From: Kevin Hilman <khilman@deeprootsystems.com>
To: Pramod Gurav <pramod.gurav@ti.com>
Cc: linux-omap@vger.kernel.org, Teerth Reddy <teerth@ti.com>,
Vishwanath Sripathy <vishwanath.bs@ti.com>
Subject: Re: [PATCH v4 1/2] OMAP3: SDRC: Dynamic Calculation of SDRC stall latency during DVFS
Date: Thu, 18 Mar 2010 08:09:23 -0700 [thread overview]
Message-ID: <87k4t9mzto.fsf@deeprootsystems.com> (raw)
In-Reply-To: <1268888148-10983-2-git-send-email-pramod.gurav@ti.com> (Pramod Gurav's message of "Thu\, 18 Mar 2010 10\:25\:47 +0530")
Pramod Gurav <pramod.gurav@ti.com> writes:
> From: Teerth Reddy <teerth@ti.com>
>
> The patch has the changes to calculate the dpll3 clock stabilization
> delay dynamically. The SRAM delay is calibrated during bootup using the
> gptimers and used while calculating the stabilization delay. By using
> the dynamic method the dependency on the type of cache being used is
> removed.
>
> The wait time for L3 clock stabilization is calculated using the formula
> = 4*REFCLK + 8*CLKOUTX2,
> which uses the M, N and M2 read from the registers.
> Since this gives slightly less value, 2us is added as buffer for safety.
> This works fine for omap3.
>
> Signed-off-by: Teerth Reddy <teerth@ti.com>
> Signed-off-by: Pramod Gurav <pramod.gurav@ti.com>
> Signed-off-by: Vishwanath Sripathy <vishwanath.bs@ti.com>
OK, I'm now OK with the GP timer usage in this version. The rest will
need to be reviewed/merged by Paul.
Kevin
next prev parent reply other threads:[~2010-03-18 15:09 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-18 4:55 [PATCH 0/2] OMAP3: Dynamic Calculation of SDRC stall latency during DVFS Pramod Gurav
2010-03-18 4:55 ` [PATCH v4 1/2] OMAP3: SDRC: " Pramod Gurav
2010-03-18 4:55 ` [PATCH v2 2/2] OMAP3630 SDRC: Change in DVFS Latency Formula for OMAP3630 Pramod Gurav
2010-03-18 7:17 ` ambresh
2010-03-19 13:17 ` Sripathy, Vishwanath
2010-03-23 2:49 ` ambresh
2010-03-18 6:17 ` [PATCH v4 1/2] OMAP3: SDRC: Dynamic Calculation of SDRC stall latency during DVFS G, Manjunath Kondaiah
2010-03-18 14:48 ` Kevin Hilman
2010-03-18 7:15 ` ambresh
2010-03-19 13:15 ` Sripathy, Vishwanath
2010-03-21 13:24 ` ambresh
2010-03-18 15:09 ` Kevin Hilman [this message]
-- strict thread matches above, loose matches on Subject: below --
2010-04-01 17:16 [PATCH V4 0/2] OMAP3: " Pramod Gurav
2010-04-01 17:16 ` [PATCH v4 1/2] OMAP3: SDRC: " Pramod Gurav
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