[U-Boot] AM/DM37X How to configure registers to get 1000MHz

[Premi, Sanjeev]

> -----Original Message-----
> From: Enric Balletbò i Serra [mailto:eballetbo at gmail.com] 
> Sent: Friday, November 19, 2010 6:30 PM
> To: Premi, Sanjeev
> Cc: u-boot at lists.denx.de; Steve Sakoman
> Subject: Re: [U-Boot] AM/DM37X How to configure registers to 
> get 1000MHz
> 
> Hi,
> 
> Thanks for your reply
> 
> 2010/11/19 Premi, Sanjeev <premi at ti.com>:
> >> -----Original Message-----
> >> From: u-boot-bounces at lists.denx.de
> >> [mailto:u-boot-bounces at lists.denx.de] On Behalf Of Enric
> >> Balletbò i Serra
> >> Sent: Friday, November 19, 2010 2:42 PM
> >> To: u-boot at lists.denx.de; Steve Sakoman
> >> Subject: [U-Boot] AM/DM37X How to configure registers to 
> get 1000MHz
> >>
> >> Hi all,
> >>
> >> I would ask a question, maybe someone can help, which is the better
> >> way to configure the PRCM registers to get 1000MHz on AM/DM37X
> >> processor ?
> >
> > You need set the multipliers and dividers apprioriately - 
> based on the
> > sysclk.
> >
> > Would help to understand the context of "better"?
> 
> I'm thinking in two scenarios :
> 
> 1. For OMAP35X there are devices that support 600MHz as max frequency
> but others supports 720MHz, I want to set by default 600MHz and if
> device supports 720MHz change to this frequency.

[sp] You can look at one of my patches on linux kernel to identify the
     device capability for 600/720MHz.

> 2. For AM/DM37X, maybe I'm wrong, but the default frequency for
> AM/DM37X is set to 600MHz, Like OMAP35X i want to set default to
> 800MHz and i device supports change to 1000MHz.

[sp] The device comes up at 600MHz for now, but there is no limitation
     on device to go all the way to 1GHz.

> 
> Which is the better way to do this ?

[sp] So, you are looking for common mechanism to go to highest supported
     frequency. Right?

> 
> Thanks in advance,
>    Enric
> 
> >
> > ~sanjeev
> >
> >>
> >> Thanks in advance,
> >>    Enric
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