esight/coresight-tmc-core.c
index 88afb16bb6bec..0b5e7635a084d 100644
--- a/drivers/hwtracing/coresight/coresight-tmc-core.c
+++ b/drivers/hwtracing/coresight/coresight-tmc-core.c
@@ -789,6 +789,10 @@ static int __tmc_probe(struct device *dev, struct resource *res)
 	struct coresight_desc desc = { 0 };
 	struct coresight_dev_list *dev_list = NULL;
 
+	drvdata->atclk = devm_clk_get_optional_enabled(dev, "atclk");
+	if (IS_ERR(drvdata->atclk))
+		return PTR_ERR(drvdata->atclk);
+
 	ret = -ENOMEM;
 
 	/* Validity for the resource is already checked by the AMBA core */
@@ -1020,18 +1024,26 @@ static int tmc_runtime_suspend(struct device *dev)
 {
 	struct tmc_drvdata *drvdata = dev_get_drvdata(dev);
 
-	if (drvdata && !IS_ERR_OR_NULL(drvdata->pclk))
-		clk_disable_unprepare(drvdata->pclk);
+	clk_disable_unprepare(drvdata->atclk);
+	clk_disable_unprepare(drvdata->pclk);
+
 	return 0;
 }
 
 static int tmc_runtime_resume(struct device *dev)
 {
 	struct tmc_drvdata *drvdata = dev_get_drvdata(dev);
+	int ret;
 
-	if (drvdata && !IS_ERR_OR_NULL(drvdata->pclk))
-		clk_prepare_enable(drvdata->pclk);
-	return 0;
+	ret = clk_prepare_enable(drvdata->pclk);
+	if (ret)
+		return ret;
+
+	ret = clk_prepare_enable(drvdata->atclk);
+	if (ret)
+		clk_disable_unprepare(drvdata->pclk);
+
+	return ret;
 }
 #endif
 
diff --git a/drivers/hwtracing/coresight/coresight-tmc.h b/drivers/hwtracing/coresight/coresight-tmc.h
index 6541a27a018e6..cbb4ba4391585 100644
--- a/drivers/hwtracing/coresight/coresight-tmc.h
+++ b/drivers/hwtracing/coresight/coresight-tmc.h
@@ -210,6 +210,7 @@ struct tmc_resrv_buf {
 
 /**
  * struct tmc_drvdata - specifics associated to an TMC component
+ * @atclk:	optional clock for the core parts of the TMC.
  * @pclk:	APB clock if present, otherwise NULL
  * @base:	memory mapped base address for this component.
  * @csdev:	component vitals needed by the framework.
@@ -244,6 +245,7 @@ struct tmc_resrv_buf {
  *		 Used by ETR/ETF.
  */
 struct tmc_drvdata {
+	struct clk		*atclk;
 	struct clk		*pclk;
 	void __iomem		*base;
 	struct coresight_device	*csdev;
-- 
2.51.0[PATCH 6.17 425/563] coresight: tmc: Support atclkGreg Kroah-Hartman <gregkh@linuxfoundation.org> undefinedstable@vger.kernel.org undefined undefined undefined undefined undefined undefined undefined undefinedŒoƒ—