diff options
Diffstat (limited to 'board')
| -rw-r--r-- | board/theobroma-systems/jaguar_rk3588/jaguar_rk3588.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/board/theobroma-systems/jaguar_rk3588/jaguar_rk3588.c b/board/theobroma-systems/jaguar_rk3588/jaguar_rk3588.c index a6d44f10db3..3f484646701 100644 --- a/board/theobroma-systems/jaguar_rk3588/jaguar_rk3588.c +++ b/board/theobroma-systems/jaguar_rk3588/jaguar_rk3588.c @@ -51,3 +51,22 @@ int rockchip_early_misc_init_r(void) return 0; } + +#define GPIO0B7_PU_EN BIT(15) + +void spl_board_init(void) +{ + /* + * GPIO0_B7 is routed to CAN TX. This SoC pin has a pull-down per default. + * So on power-up, we block the CAN bus with a dominant zero. We want to keep + * this blocking time to a minimum, so we want to get this pin high in SPL. + * + * The CAN driver in Linux disables the pull-down and sets the pin to + * output high. We don't have a CAN driver in U-Boot and don't need one, + * so we just use the easiest way to get the pin high, which is setting a + * pull-up. + */ + struct rk3588_pmu2_ioc * const ioc = (void *)PMU2_IOC_BASE; + + rk_setreg(&ioc->gpio0b_p, GPIO0B7_PU_EN); +} |