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authorRob Herring <rob.herring@calxeda.com>2013-08-26 16:47:40 +0200
committerRob Herring <rob.herring@calxeda.com>2013-10-09 18:38:07 +0200
commit0288ffcbfdf9b8656e7320c24caa1e4c1d498287 (patch)
treea519e3005e4987b91227546c6e1b46ab1845532d /drivers/of
parentmetag: use unflatten_and_copy_device_tree (diff)
downloadlinux-0288ffcbfdf9b8656e7320c24caa1e4c1d498287.tar.xz
linux-0288ffcbfdf9b8656e7320c24caa1e4c1d498287.zip
of: Introduce common early_init_dt_scan
Most architectures scan the all the same items early in the FDT and none are really architecture specific. Create a common early_init_dt_scan to unify the early scan of root, memory, and chosen nodes in the flattened DT. Signed-off-by: Rob Herring <rob.herring@calxeda.com> Acked-by: Grant Likely <grant.likely@linaro.org>
Diffstat (limited to 'drivers/of')
-rw-r--r--drivers/of/fdt.c26
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index 51776166d2b0..bfbfda543768 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -785,6 +785,32 @@ void * __init __weak early_init_dt_alloc_memory_arch(u64 size, u64 align)
}
#endif
+bool __init early_init_dt_scan(void *params)
+{
+ if (!params)
+ return false;
+
+ /* Setup flat device-tree pointer */
+ initial_boot_params = params;
+
+ /* check device tree validity */
+ if (be32_to_cpu(initial_boot_params->magic) != OF_DT_HEADER) {
+ initial_boot_params = NULL;
+ return false;
+ }
+
+ /* Retrieve various information from the /chosen node */
+ of_scan_flat_dt(early_init_dt_scan_chosen, boot_command_line);
+
+ /* Initialize {size,address}-cells info */
+ of_scan_flat_dt(early_init_dt_scan_root, NULL);
+
+ /* Setup memory, calling early_init_dt_add_memory_arch */
+ of_scan_flat_dt(early_init_dt_scan_memory, NULL);
+
+ return true;
+}
+
/**
* unflatten_device_tree - create tree of device_nodes from flat blob
*