Messages in this thread | | | Date | Wed, 7 Sep 2011 20:19:01 +0100 | From | Mark Brown <> | Subject | Re: [PATCH 4/8] regmap: Add the LZO cache support |
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On Mon, Sep 05, 2011 at 09:40:45PM +0000, Matthieu CASTET wrote: > Dimitris Papastamos <dp <at> opensource.wolfsonmicro.com> writes:
Don't drop CCs from mails if you want people to actually read them.
> > This patch adds support for LZO compression when storing the register > > cache.
> > For a typical device whose register map would normally occupy 25kB or 50kB > > by using the LZO compression technique, one can get down to ~5-7kB.
> Do you have example of such case ?
> Caching 25kB or 50kB looks crazy.
Audio CODECs for smartphones can easily have well over a thousand registers (excluding things like DSP memories) connected over rel;atively slow buses like I2C or SPI with lots of read/modify/write cycles (so cutting out the physical read is a real win) and we want to power them off when not in use.
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