[PATCH 8/9] usb: host: xhci-plat: allow upper layers to signal power loss

Théo Lebrun
2025-01-29T10:56:25Z

Now that xhci_resume() exposes a power_lost boolean argument, expose
that to all xhci-plat implementations. They are free to set it from
wherever they want:
- Their own resume() callback.
- The xhci_plat_priv::resume_quirk() callback.

Signed-off-by: Théo Lebrun <theo.lebrun@bootlin.com>
---
drivers/usb/host/xhci-plat.c | 3 ++-
drivers/usb/host/xhci-plat.h | 1 +
2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index 831af518a6ec..8b18494ccc41 100644
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -479,6 +479,7 @@ static int xhci_plat_suspend(struct device *dev)
static int xhci_plat_resume_common(struct device *dev, bool power_lost)
{
struct usb_hcd *hcd = dev_get_drvdata(dev);
+ struct xhci_plat_priv *priv = hcd_to_xhci_priv(hcd);
struct xhci_hcd *xhci = hcd_to_xhci(hcd);
int ret;

@@ -498,7 +499,7 @@ static int xhci_plat_resume_common(struct device *dev, bool power_lost)
if (ret)
goto disable_clks;

- ret = xhci_resume(xhci, power_lost, false);
+ ret = xhci_resume(xhci, power_lost || priv->power_lost, false);
if (ret)
goto disable_clks;

diff --git a/drivers/usb/host/xhci-plat.h b/drivers/usb/host/xhci-plat.h
index 6475130eac4b..fe4f95e690fa 100644
--- a/drivers/usb/host/xhci-plat.h
+++ b/drivers/usb/host/xhci-plat.h
@@ -15,6 +15,7 @@ struct usb_hcd;
struct xhci_plat_priv {
const char *firmware_name;
unsigned long long quirks;
+ bool power_lost;
void (*plat_start)(struct usb_hcd *);
int (*init_quirk)(struct usb_hcd *);
int (*suspend_quirk)(struct usb_hcd *);
--
2.48.1