linux-kernel - Re: [PATCH v1 2/2] ASoC: codecs: wsa883x: Handle shared reset GPIO for WSA883x speakers

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Message-ID: <f752cf84-0159-4ef6-a7cd-57b6fc578a74@kernel.org>
Date: Mon, 23 Jun 2025 10:01:44 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>,
 Mohammad Rafi Shaik <mohammad.rafi.shaik@....qualcomm.com>,
 Srinivas Kandagatla <srini@...nel.org>, Liam Girdwood <lgirdwood@...il.com>,
 Mark Brown <broonie@...nel.org>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Jaroslav Kysela <perex@...ex.cz>,
 Takashi Iwai <tiwai@...e.com>, Philipp Zabel <p.zabel@...gutronix.de>,
 Linus Walleij <linus.walleij@...aro.org>, Bartosz Golaszewski <brgl@...ev.pl>
Cc: linux-arm-msm@...r.kernel.org, linux-sound@...r.kernel.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-gpio@...r.kernel.org, quic_pkumpatl@...cinc.com,
 kernel@....qualcomm.com
Subject: Re: [PATCH v1 2/2] ASoC: codecs: wsa883x: Handle shared reset GPIO
 for WSA883x speakers

On 20/06/2025 20:35, Dmitry Baryshkov wrote:
> On 20/06/2025 13:30, Mohammad Rafi Shaik wrote:
>> On some Qualcomm platforms, such as QCS6490-RB3Gen2 and QCM6490-IDP,
>> multiple WSA8830/WSA8835 speakers share a common reset (shutdown) GPIO.
>> To handle such cases, use the reset controller framework along with the
>> "reset-gpio" driver.
> 
> How does this handle the fact that resetting one codec will also 
> silently reset another one?
Will not, that's the entire point of reset framework. See also my talk
from last year OSS NA for some graphs/explanations.

Best regards,
Krzysztof