linux-kernel - Re: [PATCH 0/4] mmc: pwrseq: sd8787: add support for selectable

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Date:   Fri, 13 Aug 2021 15:23:56 -0500
From:   Rob Herring <robh@...nel.org>
To:     Claudiu Beznea <claudiu.beznea@...rochip.com>
Cc:     ulf.hansson@...aro.org, nicolas.ferre@...rochip.com,
        alexandre.belloni@...tlin.com, ludovic.desroches@...rochip.com,
        linux-mmc@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 0/4] mmc: pwrseq: sd8787: add support for selectable

On Fri, Aug 06, 2021 at 02:29:57PM +0300, Claudiu Beznea wrote:
> Hi,
> 
> This series adds support for selecting the delay b/w reset and power
> lines on pwrseq-sd8787. With this the driver could also be used by
> other devices (e.g. WILC1000/WILC3000 which needs a delay of 5ms). Along
> with this added the DT bindings for WILC3000 device present on
> SAMA5D27 WLSOM1 board.

A 300ms delay doesn't work? Is powering on the device so timing 
critical?

Add a new compatible for your device and imply the timing from that. 
That way we're not extending the binding a property at a time in a 
poorly designed way for each new timing quirk.

Rob