Allow a gpio-fan to be defined in devicetree, see binding documentation
for details.
Signed-off-by: NJamie Lentin <jm@lentin.co.uk>
Acked-by: NAndrew Lunn <andrew@lunn.ch>
Acked-by: NGuenter Roeck <linux@roeck-us.net>
Signed-off-by: NJason Cooper <jason@lakedaemon.net>

Make the gpio-fan driver define its PM callbacks through
a struct dev_pm_ops object rather than by using legacy PM hooks
in struct platform_driver.
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>
[linux@roeck-us.net: CONFIG_PM->CONFIG_PM_SLEEP, and remove unnecessary ()]
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>

Convert to use devm_ functions to reduce code size and simplify the code.

Cc: Simon Guinot <sguinot@lacie.com>
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>
Acked-by: NSimon Guinot <sguinot@lacie.com>

replaced strict_strtol with kstrtol and
replaced strict_strtuol with kstrtuol

This satisfies checkpatch -f
Compile tested only: no warnings or errors given
Signed-off-by: NFrans Meulenbroeks <fransmeulenbroeks@gmail.com>
Signed-off-by: NGuenter Roeck <guenter.roeck@ericsson.com>

This patch converts the drivers in drivers/hwmon/* to use the
module_platform_driver() macro which makes the code smaller and a bit
simpler.

Cc: Donggeun Kim <dg77.kim@samsung.com>
Cc: Simon Guinot <sguinot@lacie.com>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: MyungJoo Ham <myungjoo.ham@samsung.com>
Cc: Ben Dooks <ben@simtec.co.uk>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: J Keerthy <j-keerthy@ti.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NAxel Lin <axel.lin@gmail.com>
Acked-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NGuenter Roeck <guenter.roeck@ericsson.com>

Scripted with coccinelle.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>

In current implementation, the sysfs entries is not removed before return -ENODEV.

Creating the sysfs attribute should be the last thing done by the function,
after all the rest has been successful.
Otherwise there is a small window during which user-space can access the attribute
but the driver isn't ready to deal with the requests.

Fix it by moving sysfs_create_group to be the last thing done by the function.
Signed-off-by: NAxel Lin <axel.lin@gmail.com>
Acked-by: NSimon Guinot <sguinot@lacie.com>
Signed-off-by: NGuenter Roeck <guenter.roeck@ericsson.com>

This patch adds hwmon support for fans connected to GPIO lines.

Platform specific information such as GPIO pinout and speed conversion array
(rpm from/to GPIO value) are passed to the driver via platform_data.
Signed-off-by: NSimon Guinot <sguinot@lacie.com>
Signed-off-by: NGuenter Roeck <guenter.roeck@ericsson.com>