linux-kernel - [PATCH stable-5.15 3/3] usb: dwc3: disable USB core PHY management

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Message-Id: <20220906120702.19219-4-johan@kernel.org>
Date:   Tue,  6 Sep 2022 14:07:02 +0200
From:   Johan Hovold <johan@...nel.org>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     stable@...r.kernel.org, linux-kernel@...r.kernel.org,
        Johan Hovold <johan+linaro@...nel.org>,
        Matthias Kaehlcke <mka@...omium.org>,
        stable <stable@...nel.org>
Subject: [PATCH stable-5.15 3/3] usb: dwc3: disable USB core PHY management

From: Johan Hovold <johan+linaro@...nel.org>

commit 6000b8d900cd5f52fbcd0776d0cc396e88c8c2ea upstream.

The dwc3 driver manages its PHYs itself so the USB core PHY management
needs to be disabled.

Use the struct xhci_plat_priv hack added by commits 46034a999c07 ("usb:
host: xhci-plat: add platform data support") and f768e718911e ("usb:
host: xhci-plat: add priv quirk for skip PHY initialization") to
propagate the setting for now.

Fixes: 4e88d4c08301 ("usb: add a flag to skip PHY initialization to struct usb_hcd")
Fixes: 178a0bce05cb ("usb: core: hcd: integrate the PHY wrapper into the HCD core")
Tested-by: Matthias Kaehlcke <mka@...omium.org>
Cc: stable <stable@...nel.org>
Reviewed-by: Matthias Kaehlcke <mka@...omium.org>
Signed-off-by: Johan Hovold <johan+linaro@...nel.org>
Link: https://lore.kernel.org/r/20220825131836.19769-1-johan+linaro@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
[ johan: adjust context to 5.15 ]
Signed-off-by: Johan Hovold <johan+linaro@...nel.org>
---
 drivers/usb/dwc3/host.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/usb/dwc3/host.c b/drivers/usb/dwc3/host.c
index 2078e9d70292..85165a972076 100644
--- a/drivers/usb/dwc3/host.c
+++ b/drivers/usb/dwc3/host.c
@@ -10,8 +10,13 @@
 #include <linux/acpi.h>
 #include <linux/platform_device.h>
 
+#include "../host/xhci-plat.h"
 #include "core.h"
 
+static const struct xhci_plat_priv dwc3_xhci_plat_priv = {
+	.quirks = XHCI_SKIP_PHY_INIT,
+};
+
 static int dwc3_host_get_irq(struct dwc3 *dwc)
 {
 	struct platform_device	*dwc3_pdev = to_platform_device(dwc->dev);
@@ -87,6 +92,11 @@ int dwc3_host_init(struct dwc3 *dwc)
 		goto err;
 	}
 
+	ret = platform_device_add_data(xhci, &dwc3_xhci_plat_priv,
+					sizeof(dwc3_xhci_plat_priv));
+	if (ret)
+		goto err;
+
 	memset(props, 0, sizeof(struct property_entry) * ARRAY_SIZE(props));
 
 	if (dwc->usb3_lpm_capable)
-- 
2.35.1