ARM: imx: clocksource: add new DT compatible ...

The i.MX6 DL/S DT has been changed to use more specific compatibles as
GPTv2 has a different programming model for modes used in Linux. This
difference doesn't matter for Barebox, but the old mx31 compatible has
been dropped from the DT, so we need to match on the one still present.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@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_request_mem_region return an error pointer ...

For all users fix or add the error check.

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

ARM: i.MX clocksource: return successful for multiple instances ...

With multiple instances we returned -EBUSY which will provoke a
log message. Return successful instead since the i.MX27 has multiple
GPTs in the devicetree.

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>

ARM: i.MX: Make timer available earlier ...

This moves the CCM drivers to core_initcall since this has no dependencies.
This way we can be sure that the clock for the clocksource is available in
at postcore_initcall time.

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

ARM i.MX: get rid of imx-regs.h ...

- remove now unused __REG definitions
- include individual SoC register files instead of imx-regs.h
- move IMX_GPIO_NR to generic.h
- finally remove imx-regs.h

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

Merge branch 'for-next/clk' into for-next/imx ...

Conflicts:
	drivers/net/fec_imx.c

ARM i.MX: Enable clocks in common place ...

On i.MX we enable all necessary clocks during startup of the clock
controller driver, so we do not need the register hacking in the drivers
anymore.

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

ARM i.MX/watchdog: Make i.MX watchdog driver the reset source on i.MX ...

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

Merge branch 'for-next/fixes'

Merge branch 'for-next/imx-clk'

ARM i.MX clocksource: fix timer source selection ...

- The i.MX1 timer does not have IPG clock as source, so rename
  the define accordingly
- for the i.MX31 timer we want to use the per clock, not the ipg
  clock.

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

ARM i.MX: Remove old clock support ...

The old clock support is now unused. Remove it. The former i.MX clko
command is superseeded by generic clock manipulation commands.

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

ARM i.MX: Switch clocksource to clk_get ...

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

switch all platform_bus device/driver registering to platform_driver/device_register ...

now register_driver and register_device are for bus only usage.

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

Merge branch 'for-next/remove-fsf-address' ...

Conflicts:
	drivers/net/miidev.c
	include/miidev.h

ARM i.MX: Add devicetree support for clocksource driver ...

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

ARM i.MX: implement clocksource as driver ...

To get rid of the register definitions in the SoC header files.
platform_device_id is used to distinguish between gpt types.

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

Treewide: remove address of the Free Software Foundation ...

The FSF address has changed in the past. Instead of updating it
each time the address changes, just drop it completely treewide.

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

ARM i.MX clocksource: put registers in iomem space ...

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

introduce io.h ...

To allow for some generic io accessors introduce io.h and use
this instead of asm/io.h throughout the tree.

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

clocksource: switch mask to CLOCKSOURCE_MASK ...

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

reset_cpu: unify declaration ...

include/common.h declares this as "unsigned long addr", so we unify it.
This also silences a doxygen warning.

Signed-off-by: Robert Schwebel <r.schwebel@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

i.MX remove wdog registers from header files ...

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

imx clocksource: sparse fixes ...

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

imx/clocksource: enable GPT1 before using it on CPUIMX25 ...

Signed-off-by: Eric Bénard <eric@eukrea.com>

i.MX clocksource: Use readl/writel instead of pointer deref ...

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

make reset_cpu a __noreturn function ...

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

[ARM] Move include/asm-arm/arch-* to arch/arm/*/include/mach ...

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>