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Subject[PATCH v3 3/6] coresight: of: Use of_device_node_get_cpu helper
Date
Reuse the new generic helper, of_device_node_get_cpu() to map a
given CPU phandle to a logical CPU number.

Cc: Leo Yan <leo.yan@linaro.org>
Acked-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
---
drivers/hwtracing/coresight/of_coresight.c | 20 ++++++--------------
1 file changed, 6 insertions(+), 14 deletions(-)

diff --git a/drivers/hwtracing/coresight/of_coresight.c b/drivers/hwtracing/coresight/of_coresight.c
index a187941..42ce9f8 100644
--- a/drivers/hwtracing/coresight/of_coresight.c
+++ b/drivers/hwtracing/coresight/of_coresight.c
@@ -16,6 +16,7 @@
#include <linux/clk.h>
#include <linux/of.h>
#include <linux/of_address.h>
+#include <linux/of_device.h>
#include <linux/of_graph.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
@@ -104,26 +105,17 @@ 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;
- }
- of_node_put(dn);
-
+ cpu = of_device_node_get_cpu(dn);
/* Affinity to CPU0 if no cpu nodes are found */
- return found ? cpu : 0;
+ if (cpu >= nr_cpu_ids)
+ return 0;
+ return cpu;
}
EXPORT_SYMBOL_GPL(of_coresight_get_cpu);

--
2.7.5
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