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[147.32.90.2]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-47a8f703efesm72603235e9.16.2025.12.15.12.05.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 15 Dec 2025 12:05:07 -0800 (PST) From: =?UTF-8?q?Maty=C3=A1=C5=A1=20Bobek?= To: qemu-devel@nongnu.org, Matyas Bobek , Pavel Pisa , Bernhard Beschow Cc: Marc Kleine-Budde , Oliver Hartkopp , Nikita Ostrenkov , Peter Maydell , =?UTF-8?q?Maty=C3=A1=C5=A1=20Bobek?= Subject: [PATCH v1 6/6] docs/arm/sabrelite: Mention FlexCAN support Date: Mon, 15 Dec 2025 21:03:15 +0100 Message-ID: X-Mailer: git-send-email 2.52.0 In-Reply-To: References: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2a00:1450:4864:20::32e; envelope-from=matyas.bobek@gmail.com; helo=mail-wm1-x32e.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Also added example command line usage of the Sabrelite board with FlexCAN controllers. Signed-off-by: Matyáš Bobek --- docs/system/arm/sabrelite.rst | 1 + docs/system/devices/can.rst | 20 ++++++++++++++++++++ 2 files changed, 21 insertions(+) diff --git a/docs/system/arm/sabrelite.rst b/docs/system/arm/sabrelite.rst index 4ccb0560af..d3a3c01dd6 100644 --- a/docs/system/arm/sabrelite.rst +++ b/docs/system/arm/sabrelite.rst @@ -24,6 +24,7 @@ The SABRE Lite machine supports the following devices: * 4 SDHC storage controllers * 4 USB 2.0 host controllers * 5 ECSPI controllers + * 2 FlexCAN CAN controllers * 1 SST 25VF016B flash Please note above list is a complete superset the QEMU SABRE Lite machine can diff --git a/docs/system/devices/can.rst b/docs/system/devices/can.rst index 09121836fd..5f21c01550 100644 --- a/docs/system/devices/can.rst +++ b/docs/system/devices/can.rst @@ -173,6 +173,26 @@ The test can also be run the other way around, generating messages in the guest system and capturing them in the host system. Other combinations are also possible. +Examples on how to use CAN emulation for FlexCAN on SabreLite board +------------------------------------------------------------------- +FlexCANs are connected to QEMU CAN buses by passing the bus IDs as machine properties: +* property ``canbus0`` for connecting ``flexcan1`` +* property ``canbus1`` for connecting ``flexcan2`` +Note that upstream Linux SabreLite DTs have only a single FlexCAN (``flexcan1``) enabled. + +An example command to run QEMU emulating a Sabrelite development board +with both FlexCANs connected to a single QEMU CAN bus (called ``qcan0``), +bridged to host system ``can0`` interface:: + + qemu-system-arm -M sabrelite -smp 4 -m 1G \ + -object can-bus,id=qcan0 \ + -machine canbus0=qcan0 -machine canbus1=qcan0 \ + -object can-host-socketcan,if=can0,canbus=qcan0,id=qcan0-socketcan \ + -kernel ... -dtb ... -initrd ... + +Note that in the Linux guest, bitrate for the FlexCAN device is ignored, +but needs to be set via the ``ip`` command. + Links to other resources ------------------------ -- 2.52.0