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The CMN PLL clock controller supplies clocks to the hardware blocks that together make up the Ethernet function on Qualcomm IPQ SoCs and to GCC. The driver is initially supported for IPQ9574 SoC. The CMN PLL clock controller expects a reference input clock from the on-board Wi-Fi block acting as clock source. The input reference clock needs to be configured to one of the supported clock rates. The controller supplies a number of fixed-rate output clocks. For the IPQ9574, there is one output clock of 353 MHZ to PPE (Packet Process Engine) hardware block, three 50 MHZ output clocks and an additional 25 MHZ output clock supplied to the connected Ethernet devices. The PLL also supplies a 24 MHZ clock as XO and a 32 KHZ sleep clock to GCC, and one 31.25 MHZ clock to PCS. Signed-off-by: Luo Jie <quic_luoj@quicinc.com> Acked-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com> Link: https://lore.kernel.org/r/20250103-qcom_ipq_cmnpll-v8-2-c89fb4d4849d@quicinc.com Signed-off-by: Bjorn Andersson <andersson@kernel.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.