linux-kernel - Re: [PATCH v2 1/2] mfd: madera: Increase wait time for silicon reset

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Message-ID: <20181002105548.GR1653@imbe.wolfsonmicro.main>
Date:   Tue, 2 Oct 2018 11:55:48 +0100
From:   Charles Keepax <ckeepax@...nsource.cirrus.com>
To:     Richard Fitzgerald <rf@...nsource.cirrus.com>
CC:     <lee.jones@...aro.org>, <patches@...nsource.cirrus.com>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 1/2] mfd: madera: Increase wait time for silicon reset

On Tue, Oct 02, 2018 at 11:41:33AM +0100, Richard Fitzgerald wrote:
> Based on latest silicon validation, we should allow at least
> 2 milliseconds after DCVDD enable or hard reset before trying
> to communicate with the silicon.
> 
> Previously the delay was done as a side-effect of
> madera_disable_hard_reset(). As we also need this delay when
> enabling DCVDD (with or without hard reset) it is better for it
> to be obvious where it happens in every power-up sequence rather
> than hidden within another call in some cases. So it has been
> moved out into a separate function call.
> 
> Signed-off-by: Richard Fitzgerald <rf@...nsource.cirrus.com>
> ---

Reviewed-by: Charles Keepax <ckeepax@...nsource.cirrus.com>

Thanks,
Charles