Add DT OPP table for OMAP34xx/35xx family of devices. This data is
decoded by OF with of_init_opp_table() helper function.

OPP data here is based on existing opp3xxx_data.c

Since the omap36xx OPP tables would be different from OMAP34xx/35xx,
introduce an new omap34xx.dtsi for 34xx/35xx specific entries and use
existing omap3.dtsi as the common dtsi file for all OMAP3 platforms.

This is in preparation to use generic cpufreq-cpu0 driver for device
tree enabled boot. Legacy non device tree enabled boot continues to
use omap-cpufreq.c and opp3xxx_data.c.
Signed-off-by: NNishanth Menon <nm@ti.com>
Cc: Kevin Hilman <khilman@deeprootsystems.com>
Cc: Jon Hunter <jon-hunter@ti.com>
Cc: Santosh Shilimkar <santosh.shilimkar@ti.com>
Cc: Shawn Guo <shawn.guo@linaro.org>
Cc: Keerthy <j-keerthy@ti.com>
Signed-off-by: NBenoit Cousson <benoit.cousson@linaro.org>

Add usb otg data node in omap4/omap3 device tree file. Also update
the node with board specific setting in omapx-<board>.dts file.
The dt data specifies among others the interface type (ULPI or UTMI),
mode which is mostly OTG, power that specifies the amount of power
this can supply when in host mode.

The information about usb otg node is available @
Documentation/devicetree/bindings/usb/omap-usb.txt
Signed-off-by: NKishon Vijay Abraham I <kishon@ti.com>
Acked-by: NFelipe Balbi <balbi@ti.com>
Signed-off-by: NBenoit Cousson <benoit.cousson@linaro.org>

Add the needed sections to enable audio support on Overo.
Signed-off-by: NFlorian Vaussard <florian.vaussard@epfl.ch>
Signed-off-by: NBenoit Cousson <benoit.cousson@linaro.org>

Convert the on-board LED connected to the TWL4030 (LEDB) to use
pwm-leds.
Signed-off-by: NFlorian Vaussard <florian.vaussard@epfl.ch>
Signed-off-by: NBenoit Cousson <benoit.cousson@linaro.org>

Support the blue LED connected to the LEDB pin of the TWL4030
on the Gumstix Overo.
Signed-off-by: NFlorian Vaussard <florian.vaussard@epfl.ch>
Signed-off-by: NBenoit Cousson <b-cousson@ti.com>

The Gumstix Overo is a computer on module using an OMAP3 processor.
This module must be plugged into an expansion board.

This patch adds a first device tree support for the Overo, using the
Tobi expansion board. The current support is able to boot and mount
the rootfs from MMC.

This patche also updates the omap3 dtb build target.

Currently working:
- mmc0 (on board microSD)
- i2c0 and i2c2 (i2c1 not used)
- led on GPIO
Signed-off-by: NFlorian Vaussard <florian.vaussard@epfl.ch>
Signed-off-by: NBenoit Cousson <b-cousson@ti.com>