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Commit c3aaf706 authored by Avinash Philip's avatar Avinash Philip
Browse files

drver:soc:llcc_perfmon: qdss clk node control 



qdss clock needs to be enabled on llcc_perfmon counter to function.
Enable/disable clock on Start/Stop llcc_perfmon commands.

Change-Id: Ic75119a08f0be1deadcdc694f27098296bfda07e
Signed-off-by: default avatarAvinash Philip <avinashp@codeaurora.org>
parent 9b79acf9

drivers/soc/qcom/llcc_perfmon.c

+19 −0
Original line number Diff line number Diff line
@@ -69,6 +69,7 @@ struct event_port_ops { 
 * @expires:		timer expire time in nano seconds

 * @num_mc:		number of MCS

 * @version:		Version information of llcc block

 * @clk:		clock node to enable qdss

 */

struct llcc_perfmon_private {

	struct regmap *llcc_map;
@@ -86,6 +87,7 @@ struct llcc_perfmon_private { 
	ktime_t expires;

	unsigned int num_mc;

	unsigned int version;

	struct clk *clock;

};



static inline void llcc_bcast_write(struct llcc_perfmon_private *llcc_priv,
@@ -500,6 +502,7 @@ static ssize_t perfmon_start_store(struct device *dev, 
	struct llcc_perfmon_private *llcc_priv = dev_get_drvdata(dev);

	uint32_t val = 0, mask_val;

	unsigned long start;

	int ret;



	if (kstrtoul(buf, 0, &start))

		return -EINVAL;
@@ -512,6 +515,12 @@ static ssize_t perfmon_start_store(struct device *dev, 
			return -EINVAL;

		}



		ret = clk_prepare_enable(llcc_priv->clock);

		if (ret) {

			mutex_unlock(&llcc_priv->mutex);

			return -EINVAL;

		}



		val = MANUAL_MODE | MONITOR_EN;

		if (llcc_priv->expires) {

			if (hrtimer_is_queued(&llcc_priv->hrtimer))
@@ -534,6 +543,10 @@ static ssize_t perfmon_start_store(struct device *dev, 
	mask_val = PERFMON_MODE_MONITOR_MODE_MASK |

		PERFMON_MODE_MONITOR_EN_MASK;

	llcc_bcast_modify(llcc_priv, PERFMON_MODE, val, mask_val);



	if (!start)

		clk_disable_unprepare(llcc_priv->clock);



	mutex_unlock(&llcc_priv->mutex);

	return count;

}
@@ -1269,6 +1282,12 @@ static int llcc_perfmon_probe(struct platform_device *pdev) 
	else if (val == LLCC_VERSION_2)

		llcc_priv->version = REV_2;



	llcc_priv->clock = devm_clk_get(pdev->dev.parent, "qdss_clk");

	if (IS_ERR_OR_NULL(llcc_priv->clock)) {

		pr_err("failed to get clock node\n");

		return PTR_ERR(llcc_priv->clock);

	}



	result = sysfs_create_group(&pdev->dev.kobj, &llcc_perfmon_group);

	if (result) {

		pr_err("Unable to create sysfs group\n");