This patch change the csky pmu initialization from arch init to
device init. The pmu can be configued with information from
device tree(pmu device name, irq number and etc.).
Signed-off-by: Mao Han <[email protected]>
CC: Guo Ren <[email protected]>
CC: [email protected]
---
arch/csky/kernel/perf_event.c | 58 ++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 57 insertions(+), 1 deletion(-)
diff --git a/arch/csky/kernel/perf_event.c b/arch/csky/kernel/perf_event.c
index 376c972..c022acc 100644
--- a/arch/csky/kernel/perf_event.c
+++ b/arch/csky/kernel/perf_event.c
@@ -21,6 +21,8 @@ struct csky_pmu_t {
uint32_t hpcr;
} csky_pmu;
+typedef int (*csky_pmu_init)(struct csky_pmu_t *);
+
#define cprgr(reg) \
({ \
unsigned int tmp; \
@@ -1028,4 +1030,58 @@ int __init init_hw_perf_events(void)
return perf_pmu_register(&csky_pmu.pmu, "cpu", PERF_TYPE_RAW);
}
-arch_initcall(init_hw_perf_events);
+
+int csky_pmu_device_probe(struct platform_device *pdev,
+ const struct of_device_id *of_table)
+{
+ const struct of_device_id *of_id;
+ csky_pmu_init init_fn;
+ struct device_node *node = pdev->dev.of_node;
+ int ret = -ENODEV;
+
+ of_id = of_match_node(of_table, pdev->dev.of_node);
+ if (node && of_id) {
+ init_fn = of_id->data;
+ ret = init_fn(&csky_pmu);
+ }
+
+ if (ret) {
+ pr_notice("[perf] failed to probe PMU!\n");
+ return ret;
+ }
+
+ return ret;
+}
+
+const static struct of_device_id csky_pmu_of_device_ids[] = {
+ {.compatible = "csky,csky-pmu", .data = init_hw_perf_events},
+ {},
+};
+
+static int csky_pmu_dev_probe(struct platform_device *pdev)
+{
+ return csky_pmu_device_probe(pdev, csky_pmu_of_device_ids);
+}
+
+static struct platform_driver csky_pmu_driver = {
+ .driver = {
+ .name = "csky-pmu",
+ .of_match_table = csky_pmu_of_device_ids,
+ },
+ .probe = csky_pmu_dev_probe,
+};
+
+static int __init csky_pmu_probe(void)
+{
+ int ret;
+
+ ret = platform_driver_register(&csky_pmu_driver);
+ if (ret)
+ pr_notice("[perf] PMU initialization failed\n");
+ else
+ pr_notice("[perf] PMU initialization done\n");
+
+ return ret;
+}
+
+device_initcall(csky_pmu_probe);
--
2.7.4