kernel/linux.git/drivers/net/can/flexcan, branch v6.12.80

can: flexcan: add NXP S32G2/S32G3 SoC support

2025-04-20T08:15:18+00:00

[ Upstream commit 8503a4b1a24d32e95f3a233062e8f1dc0b2052bd ] Add device type data for S32G2/S32G3 SoC. FlexCAN module from S32G2/S32G3 is similar with i.MX SoCs, but interrupt management is different. On S32G2/S32G3 SoC, there are separate interrupts for state change, bus errors, Mailboxes 0-7 and Mailboxes 8-127 respectively. In order to handle this FlexCAN hardware particularity, first reuse the 'FLEXCAN_QUIRK_NR_IRQ_3' quirk provided by mcf5441x's irq handling support. Secondly, use the newly introduced 'FLEXCAN_QUIRK_SECONDARY_MB_IRQ' quirk which handles the case where two separate mailbox ranges are controlled by independent hardware interrupt lines. Signed-off-by: Ciprian Marian Costea Link: https://patch.msgid.link/20250113120704.522307-4-ciprianmarian.costea@oss.nxp.com Signed-off-by: Marc Kleine-Budde Signed-off-by: Sasha Levin

can: flexcan: Add quirk to handle separate interrupt lines for mailboxes

2025-04-20T08:15:18+00:00

[ Upstream commit 8c652cf030a769fbfc73cfc280ed3f1656343c35 ] Introduce 'FLEXCAN_QUIRK_SECONDARY_MB_IRQ' quirk to handle a FlexCAN hardware module integration particularity where two ranges of mailboxes are controlled by separate hardware interrupt lines. The same 'flexcan_irq' handler is used for both separate mailbox interrupt lines, with no other changes. Signed-off-by: Ciprian Marian Costea Reviewed-by: Vincent Mailhol Link: https://patch.msgid.link/20250113120704.522307-3-ciprianmarian.costea@oss.nxp.com [mkl: flexcan_open(): change order and free irq_secondary_mb first] Signed-off-by: Marc Kleine-Budde Signed-off-by: Sasha Levin

can: flexcan: disable transceiver during system PM

2025-03-28T21:03:29+00:00

commit 5a19143124be42900b3fbc9ada3c919632eb45eb upstream. During system PM, if no wakeup requirement, disable transceiver to save power. Fixes: 4de349e786a3 ("can: flexcan: fix resume function") Cc: stable@vger.kernel.org Reviewed-by: Frank Li Signed-off-by: Haibo Chen Link: https://patch.msgid.link/20250314110145.899179-2-haibo.chen@nxp.com [mkl: add newlines] Signed-off-by: Marc Kleine-Budde Signed-off-by: Greg Kroah-Hartman

can: flexcan: only change CAN state when link up in system PM

2025-03-28T21:03:29+00:00

commit fd99d6ed20234b83d65b9c5417794343577cf3e5 upstream. After a suspend/resume cycle on a down interface, it will come up as ERROR-ACTIVE. $ ip -details -s -s a s dev flexcan0 3: flexcan0: mtu 16 qdisc pfifo_fast state DOWN group default qlen 10 link/can promiscuity 0 allmulti 0 minmtu 0 maxmtu 0 can state STOPPED (berr-counter tx 0 rx 0) restart-ms 1000 $ sudo systemctl suspend $ ip -details -s -s a s dev flexcan0 3: flexcan0: mtu 16 qdisc pfifo_fast state DOWN group default qlen 10 link/can promiscuity 0 allmulti 0 minmtu 0 maxmtu 0 can state ERROR-ACTIVE (berr-counter tx 0 rx 0) restart-ms 1000 And only set CAN state to CAN_STATE_ERROR_ACTIVE when resume process has no issue, otherwise keep in CAN_STATE_SLEEPING as suspend did. Fixes: 4de349e786a3 ("can: flexcan: fix resume function") Cc: stable@vger.kernel.org Signed-off-by: Haibo Chen Link: https://patch.msgid.link/20250314110145.899179-1-haibo.chen@nxp.com Reported-by: Marc Kleine-Budde Closes: https://lore.kernel.org/all/20250314-married-polar-elephant-b15594-mkl@pengutronix.de [mkl: add newlines] Signed-off-by: Marc Kleine-Budde Signed-off-by: Greg Kroah-Hartman

can: Switch back to struct platform_driver::remove()

2024-09-11T07:37:16+00:00

After commit 0edb555a65d1 ("platform: Make platform_driver::remove() return void") .remove() is (again) the right callback to implement for platform drivers. Convert all can drivers to use .remove(), with the eventual goal to drop struct platform_driver::remove_new(). As .remove() and .remove_new() have the same prototypes, conversion is done by just changing the structure member name in the driver initializer. Signed-off-by: Uwe Kleine-König Link: https://patch.msgid.link/20240909072742.381003-2-u.kleine-koenig@baylibre.com Signed-off-by: Marc Kleine-Budde

can: flexcan: add wakeup support for imx95

2024-08-05T14:45:45+00:00

iMX95 defines a bit in GPR that sets/unsets the IPG_STOP signal to the FlexCAN module, controlling its entry into STOP mode. Wakeup should work even if FlexCAN is in STOP mode. Due to iMX95 architecture design, the A-Core cannot access GPR; only the system manager (SM) can configure GPR. To support the wakeup feature, follow these steps: - For suspend: 1) During Linux suspend, when CAN suspends, do nothing for GPR and keep CAN-related clocks on. 2) In ATF, check whether CAN needs to support wakeup; if yes, send a request to SM through the SCMI protocol. 3) In SM, configure the GPR and unset IPG_STOP. 4) A-Core suspends. - For wakeup and resume: 1) A-Core wakeup event arrives. 2) In SM, deassert IPG_STOP. 3) Linux resumes. Add a new fsl_imx95_devtype_data and FLEXCAN_QUIRK_SETUP_STOP_MODE_SCMI to reflect this. Reviewed-by: Han Xu Signed-off-by: Haibo Chen Reviewed-by: Vincent Mailhol Signed-off-by: Frank Li Link: https://lore.kernel.org/all/20240731-flexcan-v4-2-82ece66e5a76@nxp.com Signed-off-by: Marc Kleine-Budde

net: can: Use device_get_match_data()

2024-01-19T14:08:53+00:00

Use preferred device_get_match_data() instead of of_match_device() to get the driver match data. With this, adjust the includes to explicitly include the correct headers. Error checking for matching and match data was not necessary as matching is always successful if we're already in probe and the match tables always have data pointers. Signed-off-by: Rob Herring

can: flexcan: remove the auto stop mode for IMX93

2023-10-06T10:54:33+00:00

IMX93 A0 chip involve the internal q-channel handshake in LPCG and CCM to automatically handle the Flex-CAN IPG STOP signal. Only after FLEX-CAN enter stop mode then can support the self-wakeup feature. But meet issue when do the continue system PM stress test. When config the CAN as wakeup source, the first time after system suspend, any data on CAN bus can wakeup the system, this is as expect. But the second time when system suspend, data on CAN bus can't wakeup the system. If continue this test, we find in odd time system enter suspend, CAN can wakeup the system, but in even number system enter suspend, CAN can't wakeup the system. IC find a bug in the auto stop mode logic, and can't fix it easily. So for the new imx93 A1, IC drop the auto stop mode and involve the GPR to support stop mode (used before). IC define a bit in GPR which can trigger the IPG STOP signal to Flex-CAN, let it go into stop mode. And NXP claim to drop IMX93 A0, and only support IMX93 A1. So this patch remove the auto stop mode, and add flag FLEXCAN_QUIRK_SETUP_STOP_MODE_GPR to imx93. Signed-off-by: Haibo Chen Link: https://lore.kernel.org/all/20230726112458.3524165-2-haibo.chen@nxp.com Signed-off-by: Marc Kleine-Budde

can: flexcan: fix the return value handle for platform_get_irq()

2023-07-31T08:12:56+00:00

There is no possible for platform_get_irq() to return 0 and the return value of platform_get_irq() is more sensible to show the error reason. Signed-off-by: Ruan Jinjie Link: https://lore.kernel.org/all/20230731075252.359965-1-ruanjinjie@huawei.com Signed-off-by: Marc Kleine-Budde

can: rx-offload: rename rx_offload_get_echo_skb() -> can_rx_offload_get_echo_skb_queue_timestamp()

2023-07-28T07:45:24+00:00

Rename the rx_offload_get_echo_skb() function to can_rx_offload_get_echo_skb_queue_timestamp(), since it inserts the echo skb into the rx-offload queue sorted by timestamp. This is a preparation for adding can_rx_offload_get_echo_skb_queue_tail(), which adds the echo skb to the end of the queue. This is intended for devices that do not support timestamps. Link: https://lore.kernel.org/all/20230718-gs_usb-rx-offload-v2-1-716e542d14d5@pengutronix.de Signed-off-by: Marc Kleine-Budde