On Mon, 10 Mar 2014 12:18:20 +0200, Tomi Valkeinen [off-list ref] wrote:

On 08/03/14 13:41, Grant Likely wrote:

quoted

quoted

Ok. If we go for single directional link, the question is then: which
way? And is the direction different for display and camera, which are
kind of reflections of each other?

In general I would recommend choosing whichever device you would
sensibly think of as a master. In the camera case I would choose the
camera controller node instead of the camera itself, and in the display
case I would choose the display controller instead of the panel. The
binding author needs to choose what she things makes the most sense, but
drivers can still use if it it turns out to be 'backwards'

I would perhaps choose the same approach, but at the same time I think
it's all but clear. The display controller doesn't control the panel any
more than a DMA controller controls, say, the display controller.

In a sense it doesn't actually matter. You sensibly want to choose the
most likely direction that drivers would go looking for a device it
depends on, but it can be matched up at runtime regardless of the
direction chosen by the binding.

g.
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