Hi
On 04/27/2015 08:54 AM, Octavian Purdila wrote:
On Mon, Apr 27, 2015 at 6:42 PM, Kuppuswamy Sathyanarayanan
<sathyanarayanan.kuppuswamy@xxxxxxxxxxxxxxx> wrote:
Since Acpi framework already exports this info to user space, Why not do
this derivation in user space code ? Why do we need new ABI, if the same
can be derived from existing one.
The ABI was added in the previous patch so that we can present the
sensor orientation information to userspace even in the case of device
tree.
If the main reason for implementing a new ABI is to support DT
platforms, Why not implement a version of _PLD for device tree ? Don't
you think it would be much better than adding a new ABI to export
redundant information ?
Also the location information of the device is not just specific to iio
drivers. You should consider that we would have similar requirements for
devices implemented as input or platform drivers.
The purpose of this patch is to provide a consistent ABI to userspace,
i.e. to avoid doing one thing in the ACPI case and another thing in
the case of device tree.
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Sathyanarayanan Kuppuswamy
Android kernel developer
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