linux-kernel - Re: [PATCH] i2c: imx: remove unnecessary delay at startup

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Message-ID: <YjBDxcTgdjGhWr6k@ninjato>
Date:   Tue, 15 Mar 2022 08:44:05 +0100
From:   Wolfram Sang <wsa@...nel.org>
To:     Oleksij Rempel <o.rempel@...gutronix.de>
Cc:     Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>,
        Ian Dannapel <iansdannapel@...il.com>, linux@...pel-privat.de,
        Erik.Schumacher@...s-sensing.com, shawnguo@...nel.org,
        s.hauer@...gutronix.de, linux-kernel@...r.kernel.org,
        Michael.Glembotzki@...s-sensing.com, linux-imx@....com,
        kernel@...gutronix.de, festevam@...il.com,
        linux-arm-kernel@...ts.infradead.org, linux-i2c@...r.kernel.org
Subject: Re: [PATCH] i2c: imx: remove unnecessary delay at startup


> Maybe. I do not see what exact problem is this sleep addressing. How
> exact the can get stable? Is it addressing some clock issue or wading
> until something happening on the bus?

Yeah, it is really hard to see why it is there. And given that the
introducing commit is from 2009, we can't really expect an active
userbase reporting breakage. So, although it may be a useless delay, I'd
like to see an opt-in approach for not using it.


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