From 53eed9adfac17921511ebf9e00c429bcb385d231 Mon Sep 17 00:00:00 2001 From: Mark Kettenis Date: Thu, 16 Sep 2021 16:00:09 +0200 Subject: [PATCH] usb: xhci-dwc3: Add support for USB 3.1 controllers This adds support for the DWC_sub31 controllers such as those found on Apple's M1 SoC. This version of the controller seems to work fine with the existing driver. Signed-off-by: Mark Kettenis --- drivers/usb/host/xhci-dwc3.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/usb/host/xhci-dwc3.c b/drivers/usb/host/xhci-dwc3.c index 5b12d13..bec0d98 100644 --- a/drivers/usb/host/xhci-dwc3.c +++ b/drivers/usb/host/xhci-dwc3.c @@ -74,7 +74,8 @@ int dwc3_core_init(struct dwc3 *dwc3_reg) revision = readl(&dwc3_reg->g_snpsid); /* This should read as U3 followed by revision number */ - if ((revision & DWC3_GSNPSID_MASK) != 0x55330000) { + if ((revision & DWC3_GSNPSID_MASK) != 0x55330000 && + (revision & DWC3_GSNPSID_MASK) != 0x33310000) { puts("this is not a DesignWare USB3 DRD Core\n"); return -1; } -- 2.7.4