u-boot.git/drivers/usb/dwc3, branch master

global: Correct duplicate U_BOOT_DRIVER entry names

2026-04-07T17:32:56+00:00

The U_BOOT_DRIVER macro creates a list of drivers used at link time, and
all entries here must be unique. This in turn means that all entries in
the code should also be unique in order to not lead to build failures
later with unexpected build combinations. Typically, the problem we have
here is when a driver is obviously based on another driver and didn't
update this particular field and so while the name field reflects
something unique the linker entry itself is not. In a few places this
provides a more suitable string name as well, however.

Reviewed-by: Marek Vasut 
Reviewed-by: Svyatoslav Ryhel  # Tegra
Reviewed-by: Peter Robinson 
Reviewed-by: Heiko Schocher 
Reviewed-by: Simon Glass 
Signed-off-by: Tom Rini

usb: dwc3: core: improve reset sequence

2026-01-30T07:59:21+00:00

According to Synopsys Databook, we shouldn't be
relying on GCTL.CORESOFTRESET bit as that's only for
debugging purposes. Instead, let's use DCTL.CSFTRST
if we're OTG or PERIPHERAL mode.

Host side block will be reset by XHCI driver if
necessary. Note that this reduces amount of time
spent on dwc3_probe() by a long margin.

We're still gonna wait for reset to finish for a
long time (default to 1ms max), but tests show that
the reset polling loop executed at most 19 times
(modprobe dwc3 && modprobe -r dwc3 executed 1000
times in a row).

Note that this patch was submitted to Linux in 2016 [1], however I can
confirm it is needed to support gadget mode in U-Boot on my device.
While I am referencing this patch from Linux I am in fact taking the
full existing dwc3_core_soft_reset() function from Linux as it exists
in v6.19-rc5, so it may differ slightly from the information in the
2016 patch.

[1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/patch/drivers/usb/dwc3?id=f59dcab176293b646e1358144c93c58c3cda2813

Suggested-by: Mian Yousaf Kaukab 
Signed-off-by: Felipe Balbi 
Signed-off-by: Chris Morgan 
Reviewed-by: Mattijs Korpershoek 
Link: https://lore.kernel.org/r/20260115230135.183158-5-macroalpha82@gmail.com
Signed-off-by: Mattijs Korpershoek

usb: dwc3: gadget: Don't send unintended link state change

2026-01-30T07:59:21+00:00

DCTL.ULSTCHNGREQ is a write-only field. When doing a read-modify-write
to DCTL, the driver must make sure that there's no unintended link state
change request from whatever is read from DCTL.ULSTCHNGREQ. Set link
state change to no-action when the driver writes to DCTL.

Note that this patch was submitted upstream in Linux in 2020 [1],
and I've confirmed I need it in U-Boot to enable gadget mode.

[1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/patch/drivers/usb/dwc3?id=5b738211fb59e114727381d07c647a77c0010996

Signed-off-by: Thinh Nguyen 
Signed-off-by: Chris Morgan 
Reviewed-by: Mattijs Korpershoek 
Link: https://lore.kernel.org/r/20260115230135.183158-4-macroalpha82@gmail.com
Signed-off-by: Mattijs Korpershoek

usb: dwc3: Increase DWC3 controller halt timeout

2026-01-30T07:59:21+00:00

Since EP0 transactions need to be completed before the controller halt
sequence is finished, this may take some time depending on the host and the
enabled functions.  Increase the controller halt timeout, so that we give
the controller sufficient time to handle EP0 transfers.

This patch was originally submitted to Linux in 2022, but is required to
use USB gadget mode on my device in U-Boot.

[1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=461ee467507cb98a348fa91ff8460908bb0ea423

Signed-off-by: Wesley Cheng 
Signed-off-by: Chris Morgan 
Reviewed-by: Mattijs Korpershoek 
Link: https://lore.kernel.org/r/20260115230135.183158-3-macroalpha82@gmail.com
Signed-off-by: Mattijs Korpershoek

usb: dwc3: core: Add ip and version_type support from Linux

2026-01-30T07:59:21+00:00

Add support for the ip and version_type fields from the Linux
version of the dwc3 driver. Included in this is support for a
few additional macros in the header from Linux as well.

Signed-off-by: Chris Morgan 
Reviewed-by: Mattijs Korpershoek 
Link: https://lore.kernel.org/r/20260115230135.183158-2-macroalpha82@gmail.com
Signed-off-by: Mattijs Korpershoek

usb: dwc3-generic: support Qualcomm flattened DT

2026-01-16T18:02:13+00:00

Qualcomm devicetrees are moving away from having a glue node with dwc3
as a subnode and now may just have a single flattened node.

Rockchip already have a glue_get_ctrl_dev op which returns the node for
the glue device itself, commonise this and reuse it for the new Qualcomm
node.

Lastly adjust the qscratch base address since it now requires an offset
from the dwc3 base.

Link: https://patch.msgid.link/20260116-casey-usb-role-switch-v2-1-83a1a6501a11@linaro.org
Signed-off-by: Casey Connolly

usb: dwc3: qcom: Add delays in UTMI clock selection for Qscratch

2026-01-14T15:17:48+00:00

Added delays before and after setting the PIPE_UTMI_CLK_SEL and
PIPE3_PHYSTATUS_SW bits in the Qscratch GENERAL_CFG register
during UTMI clock selection for DWC3 on Qualcomm platforms.

These delays help ensure proper timing and stability of the UTMI
clock switching sequence, potentially avoiding race conditions or
unstable PHY behavior during initialization.

Tested on platforms using Qscratch-based DWC3 PHY configuration.

This change is taken from this Linux kernel implementation:
https://web.git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/usb/dwc3/dwc3-qcom.c?id=a4333c3a6ba9ca9cff50a3c1d1bf193dc5489e1c

Signed-off-by: Balaji Selvanathan 
Reviewed-by: Neil Armstrong 
Reviewed-by: Mattijs Korpershoek 
Link: https://patch.msgid.link/20250627045244.2225303-1-balaji.selvanathan@oss.qualcomm.com
Signed-off-by: Casey Connolly

Merge patch series "Enable / require DEVRES for devm_.alloc usage outside xPL"

2026-01-09T16:19:57+00:00

Tom Rini  says:

As seen by a number of patches fixing memory leaks, U-Boot has a problem
with developer expectations around devm_kmalloc and friends. Namely,
whereas in Linux these memory allocations will be freed automatically in
most cases, in U-Boot this is only true if DEVRES is enabled. Now,
intentionally, in xPL phases, we do not (and do not offer as an option)
enabling DEVRES. However in full U-Boot this is left either to the user,
or some drivers have select'd DEVRES on their own. This inconsistency is
a problem. This series goes and deals with two small issues that were
shown by having all drivers that use devm_.alloc to allocate memory also
select DEVRES and then we make DEVRES no longer be a prompted option and
instead select'd as needed. We do not make this unconditional as it
would result in growing the resulting binary on the many platforms which
have no users of the devm_.alloc family of functions.

Link: https://lore.kernel.org/r/20251227223833.3019311-1-trini@konsulko.com

dm: core: Default to using DEVRES outside of xPL

2026-01-09T15:08:14+00:00

The devm alloc functions that we have may follow the Linux kernel model
where allocations are (almost always) automatically free()'d. However,
quite often we don't enable, in full U-Boot, the tracking and free()'ing
functionality. This in turn leads to memory leaks because the driver
author expects that since the functions have the same name as in the
Linux Kernel they have the same behavior. In turn we then get
functionally correct commits such as commit 00e1fed93c8c ("firmware:
ti_sci: Fix memory leaks in devm_ti_sci_get_of_resource") that manually
add these calls. Rather than manually tracking allocations and
implementing free()s, rework things so that we follow expectations by
enabling the DEVRES functionality (outside of xPL phases).

This turns DEVRES from a prompted symbol to a symbol that must be
select'd, and we now remove our non-managed alloc/free functions from
outside of xPL builds.

Reviewed-by: Michael Trimarchi 
Signed-off-by: Tom Rini

usb: dwc3-generic: add support for exynos7870

2026-01-08T14:13:19+00:00

Exynos7870's DWC3 glue layer is quite simple, consisting of a few
clocks, which is handled by this driver. Add the compatible string in
here.

Reviewed-by: Marek Vasut 
Signed-off-by: Kaustabh Chakraborty