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Biju Das <biju.das.jz@bp.renesas.com> says: The CAN FD IP found on RZ/G2L SoC has some HW features different to that of R-Car. For example, it has multiple resets, dedicated channel tx and error interrupts, separate global rx and error interrupts compared to shared irq for R-Car. it does not s ECC error flag registers and clk post divider present on R-Car. Similarly, R-Car V3U has 8 channels whereas other SoCs has only 2 channels. Currently all the HW differences are handled by comparing with chip_id enum. This patch series aims to replace chip_id with struct rcar_canfd_hw_info to handle the HW feature differences and driver data present on both IPs. The changes are trivial and tested on RZ/G2L SMARC EVK. This patch series depend upon [1]. [1] https://lore.kernel.org/all/20221025155657.1426948-1-biju.das.jz@bp.renesas.com changes since v2: https://lore.kernel.org/all/20221026131732.1843105-1-biju.das.jz@bp.renesas.com * Replaced data type of max_channels from unsigned int->u8 to save memory. * Replaced data type of postdiv from unsigned int->u8 to save memory. changes since v1: https://lore.kernel.org/all/20221022104357.1276740-1-biju.das.jz@bp.renesas.com * Updated commit description for R-Car V3U SoC detection using driver data. * Replaced data type of max_channels from u32->unsigned int. * Replaced multi_global_irqs->shared_global_irqs to make it positive checks. * Replaced clk_postdiv->postdiv driver data variable. * Simplified the calcualtion for fcan_freq. * Replaced info->has_gerfl to gpriv->info->has_gerfl and wrapped the ECC error flag checks inside a single if statement. * Added Rb tag from Geert patch#1,#2,#3 and #5 Link: https://lore.kernel.org/all/20221027082158.95895-1-biju.das.jz@bp.renesas.com [mkl: only take patches 1...5 to avoid merge conflict] Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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.