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Marc Kleine-Budde <mkl@pengutronix.de> says: after noticing that the gs_usb firmware sends timestamps on the TX, too, I updated the driver and squashed the 2nd patch. Also added proper endianness handling to gs_usb_get_timestamp(). I allowed to add myself as Co-developed-by. Changes since v2: https://lore.kernel.org/all/20220827092545.2971240-1-mkl@pengutronix.de - new patch 1/2: use common spelling of GS_USB in macros - squashed both old patches into now 2/2 - use GS_USB instead of GSUSB in macros - gs_usb_get_timestamp(): renamed from gs_usb_get_sof_timestamp() - gs_usb_get_timestamp(): take care of endianness - gs_usb_skb_set_timestamp(): renamed from gs_usb_set_timestamp() - gs_usb_set_timestamp(): add new function to add timestamp to skb from struct gs_host_frame - add support for TX timestamps - gs_can_eth_ioctl(): return -EOPNOTSUPP if device doesn't support GS_CAN_FEATURE_HW_TIMESTAMP - gs_usb_get_ts_info(): renamed from gs_usb_get_ts_info_hwts() - gs_usb_get_ts_info(): call can_ethtool_op_get_ts_info_hwts() if device supports GS_CAN_FEATURE_HW_TIMESTAMP, call ethtool_op_get_ts_info() otherwise Changes since v1: https://lore.kernel.org/all/20220826104629.2837024-1-mkl@pengutronix.de - add new includes sorted - adjust multi line comment style - don't use 1e6, but 1 * HZ_PER_MHZ, to fix sparse warning - use __le32 instead of u32 in struct classic_can_ts and canfd_ts - place _ts in front of _quirk in union in struct gs_host_frame - gs_usb_get_sof_timestamp(): pass "const struct gs_can *dev" as 1st argument, not struct net_device *netdev, simplify return handling - gs_usb_timestamp_init(), gs_usb_timestamp_stop(), gs_usb_get_ts_info_hwts(): make static - gs_usb_timestamp_init(): increase cc->shift to maximize precision - fix long lines, remove braces {} for single statement blocks - gs_can_open(): move check for GS_CAN_FEATURE_HW_TIMESTAMP after all ctrlmode checks - gs_can_open(): move start polling sof timestamp after kfree(dm) - gs_can_close(): move stop polling sof timestamp to be symmetric with respect to gs_can_open() - gs_usb_probe(): make calculation of dev->hf_size_rx more robust Link: https://lore.kernel.org/all/20220827221548.3291393-1-mkl@pengutronix.de Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.