linux-kernel - [PATCH v3 5/9] usb: host: xhci-plat: Add .post_resume_quirk for struct xhci_plat

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Message-ID: <20250916150255.4231-6-biju.das.jz@bp.renesas.com>
Date: Tue, 16 Sep 2025 16:02:41 +0100
From: Biju <biju.das.au@...il.com>
To: Mathias Nyman <mathias.nyman@...el.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Biju Das <biju.das.jz@...renesas.com>,
	linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	Prabhakar Mahadev Lad <prabhakar.mahadev-lad.rj@...renesas.com>,
	Biju Das <biju.das.au@...il.com>,
	linux-renesas-soc@...r.kernel.org
Subject: [PATCH v3 5/9] usb: host: xhci-plat: Add .post_resume_quirk for struct xhci_plat_priv

From: Biju Das <biju.das.jz@...renesas.com>

Some SoCs (eg Renesas RZ/G3E SoC) have special sequence after
xhci_resume, add .post_resume_quick for it.

Signed-off-by: Biju Das <biju.das.jz@...renesas.com>
---
v2->v3:
 * No change.
v1->v2:
 * No change.
---
 drivers/usb/host/xhci-plat.c | 14 ++++++++++++++
 drivers/usb/host/xhci-plat.h |  1 +
 2 files changed, 15 insertions(+)

diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index 3a56d8f94519..9e58431f486b 100644
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -75,6 +75,16 @@ static int xhci_priv_resume_quirk(struct usb_hcd *hcd)
 	return priv->resume_quirk(hcd);
 }
 
+static int xhci_priv_post_resume_quirk(struct usb_hcd *hcd)
+{
+	struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd);
+
+	if (!priv->post_resume_quirk)
+		return 0;
+
+	return priv->post_resume_quirk(hcd);
+}
+
 static void xhci_plat_quirks(struct device *dev, struct xhci_hcd *xhci)
 {
 	struct xhci_plat_priv *priv = xhci_to_priv(xhci);
@@ -529,6 +539,10 @@ static int xhci_plat_resume_common(struct device *dev, bool power_lost)
 	if (ret)
 		goto disable_clks;
 
+	ret = xhci_priv_post_resume_quirk(hcd);
+	if (ret)
+		goto disable_clks;
+
 	pm_runtime_disable(dev);
 	pm_runtime_set_active(dev);
 	pm_runtime_enable(dev);
diff --git a/drivers/usb/host/xhci-plat.h b/drivers/usb/host/xhci-plat.h
index 2b32a93d2b76..00751d851831 100644
--- a/drivers/usb/host/xhci-plat.h
+++ b/drivers/usb/host/xhci-plat.h
@@ -21,6 +21,7 @@ struct xhci_plat_priv {
 	int (*init_quirk)(struct usb_hcd *);
 	int (*suspend_quirk)(struct usb_hcd *);
 	int (*resume_quirk)(struct usb_hcd *);
+	int (*post_resume_quirk)(struct usb_hcd *);
 };
 
 #define hcd_to_xhci_priv(h) ((struct xhci_plat_priv *)hcd_to_xhci(h)->priv)
-- 
2.43.0