linux-kernel - [PATCH v4 2/5] usb: xhci-plat: separate dev_pm_ops for each pm

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Message-ID: <20241009054429.3970438-3-guanyulin@google.com>
Date: Wed,  9 Oct 2024 05:42:56 +0000
From: Guan-Yu Lin <guanyulin@...gle.com>
To: Thinh.Nguyen@...opsys.com, gregkh@...uxfoundation.org, 
	mathias.nyman@...el.com, stern@...land.harvard.edu, elder@...nel.org, 
	oneukum@...e.com, yajun.deng@...ux.dev, dianders@...omium.org, 
	kekrby@...il.com, perex@...ex.cz, tiwai@...e.com, tj@...nel.org, 
	stanley_chang@...ltek.com, andreyknvl@...il.com, 
	christophe.jaillet@...adoo.fr, quic_jjohnson@...cinc.com, 
	ricardo@...liere.net, grundler@...omium.org, niko.mauno@...sala.com
Cc: linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-sound@...r.kernel.org, badhri@...gle.com, albertccwang@...gle.com, 
	quic_wcheng@...cinc.com, pumahsu@...gle.com, 
	Guan-Yu Lin <guanyulin@...gle.com>
Subject: [PATCH v4 2/5] 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 | 28 ++++++++++++++++++++++++----
 1 file changed, 24 insertions(+), 4 deletions(-)

diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index 8dc23812b204..6e49ef1908eb 100644
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -450,7 +450,7 @@ 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 pm_message pmsg)
 {
 	struct usb_hcd	*hcd = dev_get_drvdata(dev);
 	struct xhci_hcd	*xhci = hcd_to_xhci(hcd);
@@ -478,6 +478,21 @@ static int xhci_plat_suspend(struct device *dev)
 	return 0;
 }
 
+static int xhci_plat_suspend(struct device *dev)
+{
+	return xhci_plat_suspend_common(dev, PMSG_SUSPEND);
+}
+
+static int xhci_plat_freeze(struct device *dev)
+{
+	return xhci_plat_suspend_common(dev, PMSG_FREEZE);
+}
+
+static int xhci_plat_poweroff(struct device *dev)
+{
+	return xhci_plat_suspend_common(dev, PMSG_HIBERNATE);
+}
+
 static int xhci_plat_resume_common(struct device *dev, struct pm_message pmsg)
 {
 	struct usb_hcd	*hcd = dev_get_drvdata(dev);
@@ -524,6 +539,11 @@ static int xhci_plat_resume(struct device *dev)
 	return xhci_plat_resume_common(dev, PMSG_RESUME);
 }
 
+static int xhci_plat_thaw(struct device *dev)
+{
+	return xhci_plat_resume_common(dev, PMSG_THAW);
+}
+
 static int xhci_plat_restore(struct device *dev)
 {
 	return xhci_plat_resume_common(dev, PMSG_RESTORE);
@@ -553,9 +573,9 @@ 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_poweroff),
 	.restore = pm_sleep_ptr(xhci_plat_restore),
 
 	SET_RUNTIME_PM_OPS(xhci_plat_runtime_suspend,
-- 
2.47.0.rc0.187.ge670bccf7e-goog