[PATCH v1 0/2] Add the PM suspend/resume callbacks for qcom-combo phys

[PATCH v1 0/2] Add the PM suspend/resume callbacks for qcom-combo phys

[Prashanth K]

Currently the phy clocks are left ON during system suspend, this leading to
power leakages. Prevent this by disabling the phy clocks during PM suspend.

Prashanth K (2):
  phy: qcom: qmp-combo: Add PM suspend/resume callbacks
  phy: qcom: qmp-usb: Add PM suspend/resume callbacks

 drivers/phy/qualcomm/phy-qcom-qmp-combo.c | 17 +++++++++++++++++
 drivers/phy/qualcomm/phy-qcom-qmp-usb.c   | 17 +++++++++++++++++
 2 files changed, 34 insertions(+)

-- 
2.34.1

[PATCH v1 1/2] phy: qcom: qmp-combo: Add PM suspend/resume callbacks

[Prashanth K]

Currently when we perform system suspend, the phy clocks aren't
turned off leading to power leakage. Prevent this by adding PM
suspend/resume callbacks for the qmp-combo-phy which toggles
clocks on/off correspondingly.

Signed-off-by: Prashanth K <prashanth.k@oss.qualcomm.com>
---
 drivers/phy/qualcomm/phy-qcom-qmp-combo.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-combo.c b/drivers/phy/qualcomm/phy-qcom-qmp-combo.c
index c39ced168d03..f624195c9b84 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp-combo.c
+++ b/drivers/phy/qualcomm/phy-qcom-qmp-combo.c
@@ -4463,9 +4463,26 @@ static int __maybe_unused qmp_combo_runtime_resume(struct device *dev)
 	return 0;
 }
 
+static int __maybe_unused qmp_combo_pm_suspend(struct device *dev)
+{
+	if (pm_runtime_suspended(dev))
+		return 0;
+
+	return qmp_combo_runtime_suspend(dev);
+}
+
+static int __maybe_unused qmp_combo_pm_resume(struct device *dev)
+{
+	if (pm_runtime_suspended(dev))
+		return 0;
+
+	return qmp_combo_runtime_resume(dev);
+}
+
 static const struct dev_pm_ops qmp_combo_pm_ops = {
 	SET_RUNTIME_PM_OPS(qmp_combo_runtime_suspend,
 			   qmp_combo_runtime_resume, NULL)
+	SET_SYSTEM_SLEEP_PM_OPS(qmp_combo_pm_suspend, qmp_combo_pm_resume)
 };
 
 static int qmp_combo_reset_init(struct qmp_combo *qmp)
-- 
2.34.1

[PATCH v1 2/2] phy: qcom: qmp-usb: Add PM suspend/resume callbacks

[Prashanth K]

Currently when we perform system suspend, the phy clocks aren't
turned off, this leads to power leakage. Prevent this by adding
PM suspend/resume callbacks for the qmp-usb phy which toggles
clocks on/off correspondingly.

Signed-off-by: Prashanth K <prashanth.k@oss.qualcomm.com>
---
 drivers/phy/qualcomm/phy-qcom-qmp-usb.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-usb.c b/drivers/phy/qualcomm/phy-qcom-qmp-usb.c
index b0790bcf0bc8..d2863633007d 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp-usb.c
+++ b/drivers/phy/qualcomm/phy-qcom-qmp-usb.c
@@ -2150,9 +2150,26 @@ static int __maybe_unused qmp_usb_runtime_resume(struct device *dev)
 	return 0;
 }
 
+static int __maybe_unused qmp_usb_pm_suspend(struct device *dev)
+{
+	if (pm_runtime_suspended(dev))
+		return 0;
+
+	return qmp_usb_runtime_suspend(dev);
+}
+
+static int __maybe_unused qmp_usb_pm_resume(struct device *dev)
+{
+	if (pm_runtime_suspended(dev))
+		return 0;
+
+	return qmp_usb_runtime_resume(dev);
+}
+
 static const struct dev_pm_ops qmp_usb_pm_ops = {
 	SET_RUNTIME_PM_OPS(qmp_usb_runtime_suspend,
 			   qmp_usb_runtime_resume, NULL)
+	SET_SYSTEM_SLEEP_PM_OPS(qmp_usb_pm_suspend, qmp_usb_pm_resume)
 };
 
 static int qmp_usb_reset_init(struct qmp_usb *qmp,
-- 
2.34.1

Re: [PATCH v1 1/2] phy: qcom: qmp-combo: Add PM suspend/resume callbacks

[Konrad Dybcio]

On 10/22/26 12:43 PM, Prashanth K wrote:
> Currently when we perform system suspend, the phy clocks aren't
> turned off leading to power leakage. Prevent this by adding PM
> suspend/resume callbacks for the qmp-combo-phy which toggles
> clocks on/off correspondingly.
> 
> Signed-off-by: Prashanth K <prashanth.k@oss.qualcomm.com>
> ---

Well this still leaves pm_runtime_forbid() in the probe function..

>  drivers/phy/qualcomm/phy-qcom-qmp-combo.c | 17 +++++++++++++++++
>  1 file changed, 17 insertions(+)
> 
> diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-combo.c b/drivers/phy/qualcomm/phy-qcom-qmp-combo.c
> index c39ced168d03..f624195c9b84 100644
> --- a/drivers/phy/qualcomm/phy-qcom-qmp-combo.c
> +++ b/drivers/phy/qualcomm/phy-qcom-qmp-combo.c
> @@ -4463,9 +4463,26 @@ static int __maybe_unused qmp_combo_runtime_resume(struct device *dev)
>  	return 0;
>  }
>  
> +static int __maybe_unused qmp_combo_pm_suspend(struct device *dev)
> +{
> +	if (pm_runtime_suspended(dev))
> +		return 0;
> +
> +	return qmp_combo_runtime_suspend(dev);
> +}
> +
> +static int __maybe_unused qmp_combo_pm_resume(struct device *dev)
> +{
> +	if (pm_runtime_suspended(dev))
> +		return 0;
> +
> +	return qmp_combo_runtime_resume(dev);
> +}
> +
>  static const struct dev_pm_ops qmp_combo_pm_ops = {
>  	SET_RUNTIME_PM_OPS(qmp_combo_runtime_suspend,
>  			   qmp_combo_runtime_resume, NULL)
> +	SET_SYSTEM_SLEEP_PM_OPS(qmp_combo_pm_suspend, qmp_combo_pm_resume)

You can instead do

+	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+				pm_runtime_force_resume)

and as a related fix, we should probably throw a mutex guard into the
runtime pm functions

Konrad