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coresight: remote-etm: remote etm supports suspend & hibernation

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In the suspend & hibernation entry, clear the qdss_clk_cnt by
disabling remote etm which has been enabled. Allowing QDSS work post
suspend & hibernation.

Change-Id: I2a506f1a6466cc5dcd03598e02a4ab1985fb0e68
Signed-off-by: Yuanfang Zhang <quic_yuanfang@quicinc.com>
Signed-off-by: Darshankumar Jagdishchandra Thakkar <quic_djagdish@quicinc.com>
This commit is contained in:
Yuanfang Zhang 2024-02-20 12:26:19 +01:00 committed by Darshankumar Jagdishchandra Thakkar
parent 464c1bf1a0
commit 585a72bc16
1 changed files with 34 additions and 0 deletions
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34
drivers/hwtracing/coresight/coresight-remote-etm.c
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@ -18,6 +18,7 @@
#include <linux/coresight.h>
#include "coresight-qmi.h"
#include "coresight-priv.h"
#include <linux/suspend.h>
#define REMOTE_ETM_TRACE_ID_START 192
@ -423,12 +424,45 @@ static const struct of_device_id remote_etm_match[] = {
{}
};
#ifdef CONFIG_DEEPSLEEP
static int remote_etm_suspend(struct device *dev)
{
struct remote_etm_drvdata *drvdata = dev_get_drvdata(dev);
if (pm_suspend_via_firmware())
coresight_disable(drvdata->csdev);
return 0;
}
#endif
#ifdef CONFIG_HIBERNATION
static int remote_etm_freeze(struct device *dev)
{
struct remote_etm_drvdata *drvdata = dev_get_drvdata(dev);
coresight_disable(drvdata->csdev);
return 0;
}
#endif
static const struct dev_pm_ops remote_etm_dev_pm_ops = {
#ifdef CONFIG_DEEPSLEEP
.suspend = remote_etm_suspend,
#endif
#ifdef CONFIG_HIBERNATION
.freeze = remote_etm_freeze,
#endif
};
static struct platform_driver remote_etm_driver = {
.probe = remote_etm_probe,
.remove = remote_etm_remove,
.driver = {
.name = "coresight-remote-etm",
.of_match_table = remote_etm_match,
.pm = &remote_etm_dev_pm_ops,
},
};