Implement the bootsource detection by reading the BOOT_MODE SLCR register
which holds the strap values used to select the boot source.

Signed-off-by: Lucas Stach <dev@lynxeye.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

All the currently supported devices can now be probed
from the DT. Remove platform devices and switch to DT.

Signed-off-by: Lucas Stach <dev@lynxeye.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

The clock controller is a subregion of the SLCR, use the real base
of this region for mapping the registers. This will allow to switch
to DT based probing later.

Signed-off-by: Lucas Stach <dev@lynxeye.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

The patch fixes the following compiler's warning:

In file included from include/common.h:33:0,
                 from arch/arm/mach-zynq/zynq.c:18:
arch/arm/include/asm/io.h:4:0: warning: "IO_SPACE_LIMIT" redefined
 #define IO_SPACE_LIMIT 0

In file included from
arch/arm/mach-zynq/zynq.c:17:0:
include/asm-generic/io.h:92:0: note: this is the location of the previous definition
 #define IO_SPACE_LIMIT 0xffff

Cc: Steffen Trumtrar <s.trumtrar@pengutronix.de>
Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

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>

Add basic support for the Xilinx Zynq-7000 EPP architecture.
The Zynq-7000 is an embedded processing platform that combines a Cortex A9
dualcore MPSoC with an Artix-7 FPGA.

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