Re: [RFC][PATCH 3/9] OMAP4460: HWMOD: DO not reset GPIO1 during HWMOD init

[Kevin Hilman <khilman@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>  writes:
>
>
>             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.  I 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 |= HWMOD_INIT_NO_IDLE | HWMOD_INIT_NO_RESET;
>

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

Kevin

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