linux-kernel - Re: [PATCH] Revert "drivers/misc/ti-st: remove gpio handling"

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Message-ID: <50FFA7F5.1000104@ti.com>
Date:	Wed, 23 Jan 2013 10:05:57 +0100
From:	Peter Ujfalusi <peter.ujfalusi@...com>
To:	Luciano Coelho <coelho@...com>
CC:	Tony Lindgren <tony@...mide.com>, <gregkh@...uxfoundation.org>,
	<balbi@...com>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] Revert "drivers/misc/ti-st: remove gpio handling"

On 01/23/2013 10:04 AM, Peter Ujfalusi wrote:
> On 01/22/2013 10:31 PM, Luciano Coelho wrote:
>> I thought about checking exactly what we need as delays and whether we
>> really need to do all that toggling.  At least in some boards, the
>> toggles are not needed, but I don't know for sure whether it works in
>> all different variations of the chip, so I kept them to be safe.  Also,
>> I tried to deviate as little as possible from a plain revert, since I'd
>> like to get this into stable as well.
> 
> I can not find the documentation for the WiLink, but I would guess that it
> needs some delay between high->low(off)->(wait)->high(on)->(power-on-time)->up

But mdelay() looks a bit overkill IMHO.

-- 
Péter
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