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Wei Fang says: ==================== net: add basic support for i.MX95 NETC This is first time that the NETC IP is applied on i.MX MPU platform. Its revision has been upgraded to 4.1, which is very different from the NETC of LS1028A (its revision is 1.0). Therefore, some existing drivers of NETC devices in the Linux kernel are not compatible with the current hardware. For example, the fsl-enetc driver is used to drive the ENETC PF of LS1028A, but for i.MX95 ENETC PF, its registers and tables configuration are very different from those of LS1028A, and only the station interface (SI) part remains basically the same. For the SI part, Vladimir has separated the fsl-enetc-core driver, so we can reuse this driver on i.MX95. However, for other parts of PF, the fsl-enetc driver cannot be reused, so the nxp-enetc4 driver is added to support revision 4.1 and later. During the development process, we found that the two PF drivers have some interfaces with basically the same logic, and the only difference is the hardware configuration. So in order to reuse these interfaces and reduce code redundancy, we extracted these interfaces and compiled them into a separate nxp-enetc-pf-common driver for use by the two PF drivers. In addition, we have developed the nxp-netc-blk-ctrl driver, which is used to control three blocks, namely Integrated Endpoint Register Block (IERB), Privileged Register Block (PRB) and NETCMIX block. The IERB contains registers that are used for pre-boot initialization, debug, and non-customer configuration. The PRB controls global reset and global error handling for NETC. The NETCMIX block is mainly used to set MII protocol and PCS protocol of the links, it also contains settings for some other functions. --- v1 Link: https://lore.kernel.org/imx/20241009095116.147412-1-wei.fang@nxp.com/ v2 Link: https://lore.kernel.org/imx/20241015125841.1075560-1-wei.fang@nxp.com/ v3 Link: https://lore.kernel.org/imx/20241017074637.1265584-1-wei.fang@nxp.com/ v4 Link: https://lore.kernel.org/imx/20241022055223.382277-1-wei.fang@nxp.com/ v5 Link: https://lore.kernel.org/imx/20241024065328.521518-1-wei.fang@nxp.com/ ==================== Signed-off-by: David S. Miller <davem@davemloft.net> |
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| README | ||
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.