litmus-rt.git/include/linux/mfd/wm831x, branch linux-tip

mfd: Factor out WM831x I2C I/O from the core driver

2010-10-28T22:30:24+00:00

In preparation for the addition of SPI support for the WM831x move the I2C
specific code into a separate file with a separate Kconfig option so the
I2C support can be excluded from the build.

Also update the 1133-EV1 PMIC module support for SMDK6410 to use the new
symbol.

Signed-off-by: Mark Brown 
Signed-off-by: Samuel Ortiz

mfd: Ensure WM831x charger interrupts are acknowledged when suspending

2010-05-27T23:37:39+00:00

The charger interrupts on the WM831x are unconditionally a wake source
for the system. If the power driver is not able to monitor them (for
example, due to the IRQ line not having been wired up on the system)
then any charger interrupt will prevent the system suspending for any
meaningful amount of time since nothing will ack them.

Avoid this issue by manually acknowledging these interrupts when we
suspend the WM831x core device if they are masked. If software is
actually using the interrupts then they will be unmasked and this
change will have no effect.

Signed-off-by: Mark Brown 
Signed-off-by: Samuel Ortiz

mfd: Use completion interrupt for WM831x AUXADC

2010-03-07T21:17:34+00:00

Use the completion interrupt generated by the device rather than
polling for conversions to complete. As a backup we still check
the status of the AUXADC if we don't get a completion, mostly for
systems that don't have the WM831x interrupt infrastructure hooked
up.

Also reduce the timeout for completion of conversions to 5ms from
the previous 10ms, the lower timeout should be sufficient.

Signed-off-by: Mark Brown 
Signed-off-by: Samuel Ortiz

mfd: Add WM831x revision B support

2010-03-07T21:17:29+00:00

Revision B of the WM831x devices changes the sense of the tristate
bit for GPIO configuration, inverting it to become an enable instead.
Take account of this in the gpiolib driver.

A current sink regulation status bit has also been added in revision B,
add a flag indicating if it's present but don't use it yet.

This revision also adds an interrupt on key up for the ON pin event
which the existing code is able to take advantage of.

Signed-off-by: Mark Brown 
Signed-off-by: Samuel Ortiz

regulator: Implement WM831x BuckWise DC-DC convertor DVS support

2009-12-17T10:27:22+00:00

The BuckWise DC-DC convertors in WM831x devices support switching to
a second output voltage using the logic level on one of the device
pins. This is intended to allow rapid voltage switching for uses like
cpufreq, replacing the I2C or SPI write used to configure the voltage
of the regulator with a much faster GPIO status change.

This is implemented by keeping the DVS voltage configured as the
maximum voltage permitted for the regulator. If a request is made
for the maximum voltage then the GPIO is used to switch to the DVS
voltage, otherwise the normal ON voltage is updated and used. This
follows the idiom used by most cpufreq drivers, which drop the
minimum voltage as the core frequency is dropped but use a constant
maximum - raising the voltage should normally be fast, but lowering
it may be slower.

Configuration of the DVS MFP on the device should be done externally,
for example via OTP.

Support is present in the hardware for monitoring the status of the
transition using a second GPIO. This is not currently implemented
but platform data is provided for it - the driver currently assumes
that the device will be configured to transition immediately - but
platform data is provided to reduce merge issues once it is.

Signed-off-by: Mark Brown 
Acked-by: Samuel Ortiz 
Signed-off-by: Liam Girdwood

mfd: Move WM831x to generic IRQ

2009-12-13T18:21:41+00:00

Replace the wm831x-local IRQ infrastructure with genirq, allowing access
to the diagnostic infrastructure of genirq and allowing us to implement
interrupt support for the GPIOs.  The switchover is done within the
wm831x specific IRQ API, further patches will convert the individual
drivers to use genirq directly.

Signed-off-by: Mark Brown 
Signed-off-by: Samuel Ortiz

mfd: Add support for WM8320 PMICs

2009-12-13T18:20:44+00:00

The WM8320 is an integrated power management subsystem providing
voltage regulators, RTC, watchdog and other functionality. The
WM8320 is derived from the WM831x and therefore shares most of
the driver code with the WM831x.

Signed-off-by: Mark Brown 
Signed-off-by: Samuel Ortiz

gpiolib: Make WM831x GPIO count dynamic

2009-12-13T18:20:43+00:00

This supports future devices with fewer GPIOs.

Signed-off-by: Mark Brown 
Signed-off-by: Samuel Ortiz

mfd: Correct WM831X_MAX_ISEL_VALUE

2009-12-01T10:24:19+00:00

There was confusion between the array size and the highest ISEL
value possible.

Reported-by: Dan Carpenter 
Signed-off-by: Mark Brown 
Signed-off-by: Samuel Ortiz

Merge branch 'for-linus' of git://git.o-hand.com/linux-rpurdie-leds

2009-09-26T17:50:47+00:00

* 'for-linus' of git://git.o-hand.com/linux-rpurdie-leds:
  leds: move leds-clevo-mail's probe function to .devinit.text
  leds: Fix indentation in LEDS_LP3944 Kconfig entry
  leds: Fix LED names 
  leds: Fix leds-pca9532 whitespace issues
  leds: fix coding style in worker thread code for ledtrig-gpio.
  leds: gpio-leds: fix typographics fault
  leds: Add WM831x status LED driver