f00647d812
Add support for the basic extended CAN controller (bxCAN) found in many low- to middle-end STM32 SoCs. It supports the Basic Extended CAN protocol versions 2.0A and B with a maximum bit rate of 1 Mbit/s. The controller supports two channels (CAN1 as primary and CAN2 as secondary) and the driver can enable either or both of the channels. They share some of the required logic (e. g. clocks and filters), and that means you cannot use the secondary CAN without enabling some hardware resources managed by the primary CAN. Each channel has 3 transmit mailboxes, 2 receive FIFOs with 3 stages and 28 scalable filter banks. It also manages 4 dedicated interrupt vectors: - transmit interrupt - FIFO 0 receive interrupt - FIFO 1 receive interrupt - status change error interrupt Driver uses all 3 available mailboxes for transmission and FIFO 0 for reception. Rx filter rules are configured to the minimum. They accept all messages and assign filter 0 to CAN1 and filter 14 to CAN2 in identifier mask mode with 32 bits width. It enables and uses transmit, receive buffers for FIFO 0 and error and status change interrupts. Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com> Reviewed-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr> Link: https://lore.kernel.org/all/20230328073328.3949796-6-dario.binacchi@amarulasolutions.com Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de> |
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| LICENSES | ||
| arch | ||
| block | ||
| certs | ||
| crypto | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
| mm | ||
| net | ||
| rust | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .rustfmt.toml | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
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 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.