riscv: Use of_get_cpu_hwid()

Replace open coded parsing of CPU nodes' 'reg' property with
of_get_cpu_hwid().

Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Albert Ou <aou@eecs.berkeley.edu>
Cc: linux-riscv@lists.infradead.org
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20211006164332.1981454-9-robh@kernel.org

diff --git a/arch/riscv/kernel/cpu.c b/arch/riscv/kernel/cpu.c
index 6d59e6906fddfb70442fe5826a797aa9017a5162..f13b2c9ea912d801f54d1819c1136facba71d372 100644 (file)
--- a/arch/riscv/kernel/cpu.c
+++ b/arch/riscv/kernel/cpu.c
@@ -22,7 +22,8 @@ int riscv_of_processor_hartid(struct device_node *node)
                return -ENODEV;
        }
 
-       if (of_property_read_u32(node, "reg", &hart)) {
+       hart = of_get_cpu_hwid(node, 0);
+       if (hart == ~0U) {
                pr_warn("Found CPU without hart ID\n");
                return -ENODEV;
        }