From mboxrd@z Thu Jan  1 00:00:00 1970
From: Kevin Hilman <khilman@ti.com>
Subject: Re: [RFC][PATCH 3/9] OMAP4460: HWMOD: DO not reset GPIO1 during HWMOD init
Date: Fri, 27 May 2011 07:59:23 -0700
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In-Reply-To: <BANLkTi=dHknRn5KJSh3_bG-o19BUg2AjrA@mail.gmail.com> (Govindraj's
	message of "Fri, 27 May 2011 12:56:30 +0530")
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To: Govindraj <govindraj.ti@gmail.com>
Cc: "Cousson, Benoit" <b-cousson@ti.com>, "Menon, Nishanth" <nm@ti.com>, linux-omap <linux-omap@vger.kernel.org>, "Sonasath, Moiz" <m-sonasath@ti.com>

Govindraj <govindraj.ti@gmail.com> writes:

> On Fri, May 27, 2011 at 12:40 PM, Cousson, Benoit <b-cousson@ti.com> =
wrote:
>
>     On 5/27/2011 1:24 AM, Hilman, Kevin wrote:
>
>         Nishanth Menon<nm@ti.com> =C2=A0writes:
>
>
>             From: Moiz Sonasath<m-sonasath@ti.com>
>
>             For OMAP4460, GPIO-7 of bank1 is used for controling
>             the TPS modes, hence GPIO1 should not be reset
>             during init as reset will cause the TPS voltage to
>             drop to 0.9 V.
>
>
>         ouch. =C2=A0I knew one of these days something like this was =
going to happen
>         with GPIO resets.
>
>
>     BTW, don't we have the same kind of issue with the debug UART? I =
remember
>     that you had to do some hacks at some point to change these hwmod=
 flags in
>     the UART code.
>
>
> Yes. we use below flags.
>
> uart->oh->flags |=3D HWMOD_INIT_NO_IDLE | HWMOD_INIT_NO_RESET;
>

This is a hack (written by me) because the UART driver is not runtime P=
M
adapted.  When UART driver is runtime PM adapted, this will not be
needed.

Kevin

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