mfd: superio: add base SMSC MFD driver ...

The SMSC FDC37C93xAPM is the Super I/O chip on the Dell Latitude 7490.
This adds device detection for it and its siblings, so device drivers
can be written against it or init scripts can use its regmap interface.

Signed-off-by: Ahmad Fatoum <ahmad@a3f.at>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mfd: superio: add Fintek MFD driver ...

Super I/O chips require a password to unlock access to the I/O ports.
Add a driver that pokes the password and registers the appropriate GPIO
and Watchdog devices as well as a regmap reflecting the Super I/O chip.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mfd: add basic Super I/O chip helpers ...

Super I/O chips are ICs common to x86 that are used for interfacing
to low-bandwidth peripherals. They often contain serial ports, watchdog
timers and hardware monitoring units.

They are usually addressable via one of two I/O port pairs, either
0x2e-0x2f or 0x4e-0x4f, but they don't typically respond to reads from
their range unless a device-specific 'password' has been poked in.
After this is done, they are read and written in the same manner however.

On Linux, these devices aren't subject to any device/driver model.
Each driver for some function (e.g. watchdog or GPIO) duplicates the
device probe in the module_init and board-specific configuration
is handled via module parameters.

Lets do it a bit fancier in barebox and add a helper to register chips
and a regmap for the control and configuration registers as well as a
helper to register child devices for each function contained within the
Super I/O chip.
Board-specific configuration, e.g. which pin to use as a watchdog reset,
can then be realized using barebox device-specific parameters.

The regmap will be more of a debugging aid, however.
For ease of porting from Linux, it's expected that access to the
I/O ports won't happen via the regmap. For this reason, the new
<superio.h> header offers functions to read/write these chips' registers
as well.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

gpio: add DA9062 MFD gpio support ...

The DA9062 PMIC is a mfd device which have 5 gpios. These can be
configured to work as input/output or to have an alternate function.
This commit adds the support to configure the gpios as input or output.

Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mfd: da9063: add support to populate subdevs ...

The upstream dt-bindings abstracts the DA9063/2 PMIC MFD by multiple
of-subnodes and the linux-mfd core creates platform-devices for each
node. Due to the lack of a mfd fw we need to add the platform-devices by
our own to reuse the upstream bindings.

Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'for-next/stm32'

Merge branch 'for-next/reset-source'

mfd: add support for STPMIC1 ...

The PMIC is addressable over I2C and, besides power management,
integrates a watchdog, a user power on key handling and 64 bit of
non-volatile memory.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mfd: rave-sp: Emulate firmware/bootloader mode reporting on RDU2 ...

Add code to emulate firmware/bootloader mode reporting via
"general_status" field on RDU2. This is needed to correctly report if
RAVE SP is in bootloader of application mode during startup.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mfd: da9063: use new reset_source_set_device() ...

Make use of the just introduced reset_source_set_device() to save some
boilerplate.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mfd: da9053: use new reset_source_set_device() ...

Make use of the just introduced reset_source_set_device() to save some
boilerplate.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mfd: syscon: add syscon_regmap_lookup_by_phandle() ...

This function is handy when syscon is passed as phandle to device_node
property.

Signed-off-by: Marcin Niestroj <m.niestroj@grinn-global.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

treewide: Add missing includes ...

Many files in the tree implement functions, but do not include the
header files which provide the prototypes for these functions. This
means conflicting prototypes remain undetected. Add the missing
includes.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

regmap: Implement syscon_regmap_lookup_by_compatible() ...

Implement syscon_regmap_lookup_by_compatible() to simplify porting kernel code.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Tested-by: Ladislav Michl <ladis@linux-mips.org>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

devfs: Drop dev_lseek_default() ...

Only the following cdevs do not declare an .lseek() operation:

  - Console devices in common/console.c
  - Firmware framework in common/firmware.c
  - JTAG driver in drivers/misc/jtag.c
  - UBI in drivers/mtd/ubi/barebox.c

Of those four, first two are marked DEVFS_IS_CHARACTER_DEV and
implement only .write() operation and the last two don't implement
anything but .ioctl(). While there's probably no meaningful way to use
lseek() against any of those devices, there doesn't seem to be any
harm in allowing it either.

Change devfs_lseek() to ignore absense of .lseek() callback and drop
dev_lseek_default() and all references to it in the codebase.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'for-next/misc'

mfd: syscon: Switch to using %pa to print memory addresses ...

Switch to using %pa to print memory addresses in order to be able to
support both 64 and 32 bit builds.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mfd: rave-sp: Add parameters to query IP address/netmask ...

Unlike LCD type information, IP address as well as netmaks are not
stored in an easily usable format in RAVE SP EEPROM. In order to obtain
them we need to issue a special command to RAVE SP. For that purpose add
device "sp" and expose that data as a device parameters (sp.ipaddr and
sp.netmask, correspondingly)

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mfd: rave-sp: Make use of wait_on_timeout() ...

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mfd: da9063: fix wrong NULL pointer test ...

checking for priv == NULL and using in this case priv->dev
makes no sense.

Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

i2c: introduce device_i2c_driver() macro ...

Add macro and dependency to avoid boilerplate code. Since now simple
i2c drivers only have to include the i2c.h header and call the
device_i2c_driver() macro to register a i2c device driver.

Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mfd: rave-sp: Emulate CMD_GET_STATUS on device that don't support it ...

CMD_GET_STATUS is not supported by some devices implementing
RDU2-compatible ICD as well as "legacy" devices. To account for that
fact, add code that obtains the same information (app/bootloader FW
version) using several different commands.

This is a backport of Linux kernel patch [1]

[1] https://lore.kernel.org/lkml/20180707024108.32373-5-andrew.smirnov@gmail.com/T/#md1b7130a992235d57cabadc8e59fc74ee3b21d9e

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mfd: rave-sp: Add legacy watchdog ping command translation ...

This is needed to make rave-sp-wdt driver to properly ping the
watchdog on "legacy" firmware.

This is a backport of Linux kernel patch [1]

[1] https://lore.kernel.org/lkml/20180707024108.32373-5-andrew.smirnov@gmail.com/T/#m767615239f8aa681a2dc0ccfe1c877e4cbb0edf6

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mfd: rave-sp: Add mapping for legacy EEPROM command ...

This is needed to make rave-sp-eeprom driver work on "legacy"
firmware.

This is a backport of Linux kernel patch [1]

[1] https://lore.kernel.org/lkml/20180707024108.32373-5-andrew.smirnov@gmail.com/T/#mae2272763ae092b5b11ab128f5c22039d55557cb

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mfd: rave-sp: Fix incorrectly specified checksum type ...

RAVE SP firmware covered by "legacy" variant uses 16-bit CCITT
checksum algorithm. Change the code to correctly reflect that.

This is a backport of Linux kernel patch [1]

[1] https://lore.kernel.org/lkml/20180707024108.32373-5-andrew.smirnov@gmail.com/T/#m6251b0a4869dd303c21910fc99f2ce127cf8aae0

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mfd: rave-sp: Remove unused defines ...

Remove unusded defines that are a leftover from earlier iterations of
the driver.

This is a backport of Linux kernel patch [1]

[1] https://lore.kernel.org/lkml/20180707024108.32373-5-andrew.smirnov@gmail.com/T/#m02a75392c729828f822e2cd52f86e541b1649a27

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

wdt: da9053: fix missed dev->hwdev conversion ...

Fixes: 1ef7cd07a304 (watchdog: rename dev to hwdev)
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'for-next/misc'

Merge branch 'for-next/mfd-dialog'

Merge branch 'for-next/aiodev'