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| author | Rob Herring <rob.herring@calxeda.com> | 2013-08-26 16:47:40 +0200 |
|---|---|---|
| committer | Rob Herring <rob.herring@calxeda.com> | 2013-10-09 18:38:07 +0200 |
| commit | 0288ffcbfdf9b8656e7320c24caa1e4c1d498287 (patch) | |
| tree | a519e3005e4987b91227546c6e1b46ab1845532d /drivers | |
| parent | metag: use unflatten_and_copy_device_tree (diff) | |
| download | linux-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')
| -rw-r--r-- | drivers/of/fdt.c | 26 |
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 * |