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According to the public S805 datasheet HHI_SYS_CPU_CLK_CNTL1[29:20] is the register for the CPU scale_div clock. This matches the code in Amlogic's 3.10 GPL kernel sources: N = (aml_read_reg32(P_HHI_SYS_CPU_CLK_CNTL1) >> 20) & 0x3FF; This means that the divider register is 10 bit wide instead of 9 bits. So far this is not a problem since all u-boot versions I have seen are not using the cpu_scale_div clock at all (instead they are configuring the CPU clock to run off cpu_in_sel directly). The fixes tag points to the latest rework of the CPU clocks. However, even before the rework it was wrong. Commit7a29a86943("clk: meson: Add support for Meson clock controller") defines MESON_N_WIDTH as 9 (in drivers/clk/meson/clk-cpu.c). But since the old clk-cpu implementation this only carries the fixes tag for the CPU clock rewordk. Fixes:251b6fd38b("clk: meson: rework meson8b cpu clock") Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com> Link: https://lkml.kernel.org/r/20180927085921.24627-3-martin.blumenstingl@googlemail.com
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 Restructured Text 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.