syscon: Decrease driver registration priority ...

A number of devices on i.MX6 list "syscon" as second compatibility
string, among them, most importantly, is "iomuxv3" pinmux driver, which
gets probed at "postcore_initcall". Probing this driver at
"core_initcall" results in "syscon" driver usurping pinmux device and
preventing "iomuxv3" driver from loading and correctly initializing
pinmux of the system (which in turn results in a lot of sadness).

Moving this driver to be initialized at "device_initcall" time resolves
the issue.

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

string: Fix (v)asprintf prototypes ...

Our asprintf and vasprintf have different prototypes than the glibc
functions. This causes trouble when we want to share barebox code
with userspace code. Change the prototypes for (v)asprintf to match
the glibc prototypes. Since the current (v)asprintf are convenient
to use change the existing functions to b(v)asprintf.

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

mfd: mc13xxx: Switch to regmap support ...

This moves the mc13xxx driver over to regmap.

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

mfd: da9053: remove references to nonexistent cdev member ...

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mfd: da9053: add da9053 watchdog and system restart driver ...

Signed-off-by: Jan Luebbe <jlu@pengutronix.de>
Signed-off-by: Juergen Borleis <jbe@pengutronix.de>
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>

of: use 'const void *' for struct of_device_id.data ...

Since 2011 barebox' of_device_id struct uses unsigned long type for data field:

    struct of_device_id {
            char *compatible;
            unsigned long data;
    };

Almost always struct of_device_id.data field are used as pointer
and need 'unsigned long' casting.

E.g. see 'git grep -A 4 of_device_id drivers/' output:

    drivers/ata/sata-imx.c:static __maybe_unused struct of_device_id imx_sata_dt_ids[] = {
    drivers/ata/sata-imx.c- {
    drivers/ata/sata-imx.c-         .compatible = "fsl,imx6q-ahci",
    drivers/ata/sata-imx.c-         .data = (unsigned long)&data_imx6,
    drivers/ata/sata-imx.c- }, {

Here is of_device_id struct in linux kernel v4.0:

    struct of_device_id {
            char name[32];
            char type[32];
            char compatible[128];
            const void *data;
    };

Changing of_device_id.data type to 'const void *data' will increase
barebox' linux kernel compatibility and decrease number of 'unsigned
long' casts.

Part of the patch was done using the 'coccinelle' tool with the
following semantic patch:

    @rule1@
    identifier dev;
    identifier type;
    identifier func;
    @@
    func(...) {
    <...
    - dev_get_drvdata(dev, (unsigned long *)&type)
    + dev_get_drvdata(dev, (const void **)&type)
    ...>
    }
    @rule2@
    identifier dev;
    identifier type;
    identifier func;
    identifier data;
    @@
    func(...) {
    <...
    - dev_get_drvdata(dev, (unsigned long *)&type->data)
    + dev_get_drvdata(dev, (const void **)&type->data)
    ...>
    }

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

resource: Let dev_get_resource return an error pointer ...

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

resource: Let request_iomem_region return an error pointer ...

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

mfd: syscon: add device tree support ...

This patch defines a OF compatible property for the syscon driver to
allow it to be probed from device tree.

Signed-off-by: Beniamino Galvani <b.galvani@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mfd: mc34704: Add DT support ...

Add a compatible to this driver so it can be added through devicetree.

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

mfd: mc13xxx: move to coredevice_initcall ...

The PMIC is often a dependency for other devices, so make sure
it's initialized early. While at it, merge the spi/i2c registration
into a single initcall and use IS_ENABLED instead of ifdefs.

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

mfd: mc13xxx: Allow to set callback for mc13xxx ...

Some boards have to initialize the PMIC before other devices can
be initialized. This requires three levels of initcalls: one level
in which the PMIC is probed, one in which the board can call mc13xxx_get()
and the third one to initialize the PMIC dependent devices.

Allow to register a callback which is called once the PMIC is initialized.
This way mc13xxx_get() is no longer necessary and the number of required
initcalls levels is reduced to two.

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

Merge branch 'for-next/rockchip'

mfd: add act8846 driver ...

Signed-off-by: Beniamino Galvani <b.galvani@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

common: Allow for I/O mapped I/O ...

Rework the current framework so that I/O mapped I/O resources are
also possible.

Signed-off-by: Michel Stam <michel@reverze.net>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: clps711x: Remove the special name for the syscon driver ...

No reason to make SYSCON driver name unique to that processor.

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mfd: syscon: Introduce syscon_base_lookup_by_phandle() function ...

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

treewide: Add missing includes ...

A lot of files rely on include/driver.h including include/of.h (and
this including include/errno.h. include the files explicitly so we can
eventually get rid of including of.h from driver.h

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

mfd: syscon: Replace dev_info with dev_dbg ...

There is no reason to print used region each time.

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mfd: mc13xxx: Add support for MC34708 ...

This patch moves support for MC34708 PMIC into mc13xxx driver.

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mfd: mc13xxx: Separate query_revision function for each supported IC ...

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mfd: mc13xxx: Determine used bus by "bus_type" field ...

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'for-next-manual/oftree-linux-sync'

mfd: stmpe: Add devicetree probe support ...

Our driver matches stmpe-i2c and stmpe-spi. It seems the device
we really support is the stmpe1601, so use this one for matching
the devicetree compatible.

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

Merge branch 'for-next/device-driver-macros'

Introduce device_spi_driver() macro and use it for SPI drivers ...

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

I2C: Rename i2c_register_driver() for using with register_driver_macro() ...

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

SPI: Rename spi_register_driver() for using with register_driver_macro() ...

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM: clps711x: Export system-wide registers through SYSCON driver ...

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>