forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
44 lines
1.3 KiB
44 lines
1.3 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
|
/* Copyright (c) 2020 Pengutronix, Marc Kleine-Budde <[email protected]> |
|
*/ |
|
|
|
#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 */
|
|
|