Add at least the bare minimum of documentation for this chip.
Signed-off-by: NDarrick J. Wong <djwong@us.ibm.com>
Signed-off-by: NJean Delvare <khali@linux-fr.org>

Signed-off-by: NDarrick J. Wong <djwong@us.ibm.com>
Signed-off-by: NJean Delvare <khali@linux-fr.org>

Signed-off-by: NDarrick J. Wong <djwong@us.ibm.com>
Signed-off-by: NJean Delvare <khali@linux-fr.org>

This patch modifies the w83781d driver to use new style driver binding.
Substantial code modifications are required to deal with the new
interface, especially legacy device detection.

[JD: largely edited to make the patch smaller and to get the driver
to work again on ISA devices.]
Signed-off-by: NWolfgang Grandegger <wg@grandegger.com>
Signed-off-by: NJean Delvare <khali@linux-fr.org>

Upcoming changes to the I2C part of the w83781d driver will cause ISA
devices to no longer have a struct i2c_client at hand. So, we must
stop (ab)using it now.
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Cc: Wolfgang Grandegger <wg@grandegger.com>

Probing the ISA bus on systems without ISA bus may hang the system.
This patch makes the ISA bus related code depend on the kernel
configuration parameter CONFIG_ISA. It moves ISA bus related code
into one #ifdef CONFIG_ISA ... #endif block and adds some helper
function.
Signed-off-by: NWolfgang Grandegger <wg@grandegger.com>
Signed-off-by: NJean Delvare <khali@linux-fr.org>

This information was provided in lm-sensors ticket #2350:
http://www.lm-sensors.org/ticket/2350

This is IMHO still not enough to be able to safely implement fan
control support for the AS99127F, but this is valuable information so
I am adding it to the documentation.
Signed-off-by: NJean Delvare <khali@linux-fr.org>

The W83781D and W83782D can be accessed either on the I2C bus or the
ISA bus. We must not access the same chip through both interfaces. So
far we were relying on the user passing the correct ignore parameter
to skip the registration of the I2C interface as suggested by
sensors-detect, but this is fragile: the user may load the w83781d
driver without running sensors-detect, and the i2c bus numbers are
not stable across reboots and hardware changes.

So, better detect alias chips in the driver directly, and skip any
I2C chip which is obviously an alias of the ISA chip. This is done
by comparing the value of 26 selected registers.
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Cc: Wolfgang Grandegger <wg@grandegger.com>

We can handle the beep enable bit as any other beep mask bit for
slightly smaller code.
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Cc: Wolfgang Grandegger <wg@grandegger.com>

Signed-off-by: NJean Delvare <khali@linux-fr.org>

Add support to set target temperature and tolerance for thermal
cruise mode.
Signed-off-by: NMarc Hulsman <m.hulsman@tudelft.nl>
Acked-by: NHans de Goede <j.w.r.degoede@hhs.nl>
Signed-off-by: NJean Delvare <khali@linux-fr.org>

Add support for pwm_enable.
Signed-off-by: NMarc Hulsman <m.hulsman@tudelft.nl>
Acked-by: NHans de Goede <j.w.r.degoede@hhs.nl>
Signed-off-by: NJean Delvare <khali@linux-fr.org>

Add PWM manual control.
Signed-off-by: NMarc Hulsman <m.hulsman@tudelft.nl>
Acked-by: NHans de Goede <j.w.r.degoede@hhs.nl>
Signed-off-by: NJean Delvare <khali@linux-fr.org>

Pins fan/pwm 4-5 can be in use as GPIO. If that is the case, do not
create their sysfs-interface. 
Signed-off-by: NMarc Hulsman <m.hulsman@tudelft.nl>
Acked-by: NHans de Goede <j.w.r.degoede@hhs.nl>
Signed-off-by: NJean Delvare <khali@linux-fr.org>

Macros evaluating their arguments more than once are evil.
Signed-off-by: NJean Delvare <khali@linux-fr.org>

The it87 driver doesn't follow the standard sensor type values as
documented in Documentation/hwmon/sysfs-interface. It uses value 2 for
thermistors instead of value 4. This causes "sensors" to tell the user
that the chip is setup for a transistor while it is actually setup for
a thermistor.

Using value 4 for thermistors solves the problem. For compatibility
reasons, we still accept value 2 but emit a warning message so that
users update their configuration files.
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Acked-by: NHans de Goede <hdegoede@redhat.com>

The new-style lm78 driver implements the optional detect() callback
to cover the use cases of the legacy driver.
Signed-off-by: NJean Delvare <khali@linux-fr.org>

Upcoming changes to the I2C part of the lm78 driver will cause ISA
devices to no longer have a struct i2c_client at hand. So, we must
stop (ab)using it now.
Signed-off-by: NJean Delvare <khali@linux-fr.org>

The LM78 detection is relatively weak, and sometimes recent Winbond
chips can be misdetected as an LM78. We have had repeated reports of
this happening. We have an explicit check against this for the ISA
access, do the same for I2C access now.
Signed-off-by: NJean Delvare <khali@linux-fr.org>

The LM78 and LM79 can be accessed either on the I2C bus or the ISA
bus. We must not access the same chip through both interfaces. So far
we were relying on the user passing the correct ignore parameter to
skip the registration of the I2C interface as suggested by
sensors-detect, but this is fragile: the user may load the lm78
driver without running sensors-detect, and the i2c bus numbers are
not stable across reboots and hardware changes.

So, better detect alias chips in the driver directly, and skip any
I2C chip which is obviously an alias of the ISA chip. This is done
by comparing the value of 26 selected registers.
Signed-off-by: NJean Delvare <khali@linux-fr.org>

Only request I/O ports 0x295-0x296 instead of the full I/O address
range. This solves a conflict with PNP resources on a few motherboards.

Also request the I/O ports in two parts (4 low ports, 4 high ports)
during device detection, otherwise the PNP resource make the request
(and thus the detection) fail.

This is the exact same fix that was applied to driver w83781d in
March 2008 to address the same problem:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=2961cb22ef02850d90e7a12c28a14d74e327df8dSigned-off-by: NJean Delvare <khali@linux-fr.org>

Label names ERROR1 and ERROR3 aren't exactly explicit. Change them for
better names that indicate what we are up to.
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Acked-by: NHerbert Poetzl <herbert@13thfloor.at>

Function RANGE_TO_REG can easily be simplified. Credits go to Herbert
Poetzl for indirectly suggesting this to me. I tested that the new
implementation returns the same result as the original implementation
for all input values.
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Acked-by: NHerbert Poetzl <herbert@13thfloor.at>

The new-style lm85 driver implements the optional detect() callback
to cover the use cases of the legacy driver.
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Acked-by: NHerbert Poetzl <herbert@13thfloor.at>

The Analog Devices and SMSC devices supported by the lm85 driver do
not have the same PWM frequency table as the National Semiconductor
devices. Add support for per-device frequency tables.
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Acked-by: NHerbert Poetzl <herbert@13thfloor.at>

The LM85 and compatible chips only support 8 arbitrary PWM frequencies.
The algorithm to pick one of them based on the user input is not
optimum. Improve it to always pick the closest supported frequency.
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Acked-by: NHerbert Poetzl <herbert@13thfloor.at>

Implement the standard PWM frequency interface: pwm[1-*]_freq in
units of 1 Hz, instead of the non-standard pwm[1-*]_auto_pwm_freq
in units of 0.1 Hz. The old naming was not only non-standard, it was
also confusing, because it suggested that the frequency value only
applied in automatic fan speed mode, which isn't true.
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Acked-by: NHerbert Poetzl <herbert@13thfloor.at>

Rework the device detection to make it clearer and faster in the
general case (when a known device is found.)
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Acked-by: NHerbert Poetzl <herbert@13thfloor.at>

Simplify the IRQ handling routine of ams driver.
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>
Signed-off-by: NJohannes Berg <johannes@sipsolutions.net>
Signed-off-by: NJean Delvare <khali@linux-fr.org>

Use a separate mutex to serialize input device creation/removal,
otheriwse we deadlock if we try to remove input device while it is
being polled. Also do not take ams_info.lock when it is not needed.
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>
Signed-off-by: NJohannes Berg <johannes@sipsolutions.net>
Signed-off-by: NJean Delvare <khali@linux-fr.org>

We should not allow writes to the 'joystick' module parameters since
writing there will not trigger creation of the input device. Disable
writes since we provide alternative way of enabling input device via
AMS device's sysfs attribute.
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>
Acked-by: NJohannes Berg <johannes@sipsolutions.net>
Signed-off-by: NJean Delvare <khali@linux-fr.org>

The legacy i2c binding model is phasing out, so the ams driver needs
to be converted to a new-style i2c driver. Here is a naive approach of
this conversion. Basically it is moving the i2c device creation from
the ams driver to the i2c-powermac driver. This should work, but I
suspect we could come up with something cleaner by declaring the i2c
device as part of the platform setup. This could be done later by
someone more familiar with openfirmware-based platforms than I am
myself.

One nice thing brought by this conversion is that the ams driver
should be loaded automatically on systems where is is needed (at
least when the I2C interface to the chip is used) providing
coldplug-aware user-space environment.
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Acked-by: NJohannes Berg <johannes@sipsolutions.net>
Cc: Stelian Pop <stelian@popies.net>
Cc: Michael Hanselmann <linux-kernel@hansmi.ch>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>

The lm87 driver normally assumes that firmware configured the chip
correctly.  Since this is not always the case, alllow platform code to
set the channel register value via platform_data.  All other
configuration registers can be changed after driver initialisation.
Signed-off-by: NBen Hutchings <bhutchings@solarflare.com>
Signed-off-by: NJean Delvare <khali@linux-fr.org>

This means that if we have to start the monitor when probed, we also
stop it on removal.
Signed-off-by: NBen Hutchings <bhutchings@solarflare.com>
Signed-off-by: NJean Delvare <khali@linux-fr.org>

lm87_init_client() conditionally sets the Start bit and clears the
INT#_Clear bit in the Config 1 register.  The condition should be that
either of these bits needs changing, but currently it checks the
(self-clearing) Initialization bit instead of INT#_Clear.

Fix the condition and also ensure we never set the Initialization bit.
Signed-off-by: NBen Hutchings <bhutchings@solarflare.com>
Signed-off-by: NJean Delvare <khali@linux-fr.org>

Degrade the "Unsupported chip" message from info to debug level.
There's nothing wrong with this, so no need to bother the user.
Also make the message slightly more descriptive.
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Acked-by: NMartyn Welch <martyn.welch@gefanuc.com>

These Maxim chips are similar to MAX6657 but use unsigned temperature
values to allow for readings up to 145 degrees.
Signed-off-by: NBen Hutchings <bhutchings@solarflare.com>
Signed-off-by: NJean Delvare <khali@linux-fr.org>

The encoding of temperatures varies between chips and modes.  So do not
use "temp1" or "temp2" in the names of the conversion functions, but
specify the encoding.
Signed-off-by: NBen Hutchings <bhutchings@solarflare.com>
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Tested-by: NMartyn Welch <martyn.welch@gefanuc.com>

Support ADT7461 in extended temperature range mode, which will change
the range of readings from 0..127 to -64..191 degC.  Adjust the
register conversion functions accordingly.
Signed-off-by: NNate Case <ncase@xes-inc.com>
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Tested-by: NMartyn Welch <martyn.welch@gefanuc.com>

Use static functions instead of the TEMPx_FROM_REG* and TEMPx_TO_REG*
macros.  This will ensure type safety and eliminate any side effects
from arguments passed in since the macros referenced 'val' multiple
times.  This change should not affect functionality.
Signed-off-by: NNate Case <ncase@xes-inc.com>
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Tested-by: NMartyn Welch <martyn.welch@gefanuc.com>