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>

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>

fb: switch to "struct resource" ...

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

fb i.MX23/28: Add the reset control of LCD ...

Video controller of STM allow to control the reset bit of an external
LCD controller. When reset_lcd is set, CTRL1_RESET bit is used to
enable and disable LCD.
Handle USE_LCD_RESET as a flag in imx_fb_platformdata.

Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ARM STM/i.MX: Add possibility to choose the bit per pixel for STM video driver ...

When describing an new video interface, it is now possible to select
the bit per pixel. If nothing is chosen 16bpp is selected by default.

Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

fb i.MX23/28: rename imx_fb_videomode to imx_fb_platformdata ...

It's not a video mode, it contains video modes, so rename
the struct to what it actually is.

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

fb i.MX23/28: add platform data hook to enable backlight ...

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

video stm/mx2x: allow to pass in fb memory from platform data ...

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

video stm/mx2x: simplify memory allocation ...

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

ARM STM/i.MX: Add video driver for i.MX23/i.MX28 ...

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