Commit Graph

13 Commits

Author SHA1 Message Date
Linus Walleij 2071db4848 mfd: Use AB3100 MFD core IRQ for interrupt randomness
This reintroduces the entropy sampling of the AB3100 IRQ as the
IRQF_SAMPLE_RANDOM is going out according to the feature removal
schedule. I'm trying to do this the right way then, so CC:ing some
random people for a quick review. We add entropy for interrupt
events in the AB3100 which are truly random in nature, like
external cables being connected, voltages on batteries dropping
below certain ranges, ADC triggers or overheating.

Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Cc: Robin Getz <rgetz@blackfin.uclinux.org>
Acked-by: Matt Mackall <mpm@selenic.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2010-03-07 22:17:10 +01:00
Linus Walleij 0df883df8e mfd: Convert AB3100 driver to threaded IRQ
This converts the AB3100 core MFD driver to use a threaded
interrupt handler instead of the explicit top/bottom-half
construction with a workqueue. This saves some code and make it
more similar to other modern MFD drivers.

Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2010-03-07 22:17:00 +01:00
Jean Delvare 29f02646f0 mfd: Don't abuse i2c_client.name
The name field of struct i2c_client is for i2c-core's use, it should
never be changed by the drivers themselves.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2009-12-13 19:20:40 +01:00
Jean Delvare dcffa12551 mfd: AB3100 drop unused module parameters
The I2C_CLIENT_INSMOD_1 macro is only useful for i2c drivers which
implement device detection. The ab3100 driver doesn't, so there is no
point in calling it.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Cc: Samuel Ortiz <sameo@linux.intel.com>
2009-10-04 22:53:44 +02:00
Andrew Morton 00d3803b65 drivers/mfd/ab3100-core.c: fix powerpc build error
drivers/mfd/ab3100-core.c:647: error: ab3100_init_settings causes a section type conflict

Cc: Anton Vorontsov <avorontsov@ru.mvista.com>
Cc: Samuel Ortiz <sameo@linux.intel.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-09-22 07:17:24 -07:00
Linus Walleij d619bc143e regulator: AB3100 support
This adds support for the regulators found in the AB3100
Mixed-Signal IC.

It further also defines platform data for the ST-Ericsson
U300 platform and extends the AB3100 MFD driver so that
platform/board data with regulation constraints and an init
function can be passed down all the way from the board to
the regulators.

Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2009-09-17 09:47:25 +02:00
Samuel Ortiz 8aba721b23 mfd: Fix ab3100-otp build failure
ab3100.h should include linux/workqueue.h for otp to build properly.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2009-09-17 09:47:23 +02:00
Linus Walleij 0ad651c94c mfd: AB3100 disable irq nosync
This will make the worker fire interrupt disable the AB3100 IRQ
without sync which resolves a race since the interrupt obviously
cannot wait for itself to complete while being handled.

Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2009-09-17 09:47:18 +02:00
Linus Walleij ce290b0e86 mfd: AB3100 alter default setting
This alters the default setting for AB3100_IMRB1 from 0xff to
0xbf. These registers are used for the yet unimplemented ADC
and this new setting will deactivate ADC Trigger 1.

Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2009-09-17 09:47:17 +02:00
Linus Walleij 7cdc2b98ce mfd: AB3100 propagate error
This makes ab3100_set_register_interruptible() propagate the error
code from suboperations properly so it can be handles properly.
(A special case comes from signal interruption.)

Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2009-09-17 09:47:17 +02:00
Linus Walleij 956f25a677 mfd: AB3100 accessor function cleanups
This adds the _interruptible suffix to the AB3100 accessor
functions on par with mutex_lock_interruptible() that's used
for blocking simultaneous calls to the AB3100 acessor functions.
Since these accesses are slow on a 100kHz I2C bus and may line
up waiting for the mutex, we need to handle interruption by
system shutdown or kill signals and may just as well denote that
in the function names.

Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2009-09-17 09:47:15 +02:00
Samuel Ortiz dfc3aa7221 mfd: fix ab3100 warning on x86_64
The file_operations write prototype should return a ssize_t.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2009-09-17 09:46:42 +02:00
Linus Walleij 14fa56917d mfd: add U300 AB3100 core support
This adds a core driver for the AB3100 mixed-signal circuit
found in the ST-Ericsson U300 series platforms. This driver
is a singleton proxy for all accesses to the AB3100
sub-drivers which will be merged on top of this one, RTC,
regulators, battery and system power control, vibrator,
LEDs, and an ALSA codec.

Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Reviewed-by: Mike Rapoport <mike@compulab.co.il>
Reviewed-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2009-06-17 19:41:34 +02:00