mfd: Initial support for Wolfson Arizona platform and WM5102 devices

The Wolfson Arizona platform is used to provide common register
interface to a series of low power audio hub CODECs, starting with the
WM5102. Since the features of these devices work over a range of
subsystems an MFD core driver is provided to instantiate the subdevices
and arbitrate access between them.

As the new regmap wake IRQ functionality is used as part of the driver
it is incorporated as a dependency.

As the AB8500 is a subordinate MFD device to the DB8500-PRCMU,
for consistency and a better 1:1 depiction of how the hardware
is laid out, it is a good idea to register it in the same way
as we do for the other MFD child devices. In order for us to do
this successfully we have to pass AB8500's platform data when
registering the DB8500-PRCMU from platform code.

Also solves this issue:
WARNING: at fs/sysfs/dir.c:526 sysfs_add_one+0x88/0xb0()
sysfs: cannot create duplicate filename '/bus/platform/devices/ab8500-core.0'
Reported-by: NLinus Walleij <linus.walleij@linaro.org>
Suggested-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NLee Jones <lee.jones@linaro.org>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

Now this driver is using regmap API, the iolock mutex is not used and
can be removed.
Signed-off-by: NAxel Lin <axel.lin@gmail.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

Pre-regulator of 88pm8606 is mainly for support charging based on vbus,
it needs to be enabled for charging battery, and will be disabled in
some exception condition like over-temp.
Add the pre-regulator device init data and resource for mfd subdev.
Signed-off-by: NJett.Zhou <jtzhou@marvell.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

Add device-tree entry to enable external 32-kHz crystal oscillator
input.

Compile-only tested.
Signed-off-by: NJohan Hovold <jhovold@gmail.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

Add flag to platform data to enable external 32-kHz crystal oscillator
(or square wave) input.

The tps6591x can use either an internal 32-kHz RC oscillator or an
external crystal (or square wave) to generate the 32-kHz clock.

The default setting depends on the selected boot mode. In boot mode 00
the internal RC oscillator is used at power-on, but the external crystal
oscillator (or square wave) can be enabled by clearing the ck32k_ctrl
flag in the device control register.

Note that there is no way to switch from the external crystal oscillator
to the internal RC oscillator.
Signed-off-by: NJohan Hovold <jhovold@gmail.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

During conversion to regmap_irq this hunk was missing being moved
to MFD driver to put the chip into clear on read mode. Also as slave
is now set use it to determine which slave for the register call.
Signed-off-by: NGraeme Gregory <gg@slimlogic.co.uk>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

Due to a merge error the section of code passing the pdata for the
regulator driver to the mfd_add_devices via the children structure
was missing. This corrects this problem.
Signed-off-by: NGraeme Gregory <gg@slimlogic.co.uk>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

This patch add support irq domain for Maxim MAX8997 muic
instead of irq_base in platform data and max8997 driver
private data are instead. It is tested on TRATS board.

Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: NChanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: NMyungjoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: NKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

Add irq domain support for max8997 interrupts. The reverse mapping method
used is linear mapping since the sub-drivers of max8997 such as regulator
and charger drivers can use the max8997 irq_domain to get the linux irq
number for max8997 interrupts. All uses of irq_base in platform data and
max8997 driver private data are removed.
Reviwed-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: NMyungJoo Ham <myungjoo.ham@samsung.com>
Acked-by: NGrant Likely <grant.likely@secretlab.ca>
Signed-off-by: NThomas Abraham <thomas.abraham@linaro.org>
Signed-off-by: NChanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: NKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

Now the MFD API is Device Tree aware we can use it for platform
registration again, even when booting with DT enabled. To aid in
Device Node pointer allocation we provide each cell with the
associative compatible string.
Signed-off-by: NLee Jones <lee.jones@linaro.org>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

Applying a succinct description to the of_compatible variable recently
added to the mfd_cell struct. Also link to the documentation page where
more information can be found about compatible properties.
Signed-off-by: NLee Jones <lee.jones@linaro.org>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

Guard PM methods with CONFIG_PM_SLEEP and get rid of some unneeded #ifdefs.
This fixes below build warnings:

  CC      drivers/mfd/tc3589x.o
drivers/mfd/tc3589x.c:361:12: warning: 'tc3589x_suspend' defined but not used [-Wunused-function]
drivers/mfd/tc3589x.c:375:12: warning: 'tc3589x_resume' defined but not used [-Wunused-function]

SIMPLE_DEV_PM_OPS already defines constant dev_pm_ops, thus also fix
'duplicate const' sparse warning.
Signed-off-by: NAxel Lin <axel.lin@gmail.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

This fixes below build warnings:
  CC      drivers/mfd/adp5520.o
drivers/mfd/adp5520.c:324:12: warning: 'adp5520_suspend' defined but not used [-Wunused-function]
drivers/mfd/adp5520.c:333:12: warning: 'adp5520_resume' defined but not used [-Wunused-function]
Signed-off-by: NAxel Lin <axel.lin@gmail.com>
Acked-by: NMichael Hennerich <michael.hennerich@analog.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

This patch fixes conflict between commit 8ae3559
"mfd: mc13xxx workaround SPI hardware bug on i.Mx"
and commit 10c7a5d "mfd: Use devm_* APIs for mc13xxx".

commit 8ae3559 changes regmap_init_spi to regmap_init.
So now we need to use devm_regmap_init rather than devm_regmap_init_spi.
Signed-off-by: NAxel Lin <axel.lin@gmail.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

'ARM: OMAP3: USB: Fix the EHCI ULPI PHY reset issue' (1fcb57d0) fixes
an issue where the ULPI PHYs were not held in reset while initializing
the EHCI controller. However, it also changes behavior in
omap-usb-host.c omap_usbhs_init by releasing reset while the
configuration in that function was done.

This change caused a regression on BB-xM where USB would not function
if 'usb start' had been run from u-boot before booting. A change was
made to release reset a little bit earlier which fixed the issue on
BB-xM and did not cause any regressions on 3430 sdp, the board for
which the fix was originally made.

This new fix, 'USB: EHCI: OMAP: Finish ehci omap phy reset cycle
before adding hcd.', (3aa2ae74) caused a regression on OMAP5.

The original fix to hold the EHCI controller in reset during
initialization was correct, however it appears that changing
omap_usbhs_init to not hold the PHYs in reset during it's
configuration was incorrect. This patch first reverts both fixes, and
then changes ehci_hcd_omap_probe in ehci-omap.c to hold the PHYs in
reset as the original patch had done. It also is sure to incorporate
the _cansleep change that has been made in the meantime.

I've tested this on Beagleboard xM, I'd really like to get an ack from
the 3430 sdp and OMAP5 guys before getting this merged.

v3 - Brown paper bag its too early in the morning actually run
     git commit amend fix
v2 - Put cansleep gpiolib call outside of spinlock
Acked-by: NMantesh Sarashetti <mantesh@ti.com>
Tested-by: NMantesh Sarashetti <mantesh@ti.com>
Acked-by: NKeshava Munegowda <keshava_mgowda@ti.com>
Tested-by: NKeshava Munegowda <keshava_mgowda@ti.com>
Signed-off-by: NRuss Dill <Russ.Dill@gmail.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

Allocate memory and irq for device state using devm_*
helpers to simplify memory accounting.
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

Ensure that we leave the device with the pins in the expected
configuration if we leave it in reset over suspend, avoiding any
interoperation problems with other devices in the system.
Signed-off-by: NChris Rattray <crattray@opensource.wolfsonmicro.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

twl6040 needs CONFIG_IRQ_DOMAIN to compile, without this we have:
drivers/mfd/twl6040-irq.c: In function 'twl6040_irq_init':
drivers/mfd/twl6040-irq.c:164:2: error: implicit declaration of function 'irq_domain_add_legacy'
drivers/mfd/twl6040-irq.c:165:11: error: 'irq_domain_simple_ops' undeclared (first use in this function)
drivers/mfd/twl6040-irq.c:165:11: note: each undeclared identifier is reported only once for each function it appears in
Reported-by: NRandy Dunlap <rdunlap@xenotime.net>
Signed-off-by: NPeter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

We need to call max77693_irq_exit() in max77693_i2c_probe error patch and
max77693_i2c_remove.

Current code already uses devm_kzalloc() to allocate memory for max77693.
Thus we should not call kfree(max77693), otherwise we got double free.
Signed-off-by: NAxel Lin <axel.lin@gmail.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

Commit 72fb9220 ("mfd/ab5500: delete
AB5500 support") deleted all files that used ab5500-core.h. That file
apparently was simply overlooked. Delete it too.
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NPaul Bolle <pebolle@tiscali.nl>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

They're not referenced outside this file.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

MAX8925 rtc irq is transfered from mfd resources now.
Signed-off-by: NHaojian Zhuang <haojian.zhuang@gmail.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

Fixes the following sparse warnings:
drivers/mfd/max8997.c:209:4: warning: symbol 'max8997_dumpaddr_pmic' was not declared. Should it be static?
drivers/mfd/max8997.c:334:4: warning: symbol 'max8997_dumpaddr_muic' was not declared. Should it be static?
drivers/mfd/max8997.c:344:4: warning: symbol 'max8997_dumpaddr_haptic' was not declared. Should it be static?
drivers/mfd/max8997.c:426:25: warning: symbol 'max8997_pm' was not declared. Should it be static?
Signed-off-by: NSachin Kamat <sachin.kamat@linaro.org>
Acked-by: NMyungJoo Ham <myungjoo.ham@samsung.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

Instead of just printing the register value, also output some
description of the value.
Signed-off-by: NJonas Aaberg <jonas.aberg@stericsson.com>
Reviewed-by: NMattias Wallin <mattias.wallin@stericsson.com>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

Force the Modem wakeup by asserting the CaWakeReq signal before the
hostaccess_req/ack ping-pong sequence. The Awake_req signal is de-asserted
asserted at the same time than the hostaccess_req. Return error on failure
case so that the client using this can take appropiate steps.
Signed-off-by: NArun Murthy <arun.murthy@stericsson.com>
Acked-by: NLinus Walleij <linus.walleij@stericsson.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

Since none of the users now reference the cache directly we can happily
remove the custom cache code and rely on the regmap cache.

For simplicity we don't bother with the register defaults tables but
instead read the defaults from the device - regmap is capable of doing
this, unlike our old cache infrastructure. This saves a lot of code and
allows us to cache the device revision information too.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

We can just use regmap_update_bits() to achieve the same effect - it will
do the read/modify/update cycle for us.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

Use the most simple possible transformation on the existing code so keep
the table sitting around, further patches in this series will delete the
existing cache code - the main purpose of this patch is to ensure that
we always have a cache for bisection.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

Signed-off-by: NChris Rattray <crattray@opensource.wolfsonmicro.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

Hierarchically, the AB8500 is a child of the DB8500 PRCMU. So now that
Device Tree is being used and MFD core code is Device Tree aware, we
can simply register DB8500 PRCMU from Device Tree in the normal way
then allow the DB8500 PRCMU driver to register the AB8500 as a simple
MFD device at probe time.
Signed-off-by: NLee Jones <lee.jones@linaro.org>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

Now the MFD API is Device Tree aware we can use it for platform
registration again, even when booting with DT enabled. To aid in
Device Node pointer allocation we provide each cell with the
associative compatible string.
Signed-off-by: NLee Jones <lee.jones@linaro.org>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

The AB8500 is soon to have its own IRQ domain. For this to be useful
the driver needs to be initialised earlier in the boot sequence. Here
we move initialisation forward from arch_initcall to core_initcall time.

Cc: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: NLee Jones <lee.jones@linaro.org>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

Now the AB8500 has its own IRQ domain it needs to be initialised earlier
in the boot sequence. As the AB8500 relies on the DB8500 PRCMU we need to
reflect this change for the PRCMU driver too.

Cc: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: NLee Jones <lee.jones@linaro.org>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

During Device Tree enablement of the ab8500 and db8500-prcmu drivers,
a decision was made to omit registration through the MFD API and use
Device Tree directly. However, because MFD devices have a different
address space and the ab8500 and db8500 both use I2C to communicate,
this causes issues with address translation during execution of
of_platform_populate(). So the solution is to make the MFD core aware
of Device Tree and have it assign the correct node pointers instead.

To make this work the MFD core also needs to be awere of IRQ domains,
as Device Tree insists on IRQ domain compatibility. So, instead of
providing an irq-base via platform code, in the DT case we simply
look up the IRQ domain and map to the correct virtual IRQ.
Signed-off-by: NLee Jones <lee.jones@linaro.org>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

There is only one method used to communicate with the DB8500 PRCMU, via I2C.
Now this can be assumed, there is no requirement to specify the protocol in
the function name. This patch removes protocol specifics and uses a more
generic naming convention.
Signed-off-by: NLee Jones <lee.jones@linaro.org>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

As the AB8500 is an IRQ controller in its own right, here we provide
the AB8500 driver with IRQ domain support. This is required if we wish
to reference any of its IRQs from a platform's Device Tree.

Cc: Naga Radheshy <naga.radheshy@stericsson.com>
Cc: Mattias Wallin <mattias.wallin@stericsson.com>
Cc: Daniel Willerud <daniel.willerud@stericsson.com>
Signed-off-by: NLee Jones <lee.jones@linaro.org>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

This patch adds the correct compatible string for use during Device Tree
population. Without it the DB8500 PRCMU will not be probed.
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NLee Jones <lee.jones@linaro.org>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

During ab8500-core clean-up the Kconfig entry for AB8500_I2C_CORE
was left remnant. This patch simply removes it.
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NLee Jones <lee.jones@linaro.org>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

The kernel now forces IRQs to be ONESHOT if no IRQ handler is passed.
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NLee Jones <lee.jones@linaro.org>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>