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arm: cpu: read all address cells in dt for cpuid

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For v8/arm64 platforms the number of address-cells can be 2.
If the same device tree is used on 32-bit platforms,it is
currently reading only one cell of 32-bits.

Fix this by reading both cells for getting the hwid.

Change-Id: Id281b6b8ac3c9312848c39e11019284f970caced
Signed-off-by: Srinivas Ramana <sramana@codeaurora.org>
This commit is contained in:
Srinivas Ramana 2016-05-13 12:58:08 +05:30 • committed by Kyle Yan
parent 5f47a78399
commit e6855ed3fe
1 changed files with 5 additions and 4 deletions
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9
arch/arm/kernel/devtree.c
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@ -88,6 +88,7 @@ void __init arm_dt_init_cpu_maps(void)
for_each_child_of_node(cpus, cpu) {
u32 hwid;
const __be32 *cell;
if (of_node_cmp(cpu->type, "cpu"))
continue;
@ -98,13 +99,13 @@ void __init arm_dt_init_cpu_maps(void)
* properties is considered invalid to build the
* cpu_logical_map.
*/
if (of_property_read_u32(cpu, "reg", &hwid)) {
pr_debug(" * %s missing reg property\n",
cpu->full_name);
cell = of_get_property(cpu, "reg", NULL);
if (!cell) {
pr_err("%s: missing reg property\n", cpu->full_name);
of_node_put(cpu);
return;
}
hwid = of_read_number(cell, of_n_addr_cells(cpu));
/*
* 8 MSBs must be set to 0 in the DT since the reg property
* defines the MPIDR[23:0].