diff options
Diffstat (limited to 'board/google/gru/gru.c')
| -rw-r--r-- | board/google/gru/gru.c | 24 |
1 files changed, 20 insertions, 4 deletions
diff --git a/board/google/gru/gru.c b/board/google/gru/gru.c index b116b1a549..b6b4f19d84 100644 --- a/board/google/gru/gru.c +++ b/board/google/gru/gru.c @@ -5,12 +5,28 @@ #include <common.h> -int board_init(void) +#ifdef CONFIG_SPL_BUILD +/* provided to defeat compiler optimisation in board_init_f() */ +void gru_dummy_function(int i) { - return 0; } -/* provided to defeat compiler optimisation in board_init_f() */ -void gru_dummy_function(int i) +int board_early_init_f(void) { +# ifdef CONFIG_TARGET_CHROMEBOOK_BOB + int sum, i; + + /* + * Add a delay and ensure that the compiler does not optimise this out. + * This is needed since the power rails tail a while to turn on, and + * we get garbage serial output otherwise. + */ + sum = 0; + for (i = 0; i < 150000; i++) + sum += i; + gru_dummy_function(sum); +#endif /* CONFIG_TARGET_CHROMEBOOK_BOB */ + + return 0; } +#endif |