On Mon, Feb 23, 2009 at 8:10 PM, <ext-eero.nurkk...@nokia.com> wrote: >> I am not entirely sure about the basis of Eero's equation: >> >> scll = (scl+3) * iclk >> sclh = (scl+9) * iclk > > No, no: > > Exactly the opposite, > + fsscll = internal_clk / (dev->speed * 2) - 3; > + fssclh = internal_clk / (dev->speed * 2) - 9; > > means a longer period for scll. (and shorter for sclh) Oops.. copy-paste typo.. :( tLow = (scll+3) * iclk tHigh = (sclh+9) * iclk Vs: TRM: tHigh = ( sclh +5 )*iclk period tLow = ( scll +7 )*iclk period
But my question is this: why are we trying to a different equation here compared to the equation in the TRM? if the reason is that the tLow and tHigh should be a variant based on board, probably precomputed values or run time computed values wont work for all platforms. the board file probably should give it as a platform specific data. if this is not provided, use the run time computation.. just a thought.. Regards, Nishanth Menon -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
