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dt-bindings: usb: snps,dwc3: Add 'snps,resume-hs-terminations' quirk

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Add a new 'snps,resume-hs-terminations' DT quirk to dwc3 core to resolved
issue of CRC failed error.

On the resume path, U3/U2 exit controller fails to send proper CRC checksum
in CRC5 field. As result Transaction Error is generated. Enabling bit 10 of
GUCTL1 will correct this problem.

When this bit is set to '1', the UTMI/ULPI opmode will be changed to
"normal" along with HS terminations and term/xcvr select signals after EOR.
This option is to support certain legacy UTMI/ULPI PHYs.

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Piyush Mehta <piyush.mehta@amd.com>
Link: https://lore.kernel.org/r/20220920052235.194272-2-piyush.mehta@amd.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Piyush Mehta 2022-09-20 10:52:34 +05:30 committed by Greg Kroah-Hartman
parent fc4ade55c6
commit 031cba1695
1 changed files with 7 additions and 0 deletions
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7
Documentation/devicetree/bindings/usb/snps,dwc3.yaml
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@ -239,6 +239,13 @@ properties:
When set, run the SOF/ITP counter based on ref_clk.
type: boolean
snps,resume-hs-terminations:
description:
Fix the issue of HS terminations CRC error on resume by enabling this
quirk. When set, all the termsel, xcvrsel, opmode becomes 0 during end
of resume. This option is to support certain legacy ULPI PHYs.
type: boolean
snps,is-utmi-l1-suspend:
description:
True when DWC3 asserts output signal utmi_l1_suspend_n, false when