mfd: da9063: don't try to register gpiochip when GPIOLIB isn't built ...

Fixes: feee4b638048 (gpio: add DA9062 MFD gpio support)
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mfd: da9063: fix watchdog ping execution ...

The watchdog resets the system if the watchdog gets pinged to fast.
Between each watchdog ping must be a pause of at least 200ms. This
commit fixes that by rejecting two fast requests.

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

mfd: da9063: fix TWDSCALE debug message ...

The TWDSCALE is the found scale + 1 as described in the datasheets
for the DA9062/3 devices. The driver logic is correct just the debug
message is wrong.

Signed-off-by: Marco Felsch <m.felsch@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>

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: 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: da9063: read out and report device id ...

just some kind of debugging atm...

Signed-off-by: Enrico Scholz <enrico.scholz@sigma-chemnitz.de>
Tested-by: Stefan Christ <s.christ@phytec.de>
Signed-off-by: Christian Hemp <c.hemp@phytec.de>

mfd: da9063: added of_device_id information ...

Signed-off-by: Enrico Scholz <enrico.scholz@sigma-chemnitz.de>
Tested-by: Stefan Christ <s.christ@phytec.de>
Signed-off-by: Christian Hemp <c.hemp@phytec.de>

mfd: da9063: add device specific init function ...

Provide some more information about the used PMIC type; later patches
will add support for DA9062 which needs a custom init function.

Signed-off-by: Enrico Scholz <enrico.scholz@sigma-chemnitz.de>
Tested-by: Stefan Christ <s.christ@phytec.de>
Signed-off-by: Christian Hemp <c.hemp@phytec.de>

mfd: da9063: use da906x_reg_update() ...

Use the previously added da906x_reg_update() function.

NOTE: patch depends on another patchset ("da9063: reset watchdog
timer"),

Signed-off-by: Enrico Scholz <enrico.scholz@sigma-chemnitz.de>
Tested-by: Stefan Christ <s.christ@phytec.de>
Signed-off-by: Christian Hemp <c.hemp@phytec.de>

mfd: da9063: added generic reg_update() function ...

Used to set or clear bits of a register.

The calculation of 'client' might look odd and unnecessary complicated.
But style prepares access to other register banks which is added in
following patches.

Signed-off-by: Enrico Scholz <enrico.scholz@sigma-chemnitz.de>
Tested-by: Stefan Christ <s.christ@phytec.de>
Signed-off-by: Christian Hemp <c.hemp@phytec.de>

mfd: da9063: reset watchdog timer ...

Setting the new timeout does not suffice for restarting the watchdog;
the self-clearing bit in CONTROL_F must be set too.

barebox does not provide a ping function in its watchdog api to restart
the watchdog timer.  Detect ping vs. set_timeout() by comparing the
actual with the previous timeout value.

Signed-off-by: Enrico Scholz <enrico.scholz@sigma-chemnitz.de>
Tested-by: Stefan Christ <s.christ@phytec.de>
Signed-off-by: Christian Hemp <c.hemp@phytec.de>

mfd: da9063: Fix compilation ...

Fixes: 1ef7cd07a3 watchdog: rename dev to hwdev

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

mfd: da9063: add da9063 watchdog and system restart driver ...

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>