linux-kernel - Re: [PATCH v3 0/3] usb: meson: fix shared reset control use

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Message-ID: <7htug854kb.fsf@baylibre.com>
Date:   Fri, 19 Nov 2021 11:27:32 -0800
From:   Kevin Hilman <khilman@...libre.com>
To:     Amjad Ouled-Ameur <aouledameur@...libre.com>
Cc:     Amjad Ouled-Ameur <aouledameur@...libre.com>,
        p.zabel@...gutronix.de, balbi@...nel.org, jbrunet@...libre.com,
        linux-amlogic@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-usb@...r.kernel.org
Subject: Re: [PATCH v3 0/3] usb: meson: fix shared reset control use

Amjad Ouled-Ameur <aouledameur@...libre.com> writes:

> This patchset fixes a usb suspend warning seen on the libretech-cc by
> using reset_control_rearm() call of the reset framework API. 
> This call allows a reset consummer to release the reset line even when 
> just triggered so that it may be triggered again by other reset
> consummers.
>
> reset_control_(de)assert() calls are called, in some meson usb drivers, 
> on a shared reset line when reset_control_reset has been used. This is not
> allowed by the reset framework.
>
> Finally the meson usb drivers are updated to use this new call, which
> solves the suspend issue addressed by the previous reverted 
> commit 7a410953d1fb ("usb: dwc3: meson-g12a: fix shared reset control
> use").

Tested-by: Kevin Hilman <khilman@...libre.com>

Tested suspend/resume on Khadas VIM3 and confirmed that the reset
warnings are gone.

Kevin