Vincent Mailhol e8060f08cd can: netlink: add can_priv::do_get_auto_tdcv() to retrieve tdcv from device ... Some CAN device can measure the TDCV (Transmission Delay Compensation Value) automatically for each transmitted CAN frames. A callback function do_get_auto_tdcv() is added to retrieve that value. This function is used only if CAN_CTRLMODE_TDC_AUTO is enabled (if CAN_CTRLMODE_TDC_MANUAL is selected, the TDCV value is provided by the user). If the device does not support reporting of TDCV, do_get_auto_tdcv() should be set to NULL and TDCV will not be reported by the netlink interface. On success, do_get_auto_tdcv() shall return 0. If the value can not be measured by the device, for example because network is down or because no frames were transmitted yet, can_priv::do_get_auto_tdcv() shall return a negative error code (e.g. -EINVAL) to signify that the value is not yet available. In such cases, TDCV is not reported by the netlink interface. Link: https://lore.kernel.org/all/20210918095637.20108-6-mailhol.vincent@wanadoo.fr CC: Stefan Mätje <stefan.maetje@esd.eu> Signed-off-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>		2021-10-24 16:24:29 +02:00
..
dev	can: remove obsolete get_canfd_dlc() macro	2020-11-20 09:43:30 +01:00
platform	can: flexcan: add platform data header	2021-07-25 11:36:29 +02:00
bittiming.h	can: bittiming: change can_calc_tdco()'s prototype to not directly modify priv	2021-10-24 16:24:29 +02:00
can-ml.h	net: introduce CAN specific pointer in the struct net_device	2021-02-24 14:32:15 -08:00
core.h	can: remove obsolete version strings	2020-10-12 10:06:39 +02:00
dev.h	can: netlink: add can_priv::do_get_auto_tdcv() to retrieve tdcv from device	2021-10-24 16:24:29 +02:00
led.h	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500	2019-06-19 17:09:55 +02:00
length.h	can: length: can_skb_get_frame_len(): introduce function to get data length of frame in data link layer	2021-01-14 08:43:42 +01:00
rx-offload.h	can: rx-offload: can_rx_offload_threaded_irq_finish(): add new function to be called from threaded interrupt	2021-07-25 11:36:25 +02:00
skb.h	can: dev: can_free_echo_skb(): extend to return can frame length	2021-03-30 11:14:28 +02:00