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[U-Boot,08/20] x86: Add support for CONFIG_OF_CONTROL

Message ID 1351978902-23719-9-git-send-email-sjg@chromium.org
State Accepted, archived
Delegated to: Simon Glass
Headers show

Commit Message

Simon Glass Nov. 3, 2012, 9:41 p.m. UTC 
From: Gabe Black <gabeblack@chromium.org>

Allow a device tree to be provided through the standard mechanisms.

Signed-off-by: Gabe Black <gabeblack@google.com>
Signed-off-by: Simon Glass <sjg@chromium.org>
---
 arch/x86/lib/board.c        |    7 +++++++
 arch/x86/lib/init_helpers.c |   29 +++++++++++++++++++++++++++++
 2 files changed, 36 insertions(+), 0 deletions(-)
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Patch

diff --git a/arch/x86/lib/board.c b/arch/x86/lib/board.c
index e0c5419..3093ea5 100644
--- a/arch/x86/lib/board.c
+++ b/arch/x86/lib/board.c
@@ -98,10 +98,17 @@  typedef int (init_fnc_t) (void);
 init_fnc_t *init_sequence_f[] = {
 	cpu_init_f,
 	board_early_init_f,
+#ifdef CONFIG_OF_CONTROL
+	find_fdt,
+	fdtdec_check_fdt,
+#endif
 	env_init,
 	init_baudrate_f,
 	serial_init,
 	console_init_f,
+#ifdef CONFIG_OF_CONTROL
+	prepare_fdt,
+#endif
 	dram_init_f,
 	calculate_relocation_address,
 
diff --git a/arch/x86/lib/init_helpers.c b/arch/x86/lib/init_helpers.c
index fc28af7..4a94d96 100644
--- a/arch/x86/lib/init_helpers.c
+++ b/arch/x86/lib/init_helpers.c
@@ -205,3 +205,32 @@  int init_func_spi(void)
 	puts("ready\n");
 	return 0;
 }
+
+#ifdef CONFIG_OF_CONTROL
+int find_fdt(void)
+{
+#ifdef CONFIG_OF_EMBED
+	/* Get a pointer to the FDT */
+	gd->fdt_blob = _binary_dt_dtb_start;
+#elif defined CONFIG_OF_SEPARATE
+	/* FDT is at end of image */
+	gd->fdt_blob = (void *)(_end_ofs + _TEXT_BASE);
+#endif
+	/* Allow the early environment to override the fdt address */
+	gd->fdt_blob = (void *)getenv_ulong("fdtcontroladdr", 16,
+						(uintptr_t)gd->fdt_blob);
+
+	return 0;
+}
+
+int prepare_fdt(void)
+{
+	/* For now, put this check after the console is ready */
+	if (fdtdec_prepare_fdt()) {
+		panic("** CONFIG_OF_CONTROL defined but no FDT - please see "
+			"doc/README.fdt-control");
+	}
+
+	return 0;
+}
+#endif