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coresight: refactor with function of_coresight_get_cpu 

This is refactor to add function of_coresight_get_cpu(), so it's used to
retrieve CPU id for coresight component. Finally can use it as a common
function for multiple places.

Suggested-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Leo Yan <leo.yan@linaro.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Leo Yan 2017-06-05 14:15:15 -06:00 committed by Greg Kroah-Hartman
parent 04c9490035
commit c56cdd7a5c
2 changed files with 31 additions and 15 deletions
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43
drivers/hwtracing/coresight/of_coresight.c
View File

@ -101,16 +101,40 @@ static int of_coresight_alloc_memory(struct device *dev,
return 0;
}
int of_coresight_get_cpu(const struct device_node *node)
{
int cpu;
bool found;
struct device_node *dn, *np;
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);
/* Affinity to CPU0 if no cpu nodes are found */
return found ? cpu : 0;
}
EXPORT_SYMBOL_GPL(of_coresight_get_cpu);
struct coresight_platform_data *
of_get_coresight_platform_data(struct device *dev,
const struct device_node *node)
{
int i = 0, ret = 0, cpu;
int i = 0, ret = 0;
struct coresight_platform_data *pdata;
struct of_endpoint endpoint, rendpoint;
struct device *rdev;
bool found;
struct device_node *dn, *np;
struct device_node *ep = NULL;
struct device_node *rparent = NULL;
struct device_node *rport = NULL;
@ -177,18 +201,7 @@ of_get_coresight_platform_data(struct device *dev,
} while (ep);
}
dn = of_parse_phandle(node, "cpu", 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);
/* Affinity to CPU0 if no cpu nodes are found */
pdata->cpu = found ? cpu : 0;
pdata->cpu = of_coresight_get_cpu(node);
return pdata;
}

3
include/linux/coresight.h
View File

@ -263,10 +263,13 @@ static inline int coresight_timeout(void __iomem *addr, u32 offset,
#endif
#ifdef CONFIG_OF
extern int of_coresight_get_cpu(const struct device_node *node);
extern struct coresight_platform_data *
of_get_coresight_platform_data(struct device *dev,
const struct device_node *node);
#else
static inline int of_coresight_get_cpu(const struct device_node *node)
{ return 0; }
static inline struct coresight_platform_data *of_get_coresight_platform_data(
struct device *dev, const struct device_node *node) { return NULL; }
#endif