[PATCH v9 1/5] usb: dwc3: separate dev_pm_ops for each pm_event

Guan-Yu Lin
2025-01-17T14:52:45Z

Separate dev_pm_ops for different power events such as suspend, thaw,
and hibernation. This is crucial when dwc3 driver needs to adapt its
behavior based on different power state changes.

Signed-off-by: Guan-Yu Lin <guanyulin@google.com>
---
drivers/usb/dwc3/core.c | 77 ++++++++++++++++++++++++++++++++++++++++-
1 file changed, 76 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index 6c960ff30c92..0735881d4650 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -2632,6 +2632,76 @@ static int dwc3_resume(struct device *dev)
return ret;
}

+static int dwc3_freeze(struct device *dev)
+{
+ struct dwc3 *dwc = dev_get_drvdata(dev);
+ int ret;
+
+ ret = dwc3_suspend_common(dwc, PMSG_FREEZE);
+ if (ret)
+ return ret;
+
+ pinctrl_pm_select_sleep_state(dev);
+
+ return 0;
+}
+
+static int dwc3_thaw(struct device *dev)
+{
+ struct dwc3 *dwc = dev_get_drvdata(dev);
+ int ret;
+
+ pinctrl_pm_select_default_state(dev);
+
+ pm_runtime_disable(dev);
+ pm_runtime_set_active(dev);
+
+ ret = dwc3_resume_common(dwc, PMSG_THAW);
+ if (ret) {
+ pm_runtime_set_suspended(dev);
+ return ret;
+ }
+
+ pm_runtime_enable(dev);
+
+ return 0;
+}
+
+static int dwc3_poweroff(struct device *dev)
+{
+ struct dwc3 *dwc = dev_get_drvdata(dev);
+ int ret;
+
+ ret = dwc3_suspend_common(dwc, PMSG_HIBERNATE);
+ if (ret)
+ return ret;
+
+ pinctrl_pm_select_sleep_state(dev);
+
+ return 0;
+}
+
+static int dwc3_restore(struct device *dev)
+{
+ struct dwc3 *dwc = dev_get_drvdata(dev);
+ int ret;
+
+ pinctrl_pm_select_default_state(dev);
+
+ pm_runtime_disable(dev);
+ pm_runtime_set_active(dev);
+
+ ret = dwc3_resume_common(dwc, PMSG_RESTORE);
+ if (ret) {
+ pm_runtime_set_suspended(dev);
+ return ret;
+ }
+
+ pm_runtime_enable(dev);
+
+ return 0;
+}
+
static void dwc3_complete(struct device *dev)
{
struct dwc3 *dwc = dev_get_drvdata(dev);
@@ -2649,7 +2719,12 @@ static void dwc3_complete(struct device *dev)
#endif /* CONFIG_PM_SLEEP */

static const struct dev_pm_ops dwc3_dev_pm_ops = {
- SET_SYSTEM_SLEEP_PM_OPS(dwc3_suspend, dwc3_resume)
+ .suspend = pm_sleep_ptr(dwc3_suspend),
+ .resume = pm_sleep_ptr(dwc3_resume),
+ .freeze = pm_sleep_ptr(dwc3_freeze),
+ .thaw = pm_sleep_ptr(dwc3_thaw),
+ .poweroff = pm_sleep_ptr(dwc3_poweroff),
+ .restore = pm_sleep_ptr(dwc3_restore),
.complete = dwc3_complete,

/*
--
2.48.0.rc2.279.g1de40edade-goog