linux-kernel - Re: [PATCH v5 1/1] i2c: mediatek: add runtime PM operations and bus regulator control

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Message-ID: <em2y3tkiwlxc45f4sjtzdd3oy4v5zpqgdpqfppyzah2ilzidg2@wn6cnrezygpl>
Date: Fri, 21 Mar 2025 01:34:02 +0100
From: Andi Shyti <andi.shyti@...nel.org>
To: Daniel Golle <daniel@...rotopia.org>
Cc: Zoie Lin <zoie.lin@...iatek.com>, Qii Wang <qii.wang@...iatek.com>, 
	Matthias Brugger <matthias.bgg@...il.com>, 
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>, Project_Global_Chrome_Upstream_Group@...iatek.com, 
	linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-arm-kernel@...ts.infradead.org, linux-mediatek@...ts.infradead.org, teddy.chen@...iatek.com, 
	joseph-cc.chang@...iatek.com, leilk.liu@...iatek.com, John Crispin <john@...ozen.org>
Subject: Re: [PATCH v5 1/1] i2c: mediatek: add runtime PM operations and bus
 regulator control

Hi Daniel,

On Thu, Mar 20, 2025 at 10:08:42PM +0000, Daniel Golle wrote:
> On Wed, Mar 19, 2025 at 12:34:53AM +0100, Andi Shyti wrote:
> > On Fri, Mar 14, 2025 at 10:53:43PM +0800, Zoie Lin wrote:
> > > Introduce support for runtime PM operations in
> > > the I2C driver, enabling runtime suspend and resume functionality.
> > > 
> > > Although in most platforms, the bus power of i2c is always
> > > on, some platforms disable the i2c bus power in order to meet
> > > low power request.
> > > 
> > > This implementation includes bus regulator control to facilitate
> > > proper handling of the bus power based on platform requirements.
> > > 
> > > Signed-off-by: Zoie Lin <zoie.lin@...iatek.com>
> > 
> > merged to i2c/i2c-host.
> 
> the change causes a crash during boot on MT7988 which typically uses
> one of its I2C busses to connect a Richtek RT5190A PMIC.

Thanks a lot for testing it. I removed the commit.

Andi