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| author | Sudeep KarkadaNagesha <sudeep.karkadanagesha@arm.com> | 2013-10-30 13:47:16 +0000 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2013-10-30 17:54:49 +0000 |
| commit | 248f0e7f5f0012fb9c1954e582196aa7f32a0c81 (patch) | |
| tree | f33927d4fc1540baa0a8e0c17a25ff676e6cff52 /arch/arm64/kernel/cpu_ops.c | |
| parent | 6e15d0e04bfeaa5662a289ee915273307326e45a (diff) | |
| download | linux-248f0e7f5f0012fb9c1954e582196aa7f32a0c81.tar.bz2 | |
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>
Diffstat (limited to 'arch/arm64/kernel/cpu_ops.c')
| -rw-r--r-- | arch/arm64/kernel/cpu_ops.c | 22 |
1 files changed, 5 insertions, 17 deletions
diff --git a/arch/arm64/kernel/cpu_ops.c b/arch/arm64/kernel/cpu_ops.c index aa0c9e78dbe1..e2ba274612cf 100644 --- a/arch/arm64/kernel/cpu_ops.c +++ b/arch/arm64/kernel/cpu_ops.c @@ -78,22 +78,10 @@ int __init cpu_read_ops(struct device_node *dn, int cpu) void __init cpu_read_bootcpu_ops(void) { - struct device_node *dn = NULL; - u64 mpidr = cpu_logical_map(0); - - while ((dn = of_find_node_by_type(dn, "cpu"))) { - u64 hwid; - const __be32 *prop; - - prop = of_get_property(dn, "reg", NULL); - if (!prop) - continue; - - hwid = of_read_number(prop, of_n_addr_cells(dn)); - if (hwid == mpidr) { - cpu_read_ops(dn, 0); - of_node_put(dn); - return; - } + struct device_node *dn = of_get_cpu_node(0, NULL); + if (!dn) { + pr_err("Failed to find device node for boot cpu\n"); + return; } + cpu_read_ops(dn, 0); } |