arm64: dts: qcom: glymur: Mark USB controllers dma-coherent

All five USB controller nodes on Glymur (usb_0, usb_1, usb_2, usb_hs,
usb_mp) are missing the dma-coherent property, which Hamoa carries on
all of its USB controllers. Krishna Kurapati confirmed the Glymur USB
controllers are dma-coherent [1].

Without the property the kernel treats USB DMA buffers as non-coherent
and performs cache maintenance on every transfer, which coherent
hardware makes redundant.

Tested on an Asus Zenbook A16 (UX3607OA): all controllers enumerate
their devices as before and a 64 MiB write plus two O_DIRECT
read-backs over USB mass storage produce identical checksums.

[1] https://lore.kernel.org/linux-arm-msm/f92cc91e-6e5c-4375-aaa6-f079a165f4b5@oss.qualcomm.com/

Fixes: 4eee57dd4df9 ("arm64: dts: qcom: glymur: Add USB related nodes")
Signed-off-by: Greg Ociepka <greg@ferrisoft.com>
Assisted-by: Claude:fable-5
Reviewed-by: Abel Vesa <abel.vesa@oss.qualcomm.com>
Reviewed-by: Gopikrishna Garmidi <gopikrishna.garmidi@oss.qualcomm.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20260812154014.123315-1-greg@ferrisoft.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>

0 files changed, 0 insertions, 0 deletions