[PATCH 11/14] ARM: OMAP2+: Add device-tree support for NOR flash

On 03/04/2013 11:51 AM, Jon Hunter wrote:

On 03/04/2013 05:57 AM, Ezequiel Garcia wrote:

quoted

Hi Jon,

On Tue, Feb 26, 2013 at 2:30 PM, Jon Hunter [off-list ref] wrote:

quoted

+
+Example:
+
+gpmc: gpmc at 6e000000 {
+       compatible = "ti,omap3430-gpmc", "simple-bus";

I'm concern about using simple-bus, and I'm not entirely sure this will work.

AFAIK, you can't correlate a parent-child relationship in the device tree
to the order in which drivers will be probed,
so it's only a matter of coincidence if this is working for you right now.

Ummm, I am not sure I am convinced. Have you looked at
of_platform_bus_create() which creates the devices? It is clearly
creating the child devices after creating the parent device.

Sorry you said order by which drivers are probed. Yes I would agree that
you cannot control the order drivers are probed, but just the order
devices are registered.

However, I don't see this as being a device-tree specific issue. Even
when not using device-tree you would need to ensure that probing the
parent happens before the child for the GPMC.

Jon