On Thu, Dec 02, 2010 at 05:51:18PM +0100, Linus Walleij wrote:
> From: Ulf Hansson <ulf.hansson@xxxxxxxxxxxxxx>
>
> The Ux500 variant of this block has a different divider.
> The value used right now is too big and which means a loss
> in performance. This fix corrects it.
Err.
> + } else if (variant->st_clkdiv) {
> + clk = ((host->mclk + desired - 1) / desired) - 2;
> + if (clk >= 256)
> + clk = 255;
> + host->cclk = host->mclk / (clk + 2);
This causes the divider to be selected for the 'nearest' frequency.
You are not allowed to _exceed_ the desired frequency - you must
always round down.
IOW, if 10MHz is requested and you can't do 10MHz, 10.5MHz will not
do - you must select a frequency below 10MHz.
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