linux-kernel - [PATCH v10 1/4] usb: xhci-plat: separate dev_pm_ops for each pm

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Message-ID: <20250401062951.3180871-2-guanyulin@google.com>
Date: Tue,  1 Apr 2025 06:22:39 +0000
From: Guan-Yu Lin <guanyulin@...gle.com>
To: gregkh@...uxfoundation.org, mathias.nyman@...el.com, 
	stern@...land.harvard.edu, sumit.garg@...nel.org, kekrby@...il.com, 
	jeff.johnson@....qualcomm.com, elder@...nel.org, quic_zijuhu@...cinc.com, 
	ben@...adent.org.uk
Cc: linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org, 
	Guan-Yu Lin <guanyulin@...gle.com>
Subject: [PATCH v10 1/4] usb: xhci-plat: separate dev_pm_ops for each pm_event

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

Signed-off-by: Guan-Yu Lin <guanyulin@...gle.com>
---
 drivers/usb/host/xhci-plat.c | 23 +++++++++++++++++++----
 1 file changed, 19 insertions(+), 4 deletions(-)

diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index 6dab142e7278..9843d3ad5cf4 100644
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -453,7 +453,7 @@ void xhci_plat_remove(struct platform_device *dev)
 }
 EXPORT_SYMBOL_GPL(xhci_plat_remove);
 
-static int xhci_plat_suspend(struct device *dev)
+static int xhci_plat_suspend_common(struct device *dev)
 {
 	struct usb_hcd	*hcd = dev_get_drvdata(dev);
 	struct xhci_hcd	*xhci = hcd_to_xhci(hcd);
@@ -481,6 +481,16 @@ static int xhci_plat_suspend(struct device *dev)
 	return 0;
 }
 
+static int xhci_plat_suspend(struct device *dev)
+{
+	return xhci_plat_suspend_common(dev);
+}
+
+static int xhci_plat_freeze(struct device *dev)
+{
+	return xhci_plat_suspend_common(dev);
+}
+
 static int xhci_plat_resume_common(struct device *dev, bool power_lost)
 {
 	struct usb_hcd	*hcd = dev_get_drvdata(dev);
@@ -528,6 +538,11 @@ static int xhci_plat_resume(struct device *dev)
 	return xhci_plat_resume_common(dev, false);
 }
 
+static int xhci_plat_thaw(struct device *dev)
+{
+	return xhci_plat_resume_common(dev, false);
+}
+
 static int xhci_plat_restore(struct device *dev)
 {
 	return xhci_plat_resume_common(dev, true);
@@ -557,9 +572,9 @@ static int __maybe_unused xhci_plat_runtime_resume(struct device *dev)
 const struct dev_pm_ops xhci_plat_pm_ops = {
 	.suspend = pm_sleep_ptr(xhci_plat_suspend),
 	.resume = pm_sleep_ptr(xhci_plat_resume),
-	.freeze = pm_sleep_ptr(xhci_plat_suspend),
-	.thaw = pm_sleep_ptr(xhci_plat_resume),
-	.poweroff = pm_sleep_ptr(xhci_plat_suspend),
+	.freeze = pm_sleep_ptr(xhci_plat_freeze),
+	.thaw = pm_sleep_ptr(xhci_plat_thaw),
+	.poweroff = pm_sleep_ptr(xhci_plat_freeze),
 	.restore = pm_sleep_ptr(xhci_plat_restore),
 
 	SET_RUNTIME_PM_OPS(xhci_plat_runtime_suspend,
-- 
2.49.0.472.ge94155a9ec-goog