diff options
| -rw-r--r-- | src/mainboard/google/gru/bootblock.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/src/mainboard/google/gru/bootblock.c b/src/mainboard/google/gru/bootblock.c index bdc75dd589..1a99e8451c 100644 --- a/src/mainboard/google/gru/bootblock.c +++ b/src/mainboard/google/gru/bootblock.c @@ -14,10 +14,23 @@ * */ +#include <arch/io.h> #include <bootblock_common.h> +#include <soc/grf.h> +#include <console/console.h> void bootblock_mainboard_early_init(void) { + if (IS_ENABLED(CONFIG_DRIVERS_UART)) { + _Static_assert(CONFIG_CONSOLE_SERIAL_UART_ADDRESS == UART2_BASE, + "CONSOLE_SERIAL_UART should be UART2"); + + /* iomux: select gpio4c[4:3] as uart2 dbg port */ + write32(&rk3399_grf->iomux_uart2c, IOMUX_UART2C); + + /* grf soc_con7[11:10] use for uart2 select */ + write32(&rk3399_grf->soc_con7, UART2C_SEL); + } } void bootblock_mainboard_init(void) |