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path: root/drivers/of/fdt.c
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2011-05-11dt/flattree: explicitly pass command line pointer to early_init_dt_scan_chosenGrant Likely1-4/+4
This patch drops the reference to a global 'cmd_line' variable from early_init_dt_scan_chosen, and instead passes the pointer to the command line string via the *data argument. Each architecture does something slightly different with the initial command line, so it makes sense for the architecture to be able to specify the variable name. Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-03-31Fix common misspellingsLucas De Marchi1-1/+1
Fixes generated by 'codespell' and manually reviewed. Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
2011-03-23of/flattree: minor cleanupsAndres Salomon1-2/+4
- static-ize some functions - add some additional comments Signed-off-by: Andres Salomon <dilinger@queued.net> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-01-15dt/flattree: Return virtual address from early_init_dt_alloc_memory_arch()Grant Likely1-7/+1
The physical address is never used by the device tree code when allocating memory for unflattening. Change the architecture's alloc hook to return the virutal address instead. Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-01-01of/flattree: Add of_flat_dt_match() helper functionGrant Likely1-2/+35
This patch adds of_flat_dt_match() which tests a node for compatibility with a list of values and converts the relevant powerpc platform code to use it. This approach simplifies the board support code a bit. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com>
2010-12-29of/flattree: Refactor unflatten_device_tree and add fdt_unflatten_treeStephen Neuendorffer1-51/+98
unflatten_device_tree has two dependencies on things that happen during boot time. Firstly, it references the initial device tree directly. Secondly, it allocates memory using the early boot allocator. This patch factors out these dependencies and uses the new __unflatten_device_tree function to implement a driver-visible fdt_unflatten_tree function, which can be used to unflatten a blob after boot time. V2: - remove extra __va() call - make dt_alloc functions return void *. This doesn't fix the general strangeness in this code that constantly casts back and forth between unsigned long and __be32 * Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-12-29of/flattree: Reorder unflatten_dt_nodeStephen Neuendorffer1-109/+109
Move unflatten_dt_node to be grouped with non-__init functions. Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-12-29of/flattree: Refactor unflatten_dt_nodeStephen Neuendorffer1-11/+16
unflatten_dt_node is a helper function that does most of the work to convert a device tree blob into tree of device nodes. This code now uses a passed-in blob instead of using the single boot-time blob, allowing it to be called in more contexts. Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-12-29of/flattree: Add non-boottime device tree functionsStephen Neuendorffer1-54/+79
In preparation for providing run-time handling of device trees, factor out some of the basic functions so that they take an arbitrary blob, rather than relying on the single boot-time tree. V2: - functions have of_fdt_* names - removed find_flat_dt_string - blob argument is first Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-12-29of/flattree: Add Kconfig for EARLY_FLATTREEStephen Neuendorffer1-0/+4
The device tree code is now in two pieces: some which can be used generically on any platform which selects CONFIG_OF_FLATTREE, and some early which is used at boot time on only a few architectures. This patch segregates the early code so that only those architectures which care about it need compile it. This also means that some of the requirements in the early code (such as a cmd_line variable) that most architectures (e.g. X86) don't provide can be ignored. Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> [grant.likely@secretlab.ca: remove extra blank line addition] [grant.likely@secretlab.ca: fixed incorrect #ifdef CONFIG_EARLY_FLATTREE check] [grant.likely@secretlab.ca: Made OF_EARLY_FLATTREE select instead of depend on OF_FLATTREE] Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-10-21of/flattree: Eliminate need to provide early_init_dt_scan_chosen_archGrant Likely1-2/+0
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 <grant.likely@secretlab.ca> Tested-by: David Daney <ddaney@caviumnetworks.com>
2010-07-24of: Fix phandle endian issuesGrant Likely1-2/+2
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 <grant.likely@secretlab.ca>
2010-07-24of/flattree: fix of_flat_dt_is_compatible() to match the full compatible stringStuart Yoder1-1/+1
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 <stuart.yoder@freescale.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-07-14of/flattree: Use common ALIGN() macro instead of arch specific _ALIGNGrant Likely1-10/+10
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 <grant.likely@secretlab.ca> Acked-By: Jeremy Kerr <jeremy.kerr@canonical.com> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2010-04-28of/flattree: Make unflatten_device_tree() safe to call from any archGrant Likely1-0/+15
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 <grant.likely@secretlab.ca>
2010-03-26of/flattree: Fix unhandled OF_DT_NOP tag when unflattening the device treeJason Gunthorpe1-2/+5
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 <jgunthorpe@obsidianresearch.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-02-14of/flattree: Don't assume HAVE_LMBJeremy Kerr1-3/+6
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 <jeremy.kerr@canonical.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Michal Simek <monstr@monstr.eu>
2010-02-09of/flattree: Make the kernel accept ePAPR style phandle informationDavid Gibson1-1/+10
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 <david@gibson.dropbear.id.au> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-02-09of/flattree: endian-convert members of boot_param_headerJeremy Kerr1-8/+8
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 <jeremy.kerr@canonical.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-02-09of: assume big-endian properties, adding conversions where necessaryJeremy Kerr1-20/+25
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 <jeremy.kerr@canonical.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-02-09of: use __be32 for cell value accessorsJeremy Kerr1-2/+2
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 <jeremy.kerr@canonical.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-02-09of/flattree: use OF_ROOT_NODE_{SIZE,ADDR}_CELLS DEFAULT for fdt parsingJeremy Kerr1-2/+2
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 <jeremy.kerr@canonical.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-02-09of/flattree: use callback to setup initrd from /chosenJeremy Kerr1-16/+11
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 <jeremy.kerr@canonical.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-02-09of/flattree: merge early_init_dt_scan_memory() common codeGrant Likely1-0/+50
Merge common code between PowerPC and Microblaze architectures. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Michal Simek <monstr@monstr.eu>
2010-01-28of: unify phandle name in struct device_nodeGrant Likely1-4/+3
In struct device_node, the phandle is named 'linux_phandle' for PowerPC and MicroBlaze, and 'node' for SPARC. There is no good reason for the difference, it is just an artifact of the code diverging over a couple of years. This patch renames both to simply .phandle. Note: the .node also existed in PowerPC/MicroBlaze, but the only user seems to be arch/powerpc/platforms/powermac/pfunc_core.c. It doesn't look like the assignment between .linux_phandle and .node is significantly different enough to warrant the separate code paths unless ibm,phandle properties actually appear in Apple device trees. I think it is safe to eliminate the old .node property and use phandle everywhere. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: David S. Miller <davem@davemloft.net> Tested-by: Wolfram Sang <w.sang@pengutronix.de> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-12-10of/flattree: merge early_init_dt_scan_chosen()Grant Likely1-0/+38
Merge common code between PowerPC and Microblaze. This patch splits the arch-specific stuff out into a new function, early_init_dt_scan_chosen_arch(). Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Tested-by: Wolfram Sang <w.sang@pengutronix.de> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-12-10of/flattree: merge dt_mem_next_cellGrant Likely1-0/+8
Merge common code between PowerPC and Microblaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Tested-by: Wolfram Sang <w.sang@pengutronix.de>
2009-12-10of/flattree: Merge earlyinit_dt_scan_root()Grant Likely1-0/+26
Merge common code between PowerPC and Microblaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Tested-by: Wolfram Sang <w.sang@pengutronix.de>
2009-12-10of/flattree: Merge early_init_dt_check_for_initrd()Grant Likely1-0/+37
Merge common code between PowerPC and Microblaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Tested-by: Wolfram Sang <w.sang@pengutronix.de> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2009-11-23of/flattree: Merge unflatten_device_treeGrant Likely1-0/+52
Merge common code between PowerPC and MicroBlaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Wolfram Sang <w.sang@pengutronix.de> Tested-by: Michal Simek <monstr@monstr.eu>
2009-11-23of/flattree: Merge unflatten_dt_nodeGrant Likely1-0/+200
Merge common code between PowerPC and MicroBlaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Wolfram Sang <w.sang@pengutronix.de> Tested-by: Michal Simek <monstr@monstr.eu>
2009-11-23of/flattree: Merge of_flat_dt_is_compatibleGrant Likely1-0/+24
Merge common code between PowerPC and Microblaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Wolfram Sang <w.sang@pengutronix.de> Tested-by: Michal Simek <monstr@monstr.eu>
2009-11-23of/flattree: merge of_get_flat_dt_propGrant Likely1-0/+43
Merge common code between PowerPC and Microblaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Wolfram Sang <w.sang@pengutronix.de> Tested-by: Michal Simek <monstr@monstr.eu>
2009-11-23of/flattree: merge of_get_flat_dt_rootGrant Likely1-0/+16
Merge common code between PowerPC and MicroBlaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Wolfram Sang <w.sang@pengutronix.de> Tested-by: Michal Simek <monstr@monstr.eu>
2009-11-23of/flattree: merge of_scan_flat_dtGrant Likely1-0/+64
Merge common code between PowerPC and Microblaze Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Wolfram Sang <w.sang@pengutronix.de> Tested-by: Michal Simek <monstr@monstr.eu>
2009-11-23of/flattree: merge find_flat_dt_string and initial_boot_paramsGrant Likely1-0/+21
Merge common code between Microblaze and PowerPC. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Wolfram Sang <w.sang@pengutronix.de> Tested-by: Michal Simek <monstr@monstr.eu>
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