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    SubjectRe: [PATCH 4/8] regmap: Add the LZO cache support
    On Mon, Sep 05, 2011 at 09:40:45PM +0000, Matthieu CASTET wrote:
    > Dimitris Papastamos <dp <at>> 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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