From af1a266670d040d2f4083ff309d732d648afba2a Mon Sep 17 00:00:00 2001
From: Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com>
Date: Tue, 10 Oct 2023 14:33:42 +0000
Subject: Add submodule dependency files
Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
---
roms/u-boot/board/google/gru/gru.c | 56 ++++++++++++++++++++++++++++++++++++++
1 file changed, 56 insertions(+)
create mode 100644 roms/u-boot/board/google/gru/gru.c
(limited to 'roms/u-boot/board/google/gru/gru.c')
diff --git a/roms/u-boot/board/google/gru/gru.c b/roms/u-boot/board/google/gru/gru.c
new file mode 100644
index 000000000..23080c179
--- /dev/null
+++ b/roms/u-boot/board/google/gru/gru.c
@@ -0,0 +1,56 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2018 Google
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <init.h>
+
+#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
+
+#ifndef CONFIG_SPL_BUILD
+int board_early_init_r(void)
+{
+ struct udevice *clk;
+ int ret;
+
+ /*
+ * This init is done in SPL, but when chain-loading U-Boot SPL will
+ * have been skipped. Allow the clock driver to check if it needs
+ * setting up.
+ */
+ ret = uclass_get_device_by_driver(UCLASS_CLK,
+ DM_DRIVER_GET(clk_rk3399), &clk);
+ if (ret) {
+ debug("%s: CLK init failed: %d\n", __func__, ret);
+ return ret;
+ }
+
+ return 0;
+}
+#endif
--
cgit