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authorSuzuki K Poulose <suzuki.poulose@arm.com>2018-01-02 11:25:28 +0000
committerWill Deacon <will.deacon@arm.com>2018-01-02 16:43:12 +0000
commit29198e3844caaaacb0e21eff634c5f1cfd7f89be (patch)
treeffc6e043e8bdabddbf3dee0e4280e87d81a2769c /drivers
parenta0e71cd9b1a0195f96500b2268759873ff8ff819 (diff)
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>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/hwtracing/coresight/of_coresight.c15
1 files changed, 3 insertions, 12 deletions
diff --git a/drivers/hwtracing/coresight/of_coresight.c b/drivers/hwtracing/coresight/of_coresight.c
index a18794128bf8..7c375443ede6 100644
--- a/drivers/hwtracing/coresight/of_coresight.c
+++ b/drivers/hwtracing/coresight/of_coresight.c
@@ -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);

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