diff options
Diffstat (limited to 'arch/arm/mach-mx6/board-mx6q_sabreauto.c')
| -rw-r--r-- | arch/arm/mach-mx6/board-mx6q_sabreauto.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/arm/mach-mx6/board-mx6q_sabreauto.c b/arch/arm/mach-mx6/board-mx6q_sabreauto.c index e1df8723146c..7c1fadaf1d47 100644 --- a/arch/arm/mach-mx6/board-mx6q_sabreauto.c +++ b/arch/arm/mach-mx6/board-mx6q_sabreauto.c @@ -1116,6 +1116,15 @@ static int flexcan1_en; static void mx6q_flexcan_switch(void) { if (flexcan0_en || flexcan1_en) { + /* + * The transceiver TJA1041A on sabreauto RevE baseboard will + * fail to transit to Normal state if EN/STBY is high by default + * after board power up. So we set the EN/STBY initial state to low + * first then to high to guarantee the state transition successfully. + */ + gpio_set_value_cansleep(SABREAUTO_CAN_EN, 0); + gpio_set_value_cansleep(SABREAUTO_CAN_STBY, 0); + gpio_set_value_cansleep(SABREAUTO_CAN_EN, 1); gpio_set_value_cansleep(SABREAUTO_CAN_STBY, 1); /* Enable STEER pin if CAN1 interface is required. |