usb: dwc3: Move GUID programming after PHY initialization

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[ Upstream commit aad35f9c92 ]

The Linux Version Code is currently written to the GUID register before
PHY initialization. Certain PHY implementations (such as Synopsys eUSB
PHY performing link_sw_reset) clear the GUID register to its default
value during initialization, causing the kernel version information to
be lost.

Move the GUID register programming to occur after PHY initialization
completes to ensure the Linux version information persists.

Fixes: fa0ea13e9f ("usb: dwc3: core: write LINUX_VERSION_CODE to our GUID register")
Cc: stable <stable@kernel.org>
Reported-by: Pritam Manohar Sutar <pritam.sutar@samsung.com>
Signed-off-by: Selvarasu Ganesan <selvarasu.g@samsung.com>
Acked-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Link: https://patch.msgid.link/20260417063314.2359-1-selvarasu.g@samsung.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[ adapted dwc3_writel(dwc, ...) to dwc3_writel(dwc->regs, ...) ]
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Selvarasu Ganesan 2026-05-13 09:53:34 -04:00 • committed by Greg Kroah-Hartman

parent df2e90d6a9

commit e589ee5dcc

1 changed files with 6 additions and 6 deletions

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drivers/usb/dwc3/core.c

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