kernel/git/stable/linux-stable.git/drivers/of/fdt.c, branch linux-2.6.35.y

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

of: use __be32 for cell value accessors

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

Currently, we're using u32 for cell values, and hence assuming host-endian device trees. As we'd like to support little-endian platforms, use a __be32 for cell values, and convert in the cell accessors. Signed-off-by: Jeremy Kerr Signed-off-by: Grant Likely

of/flattree: use OF_ROOT_NODE_{SIZE,ADDR}_CELLS DEFAULT for fdt parsing

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

At present we're using hard-coded values for defaults when parsing the FDT. This change uses the #defines instead. Signed-off-by: Jeremy Kerr Signed-off-by: Grant Likely

of/flattree: use callback to setup initrd from /chosen

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

At present, the fdt code sets the kernel-wide initrd_start and initrd_end variables when parsing /chosen. On ARM, we only set these once the bootmem has been reserved. This change adds an arch hook to setup the initrd from the device tree: void early_init_dt_setup_initrd_arch(unsigned long start, unsigned long end); The arch-specific code can then setup the initrd however it likes. Compiled on powerpc, with CONFIG_BLK_DEV_INITRD=y and =n. Signed-off-by: Jeremy Kerr Signed-off-by: Grant Likely

of/flattree: merge early_init_dt_scan_memory() common code

2010-02-09T15:33:10+00:00

Merge common code between PowerPC and Microblaze architectures. Signed-off-by: Grant Likely Acked-by: Michal Simek