ARC: [DeviceTree] Basic support
This is minimal infrastructure needed for devicetree work.
It uses an a sample "skeleton" devicetree - embedded in kernel image -
to print the board, manufacturer by parsing the top-level "compatible"
string.
As of now we don't need any additional "board" specific "machine_desc".
TODO: support interpreting the command line as boot-loader passed dtb
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: devicetree-discuss@lists.ozlabs.org
Cc: Rob Herring <rob.herring@calxeda.com>
Cc: James Hogan <james.hogan@imgtec.com>
Reviewed-by: Rob Herring <rob.herring@calxeda.com>
Reviewed-by: James Hogan <james.hogan@imgtec.com>
diff --git a/arch/arc/kernel/setup.c b/arch/arc/kernel/setup.c
index 82ac206..27aebd6 100644
--- a/arch/arc/kernel/setup.c
+++ b/arch/arc/kernel/setup.c
@@ -13,6 +13,8 @@
#include <linux/console.h>
#include <linux/module.h>
#include <linux/cpu.h>
+#include <linux/of_fdt.h>
+#include <asm/sections.h>
#include <asm/arcregs.h>
#include <asm/tlb.h>
#include <asm/cache.h>
@@ -20,6 +22,7 @@
#include <asm/page.h>
#include <asm/irq.h>
#include <asm/arcregs.h>
+#include <asm/prom.h>
#define FIX_PTR(x) __asm__ __volatile__(";" : "+r"(x))
@@ -57,6 +60,8 @@
void __init setup_arch(char **cmdline_p)
{
+ int rc;
+
#ifdef CONFIG_CMDLINE_UBOOT
/* Make sure that a whitespace is inserted before */
strlcat(command_line, " ", sizeof(command_line));
@@ -71,6 +76,8 @@
strlcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
*cmdline_p = command_line;
+ rc = setup_machine_fdt(__dtb_start);
+
/* To force early parsing of things like mem=xxx */
parse_early_param();
@@ -81,6 +88,8 @@
setup_arch_memory();
+ unflatten_device_tree();
+
/* Can be issue if someone passes cmd line arg "ro"
* But that is unlikely so keeping it as it is
*/
