On Thu, 2011-04-07 at 18:18 +0200, Anisse Astier wrote:
> Pegatron Lucid tablet sends an ACPI hotkey event(0xEA) when the
> accelerometer detects coarse orientation change. My initial thought was
> to just translate this event into KEY_DIRECTION, which seems to be the
> norm from what we can see in hp-wmi driver. (See patch below for an
> implementation.)
>
> But this isn't just a key per se like on the HP touchsmart tablet, this
> is an event that is triggered when the device is rotated.
>
> This could be defined as a new Misc (EV_MSC) event:
> MSC_ORIENTATION_CHANGED ?
>
> Or we could use the upcoming IIO subsystem which is supposed to be for
> sensors, but then we'd have a mismatch between the device based on ACPI
> with firmware in the middle (driver submitted by Andy Ross) and the
> purpose of IIO ("SPI or I2C device").
How would one know which orientation the device is now in, either from
the event, or when the orientation already changed? How would this be
"key" to user-space in general, and X in particular?
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