[PATCH 1/2] coresight: tmc: Add enable flag to indicate the status of ETR/ETF

[Sai Prakash Ranjan]

Add a flag to check whether TMC ETR/ETF is enabled or not.
This is later used in shutdown callback to determine if
we require to disable ETR/ETF.

Signed-off-by: Sai Prakash Ranjan <saiprakash.ranjan@xxxxxxxxxxxxxx>
---
 drivers/hwtracing/coresight/coresight-tmc.c | 2 ++
 drivers/hwtracing/coresight/coresight-tmc.h | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/drivers/hwtracing/coresight/coresight-tmc.c b/drivers/hwtracing/coresight/coresight-tmc.c
index 39fba1d16e6e..5a271ebc4585 100644
--- a/drivers/hwtracing/coresight/coresight-tmc.c
+++ b/drivers/hwtracing/coresight/coresight-tmc.c
@@ -62,11 +62,13 @@ void tmc_flush_and_stop(struct tmc_drvdata *drvdata)
 
 void tmc_enable_hw(struct tmc_drvdata *drvdata)
 {
+	drvdata->enable = true;
 	writel_relaxed(TMC_CTL_CAPT_EN, drvdata->base + TMC_CTL);
 }
 
 void tmc_disable_hw(struct tmc_drvdata *drvdata)
 {
+	drvdata->enable = false;
 	writel_relaxed(0x0, drvdata->base + TMC_CTL);
 }
 
diff --git a/drivers/hwtracing/coresight/coresight-tmc.h b/drivers/hwtracing/coresight/coresight-tmc.h
index 71de978575f3..d156860495c7 100644
--- a/drivers/hwtracing/coresight/coresight-tmc.h
+++ b/drivers/hwtracing/coresight/coresight-tmc.h
@@ -184,6 +184,7 @@ struct etr_buf {
  * @idr_mutex:	Access serialisation for idr.
  * @sysfs_buf:	SYSFS buffer for ETR.
  * @perf_buf:	PERF buffer for ETR.
+ * @enable:	Indicates whether ETR/ETF is enabled.
  */
 struct tmc_drvdata {
 	void __iomem		*base;
@@ -207,6 +208,7 @@ struct tmc_drvdata {
 	struct mutex		idr_mutex;
 	struct etr_buf		*sysfs_buf;
 	struct etr_buf		*perf_buf;
+	bool			enable;
 };
 
 struct etr_buf_operations {
-- 
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