can: kvaser_usb: leaf: Add hardware timestamp support to usbcan devices

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Add hardware timestamp support for all usbcan based devices (M16C).
The usbcan firmware is slightly different compared to the other Kvaser USB
interfaces:
  - The timestamp is provided by a 32-bit counter, with 10us resolution.
    Hence, the hardware timestamp will wrap after less than 12 hours.
  - Each Rx CAN or Tx ACK command only contains the 16-bits LSB of the
    timestamp counter.
  - The 16-bits MSB are sent in an asynchronous event (command), if any
    change occurred in the MSB since the last event.

Signed-off-by: Jimmy Assarsson <extja@kvaser.com>
Reviewed-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Link: https://lore.kernel.org/all/20240701154936.92633-13-extja@kvaser.com
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

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Jimmy Assarsson 2024-07-01 17:49:33 +02:00 • committed by Marc Kleine-Budde

parent c644c9698d

commit 0aa639d3b3

2 changed files with 14 additions and 1 deletions

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3

drivers/net/can/usb/kvaser_usb/kvaser_usb_core.c

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12

drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c

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