rockchip: rk3399: move chromebook bob specific flow to its board file
Add a board_early_init_f() in board_init_f() and move the board
specific init code into its own board file.
Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/board/google/gru/gru.c b/board/google/gru/gru.c
index b116b1a..c2895e1 100644
--- a/board/google/gru/gru.c
+++ b/board/google/gru/gru.c
@@ -10,7 +10,28 @@
return 0;
}
+#ifdef CONFIG_SPL_BUILD
/* 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