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From: Stefan Bethke <stb@lassitu.de>
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Date: Tue, 27 Dec 2011 01:00:59 +0100
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To: Adrian Chadd <adrian@freebsd.org>
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Cc: Oleksandr Tymoshenko <gonzo@freebsd.org>,
	"freebsd-embedded@freebsd.org" <freebsd-embedded@freebsd.org>
Subject: Re: Updated switch/glue patch?
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Am 27.12.2011 um 00:12 schrieb Stefan Bethke:

>=20
> Am 26.12.2011 um 23:17 schrieb Adrian Chadd:
>=20
>> On 26 December 2011 14:13, Stefan Bethke <stb@lassitu.de> wrote:
>>> Am 26.12.2011 um 21:49 schrieb Adrian Chadd:
>>>=20
>>>> I think I was a bit too quick. It turns out that after a few =
minutes
>>>> of uptime, I get the same behaviour from your iicbb changes.
>>>=20
>>> Give me a few moments.  I think I've painted myself into a corner =
with git, so I'm cloning your repo and re-applying my changes against =
that. Shouldn't take more than an hour, I hope.
>>=20
>> I messed up something w/ my git tree earlier today. Sorry :(
>=20
> I see that your TP-WN1043ND.hints has 1 usec delay.  Technically that =
would be too fast; the datasheet says minimum time for SCLK being high =
and low respectively is 4 microseconds.  With the current code, that =
would be hint.iicbb.0.udelay=3D2.
>=20
> I'm building now to test.

With hint.iicbb.0.udelay=3D2 it's working fine, with the delay down to 1 =
the switch chip stops being selected as a slave.


Stefan

--=20
Stefan Bethke <stb@lassitu.de>   Fon +49 151 14070811