[PATCH v2 2/3] coresight: refactor with function of_coresight_get_cpu
From: Leo Yan <hidden>
Date: 2017-02-28 15:09:11
Also in:
linux-arm-kernel, lkml
Subsystem:
arm/coresight framework and drivers, hardware tracing facilities, the rest · Maintainers:
Suzuki K Poulose, Alexander Shishkin, Linus Torvalds
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 <redacted> Signed-off-by: Leo Yan <redacted> --- drivers/hwtracing/coresight/of_coresight.c | 35 ++++++++++++++++++++---------- include/linux/coresight.h | 2 ++ 2 files changed, 25 insertions(+), 12 deletions(-)
diff --git a/drivers/hwtracing/coresight/of_coresight.c b/drivers/hwtracing/coresight/of_coresight.c
index 629e031..2e7bbe2 100644
--- a/drivers/hwtracing/coresight/of_coresight.c
+++ b/drivers/hwtracing/coresight/of_coresight.c@@ -101,14 +101,34 @@ static int of_coresight_alloc_memory(struct device *dev, return 0; } +int of_coresight_get_cpu(struct device_node *node) +{ + int cpu; + struct device_node *dn; + + dn = of_parse_phandle(node, "cpu", 0); + + /* Affinity defaults to CPU0 */ + if (!dn) + return 0; + + for_each_possible_cpu(cpu) { + if (dn == of_get_cpu_node(cpu, NULL)) + break; + } + of_node_put(dn); + + return cpu; +} +EXPORT_SYMBOL_GPL(of_coresight_get_cpu); + struct coresight_platform_data *of_get_coresight_platform_data( struct device *dev, 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; - struct device_node *dn; struct device_node *ep = NULL; struct device_node *rparent = NULL; struct device_node *rport = NULL;
@@ -175,16 +195,7 @@ struct coresight_platform_data *of_get_coresight_platform_data( } while (ep); } - /* Affinity defaults to CPU0 */ - pdata->cpu = 0; - dn = of_parse_phandle(node, "cpu", 0); - for (cpu = 0; dn && cpu < nr_cpu_ids; cpu++) { - if (dn == of_get_cpu_node(cpu, NULL)) { - pdata->cpu = cpu; - break; - } - } - of_node_put(dn); + pdata->cpu = of_coresight_get_cpu(node); return pdata; }
diff --git a/include/linux/coresight.h b/include/linux/coresight.h
index 2a5982c..6709561 100644
--- a/include/linux/coresight.h
+++ b/include/linux/coresight.h@@ -263,11 +263,13 @@ static inline int coresight_timeout(void __iomem *addr, u32 offset, #endif #ifdef CONFIG_OF +extern int of_coresight_get_cpu(struct device_node *node); extern struct coresight_platform_data *of_get_coresight_platform_data( struct device *dev, struct device_node *node); #else static inline struct coresight_platform_data *of_get_coresight_platform_data( struct device *dev, struct device_node *node) { return NULL; } +static int of_coresight_get_cpu(struct device_node *node) { return 0; } #endif #ifdef CONFIG_PID_NS
--
2.7.4
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