linux.git/drivers/of/fdt.c, branch v2.6.37

of/flattree: Eliminate need to provide early_init_dt_scan_chosen_arch

2010-10-21T17:10:10+00:00

This patch refactors the early init parsing of the chosen node so that
architectures aren't forced to provide an empty implementation of
early_init_dt_scan_chosen_arch.  Instead, if an architecture wants to
do something different, it can either use a wrapper function around
early_init_dt_scan_chosen(), or it can replace it altogether.

This patch was written in preparation to adding device tree support to
both x86 ad MIPS.

Signed-off-by: Grant Likely 
Tested-by: David Daney

of: Fix phandle endian issues

2010-07-24T22:51:52+00:00

The flat tree code wasn't fixing the endianness on phandle values when
unflattening the tree, and the code in drivers/of wasn't always doing a
be32_to_cpu before trying to dereference the phandle values.  This patch
fixes them.

Signed-off-by: Grant Likely

of/flattree: fix of_flat_dt_is_compatible() to match the full compatible string

2010-07-24T22:51:51+00:00

With the current string comparison, a device tree compatible of "foo-bar"
would match as compatible with a driver looking for "foo".  This patch
fixes the function to use the of_compat_cmp() macro so that it does the
right thing on all platforms (If sparc ever uses this code, it will still
want the strncasecmp() behaviour).

Signed-off-by: Stuart Yoder 
Signed-off-by: Grant Likely

of/flattree: Use common ALIGN() macro instead of arch specific _ALIGN

2010-07-15T05:55:23+00:00

There's no reason to use the powerpc-specific _ALIGN macro in the fdt
code.  Replace it with ALIGN() from kernel.h

Signed-off-by: Grant Likely 
Acked-By: Jeremy Kerr 
Acked-by: Benjamin Herrenschmidt

of/flattree: Make unflatten_device_tree() safe to call from any arch

2010-04-29T00:20:29+00:00

This patch makes unflatten_device_tree() safe to call from any arch
setup code with the following changes:
- Make sure initial_boot_params actually points to a device tree blob
  before unflattening
- Make sure the initial_boot_params->magic field is correct
- If CONFIG_OF_FLATTREE is not set, then make unflatten_device_tree()
  an empty static inline function.

This patch also adds some additional debug output to the top of
unflatten_device_tree().

Signed-off-by: Grant Likely

of/flattree: Fix unhandled OF_DT_NOP tag when unflattening the device tree

2010-03-27T04:09:56+00:00

NOPs within the property section are skipped, but NOPs between
OF_DT_END_NODE and OF_DT_BEGIN_NODE were not. My firmware NOPs out
entire nodes depending on various environment parameters.

of_scan_flat_dt already handles NOP more generally.

Signed-off-by: Jason Gunthorpe 
Signed-off-by: Grant Likely

of/flattree: Don't assume HAVE_LMB

2010-02-14T14:13:47+00:00

We don't always have lmb available, so make arches provide an
early_init_dt_alloc_memory_arch() to handle the allocation of
memory in the fdt code.

When we don't have lmb.h included, we need asm/page.h for __va.

Signed-off-by: Jeremy Kerr 
Signed-off-by: Grant Likely 
Acked-by: Benjamin Herrenschmidt 
Acked-by: Michal Simek

of/flattree: Make the kernel accept ePAPR style phandle information

2010-02-09T15:34:10+00:00

Currently when processing flattened device trees, the kernel expects
the phandle in a property called "linux,phandle".  The ePAPR spec -
not being Linux specific - instead requires phandles to be encoded in
a property named simply "phandle".  This patch makes the kernel accept
either form when unflattening the device tree.

Signed-off-by: David Gibson 
Signed-off-by: Grant Likely

of/flattree: endian-convert members of boot_param_header

2010-02-09T15:34:10+00:00

The boot_param_header has big-endian fields, so change the types to
__be32, and perform endian conversion when we access them.

Signed-off-by: Jeremy Kerr 
Signed-off-by: Grant Likely

of: assume big-endian properties, adding conversions where necessary

2010-02-09T15:34:10+00:00

Properties in the device tree are specified as big-endian. At present,
the only platforms to support device trees are also big-endian, so we've
been acessing the properties as raw values.

We'd like to add device tree support to little-endian platforms too, so
add endian conversion to the sites where we access property values in
the common of code.

Compiled on powerpc (ppc44x_defconfig & ppc64_defconfig) and arm (fdt
support only for now).

Signed-off-by: Jeremy Kerr 
Signed-off-by: Grant Likely