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drivers: can: stm32: fix bus-speed

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Set the prescaler in register BTR according to the configured bitrate in DTS.
This bug appeared in commit 8b6c1bd4b7

Signed-off-by: Julien D'Ascenzio <julien.dascenzio@paratronic.fr>
This commit is contained in:
Julien D'Ascenzio 2021-01-07 18:39:22 +01:00 • committed by Anas Nashif
commit f1963dd599
1 changed files with 5 additions and 3 deletions
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8
drivers/can/can_stm32.c
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@ -374,9 +374,11 @@ int can_stm32_set_timing(const struct device *dev,
can->BTR &= ~(CAN_BTR_BRP_Msk | CAN_BTR_TS1_Msk |
CAN_BTR_TS2_Msk | CAN_BTR_SJW_Msk);
can->BTR |= (((timing->phase_seg1 - 1) & 0x0F) << CAN_BTR_TS1_Pos) |
(((timing->phase_seg2 - 1) & 0x07) << CAN_BTR_TS2_Pos) |
(((timing->sjw - 1) & 0x07) << CAN_BTR_SJW_Pos);
can->BTR |=
(((timing->phase_seg1 - 1) << CAN_BTR_TS1_Pos) & CAN_BTR_TS1_Msk) |
(((timing->phase_seg2 - 1) << CAN_BTR_TS2_Pos) & CAN_BTR_TS2_Msk) |
(((timing->sjw - 1) << CAN_BTR_SJW_Pos) & CAN_BTR_SJW_Msk) |
(((timing->prescaler - 1) << CAN_BTR_BRP_Pos) & CAN_BTR_BRP_Msk);
ret = can_leave_init_mode(can);
if (ret) {