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This patch introduces 3 new functions implementing support for ethtool access to the CAN channel ID of all USB CAN network interfaces managed by the driver. With this patch, it is possible to read/write the CAN channel ID from/to the EEPROM via the ethtool interface. The CAN channel ID is a user-configurable device identifier that can be set individually for each CAN interface of a PEAK USB device. Depending on the device, the identifier has a length of 8 or 32 bit. The identifier is stored in the non-volatile memory of the device. The identifier of a CAN interface can be read/written as an 8 or 32 bit byte string in native (little-endian) byte order, where the length depends on the device type. Signed-off-by: Stephane Grosjean <s.grosjean@peak-system.com> Signed-off-by: Lukas Magel <lukas.magel@posteo.net> Link: https://lore.kernel.org/all/20230116200932.157769-6-lukas.magel@posteo.net Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Linux kernel
============
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