mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-18 08:35:03 +00:00
5a9d5ecd69
This patch moves the bittiming related code of the CAN device infrastructure into a separate file. Reviewed-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr> Link: https://lore.kernel.org/r/20210111141930.693847-4-mkl@pengutronix.de Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
44 lines
1.3 KiB
C
44 lines
1.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/* Copyright (c) 2020 Pengutronix, Marc Kleine-Budde <kernel@pengutronix.de>
|
|
*/
|
|
|
|
#ifndef _CAN_BITTIMING_H
|
|
#define _CAN_BITTIMING_H
|
|
|
|
#include <linux/netdevice.h>
|
|
#include <linux/can/netlink.h>
|
|
|
|
#define CAN_SYNC_SEG 1
|
|
|
|
#ifdef CONFIG_CAN_CALC_BITTIMING
|
|
int can_calc_bittiming(struct net_device *dev, struct can_bittiming *bt,
|
|
const struct can_bittiming_const *btc);
|
|
#else /* !CONFIG_CAN_CALC_BITTIMING */
|
|
static inline int
|
|
can_calc_bittiming(struct net_device *dev, struct can_bittiming *bt,
|
|
const struct can_bittiming_const *btc)
|
|
{
|
|
netdev_err(dev, "bit-timing calculation not available\n");
|
|
return -EINVAL;
|
|
}
|
|
#endif /* CONFIG_CAN_CALC_BITTIMING */
|
|
|
|
int can_get_bittiming(struct net_device *dev, struct can_bittiming *bt,
|
|
const struct can_bittiming_const *btc,
|
|
const u32 *bitrate_const,
|
|
const unsigned int bitrate_const_cnt);
|
|
|
|
/*
|
|
* can_bit_time() - Duration of one bit
|
|
*
|
|
* Please refer to ISO 11898-1:2015, section 11.3.1.1 "Bit time" for
|
|
* additional information.
|
|
*
|
|
* Return: the number of time quanta in one bit.
|
|
*/
|
|
static inline unsigned int can_bit_time(const struct can_bittiming *bt)
|
|
{
|
|
return CAN_SYNC_SEG + bt->prop_seg + bt->phase_seg1 + bt->phase_seg2;
|
|
}
|
|
|
|
#endif /* !_CAN_BITTIMING_H */
|