[PATCHv5] omap3: Add basic support for 720MHz part
laurent.pinchart at ideasonboard.com
Fri Jun 22 05:33:51 EDT 2012
On Thursday 10 February 2011 08:45:00 Kevin Hilman wrote:
> Sanjeev Premi <premi at ti.com> writes:
> > This patch adds support for speed enhanced variant of OMAP35x
> > processors. These parts allow ARM and IVA running at 720MHz
> > and 520MHz respectively.
> > These parts can be detected at runtime by reading contents of
> > PRODID.SKUID[3:0] at 0x4830A20C .
> > This patch specifically does following:
> > * Add new OPP to omap34xx_opp_def_list - disabled by default.
> > * Detect devices capable of running at new OPP.
> > * Enable new OPP only if device supports it.
> > * Check for presence of IVA before attempting to enable the
> > corresponding OPP.
> >  http://focus.ti.com/lit/ug/spruff1d/spruff1d.pdf
> > It appears from discussions (on this patch) that a variant of
> > OMAP3430 supports this OPP but lacks runtime detection. This
> > OPP can be enabled for these device by either:
> > 1) Setting the bit corresponding to OMAP3_HAS_720MHZ
> > in 'omap3_features'. (Refer changes to id.c)
> > 2) Removing check for omap3_has_720mhz() before enabling
> > the OPP. (Refer changes to opp3xxx_data.c)
> > 3) Calling opp_enable() for 720MHz/VDD1 and 520MHz/VDD2 in
> > the board file. (Refer changes to opp3xxx_data.c).
> > This should, ideally, be done before omap3_opp_init() is
> > called during device_initcall().
> > CAUTION: This should be done for identified parts only.
> > Else, the device could be damaged permanently.
> > Signed-off-by: Sanjeev Premi <premi at ti.com>
> > Reviewed-by: G, Manjunath Kondaiah <manjugk at ti.com>
> Acked-by: Kevin Hilman <khilman at ti.com>
This patch seems to never have made it upstream. Is there a reason for that ?
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