[PATCH v5 02/14] ARM: OMAP2+: gpmc: Adapt to HWMOD

Paul Walmsley paul at pwsan.com
Thu Jun 14 20:20:57 EDT 2012

On Thu, 14 Jun 2012, Jon Hunter wrote:

> What does make this a bit more difficult is the function
> gpmc_round_ns_to_ticks(). It appears to convert nanoseconds to ticks and
> back to nanoseconds. I am guessing to account for some rounding error. I
> am curious what impact this function is having on the timing. Ideally
> this should be handle in gpmc_cs_set_timings().

I don't have the code in front of me at the moment, nor my old GPMC timing 
spreadsheet, so this comment may be superfluous.  But since kernel 
arithmetic needs to be in integers, it might be necessary to do some of 
the timing calculations in picosecond units to avoid roundoff issues.

- Paul

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