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Commit f89b001d 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: I73a13b7de023187b3fbdf256be7594502e46f4f9
Signed-off-by: default avatarAvinash Philip <avinashp@codeaurora.org>
parent 2e5dbc89

drivers/soc/qcom/llcc_perfmon.c

+22 −1
Original line number Diff line number Diff line
@@ -26,6 +26,7 @@ 
#include <linux/regmap.h>

#include <linux/soc/qcom/llcc-qcom.h>

#include <linux/module.h>

#include <linux/clk.h>

#include "llcc_events.h"

#include "llcc_perfmon.h"
@@ -79,6 +80,7 @@ struct event_port_ops { 
 * @mutex:		mutex to protect this structure

 * @hrtimer:		hrtimer instance for timer functionality

 * @expires:		timer expire time in nano seconds

 * @clk:		clock node to enable qdss

 */

struct llcc_perfmon_private {

	struct regmap *llcc_map;
@@ -94,6 +96,7 @@ struct llcc_perfmon_private { 
	struct mutex mutex;

	struct hrtimer hrtimer;

	ktime_t expires;

	struct clk *clock;

};



static inline void llcc_bcast_write(struct llcc_perfmon_private *llcc_priv,
@@ -514,14 +517,24 @@ static ssize_t perfmon_start_store(struct device *dev, 
	struct llcc_perfmon_private *llcc_priv = dev_get_drvdata(dev);

	uint32_t val = 0, mask;

	unsigned long start;

	int ret;



	if (kstrtoul(buf, 10, &start))

		return -EINVAL;



	mutex_lock(&llcc_priv->mutex);

	if (start) {

		if (!llcc_priv->configured_counters)

		if (!llcc_priv->configured_counters) {

			pr_err("start failed. perfmon not configured\n");

			mutex_unlock(&llcc_priv->mutex);

			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) {
@@ -545,6 +558,8 @@ static ssize_t perfmon_start_store(struct device *dev, 
	mask = PERFMON_MODE_MONITOR_MODE_MASK | PERFMON_MODE_MONITOR_EN_MASK;

	llcc_bcast_modify(llcc_priv, PERFMON_MODE, val, mask);



	if (!start)

		clk_disable_unprepare(llcc_priv->clock);



	mutex_unlock(&llcc_priv->mutex);

	return count;
@@ -1148,6 +1163,12 @@ static int llcc_perfmon_probe(struct platform_device *pdev) 
		return result;

	}



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

	if (IS_ERR(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 version group\n");