arm: use early_init_dt_scan

Convert arm to use new early_init_dt_scan function.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: linux-arm-kernel@lists.infradead.org

diff --git a/arch/arm/kernel/devtree.c b/arch/arm/kernel/devtree.c
index f35906b..e7ce175 100644 (file)
--- a/arch/arm/kernel/devtree.c
+++ b/arch/arm/kernel/devtree.c
@@ -183,7 +183,6 @@ bool arch_match_cpu_phys_id(int cpu, u64 phys_id)
  */
 const struct machine_desc * __init setup_machine_fdt(unsigned int dt_phys)
 {
-       struct boot_param_header *devtree;
        const struct machine_desc *mdesc, *mdesc_best = NULL;
        unsigned int score, mdesc_score = ~1;
        unsigned long dt_root;
@@ -196,17 +195,11 @@ const struct machine_desc * __init setup_machine_fdt(unsigned int dt_phys)
        mdesc_best = &__mach_desc_GENERIC_DT;
 #endif
 
-       if (!dt_phys)
+       if (!dt_phys || !early_init_dt_scan(phys_to_virt(dt_phys)))
                return NULL;
 
-       devtree = phys_to_virt(dt_phys);
-
-       /* check device tree validity */
-       if (be32_to_cpu(devtree->magic) != OF_DT_HEADER)
-               return NULL;
 
        /* Search the mdescs for the 'best' compatible value match */
-       initial_boot_params = devtree;
        dt_root = of_get_flat_dt_root();
        for_each_machine_desc(mdesc) {
                score = of_flat_dt_match(dt_root, mdesc->dt_compat);
@@ -240,13 +233,6 @@ const struct machine_desc * __init setup_machine_fdt(unsigned int dt_phys)
                model = "<unknown>";
        pr_info("Machine: %s, model: %s\n", mdesc_best->name, model);
 
-       /* 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);
-
        /* Change machine number to match the mdesc we're using */
        __machine_arch_type = mdesc_best->nr;