This replaces the reset_cpu() function which every SoC or board must
provide with registered handlers. This makes it possible to have multiple
reset functions for boards which have multiple ways to reset the machine.
Also boards which have no way at all to reset the machine no longer
have to provide a dummy reset_cpu() function.

The problem this solves is that some machines have external PMICs or
similar to reset the system which have to be preferred over the
internal SoC reset, because the PMIC can reset not only the SoC but also
the external devices.

To pick the right way to reset a machine each handler has a priority. The
default priority is 100 and all currently existing restart handlers are
registered with this priority. of_get_restart_priority() allows to retrieve
the priority from the device tree which makes it possible for boards to
give certain restart handlers a higher priority in order to use this one
instead of the default one.

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

Storing the boot information in the image itself and passing a pointer
around between images is cumbersome and doesn't fit well with multiimage
support where the pointer we pass around is already occupied by the
devicetree.
Do the same as U-Boot does and store the boot information at the bottom
of the SRAM public stack.
To maintain the compatibility between new xloaders and older barebox
binaries we still pass the boot information to the next stage via pointer.

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

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

This introduces a single omap_init function which detects the
SoC and does all further SoC initialization. This is done to get
rid of initcalls without proper SoC protection. The same has been
done for i.MX already.

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

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

The gpio api should be used from <gpio.h>

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

The ROM loader passes the address of a buffer to the MLO in
register 0. Store this data so we can find the boot source later.
On the same way the bootinformation are passed to the barebox,
then. It has to be enshured that r0 contains always the
buffer or the boot source detection will not work.

Applied this on all OMAPs. This patch is based on work of
Jan Luebbe <jlu@pengutronix.de>.

Compile tested on all OMAP boards.
Tested on pcm049, phyCARD-A-L1 and pcm051.

Signed-off-by: Teresa Gámez <t.gamez@phytec.de>
Tested-by: Christoph Fritz <chf.fritz@googlemail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

commit d7a9134 breaks boot source detection
for pcm049. The tracing vectors shows all tested boot sources, so order is
important. By not returning but overwriting src we effectively reversed the
order if more than one flag is set.

Signed-off-by: Jan Weitzel <j.weitzel@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Don't set SET0 voltage, because it acts as boot voltage for OPP boot.
Take care that the kernel doesn't drive vset gpio to low. This may
happen while reseting the gpio module at initialization, look for
HWMOD_INIT_NO_RESET.

Signed-off-by: Jan Weitzel <j.weitzel@phytec.de>
Reviewed-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

For OMAP4460 omap4_scale_vcores must set the voltage according to mpu freq.

OPP100  700MHz 1210mV
OPPTB   920MHz 1320mV
OPPNT  1200MHz 1380mV

Signed-off-by: Jan Weitzel <j.weitzel@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

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

Folded fix into this patch:

[PATCH] omap4 regression: set correct boot source

Signed-off-by: Vicente Bergas <vicencb@gmail.com>

On OMAP4 SoC there is a SAR memory region (Save & Rescue)
where the ROM code reads the device to boot from.
This patch adds a way to set this.

Signed-off-by: Vicente Bergas <vicencb@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

The bootsource functions are not specific to the first stage
bootloader. They may also be used for detecting the
bootsource to decide where to load the environment from.

Also clean up includes in board files.

Signed-off-by: Teresa Gámez <t.gamez@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

- remove mach/silicon.h and include omap?-silicon.h directly
- include mach/omap?-clock.h directly where needed

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

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

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

Add and use meaningful macro names for OMAP4 GPIO addresses, and add a
comment to explain the 0x100 offset for OMAP4.

Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Signed-off-by: Vicente <vicencb@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Signed-off-by: Vicente <vicencb@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Enable output instead of disabling it.

Signed-off-by: Teresa Gámez <t.gamez@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

- increased the region size for OMAP3, as it was not correct
- decrease region size for OMAP4 to prevent overlapping.

Signed-off-by: Teresa Gámez <t.gamez@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

As the gpio functions are not available at this point, set the gpio manually.

Signed-off-by: Teresa Gámez <t.gamez@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Signed-off-by: Teresa Gámez <t.gamez@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

configure  Memory Adapter for 4460

Signed-off-by: Jan Weitzel <j.weitzel@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

based on: [U-Boot] [PATCH v 4/5] omap4: support TPS programming
TPS62361 is the new power supply used in OMAP4460 that
supplies vdd_mpu.

VCORE1 from Phoenix supplies vdd_core and VCORE2 supplies
vdd_iva. VCORE3 is not used in OMAP4460.

Signed-off-by: F. Gasnier fabrice.gasnier@cenosys.com
Signed-off-by: Jan Weitzel <j.weitzel@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

replace *(volatile int*) by writel and readl

Signed-off-by: Jan Weitzel <j.weitzel@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Use <mach/clocks.h> for OMAP4.

Signed-off-by: Teresa Gámez <t.gamez@phytec.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Without yet adding in the underlying code, extend the revision
checking code to return additional values for PandaBoard ES boards.
Much of the code was taken close to verbatim from U-Boot.
compile tested, and confirmed that this code behaves identically to
the original panda configure and build for the three pandas i have:

  * Rev A2 (boots)
  * Rev EA3 (boots)
  * Rev B1 ES (no output)

so while there's still work to be done, this at least represents the
necessary infrastructure to start *recognizing* panda ES boards.

Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
Tested-by: Anand Gadiyar <gadiyar@ti.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>