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    SubjectRe: [PATCH] platform-driver-x86: ACPI EC Extra driver for Oaktrail
    Hi Yin Kangkai, 

    於 四,2011-01-06 於 11:54 +0100,Corentin Chary 提到:
    > On Thu, Jan 6, 2011 at 11:50 AM, Yin Kangkai
    > <kangkai.yin@linux.intel.com> wrote:
    > > On 2011-01-06, 08:29 +0100, Corentin Chary wrote:
    > >> > + * gps - GPS subsystem enabled: contains either 0 or 1. (rw)
    > >> > + * wifi - WiFi subsystem enabled: contains either 0 or 1. (rw)
    > >> > + * wwan - WWAN (3G) subsystem enabled: contains either 0 or 1. (rw)
    > >>
    > >> Is there a reason do add these files in /sys/devices/platform while the
    > >> functionality is already provided by rfkill ?
    > >
    > > This is not the same functionality.
    > >
    > > enable/disable using files in /sys/devices/platform will completely
    > > cut power of those components. For example, if disabled, you can not
    > > list out those components using lsusb. Can we achieve this using
    > > rfkill?
    > >
    >
    > oh, sorry then, I didn't understood that.
    >
    > So, you're lucky, you can control both the device and the radio. I'm
    > not sure what's
    > the best thing to do here, you can probably keep these files here.
    >
    > CCing Matthew, he may have something to say about that.
    >
    >

    We should used rfkill to provide interface to userland for
    enable/disable wlan/bluetooth/wwan. You can set the killswitch state to
    soft block when your driver call EC function to disable devices.

    Udev/HAL will forward the killswitch change event to userland, then
    userland application can do some response, e.g. show up OSD.
    And, userland app also can control killswitch by /dev/rfkill.

    There also have a urfkill daemon to provide DBus to userland app for
    control killswitch:
    http://freedesktop.org/wiki/Software/urfkill

    Use rfkill interface is more standard then create special sysfs file
    in /sys/devices/platform/intel_oaktrail.


    Thank's a lot!
    Joey Lee


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