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49625c6e4d
The control register for TWSI8 clocks, APBC_TWSI8_CLK_RST, contains mux selection bits, reset assertion bit and enable bits for function and bus clocks. It has a quirk that reading always results in zero. As a workaround, let's hardcode the mux value as zero to select pll1_d78_31p5 as parent and treat twsi8_clk as a gate, whose enable mask is combined from the real bus and function clocks to avoid the write-only register being shared between two clk_hws, in which case updates of one clk_hw zero the other's bits. With a 1:1 factor serving as placeholder for the bus clock, the I2C-8 controller could be brought up, which is essential for boards attaching power-management chips to it. Signed-off-by: Haylen Chu <heylenay@4d2.org> Reviewed-by: Alex Elder <elder@riscstar.com> Reviewed-by: Yixun Lan <dlan@gentoo.org> Link: https://lore.kernel.org/r/20250416135406.16284-5-heylenay@4d2.org Signed-off-by: Yixun Lan <dlan@gentoo.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.