From: Mark Brown <broonie@opensource.wolfsonmicro.com>
To: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Cc: sameo@linux.intel.com, patches@opensource.wolfsonmicro.com,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] mfd: arizona: Move chip reset to before register patch
Date: Tue, 13 Nov 2012 14:56:20 +0900 [thread overview]
Message-ID: <20121113055618.GC18224@opensource.wolfsonmicro.com> (raw)
In-Reply-To: <20121112175648.GA29044@opensource.wolfsonmicro.com>
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On Mon, Nov 12, 2012 at 05:56:48PM +0000, Charles Keepax wrote:
> In the absence of a physical reset line the chip is reset by writing the
> first register, this was done after the register patch was applied which
> negates the settings applied in the register patch.
>
> This patch moves the reset to take place before the register patch is
> applied.
No, we should never write to the chip until we have successfully
identified it. Do a sync or similar instead (we should be triggering
this very soon afterwards via runtime PM anyway).
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next prev parent reply other threads:[~2012-11-13 5:56 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-12 17:56 [PATCH] mfd: arizona: Move chip reset to before register patch Charles Keepax
2012-11-13 5:56 ` Mark Brown [this message]
2012-11-13 13:12 ` Charles Keepax
2012-11-14 1:20 ` Mark Brown
2012-11-14 10:48 ` Charles Keepax
2012-11-14 10:51 ` Mark Brown
2012-11-14 11:31 ` [PATCH v2] mfd: arizona: Sync regcache after reset Charles Keepax
2012-11-14 11:34 ` Mark Brown
2012-11-14 11:45 ` Charles Keepax
2012-11-15 14:55 ` [PATCH v3] " Charles Keepax
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