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Marc Kleine-Budde 4942c42fe1 can: m_can: m_can_chip_config(): bring up interface in correct state
In some SoCs (observed on the STM32MP15) the M_CAN IP core keeps the
CAN state and CAN error counters over an internal reset cycle. An
external reset is not always possible, due to the shared reset with
the other CAN core. This caused the core not always be in Error Active
state when bringing up the controller.

Instead of always setting the CAN state to Error Active in
m_can_chip_config(), fix this by reading and decoding the Protocol
Status Regitser (PSR) and set the CAN state accordingly.

Fixes: e0d1f4816f ("can: m_can: add Bosch M_CAN controller support")
Reviewed-by: Markus Schneider-Pargmann <msp@baylibre.com>
Link: https://patch.msgid.link/20250929-m_can-fix-state-handling-v4-3-682b49b49d9a@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
2025-10-08 10:18:56 +02:00
arch Networking changes for 6.18. 2025-10-02 15:17:01 -07:00
block for-6.18/block-20250929 2025-10-02 10:16:56 -07:00
certs sign-file,extract-cert: use pkcs11 provider for OPENSSL MAJOR >= 3 2024-09-20 19:52:48 +03:00
crypto bpf-next-6.18 2025-09-30 17:58:11 -07:00
Documentation Networking changes for 6.18. 2025-10-02 15:17:01 -07:00
drivers can: m_can: m_can_chip_config(): bring up interface in correct state 2025-10-08 10:18:56 +02:00
fs for-6.18/block-20250929 2025-10-02 10:16:56 -07:00
include page_pool: Fix PP_MAGIC_MASK to avoid crashing on some 32-bit arches 2025-10-06 12:14:04 -07:00
init Kbuild updates for 6.18 2025-10-01 20:58:51 -07:00
io_uring Networking changes for 6.18. 2025-10-02 15:17:01 -07:00
ipc namespace-6.18-rc1 2025-09-29 11:20:29 -07:00
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LICENSES LICENSES: Replace the obsolete address of the FSF in the GFDL-1.2 2025-07-24 11:15:39 +02:00
mm Networking changes for 6.18. 2025-10-02 15:17:01 -07:00
net tcp: take care of zero tp->window_clamp in tcp_set_rcvlowat() 2025-10-06 13:08:48 -07:00
rust Networking changes for 6.18. 2025-10-02 15:17:01 -07:00
samples [GIT PULL for v6.18] media updates 2025-10-02 13:13:26 -07:00
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security bitmap-for-6.18 2025-10-02 08:57:03 -07:00
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tools selftests: drv-net: make linters happy with our imports 2025-10-07 12:12:44 +02:00
usr gen_init_cpio: add -a <data_align> as reflink optimization 2025-08-20 16:02:56 -07:00
virt Merge tag 'kvm-x86-no_assignment-6.17' of https://github.com/kvm-x86/linux into HEAD 2025-07-29 08:36:42 -04:00
.clang-format Linux 6.15-rc5 2025-05-06 16:39:25 +10:00
.clippy.toml rust: clean Rust 1.88.0's warning about clippy::disallowed_macros configuration 2025-05-07 00:11:47 +02:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.editorconfig .editorconfig: remove trim_trailing_whitespace option 2024-06-13 16:47:52 +02:00
.get_maintainer.ignore MAINTAINERS: remove Alyssa Rosenzweig 2025-09-18 21:17:31 +02:00
.gitattributes .gitattributes: set diff driver for Rust source code files 2023-05-31 17:48:25 +02:00
.gitignore .gitignore: ignore compile_commands.json globally 2025-08-12 15:53:55 -07:00
.mailmap Networking changes for 6.18. 2025-10-02 15:17:01 -07:00
.pylintrc docs: add a .pylintrc file with sys path for docs scripts 2025-04-09 12:10:33 -06:00
.rustfmt.toml rust: add .rustfmt.toml 2022-09-28 09:02:20 +02:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: Delete inactive maintainers from AF_XDP 2025-09-25 13:18:22 +02:00
Kbuild sched: Make migrate_{en,dis}able() inline 2025-09-25 09:57:16 +02:00
Kconfig io_uring: Rename KConfig to Kconfig 2025-02-19 14:53:27 -07:00
MAINTAINERS Networking changes for 6.18. 2025-10-02 15:17:01 -07:00
Makefile Kbuild updates for 6.18 2025-10-01 20:58:51 -07:00
README README: Fix spelling 2024-03-18 03:36:32 -06:00

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.