driver: replace dev_request_mem_region with dev_request_mem_resource ...

dev_request_mem_region doesn't work properly one some SoCs on which
PTR_ERR() values clash with valid return values from dev_request_mem_region.
Replace them with dev_request_mem_resource where possible.

This patch has been generated with the following semantic patch:

// <smpl>
@@
expression d;
expression n;
expression io;
identifier func;
@@
func(...) {
+struct resource *iores;
<+...
-io = dev_request_mem_region(d, n);
-if (IS_ERR(io)) {
+iores = dev_request_mem_resource(d, n);
+if (IS_ERR(iores)) {
...
-	return PTR_ERR(io);
-}
+	return PTR_ERR(iores);
+}
+io = IOMEM(iores->start);
...+>
}

@@
expression d;
expression n;
expression io;
identifier func;
@@
func(...) {
+struct resource *iores;
<+...
-io = dev_request_mem_region(d, n);
-if (IS_ERR(io)) {
+iores = dev_request_mem_resource(d, n);
+if (IS_ERR(iores))
-	return PTR_ERR(io);
-}
+	return PTR_ERR(iores);
+io = IOMEM(iores->start);
...+>
}

@@
expression d;
expression n;
expression io;
identifier func;
@@
func(...) {
+struct resource *iores;
<+...
-io = dev_request_mem_region(d, n);
-if (IS_ERR(io)) {
-	ret = PTR_ERR(io);
+iores = dev_request_mem_resource(d, n);
+if (IS_ERR(iores)) {
+	ret = PTR_ERR(iores);
...
}
+io = IOMEM(iores->start);
...+>
}

@@
expression d;
expression n;
expression io;
identifier func;
@@
func(...) {
+struct resource *iores;
<+...
-io = dev_request_mem_region(d, n);
+iores = dev_request_mem_resource(d, n);
+if (IS_ERR(iores))
+	return PTR_ERR(iores);
+io = IOMEM(iores->start);
...+>
}

@@
identifier func;
@@
func(...) {
<+...
struct resource *iores;
-struct resource *iores;
...+>
}
// </smpl>

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>

video: imx: Add a name to perclk ...

perclk should be named 'per' to make sure we get the correct clock.

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>

i.MX21/27: don't enable lcd bus clocks too early ...

On the MX27 based board phycard-i.MX27 the display won't properly
come up.
Before removing imx-regs.h and the code that sets the register
in the i.MX video driver, the PCCR registers were set _after_
the screen start (LSSAR) was set.
This restores that old behaviour and makes the display come up
properly again.
I did not have a chance to test this on any other i.MX27 or i.MX21
hardware though I assume that the "old" order is required there
too.

Signed-off-by: Daniel Mierswa <d.mierswa@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

i.MX21: Add periph. clock register name macros ...

Also put those names solely in the .c file as it's done with
the i.MX27 code.

Signed-off-by: Daniel Mierswa <d.mierswa@phytec.de>
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.MX21: Add lcdc per gate ...

This gate is used to enable/disable the lcd controller, hence we
need a gate for it.

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

ARM i.MX21: Enable all needed clocks during startup ...

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

ARM i.MX21: Fix CSPI parent clock ...

It's perclk2, not perclk3

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

ARM i.MX: Add devicetree support to the ccm drivers ...

This adds the compatible strings to the CCM drivers.

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

Merge branch 'for-next/imx-clk'

ARM i.MX21: Switch to common clk ...

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