[PATCH v0] clang-format: Add configuration file

[Tom Rini]

On Fri, Aug 29, 2025 at 12:30:25PM -0600, Javier Tia wrote:
> Introduce .clang-format configuration file to U-Boot, providing
> significant improvements over the existing scripts/Lindent approach for
> C code formatting.
> 
> Benefits of clang-format over scripts/Lindent:

Oh goodness, I forgot scripts/Lindent was even a thing still. We've
never updated it, and it's not even been touched in the kernel since
2017 either. We should drop the tool and also update our documentation.

> - More comprehensive formatting rules: While Lindent relies on the basic
>   'indent' tool with limited options, clang-format provides extensive
>   control over code formatting with 800+ configuration options
> 
> - Better handling of complex code structures: clang-format understands
>   modern C constructs and handles nested structures, macros, and complex
>   expressions more intelligently
> 
> - IDE and editor integration: Native support in major development
>   environments (VS Code, Vim, Emacs, etc.) enables real-time formatting
> 
> - Consistent results across environments: Eliminates variations between
>   different versions of 'indent' tool and system configurations
> 
> - Active maintenance: clang-format is actively developed and updated,
>   unlike the aging 'indent' tool
> 
> Alignment with Linux kernel practices:
> 
> Continues U-Boot alignment with Linux kernel development practices,
> maintaining consistency between these closely related projects. The
> Linux kernel adopted clang-format to modernize its code formatting
> infrastructure and improve developer experience.
> 
> The .clang-format file is based on the Linux kernel configuration,
> specifically copied from Linux kernel commit 07d9df80082b8, which
> itself builds upon the initial introduction in commit d4ef8d3ff005c
> ("clang-format: add configuration file").

As there's no change in .clang-format from v6.16 to the commit you
mention here, I'd rather say we sync this from v6.16 and so that will
make future re-syncs easier.

Then comes needing to document this. We need to update
doc/develop/codingstyle.rst to not talk about Lindent and then explain
how to use clang-format with some examples.

-- 
Tom
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