710102 hwmon: (w83795) Use standard attributes for chassis intrusion
Follow the standard attribute naming for the chassis intrusion
feature. I couldn't test the beeping (my board apparently doesn't do
that) but the alarm works fine.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Guenter Roeck <guenter.roeck@ericsson.com>
2010-10-28 20:31:49 +02:00
Jean Delvare
00030af231 hwmon: (w83795) Exclude fan control feature by default
The fan control feature of the w83795 driver is insufficiently
reviewed and tested for public consumption at this time, so make it
optional and disabled by default. We will change the default when
review and testing is deemed sufficient. Ultimately the option will
go away.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Guenter Roeck <guenter.roeck@ericsson.com>
2010-10-28 20:31:49 +02:00
Jean Delvare
e3760b432d hwmon: (w83795) Add myself as co-author and maintainer
I've made so many changes to the w83795 driver that it's only fair to
list myself as a co-author. I'll also maintain the driver for some
time. There's more work needed on the driver for sure.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Guenter Roeck <guenter.roeck@ericsson.com>
2010-10-28 20:31:49 +02:00
Jean Delvare
eb02755a50 hwmon: (w83795) More style cleanups
Cleanups suggested by Guenter Roeck, falling into 4 categories:
* Swapping test orders, because if (var == CONSTANT) is much easier to
  read than if (CONSTANT == var).
* Simplifying comparisons with 0.
* Dropping unneeded masks.
* Dropping unneeded parentheses and curly braces.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Guenter Roeck <guenter.roeck@ericsson.com>
2010-10-28 20:31:49 +02:00
Jean Delvare
5d2cd958f7 hwmon: (w83795) Fix LSB reading of voltage limits
Wrong index caused the wrong register value to be read, resulting in
random LSB for voltage limits.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-10-28 20:31:49 +02:00
Jean Delvare
21fc977551 hwmon: (w83795) Use dev_get_drvdata() where possible
When we don't need the client pointer, calling dev_get_drvdata() is
more efficient that calling to_i2c_client() and then
i2c_get_clientdata().

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-10-28 20:31:49 +02:00
Jean Delvare
1bb3450ce5 hwmon: (w83795) Delay reading pwm config registers
Wait until we need the pwm config register values, instead of
pre-reading them. This saves over 1 second on modprobe on my test
system.

Obviously this time is added when first accessing pwm config
attributes, however not everybody will use them, so it seems unfair
to slow down driver loading (and thus boot) for an optional feature.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-10-28 20:31:48 +02:00
Jean Delvare
2ae61de905 hwmon: (w83795) Delay reading limit registers
Wait until we need the limit register values, instead of pre-reading
them. This saves 544 ms on modprobe on my test system. Obviously this
time is added when first running "sensors" or any other monitoring
application, but I think it is better than slowing down the boot.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-10-28 20:31:48 +02:00
Jean Delvare
0d7237bfd1 hwmon: (w83795) Move register reads to dedicated functions
Move initial register reads out of probe, to dedicated functions.
This makes the code clearer, and will be needed if we want to delay
calling these functions until they are needed, or want to call them
periodically.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Guenter Roeck <guenter.roeck@ericsson.com>
2010-10-28 20:31:48 +02:00
Jean Delvare
476a4e5d37 hwmon: (w83795) Pack similar register reads
Pack similar register reads using for loops.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-10-28 20:31:48 +02:00
Jean Delvare
fd7f82b8a3 hwmon: (w83795) Make W83795_REG_PWM more efficient
Cascaded conditionals are inefficient. Reorder the fields so that
PWM register addresses can be computed more efficiently.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Guenter Roeck <guenter.roeck@ericsson.com>
2010-10-28 20:31:48 +02:00
Jean Delvare
5f7b77cbd4 hwmon: (w83795) Don't pre-read values we'll update later
There is no point in reading registers during initialization if we
will refresh the values in the update function later. This is only
slowing down the driver loading with no benefit, stop doing it.
This change saves 480 ms on driver load on my test system.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-10-28 20:31:48 +02:00
Jean Delvare
39deb6993e hwmon: (w83795) Simplify temperature sensor type handling
All 3 temperature sensor type sysfs functions (show_temp_mode,
store_temp_mode and show_dts_mode) can be simplified. We don't
create these files when the correponding input isn't in temperature
monitoring mode, so there is no point in handling that case.
Likewise, we don't allow changing inputs from temperature to voltage,
so the code handling this case is dead and can be removed.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-10-28 20:31:48 +02:00
Jean Delvare
cd316df582 hwmon: (w83795) Drop _NUM constants
Consistently use ARRAY_SIZE() to control for loops.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-10-28 20:31:48 +02:00
Jean Delvare
49c7347a44 hwmon: (w83795) Drop REST_VLT_BEGIN/END
Get rid of REST_VLT_BEGIN and REST_VLT_END, they don't make the code
more readable.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-10-28 20:31:48 +02:00
Jean Delvare
7eb8d508b5 hwmon: (w83795) Fix parity checks
x % 1 is obviously wrong, as it always evaluates to 0. You want
x % 2, or x & 1, for parity checking.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-10-28 20:31:47 +02:00
Jean Delvare
a654b9d4e7 hwmon: (w83795) Get rid of VRLSB_SHIFT
VRLSB_SHIFT is a non-sense, the actual shift depends on the sensor
type (fans need 4, other sensors need 6). Get rid of it to prevent
any confusion. Also get rid of the useless masking, the meaningful
bits are always the MSb so there's nothing to mask out after
shifting.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-10-28 20:31:47 +02:00
Jean Delvare
c1a792a6ee hwmon: (w83795) Avoid reading the same register twice
Shorten driver load time by avoiding duplicate register access during
initialization. This saves 112 ms on modprobe on my test system.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-10-28 20:31:47 +02:00
Jean Delvare
02728ffef9 hwmon: (w83795) Rework beep_enable implementation
Handle beep_enable just like all other beep bits. It doesn't need
anything special, so let's avoid redundant code. This also saves a
duplicate register read at initialization time.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-10-28 20:31:47 +02:00
Jean Delvare
54891a3c13 hwmon: (w83795) Report PECI agent Tbase values
On systems with PECI, report PECI agent Tbase temperature values.
This is informative only.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-10-28 20:31:47 +02:00
Jean Delvare
dd127f5ccd hwmon: (w83795) Properly handle negative temperatures
The temperature registers hold regular 2's complement values, no need
to add any arithmetics.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-10-28 20:31:47 +02:00
Jean Delvare
a0ce402fb0 hwmon: (w83795) Rename temperature limit attributes
Follow the standard for temperature limit attribute naming, so that
libsensors will pick the values.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-10-28 20:31:47 +02:00
Jean Delvare
01879a855f hwmon: (w83795) Fix PWM duty cycle frequency attributes
The PWM duty cycle frequenty attributes are improperly named
(fanN_div instead of pwmN_div) and contain raw values instead of
actual frequencies. Rename them and fix their contents.

Also improve the logic when the user asks for a new frequency, to
always pick the closest supported frequency. The algorithm could
certainly be optimized, but the operation is infrequent enough that
I don't think it's worth the effort.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-10-28 20:31:47 +02:00
Jean Delvare
0e256018b0 hwmon: (w83795) Add support for dynamic in0-2 limits
The W83795G can be configured to set the in0, in1 and/or in2 voltage
limits dynamically based on VID input pins. Switch the respective
sysfs attributes to read-only.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-10-28 20:31:46 +02:00
Jean Delvare
6c82b2f3fb hwmon: (w83795) Fix LSB reading of fan speeds
Misplaced parentheses caused the wrong register value to be read,
resulting in random LSB for fan speed values and limits.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-10-28 20:31:46 +02:00
Jean Delvare
71caf46fbf hwmon: (w83795) Clean up probe function
* The data structure is zalloc'd, so no need to set individual fields
  to 0 explicitly.
* Refactor the handling of pins that can be used for either
  temperature or voltage monitoring.
* Misc other clean-ups.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-10-28 20:31:46 +02:00
Jean Delvare
6f9dfd85f7 hwmon: (w83795) Fix in17-in20 gain factor
Gain bit set means 1x gain and cleared means 8x gain, not the other
way around.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-10-28 20:31:46 +02:00
Jean Delvare
80646b9586 hwmon: (w83795) Only start monitoring if needed
This saves an SMBus write if monitoring was already enabled.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-10-28 20:31:46 +02:00
Jean Delvare
86ef4d2fd5 hwmon: (w83795) Add const markers
Attribute structures can be made const. Same for the I2C address
list.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-10-28 20:31:46 +02:00
Jean Delvare
b2cc528e58 hwmon: (w83795) Only create fan[1-8]_target files when needed
Only create fan[1-8]_target files when the fan in question can be
controlled (PWM output is present.) Also name these files according
to the standard.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-10-28 20:31:46 +02:00
Jean Delvare
b5f6a90a0b hwmon: (w83795) Move PWM attributes to a dedidated array
Use a dedicated 2D array for PWM attributes. This way, PWM attributes
are handled the same way as other attributes, this is more consistent.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-10-28 20:31:46 +02:00
Jean Delvare
87df0dad3e hwmon: (w83795) Use 2D arrays for many device attributes
Use 2D arrays for in, fan, temp and dts device attributes. Using
linear arrays is too risky as we have to skip some groups depending
on the device model and configuration. Adding or removing an
attribute would let the driver build silently but then it would crash
at runtime. With 2D arrays, the consistency checking happens at build
time, which is much safer.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-10-28 20:31:45 +02:00
Jean Delvare
6f3dcde9c6 hwmon: (w83795) Merge w83795_create_files and w83795_remove_files
Functions w83795_create_files and w83795_remove_files iterate over
the same set of files, just calling a different function. Merge them
into a single function which takes the action as a parameter. This
saves code, and also ensure that file creation and deletion are in
sync.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-10-28 20:31:45 +02:00
Jean Delvare
892514a637 hwmon: (w83795) Move file creation to a separate function too
Function w83795_probe() is way too big, move file creation to a separate
function to make it more readable.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-10-28 20:31:45 +02:00
Jean Delvare
2fa09878ba hwmon: (w83795) Move files removal to a separate function
Sysfs files must be removed on device removal but also when device
registration fails. Move the code to a separate function to avoid
code redundancy.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-10-28 20:31:45 +02:00
Jean Delvare
2be381de0f hwmon: (w83795) Improve detection routine
Check for additional identification registers. Improve debugging
messages on failed detection.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-10-28 20:31:45 +02:00
Jean Delvare
b2469f422f hwmon: (w83795) Refactor bank selection
Move the bank selection code to a separate function, to avoid
duplicating it in read and write functions. Improve error reporting
on register access error.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-10-28 20:31:45 +02:00
Jean Delvare
093d1a4794 hwmon: (w83795) Drop duplicate enum
Enum chips and chip_types are redundant, get rid of the former. Fix
the detection code to properly identify the chip variant and name the
client accordingly.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-10-28 20:31:45 +02:00
Jean Delvare
315bacfdbe hwmon: (w83795) Misc cleanups
* Improve driver description.
* Drop unused macro.
* Drop unreachable code.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-10-28 20:31:45 +02:00
Wei Song
792d376b4f hwmon: New driver for the W83795G/ADG monitoring chips
There is still much work needed, but I wanted to give Wei the credit
he deserves. I've merged some of my own fixes already, to make
gcc and checkpatch happy. Individual fixes and improvements from me
will follow.

[JD: Fix build errors]
[JD: Coding style cleanups]
[JD: Get rid of forward declarations]
[JD: Drop VID support]
[JD: Drop fault output control feature]
[JD: Use lowercase for inline function names]
[JD: Use strict variants of the strtol/ul functions]
[JD: Shorten the read and write function names]

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-10-28 20:31:44 +02:00