Re: [PATCH] input: enable / disable methods with sysfs entry

[Mark Brown <broonie@opensource.wolfsonmicro.com>]

On Thu, Dec 03, 2009 at 12:58:19PM +0200, Samu Onkalo wrote:
> Add optional enable and disable methods to input system.
> Add sysfs entry for enabling and disabling input device.

> When registering a device to input system, device can provide
> optional enable and disable methods. State is set to enabled by default.
> Opening / closing the input device doesn't change the state.
> If the callback functions are not provided, sysfs entry returns
> ENOSYS error code.

I'm wondering if it might be nice to provide a default implementation
which causes the input core to ignore the events generated by the device
if the driver doesn't support being enabled or disabled?  Obviously this
wouldn't be of any benefit in preventing resume or providing power
saving but it would give userspace the same effect which might be useful
to it for UI purposes.