The patch below does not apply to the 4.19-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 6000b8d900cd5f52fbcd0776d0cc396e88c8c2ea Mon Sep 17 00:00:00 2001 From: Johan Hovold johan+linaro@kernel.org Date: Thu, 25 Aug 2022 15:18:36 +0200 Subject: [PATCH] usb: dwc3: disable USB core PHY management
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@chromium.org Cc: stable stable@kernel.org Reviewed-by: Matthias Kaehlcke mka@chromium.org Signed-off-by: Johan Hovold johan+linaro@kernel.org Link: https://lore.kernel.org/r/20220825131836.19769-1-johan+linaro@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
diff --git a/drivers/usb/dwc3/host.c b/drivers/usb/dwc3/host.c index f6f13e7f1ba1..a7154fe8206d 100644 --- a/drivers/usb/dwc3/host.c +++ b/drivers/usb/dwc3/host.c @@ -11,8 +11,13 @@ #include <linux/of.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 void dwc3_host_fill_xhci_irq_res(struct dwc3 *dwc, int irq, char *name) { @@ -92,6 +97,11 @@ 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)