kernel/linux.git/drivers/net/can/m_can, branch master

can: m_can: m_can_get_berr_counter(): don't wake up controller if interface is down

2025-10-17T13:17:19+00:00

If the interface is down, the CAN controller might be powered down, the clock disabled, and/or it's external reset asserted. Don't wake up the controller to read the CAN bus error counters, if the interface is down. Reviewed-by: Markus Schneider-Pargmann Link: https://patch.msgid.link/20251008-m_can-cleanups-v1-7-1784a18eaa84@pengutronix.de Signed-off-by: Marc Kleine-Budde

can: m_can: m_can_tx_submit(): remove unneeded sanity checks

2025-10-17T13:17:13+00:00

m_can_tx_submit() is only called for peripheral devices. So remove the sanity check. Link: https://patch.msgid.link/20251008-m_can-cleanups-v1-6-1784a18eaa84@pengutronix.de Signed-off-by: Marc Kleine-Budde

can: m_can: m_can_class_register(): remove error message in case devm_kzalloc() fails

2025-10-17T13:17:08+00:00

If devm_kzalloc() fails, it already outputs an error message. Remove the error message from m_can_class_register() accordingly. Link: https://patch.msgid.link/20251008-m_can-cleanups-v1-5-1784a18eaa84@pengutronix.de Signed-off-by: Marc Kleine-Budde

can: m_can: m_can_interrupt_enable(): use m_can_write() instead of open coding it

2025-10-17T13:17:03+00:00

As everywhere else in the driver, use m_can_write() instead of open coding it. Link: https://patch.msgid.link/20251008-m_can-cleanups-v1-4-1784a18eaa84@pengutronix.de Signed-off-by: Marc Kleine-Budde

net: m_can: convert dev_{dbg,info,err} -> netdev_{dbg,info,err}

2025-10-17T13:16:59+00:00

To ease debugging use the netdev_{dbg,info,err}() functions instead of dev_{dbg,info,err}. Link: https://patch.msgid.link/20251008-m_can-cleanups-v1-3-1784a18eaa84@pengutronix.de Signed-off-by: Marc Kleine-Budde

can: m_can: hrtimer_callback(): rename to m_can_polling_timer()

2025-10-17T13:16:51+00:00

The original use of struct m_can_classdev::hrtimer was to support polling for devices without IRQ, with the timer function called hrtimer_callback(). Commit 07f25091ca02 ("can: m_can: Implement receive coalescing") uses the hrtimer for software-supported IRQ coalescence, with the timer function called m_can_coalescing_timer(). To improve the readability of the driver, rename hrtimer_callback() to m_can_polling_timer(), which better describes the functionality. Link: https://patch.msgid.link/20251008-m_can-cleanups-v1-2-1784a18eaa84@pengutronix.de Signed-off-by: Marc Kleine-Budde

can: m_can: m_can_init_ram(): make static

2025-10-17T13:16:50+00:00

Since commit eaacfeaca7ad ("can: m_can: Call the RAM init directly from m_can_chip_config") m_can_init_ram() is not used outside of m_can.c. Mark as static and remove the EXPORT_SYMBOL_GPL(). Link: https://patch.msgid.link/20251008-m_can-cleanups-v1-1-1784a18eaa84@pengutronix.de Signed-off-by: Marc Kleine-Budde

can: m_can: Support pinctrl wakeup state

2025-10-17T09:02:28+00:00

TI AM62x SoC requires a wakeup flag being set in pinctrl when mcan pins act as a wakeup source. Add support to select the wakeup state if WOL is enabled. Signed-off-by: Markus Schneider-Pargmann (TI.com) Link: https://patch.msgid.link/20251001-topic-mcan-wakeup-source-v6-12-v10-4-4ab508ac5d1e@baylibre.com Signed-off-by: Marc Kleine-Budde

can: m_can: Return ERR_PTR on error in allocation

2025-10-17T09:02:28+00:00

We have more detailed error values available, return them in the core driver and the calling drivers to return proper errors to callers. Reviewed-by: Vincent Mailhol Reviewed-by: Dhruva Gole Reviewed-by: Kendall Willis Signed-off-by: Markus Schneider-Pargmann (TI.com) Link: https://patch.msgid.link/20251001-topic-mcan-wakeup-source-v6-12-v10-3-4ab508ac5d1e@baylibre.com Signed-off-by: Marc Kleine-Budde

can: m_can: Map WoL to device_set_wakeup_enable

2025-10-17T09:02:28+00:00

In some devices the pins of the m_can module can act as a wakeup source. This patch helps do that by connecting the PHY_WAKE WoL option to device_set_wakeup_enable. By marking this device as being wakeup enabled, this setting can be used by platform code to decide which sleep or poweroff mode to use. Also this prepares the driver for the next patch in which the pinctrl settings are changed depending on the desired wakeup source. Reviewed-by: Vincent Mailhol Reviewed-by: Kendall Willis Signed-off-by: Markus Schneider-Pargmann (TI.com) Link: https://patch.msgid.link/20251001-topic-mcan-wakeup-source-v6-12-v10-2-4ab508ac5d1e@baylibre.com Signed-off-by: Marc Kleine-Budde