linux.git/scripts/dtc, branch v6.10

dt-bindings: kbuild: Fix dt_binding_check on unconfigured build

2024-05-29T16:15:58+00:00

The 'dt_binding_check' target shouldn't depend on the kernel
configuration, but it has since commit 604a57ba9781 ("dt-bindings:
kbuild: Add separate target/dependency for processed-schema.json").
That is because CHECK_DT_BINDING make variable was dropped, but
scripts/dtc/Makefile was missed. The CHECK_DTBS variable can be used
instead.

Reported-by: Francesco Dolcini 
Fixes: 604a57ba9781 ("dt-bindings: kbuild: Add separate target/dependency for processed-schema.json")
Signed-off-by: "Rob Herring (Arm)" 
Signed-off-by: Masahiro Yamada

kbuild: use $(src) instead of $(srctree)/$(src) for source directory

2024-05-09T19:34:52+00:00

Kbuild conventionally uses $(obj)/ for generated files, and $(src)/ for
checked-in source files. It is merely a convention without any functional
difference. In fact, $(obj) and $(src) are exactly the same, as defined
in scripts/Makefile.build:

    src := $(obj)

When the kernel is built in a separate output directory, $(src) does
not accurately reflect the source directory location. While Kbuild
resolves this discrepancy by specifying VPATH=$(srctree) to search for
source files, it does not cover all cases. For example, when adding a
header search path for local headers, -I$(srctree)/$(src) is typically
passed to the compiler.

This introduces inconsistency between upstream and downstream Makefiles
because $(src) is used instead of $(srctree)/$(src) for the latter.

To address this inconsistency, this commit changes the semantics of
$(src) so that it always points to the directory in the source tree.

Going forward, the variables used in Makefiles will have the following
meanings:

  $(obj)     - directory in the object tree
  $(src)     - directory in the source tree  (changed by this commit)
  $(objtree) - the top of the kernel object tree
  $(srctree) - the top of the kernel source tree

Consequently, $(srctree)/$(src) in upstream Makefiles need to be replaced
with $(src).

Signed-off-by: Masahiro Yamada 
Reviewed-by: Nicolas Schier

dt: dt-extract-compatibles: Don't follow symlinks when walking tree

2023-11-09T17:56:39+00:00

The iglob function, which we use to find C source files in the kernel
tree, always follows symbolic links. This can cause unintentional
recursions whenever a symbolic link points to a parent directory. A
common scenario is building the kernel with the output set to a
directory inside the kernel tree, which will contain such a symlink.

Instead of using the iglob function, use os.walk to traverse the
directory tree, which by default doesn't follow symbolic links. fnmatch
is then used to match the glob on the filename, as well as ignore hidden
files (which were ignored by default with iglob).

This approach runs just as fast as using iglob.

Fixes: b6acf8073517 ("dt: Add a check for undocumented compatible strings in kernel")
Reported-by: Aishwarya TCV 
Closes: https://lore.kernel.org/all/e90cb52f-d55b-d3ba-3933-6cc7b43fcfbc@arm.com
Signed-off-by: "Nícolas F. R. A. Prado" 
Link: https://lore.kernel.org/r/20231107225624.9811-1-nfraprado@collabora.com
Signed-off-by: Rob Herring

dt: dt-extract-compatibles: Add flag for driver matching compatibles

2023-09-20T19:25:10+00:00

Add a new flag, '--driver-match', to the dt-extract-compatibles script
that causes it to only print out compatibles that are expected to match
a driver. This output can then be used by tests to detect device probe
failures.

In order to filter the compatibles down to only ones that will match to
a driver, the following is considered:
- A compatible needs to show up in a driver's of_match_table for it to
  be matched to a driver
- Compatibles that are used in both of_match_table and OF_DECLARE type
  macros can't be expected to match to a driver and so are ignored.
  One exception is CLK_OF_DECLARE_DRIVER, since it indicates that a
  driver will also later probe, so compatibles in this macro are not
  ignored.

Signed-off-by: Nícolas F. R. A. Prado 
Link: https://lore.kernel.org/r/20230828211424.2964562-3-nfraprado@collabora.com
Signed-off-by: Rob Herring

dt: dt-extract-compatibles: Handle cfile arguments in generator function

2023-09-20T19:25:10+00:00

Move the handling of the cfile arguments to a separate generator
function to avoid redundancy.

Signed-off-by: Nícolas F. R. A. Prado 
Link: https://lore.kernel.org/r/20230828211424.2964562-2-nfraprado@collabora.com
Signed-off-by: Rob Herring

dt: dt-check-compatible: Find struct of_device_id instances with compiler annotations

2023-08-17T18:07:39+00:00

The regex search for declarations of struct of_device_id was missing
cases that had a compiler annotation such as "__maybe_unused". Improve
the regex to allow for these. Use '\S' instead of specific characters to
shorten the regex. That also finds some more compatibles using '.'
characters.

Unfortunately, these changes add ~400 more compatibles without a
schema.

Reviewed-by: Conor Dooley 
Link: https://lore.kernel.org/r/20230804190130.1936566-1-robh@kernel.org
Signed-off-by: Rob Herring

dts: add riscv include prefix link

2023-03-27T20:45:22+00:00

The Allwinner D1/D1s SoCs (with a RISC-V core) use an (almost?) identical
die as their R528/T113-s siblings with ARM Cortex-A7 cores.

To allow sharing the basic SoC .dtsi files across those two
architectures as well, introduce a symlink to the RISC-V DT directory.

Signed-off-by: Andre Przywara 
Reviewed-by: Conor Dooley 
Acked-by: Palmer Dabbelt 
Link: https://lore.kernel.org/r/20230320005249.13403-2-andre.przywara@arm.com
Signed-off-by: Jernej Skrabec

of: add processing of EXPECT_NOT to of_unittest_expect

2023-02-17T21:46:20+00:00

scripts/dtc/of_unittest_expect processes EXPECT messages that
document expected kernel messages triggered by unittest.  Add
processing of EXPECT_NOT messages that document kernel messages
triggered by unittest that are not expected.

This is commit 2 of 2, implementing the processing of EXPECT_NOT
messages.

Signed-off-by: Frank Rowand 
Link: https://lore.kernel.org/r/20230213185702.395776-3-frowand.list@gmail.com
Signed-off-by: Rob Herring

of: prepare to add processing of EXPECT_NOT to of_unittest_expect

2023-02-17T21:46:20+00:00

scripts/dtc/of_unittest_expect processes EXPECT messages that
document expected kernel messages triggered by unittest.  Add
processing of EXPECT_NOT messages that document kernel messages
triggered by unittest that are not expected.

This is commit 1 of 2, renaming existing variables in anticipation
of the changes needed to process EXPECT_NOT, so that commit 2 of 2
will be smaller and easier to read.  This commit is not intended
to make any functional changes.

Signed-off-by: Frank Rowand 
Link: https://lore.kernel.org/r/20230213185702.395776-2-frowand.list@gmail.com
Signed-off-by: Rob Herring

scripts/dtc: Update to upstream version v1.6.1-66-gabbd523bae6e

2023-02-06T17:03:00+00:00

This adds the following commits from upstream:

abbd523bae6e pylibfdt: Work-around SWIG limitations with flexible arrays
a41509bea3e7 libfdt: Replace deprecated 0-length arrays with proper flexible arrays
2cd89f862cdb dtc: Warning rather than error on possible truncation of cell values

Reviewed-by: Kees Cook 
Link: https://lore.kernel.org/all/20230203172430.474431-1-robh@kernel.org/
Signed-off-by: Rob Herring