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drver:soc:llcc_perfmon: qdss clk node control

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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: Avinash Philip <avinashp@codeaurora.org>
This commit is contained in:
Avinash Philip 2020-06-14 15:08:38 +05:30
commit c3aaf706c3
1 changed files with 19 additions and 0 deletions
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19
drivers/soc/qcom/llcc_perfmon.c
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@ -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");