linux.git/drivers/of/fdt.c, branch v4.16

of/fdt: use memblock_virt_alloc for early alloc

2018-01-08T14:24:34+00:00

memblock_virt_alloc() works for both memblock and bootmem, so use it and
make early_init_dt_alloc_memory_arch a static function. The arches using
bootmem define early_init_dt_alloc_memory_arch as either:

__alloc_bootmem(size, align, __pa(MAX_DMA_ADDRESS))

or:

alloc_bootmem_align(size, align)

Both of these evaluate to the same thing as does memblock_virt_alloc for
bootmem. So we can disable the arch specific functions by making
early_init_dt_alloc_memory_arch static and they can be removed in
subsequent commits.

Cc: Frank Rowand 
Signed-off-by: Rob Herring

of: Use SPDX license tag for DT files

2018-01-08T14:22:45+00:00

Convert remaining DT files to use SPDX-License-Identifier tags.

Cc: Benjamin Herrenschmidt 
Cc: Guennadi Liakhovetski 
Cc: Paul Mackerras 
Cc: Pantelis Antoniou 
Reviewed-by: Frank Rowand 
Reviewed-by: Philippe Ombredanne 
Signed-off-by: Rob Herring

of/fdt: Document detached argument to __unflatten_device_tree()

2017-10-16T21:49:18+00:00

This wasn't documented.

Signed-off-by: Stephen Boyd 
Reviewed-by: Frank Rowand 
Signed-off-by: Rob Herring

of/fdt: skip unflattening of disabled nodes

2017-10-16T18:43:29+00:00

For static DT usecases, we don't need the disabled nodes and can skip
unflattening. This saves a significant amount of RAM in memory constrained
cases. In one example on STM32F469, the RAM usage goes from 118K to 26K.

There are a few cases in the kernel that modify the status property
dynamically. These all are changes from enabled to disabled, depend on
OF_DYNAMIC or are not FDT based (PDT based).

Tested-by: Nicolas Pitre 
Reviewed-by: Frank Rowand 
Signed-off-by: Rob Herring

of/fdt: add of_fdt_device_is_available function

2017-10-16T18:43:21+00:00

Add an equivalent function to of_device_is_available for flattened DT, and
convert the one existing open coded occurrence.

Tested-by: Nicolas Pitre 
Reviewed-by: Frank Rowand 
Signed-off-by: Rob Herring

of/fdt: only store the device node basename in full_name

2017-10-03T20:02:11+00:00

With dependencies on a statically allocated full path name converted to
use %pOF format specifier, we can store just the basename of node, and
the unflattening of the FDT can be simplified.

This commit will affect the remaining users of full_name. After
analyzing these users, the remaining cases should only change some print
messages. The main users of full_name are providing a name for struct
resource. The resource names shouldn't be important other than providing
/proc/iomem names.

We no longer distinguish between pre and post 0x10 dtb formats as either
a full path or basename will work. However, less than 0x10 formats have
been broken since the conversion to use libfdt (and no one has cared).
The conversion of the unflattening code to be non-recursive also broke
pre 0x10 formats as the populate_node function would return 0 in that
case.

Signed-off-by: Rob Herring

Merge tag 'devicetree-for-4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux

2017-07-07T17:37:54+00:00

Pull DeviceTree updates from Rob Herring:

- vsprintf format specifier %pOF for device_node's. This will enable us
to stop storing the full node names. Conversion of users will happen
next cycle.

- Update documentation to point to DT specification instead of ePAPR.

- Split out graph and property functions to a separate file.

- New of-graph functions for ALSA

- Add vendor prefixes for RISC-V, Linksys, iWave Systems, Roofull,
Itead, and BananaPi.

- Improve dtx_diff utility filename printing.

* tag 'devicetree-for-4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (32 commits)
of: document /sys/firmware/fdt
dt-bindings: Add RISC-V vendor prefix
vsprintf: Add %p extension "%pOF" for device tree
of: find_node_by_full_name rewrite to compare each level
of: use kbasename instead of open coding
dt-bindings: thermal: add file extension to brcm,ns-thermal
of: update ePAPR references to point to Devicetree Specification
scripts/dtc: dtx_diff - Show real file names in diff header
of: detect invalid phandle in overlay
of: be consistent in form of file mode
of: make __of_attach_node() static
of: address.c header comment typo
of: fdt.c header comment typo
of: make of_fdt_is_compatible() static
dt-bindings: display-timing.txt convert non-ascii characters to ascii
Documentation: remove overlay-notes reference to non-existent file
dt-bindings: usb: exynos-usb: Add missing required VDD properties
dt-bindings: Add vendor prefix for Linksys
MAINTAINERS: add device tree ABI documentation file
of: Add vendor prefix for iWave Systems Technologies Pvt. Ltd
...

of: fdt.c header comment typo

2017-06-22T16:14:56+00:00

Fix typo in header comment for early_init_dt_scan_memory()

Signed-off-by: Frank Rowand 
Signed-off-by: Rob Herring

of: make of_fdt_is_compatible() static

2017-06-22T16:14:48+00:00

The callers of of_fdt_is_compatible() are all in fdt.c so
make it static.

Signed-off-by: Frank Rowand 
Signed-off-by: Rob Herring

Merge tag 'devicetree-fixes-for-4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux

2017-05-19T22:03:24+00:00

Pull DeviceTree fixes from Rob Herring:

 - fix missing allocation failure handling in fdt code

 - fix dtc compile error on 32-bit hosts

 - revert bad sparse changes causing GCC7 warnings

* tag 'devicetree-fixes-for-4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux:
  of: fdt: add missing allocation-failure check
  dtc: check.c fix compile error
  Partially Revert "of: fix sparse warnings in fdt, irq, reserved mem, and resolver code"