diff options
Diffstat (limited to 'common/system_common.c')
| -rw-r--r-- | common/system_common.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/common/system_common.c b/common/system_common.c index d77d82070e..003bde2c29 100644 --- a/common/system_common.c +++ b/common/system_common.c @@ -16,6 +16,7 @@ #include "panic.h" #include "system.h" #include "task.h" +#include "timer.h" #include "uart.h" #include "util.h" #include "version.h" @@ -302,7 +303,25 @@ static void jump_to_image(uint32_t init_addr) * EC is not in read-only firmware. (This is not technically true if * jumping from RO -> RO, but that's not a meaningful use case...) */ +#ifdef BOARD_spring + int value; + + /* find whether we have a pull-up or a pull-down on the Silego side */ + value = gpio_get_level(GPIO_ENTERING_RW); + /* drive ENTERING_RW and ensure we are doing the proper edge */ + gpio_set_flags(GPIO_ENTERING_RW, GPIO_OUTPUT); + gpio_set_level(GPIO_ENTERING_RW, !value); + usleep(MSEC); + gpio_set_level(GPIO_ENTERING_RW, value); + usleep(MSEC); + /* + * the Silego chip has latched the edge, + * we are back in Hi-Z to save power. + */ + gpio_set_flags(GPIO_ENTERING_RW, GPIO_INPUT); +#else gpio_set_level(GPIO_ENTERING_RW, 1); +#endif /* Flush UART output unless the UART hasn't been initialized yet */ if (uart_init_done()) |