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coresight: of: Use of_cpu_node_to_id helper 

Reuse the new generic helper, of_cpu_node_to_id() to map a
given CPU phandle to a logical CPU number.

Acked-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Tested-by: Leo Yan <leo.yan@linaro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Suzuki K Poulose 2018-01-02 11:25:28 +00:00 committed by Will Deacon
parent a0e71cd9b1
commit 29198e3844
1 changed files with 3 additions and 12 deletions
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15
drivers/hwtracing/coresight/of_coresight.c
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@ -104,26 +104,17 @@ static int of_coresight_alloc_memory(struct device *dev,
int of_coresight_get_cpu(const struct device_node *node)
{
int cpu;
bool found;
struct device_node *dn, *np;
struct device_node *dn;
dn = of_parse_phandle(node, "cpu", 0);
/* Affinity defaults to CPU0 */
if (!dn)
return 0;
for_each_possible_cpu(cpu) {
np = of_cpu_device_node_get(cpu);
found = (dn == np);
of_node_put(np);
if (found)
break;
}
cpu = of_cpu_node_to_id(dn);
of_node_put(dn);
/* Affinity to CPU0 if no cpu nodes are found */
return found ? cpu : 0;
return (cpu < 0) ? 0 : cpu;
}
EXPORT_SYMBOL_GPL(of_coresight_get_cpu);