RE: [PATCH] OMAP3: PM: Dynamic calculation of SDRC clock stabilization delay

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Hi Paul,

> -----Original Message-----
> From: Paul Walmsley [mailto:paul@xxxxxxxxx]
> Sent: Thursday, January 21, 2010 11:05 AM
> To: Reddy, Teerth
> Cc: Kevin Hilman; linux-omap@xxxxxxxxxxxxxxx
> Subject: Re: [PATCH] OMAP3: PM: Dynamic calculation of SDRC clock
> stabilization delay
> 
> Hi Teerth,
> 
> any update on Kevin's comments?
> 
> This patch shouldn't use a hardcoded value.  Please explain further why
> that formula can't be included...

Time required to switch clocks -
4 REFCLKS + 2 CLKOUTX2
Gives a small number which doesn't seem to work and causes instability during DVFS. I found that the value of 6us is safe and stable for the DVFS.I tried this value on OMAP3430 sdp, zoom2 and zoom3 and it worked fine.
I will let you know more about the formula once I get the updates.

Regards
Teerth

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