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From: Wolfram Sang <wsa+renesas@sang-engineering.com>
To: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Cc: Wojciech Siudy <wojciech.siudy@nokia.com>, linux-i2c@vger.kernel.org
Subject: Re: [Bug report]: "i2c: muxes: pca954x: Use reset controller only" makes I2C break
Date: Wed, 15 Oct 2025 12:56:48 +0200	[thread overview]
Message-ID: <aO998KSukVoMuWYU@ninjato> (raw)
In-Reply-To: <87a51um1y1.wl-kuninori.morimoto.gx@renesas.com>

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Hi Morimoto-san,

> I noticed that this commit breaks Renesas ULCB board Sound which is using I2C.
> 
> 	690de2902dca98aec96de004428c020ca902f047 (HEAD)
> 	("i2c: muxes: pca954x: Use reset controller only")
> 
> Before this patch, sound works correctly, but after this patch, sound cann't
> work.

Confirmed. You need to enable CONFIG_RESET_GPIO in your .config. The
reset-framework won't do the fallback without the driver. I will discuss
this issue with them.

Thanks for the report!

   Wolfram


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      parent reply	other threads:[~2025-10-15 10:56 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-10-14  6:28 [Bug report]: "i2c: muxes: pca954x: Use reset controller only" makes I2C break Kuninori Morimoto
2025-10-14  6:47 ` Wolfram Sang
2025-10-15 10:56 ` Wolfram Sang [this message]

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