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b88cd5c854
USIv1 IP-core is found on some ARM64 Exynos SoCs (like Exynos8895) and provides selectable serial protocols (one of: HSI2C0, HSI2C1, HSI2C0_1, SPI, UART, UART_HSI2C1). USIv1, unlike USIv2, doesn't have any known register map. Underlying protocols that it implements have no offset, like with Exynos850. Desired protocol can be chosen via SW_CONF register from System Register block of the same domain as USI. In order to select a particular protocol, the protocol has to be selected via the System Register. Unlike USIv2, there's no need for any setup before the given protocol becomes accessible apart from enabling the APB clock and the protocol operating clock. Modify the existing driver in order to allow USIv1 instances in Exynos8895 to probe and set their protocol. While we're at it, make use of the new mode constants in place of the old ones. Signed-off-by: Ivaylo Ivanov <ivo.ivanov.ivanov1@gmail.com> Link: https://lore.kernel.org/r/20250204172803.3425496-4-ivo.ivanov.ivanov1@gmail.com Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.