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    SubjectRe: ordering of suspend/resume for devices. any clues, anyone?
    heya pavel,

    thanks for the tip. as it turns out, a function table was hacked-n
    that back-link from the w100fb framebuffer resume function into the
    LCD code.

    in this way, it is possible to call functions in the LCD module
    doing GPIO to start the power-up sequence required for the
    LCD and backlight, wait a few ms, initialise the video chip
    (in the w100fb code), then call _another_ set of functions in
    the LCD module to finish off the initialisation.

    not pretty, but there you go.


    On Wed, Dec 21, 2005 at 11:21:09AM +0100, Pavel Machek wrote:
    > Hi!
    > > [hi, please kindly cc me direct as i am deliberately subscribed with
    > > settings to not receive posts from this list, but if that is inconvenient
    > > for you to cc me, don't worry i can always look up the archives
    > > to keep track of replies, thank you.]
    > >
    > >
    > >
    > > works.
    > >
    > > am seeking some advice regarding power management - specifically
    > > the ordering of devices "resume" functions being called.
    > >
    > > we have an LCD, and an ATI chip. switching on the LCD powers up
    > > the ATI chip.
    > >
    > > unfortunately, resume calls the ATI device initialisation
    > > _before_ the LCD resume initialisation. the ATI chip's
    > > initialisation fails - naturally - because it's not even
    > > powered up.
    > I'd say "make LCD system/platform device". That will init it first,
    > shut it down last.
    > Pavel
    > --
    > Thanks, Sharp!

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