45 lines
1.3 KiB
C
45 lines
1.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/* Copyright (c) 2020 Pengutronix, Marc Kleine-Budde <kernel@pengutronix.de>
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*/
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#ifndef _CAN_BITTIMING_H
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#define _CAN_BITTIMING_H
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#include <linux/netdevice.h>
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#include <linux/can/netlink.h>
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#define CAN_SYNC_SEG 1
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#ifdef CONFIG_CAN_CALC_BITTIMING
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int can_calc_bittiming(struct net_device *dev, struct can_bittiming *bt,
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const struct can_bittiming_const *btc);
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#else /* !CONFIG_CAN_CALC_BITTIMING */
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static inline int
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can_calc_bittiming(struct net_device *dev, struct can_bittiming *bt,
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const struct can_bittiming_const *btc)
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{
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netdev_err(dev, "bit-timing calculation not available\n");
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return -EINVAL;
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}
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#endif /* CONFIG_CAN_CALC_BITTIMING */
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int can_get_bittiming(struct net_device *dev, struct can_bittiming *bt,
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const struct can_bittiming_const *btc,
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const u32 *bitrate_const,
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const unsigned int bitrate_const_cnt);
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/*
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* can_bit_time() - Duration of one bit
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*
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* Please refer to ISO 11898-1:2015, section 11.3.1.1 "Bit time" for
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* additional information.
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*
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* Return: the number of time quanta in one bit.
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*/
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static inline unsigned int can_bit_time(const struct can_bittiming *bt)
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{
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return CAN_SYNC_SEG + bt->prop_seg + bt->phase_seg1 + bt->phase_seg2;
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}
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#endif /* !_CAN_BITTIMING_H */
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