This removes statically assigned platform numbers and reworks the
powerpc platform probe code to use a better mechanism.  With this,
board support files can simply declare a new machine type with a
macro, and implement a probe() function that uses the flattened
device-tree to detect if they apply for a given machine.

We now have a machine_is() macro that replaces the comparisons of
_machine with the various PLATFORM_* constants.  This commit also
changes various drivers to use the new macro instead of looking at
_machine.
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

Documentation: Added FSL SOC SEC node definition

Updated the documentation to include the definition of the SEC device
node format for Freescale SOC devices.
Signed-off-by: NKim Phillips <kim.phillips@freescale.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

Updated the documentation to include the definition of the USB device
node format for Freescale SOC devices.
Signed-off-by: NBecky Bruce <becky.bruce@freescale.com>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

Updated SOC node definition in documentation to include bus-frequency
property. Also extended mdio example to match specification.
Signed-off-by: NBecky Bruce <becky.bruce@freescale.com>
Signed-off-by: NKumar Gala <galak@gate.crashing.org>
Signed-off-by: NPaul Mackerras <paulus@samba.org>

The flattened device tree is the only supported way of booting ARCH=powerpc
kernels on non Open Firmware machines.  The documentation for the flattened
tree format and contents has been discussed on mailing lists and lately has
been living in the dtc git tree.  Really, it ought to go in the kernel's
Documentation directory for maximum visibility.
Signed-off-by: NDavid Gibson <dwg@au1.ibm.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>