Add MFD core driver support for a RTC component

- MFD core adds the RTC resources da9062_rtc_resources[] for the RTC
  alarm and tick timer IRQ
- An appropriate mfd_cell has been added into da9062_devs[] to support
  a component .name = "da9062-rtc" and .of_compatible  = "dlg,da9062-rtc"
Signed-off-by: NSteve Twiss <stwiss.opensource@diasemi.com>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

Explicitly set the regmap endianness instead of relying on
the default being correct.
Signed-off-by: NRichard Fitzgerald <rf@opensource.wolfsonmicro.com>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

add the description about dvs1, dvs2, and add the example.
Signed-off-by: NChris Zhong <zyw@rock-chips.com>
Reviewed-by: NDoug Anderson <dianders@chromium.org>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

Implement irq_chip->irq_get_irqchip_state to make it possible for PMIC
block drivers to access the IRQ real time status bits. The status bits
are used for various kinds of input signals, e.g. GPIO.
Signed-off-by: NBjorn Andersson <bjorn.andersson@sonymobile.com>
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

Some HLCDC registers cannot be written until the hardware has finished
applying the previous configuration request. If they are written while
an action is still in progress, the new configuration might be silently
ignored, resulting in unpredictable behavior.

Hide the config synchronization stuff in a regmap implementation and use
this implementation instead of the generic mmio one.
Signed-off-by: NBoris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: NNicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

I added support for the max77802 drivers and have been maintaining them.
So add an entry for these drivers to make tools like get_maintainer.pl
to work and make people submitting patches add me to the CC list.
Signed-off-by: NJavier Martinez Canillas <javier@osg.samsung.com>
Acked-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

The Device Tree binding documentation for the Maxim max77686 regulators
has been moved from the Multi-Function Device DT binding section to its
own Documentation/devicetree/bindings/regulator/max77686.txt file.

Use a wilcard so both the mfd and regulator DT bindings are resolved.
Signed-off-by: NJavier Martinez Canillas <javier@osg.samsung.com>
Reviewed-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

Fix a missing DVC_RDY interrupt mask in struct regmap_irq definition.

The original submission of this driver did not contain all interrupt
masking definitions in the struct regmap_irq contained in the file
da9063-irq.c

The solution is to add a DA9063_IRQ_DVC_RDY entry to enum da9063_irqs
list and to add the corresponding values to compensate for the missing
mask bit in the static const struct regmap_irq da9063_irqs[] table.
Signed-off-by: NSteve Twiss <stwiss.opensource@diasemi.com>
Signed-off-by: NAdam Ward <adam.ward.opensource@diasemi.com>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

The axp152 is a stripped down version of the axp202 pmic with the battery
charging function removed as it is intended for top-set boxes.
Signed-off-by: NMichal Suchanek <hramrach@gmail.com>
Signed-off-by: NHans de Goede <hdegoede@redhat.com>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

This patch adds the DMI system ID of the Kontron COMe-bBL6 and COME-cBW6
boards to the Kontron PLD driver. The list of supported products in the
module description is also updated.
Signed-off-by: NMichael Brunner <michael.brunner@kontron.com>
Acked-by: NChristian Rauch <christian.rauch@kontron.com>
Reviewed-by: NGuenter Roeck <linux@roeck-us.net>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

Add devicetree binding documentation for the AXP152 PMIC, this is a
stripped down version of the AXP202 PMIC with the battery charging
function removed.
Signed-off-by: NMichal Suchanek <hramrach@gmail.com>
Signed-off-by: NHans de Goede <hdegoede@redhat.com>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

Qualcomm Debug Subsystem clock is used by CoreSight components.
Add required definitions for it. qcom_rpm_resource::status_id is
not used by driver, so just mark it as ~0.
Signed-off-by: NIvan T. Ivanov <ivan.ivanov@linaro.org>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

i2c_driver does not need to set an owner because i2c_register_driver()
will set it.
Signed-off-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

These reg_default tables are not modified after initialized, so make them
const.
Signed-off-by: NAxel Lin <axel.lin@ingics.com>
Acked-by: NCharles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

The regmap register definitions have been a source of many small fixes
as issues are discovered.  As such I made a small automated tool to
check these definitions. This patch fixes the issues (mostly harmless)
located by that tool, the issues fall into three catagories:

1) Volatile registers that have a default in the defaults table (default
has been removed from the table since it is redundant)
2) Registers that are marked as volatile but unreadable (register has
been removed from the volatile list since it is obviously not being
used)
3) Registers that arn't readable but have an entry in the defaults
table (again removed since it is redundant)
4) Readable non-volatile registers that are missing a default, these are
dangerous as they won't get synced during a cache sync. Fortunately,
most of them seem to be registers that shouldn't be there (for example
wm5102 had readable registers for DRC2 and ISRC3 which is doesn't have)

Hopefully another tool will be produced to check the actual default
values themselves but that is outside the scope of this patch.
Signed-off-by: NCharles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

Add device Tree Bindings for the DA9062 driver
Signed-off-by: NSteve Twiss <stwiss.opensource@diasemi.com>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

Add MFD core driver support for DA9062
Signed-off-by: NSteve Twiss <stwiss.opensource@diasemi.com>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

 o Making pdata NULL check to (!pdata) as coding standard
	and all other checks in file.
 o Removing redundant check of pdata, because we already
	check for pdata, and also derefernced before this check.
Signed-off-by: NManinder Singh <maninder1.s@samsung.com>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

The latest valid register is TPS6586X_VERSIONCRC.
Signed-off-by: NAxel Lin <axel.lin@ingics.com>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

Signed-off-by: NRichard Fitzgerald <rf@opensource.wolfsonmicro.com>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

Instead of hard coding the shift for bit definition, use
BIT() macro.
Signed-off-by: NVaibhav Hiremath <vaibhav.hiremath@linaro.org>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

The ChromeOS EC SPI transport driver has a dependency on OF because it
uses some OF helpers from the <linux/of.h> header. But there isn't a
need for an explicit dependency since the header has stub functions if
CONFIG_OF is not defined.

Also, MFD_CROS_EC_SPI already depends on MFD_CROS_EC which in turn has
a dependency on OF so in practice can't be selected without CONFIG_OF.
Signed-off-by: NJavier Martinez Canillas <javier.martinez@collabora.co.uk>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

Device tree and ACPI primarily deal with unsigned ints, many of the
pdata members in the Arizona driver are signed ints but are only ever
assigned positive values. Changing these pdata fields to unsigned ints
avoids us having to choose between overly verbose code and Sparse
warnings.
Signed-off-by: NCharles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

The function arizona_irq_thread (the threaded handler for the arizona
IRQs) calls pm_runtime_get_sync at the start to ensure that the chip is
active as we handle the IRQ. If the chip is part way through a runtime
suspend when an IRQ arrives the PM core will wait for the suspend to
complete, before resuming. However, since commit 4f0216409f7c
("mfd: arizona: Add better support for system suspend") the runtime
suspend function may call disable_irq, if the chip is going to fully
power off, which will try to wait for any outstanding IRQs to complete.
This results in deadlock as the IRQ thread is waiting for the PM
operation to complete and the PM thread is waiting for the IRQ to
complete.

To avoid this situation we use disable_irq_nosync, which allows the
suspending thread to finish the suspend without waiting for the IRQ to
complete. This is safe because if an IRQ is being processed it can only
be blocked at the pm_runtime_get_sync at the start of the handler
otherwise it wouldn't be possible to suspend.
Signed-off-by: NCharles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

Constify the ACPI device ID array, it doesn't need to be writable at
runtime.
Signed-off-by: NMathias Krause <minipli@googlemail.com>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

Merge branches 'ib-mfd-base-acpi-dma-4.3', 'ib-mfd-clocksource-rtc-watchdog-4.3' and 'ib-mfd-i2c-x86-watchdog-4.3' into ibs-for-mfd-merged

The revision of the watchdog hardware in Sunrisepoint necessitates a new
"version" inside the TCO watchdog driver because some of the register
layouts have changed.

Also update the Kconfig entry to select both the LPC and SMBus drivers
since the TCO device is on the SMBus in Sunrisepoint.
Signed-off-by: NMatt Fleming <matt.fleming@intel.com>
Reviewed-by: NGuenter Roeck <linux@roeck-us.net>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

Starting from Intel Sunrisepoint (Skylake PCH) the iTCO watchdog resources
have been moved to reside under the i801 SMBus host controller whereas
previously they were under the LPC device.

In order to support the iTCO watchdog on newer PCHs we need to create the
platform device here in the SMBus driver and pass all known resources using
platform data.
Signed-off-by: NMika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: NMatt Fleming <matt.fleming@intel.com>
Reviewed-by: NGuenter Roeck <linux@roeck-us.net>
Acked-by: NWolfram Sang <wsa@the-dreams.de>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

Intel Sunrisepoint (Skylake PCH) has the iTCO watchdog accessible across
the SMBus, unlike previous generations of PCH/ICH where it was on the
LPC bus. Because it's on the SMBus, it doesn't make sense to pass around
a 'struct lpc_ich_info', and leaking the type of bus into the iTCO
watchdog driver is kind of backwards anyway.

This change introduces a new 'struct itco_wdt_platform_data' for use
inside the iTCO watchdog driver and by the upcoming Intel Sunrisepoint
code, which neatly avoids having to include lpc_ich headers in the i801
i2c driver.

This change is overdue because lpc_ich_info has already found its way
into other TCO watchdog users, notably the intel_pmc_ipc driver where
the watchdog actually isn't on the LPC bus as far as I can see.

A simple translation layer is provided for converting from the existing
'struct lpc_ich_info' inside the lpc_ich mfd driver.
Signed-off-by: NMatt Fleming <matt.fleming@intel.com>
Acked-by: Darren Hart <dvhart@linux.intel.com> [drivers/x86 refactoring]
Reviewed-by: NGuenter Roeck <linux@roeck-us.net>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

The new coming Intel platforms such as Skylake will contain Sunrisepoint PCH.
The main difference to the previous platforms is that the LPSS devices are
compound devices where usually main (SPI, HSUART, or I2C) and DMA IPs are
present.

This patch brings the driver for such devices found on Sunrisepoint PCH.
Signed-off-by: NMika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

Intel integrated DMA (iDMA) 64-bit is a specific IP that is used as a part of
LPSS devices such as HSUART or SPI. The iDMA IP is attached for private
usage on each host controller independently.

While it has similarities with Synopsys DesignWare DMA, the following
distinctions doesn't allow to use the existing driver:
- 64-bit mode with corresponding changes in Hardware Linked List data structure
- many slight differences in the channel registers

Moreover this driver is based on the DMA virtual channels framework that helps
to make the driver cleaner and easy to understand.
Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: NVinod Koul <vinod.koul@intel.com>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

The newly introduced device_for_each_child_reverse() would be used when MFD
core removes the device.

After this patch applied the devices will be removed in a reversed order. This
behaviour is useful when devices have implicit dependency on order, i.e.
consider MFD device with serial bus controller, such as SPI, and DMA IP that is
attached to serial bus controller: before remove the DMA driver we have to be
ensured that no DMA transfers is ongoing and the requested channel are unused.
Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

The new function device_for_each_child_reverse() is helpful to traverse the
registered devices in a reversed order, e.g. in the case when an operation on
each device should be done first on the last added device, then on one before
last and so on.
Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

klist_prev() gets the previous element in the list. It is useful to traverse
through the list in reverse order, for example, to provide LIFO (last in first
out) variant of access.
Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

If the parent is still suspended when driver probe is
attempted, the result may be failure.

For example, if the parent is a PCI MFD device that has been
suspended when we try to probe our device, any register
reads will return 0xffffffff.

To fix the problem, making sure the parent is always awake
before attempting driver probe.
Signed-off-by: NHeikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

Some devices, like MFD subdevices, share a single ACPI companion device so
that they are able to access their resources and children. However,
currently all these subdevices are attached to the ACPI power domain and
this might cause that the power methods for the companion device get called
more than once.

In order to solve this we attach the ACPI power domain only to the first
physical device that is bound to the ACPI companion device. In case of MFD
devices, this is the parent MFD device itself.
Acked-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: NMika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

Typically when a device is created the bus core it belongs to (for example
PCI) does not know if the device supports things like latency tolerance.
This is left to the driver that binds to the device in question. However,
at that time the device has already been created and there is no way to set
its dev->power.set_latency_tolerance anymore.

So follow what has been done for other PM QoS attributes as well and allow
drivers to expose and hide latency tolerance from userspace, if the device
supports it.
Acked-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: NMika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

Signed-off-by: NLee Jones <lee.jones@linaro.org>

Signed-off-by: NLee Jones <lee.jones@linaro.org>

Initial submission adding support for this IP only included Watchdog and
the Real-Time Clock.  Now the third (and final) device is enabled this
trivial patch is required to update the comment in the RTC driver to
encompass Clocksource.
Acked-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: NLee Jones <lee.jones@linaro.org>