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coresight: CTI: CTI supports suspend & hibernation

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In the suspend & hibernation entry, clear the qdss_clk_cnt by
disabling CTI which has been enabled. And re-enable it in QB.
Allowing QDSS work post suspend & hibernation.

Change-Id: I24c0783130eed8ff1903d3ffd84dce6c144afa28
Signed-off-by: Xiaoqi Zhuang <quic_xiaozhua@quicinc.com>
Signed-off-by: songchai <quic_songchai@quicinc.com>
This commit is contained in:
songchai 2024-07-11 23:24:07 -07:00
parent c4a81a6dd5
commit 1cf3647dc3
1 changed files with 23 additions and 0 deletions
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23
drivers/hwtracing/coresight/coresight-cti-core.c
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@ -20,6 +20,7 @@
#include <linux/property.h>
#include <linux/spinlock.h>
#include <linux/pinctrl/consumer.h>
#include <linux/suspend.h>
#include "coresight-priv.h"
#include "coresight-cti.h"
@ -1142,6 +1143,27 @@ static int cti_probe(struct amba_device *adev, const struct amba_id *id)
return ret;
}
#ifdef CONFIG_HIBERNATION
static int cti_freeze(struct device *dev)
{
int rc = 0;
struct cti_drvdata *drvdata = dev_get_drvdata(dev);
if (drvdata->config.hw_enabled)
rc = cti_disable(drvdata->csdev);
return rc;
}
#endif
static const struct dev_pm_ops cti_dev_pm_ops = {
#ifdef CONFIG_HIBERNATION
.freeze = cti_freeze,
#endif
};
static struct amba_cs_uci_id uci_id_cti[] = {
{
/* CTI UCI data */
@ -1167,6 +1189,7 @@ static struct amba_driver cti_driver = {
.drv = {
.name = "coresight-cti",
.owner = THIS_MODULE,
.pm = &cti_dev_pm_ops,
.suppress_bind_attrs = true,
},
.probe = cti_probe,