From: Mao Han <han_mao@c-sky.com>
To: linux-kernel@vger.kernel.org
Cc: Mao Han <han_mao@c-sky.com>,
linux-csky@vger.kernel.org, Guo Ren <guoren@kernel.org>
Subject: [PATCH V5 1/6] csky: Init pmu as a device
Date: Tue, 4 Jun 2019 18:54:44 +0800 [thread overview]
Message-ID: <06bdeb08d3d1240900c37a83c2c5dfa131f61554.1559644961.git.han_mao@c-sky.com> (raw)
In-Reply-To: <cover.1559644961.git.han_mao@c-sky.com>
In-Reply-To: <cover.1559644961.git.han_mao@c-sky.com>
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 <han_mao@c-sky.com>
Cc: Guo Ren <guoren@kernel.org>
---
arch/csky/kernel/perf_event.c | 50 +++++++++++++++++++++++++++++++++++++++++--
1 file changed, 48 insertions(+), 2 deletions(-)
diff --git a/arch/csky/kernel/perf_event.c b/arch/csky/kernel/perf_event.c
index 376c972..2282554 100644
--- a/arch/csky/kernel/perf_event.c
+++ b/arch/csky/kernel/perf_event.c
@@ -949,7 +949,7 @@ static int csky_pmu_add(struct perf_event *event, int flags)
return 0;
}
-int __init init_hw_perf_events(void)
+int init_hw_perf_events(void)
{
csky_pmu.pmu = (struct pmu) {
.pmu_enable = csky_pmu_enable,
@@ -1028,4 +1028,50 @@ 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)
+{
+ int ret;
+
+ ret = init_hw_perf_events();
+ 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"},
+ {},
+};
+
+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
next prev parent reply other threads:[~2019-06-04 10:56 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-04 10:54 [PATCH V5 0/6] csky: Add pmu hardware sampling support Mao Han
2019-06-04 10:54 ` Mao Han [this message]
2019-06-04 10:54 ` [PATCH V5 2/6] csky: Add count-width property for csky pmu Mao Han
2019-06-04 10:54 ` [PATCH V5 3/6] csky: Add pmu interrupt support Mao Han
2019-06-04 10:54 ` [PATCH V5 4/6] dt-bindings: csky: Add csky PMU bindings Mao Han
2019-06-04 10:54 ` [PATCH V5 5/6] csky: Fixup some error count in 810 & 860 Mao Han
2019-06-04 10:54 ` [PATCH V5 6/6] csky: Fix perf record in kernel/user space Mao Han
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