ARM64: simplify cpu_read_bootcpu_ops using OF/DT helper
Once the cpu_logical_map for any logical cpu is populated with the corresponding physical identifier(i.e. mpidr), it's device node can be retrieved using the DT helper 'of_get_cpu_node'. Currently the device tree parsing code to get boot cpu node is duplicated in 'cpu_read_bootcpu_ops'. This patch replaces the code parsing the device tree for the boot cpu with of_get_cpu_node. Signed-off-by: Sudeep KarkadaNagesha <sudeep.karkadanagesha@arm.com> Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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@ -78,22 +78,10 @@ int __init cpu_read_ops(struct device_node *dn, int cpu)
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void __init cpu_read_bootcpu_ops(void)
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{
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struct device_node *dn = NULL;
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u64 mpidr = cpu_logical_map(0);
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while ((dn = of_find_node_by_type(dn, "cpu"))) {
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u64 hwid;
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const __be32 *prop;
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prop = of_get_property(dn, "reg", NULL);
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if (!prop)
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continue;
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hwid = of_read_number(prop, of_n_addr_cells(dn));
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if (hwid == mpidr) {
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cpu_read_ops(dn, 0);
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of_node_put(dn);
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return;
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}
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struct device_node *dn = of_get_cpu_node(0, NULL);
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if (!dn) {
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pr_err("Failed to find device node for boot cpu\n");
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return;
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}
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cpu_read_ops(dn, 0);
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}
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