On 8/18/2025 10:30 PM, Leo Yan wrote:
On Fri, Aug 15, 2025 at 06:18:14AM -0700, Yuanfang Zhang wrote:
This patch adds runtime power management support for platform-based CoreSight Interconnect TNOC (ITNOC) devices. It introduces suspend and resume callbacks to manage the APB clock (`pclk`) during device runtime transitions.
Signed-off-by: Yuanfang Zhang yuanfang.zhang@oss.qualcomm.com
drivers/hwtracing/coresight/coresight-tnoc.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+)
diff --git a/drivers/hwtracing/coresight/coresight-tnoc.c b/drivers/hwtracing/coresight/coresight-tnoc.c index aa6f48d838c00d71eff22c18e34e00b93755fd82..f12a1698824bc678545319a3f482fd27e67a7352 100644 --- a/drivers/hwtracing/coresight/coresight-tnoc.c +++ b/drivers/hwtracing/coresight/coresight-tnoc.c @@ -270,6 +270,31 @@ static void itnoc_remove(struct platform_device *pdev) pm_runtime_disable(&pdev->dev); } +#ifdef CONFIG_PM +static int itnoc_runtime_suspend(struct device *dev) +{
- struct trace_noc_drvdata *drvdata = dev_get_drvdata(dev);
- clk_disable_unprepare(drvdata->pclk);
- return 0;
+}
+static int itnoc_runtime_resume(struct device *dev) +{
- struct trace_noc_drvdata *drvdata = dev_get_drvdata(dev);
- int ret;
- ret = clk_prepare_enable(drvdata->pclk);
- return ret;
Here can be simplified:
return clk_prepare_enable(drvdata->pclk);
sure, will update.
+} +#endif
+static const struct dev_pm_ops itnoc_dev_pm_ops = {
- SET_RUNTIME_PM_OPS(itnoc_runtime_suspend, itnoc_runtime_resume, NULL)
+};
static const struct of_device_id itnoc_of_match[] = { { .compatible = "qcom,coresight-itnoc" }, {} @@ -282,6 +307,7 @@ static struct platform_driver itnoc_driver = { .driver = { .name = "coresight-itnoc", .of_match_table = itnoc_of_match,
},.pm = &itnoc_dev_pm_ops,
};
-- 2.34.1
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