On 13 March 2018 at 10:06, Kim Phillips kim.phillips@arm.com wrote:
On Tue, 13 Mar 2018 09:40:14 -0600 Mathieu Poirier mathieu.poirier@linaro.org wrote:
On 12 March 2018 at 13:02, Kim Phillips kim.phillips@arm.com wrote:
On Mon, 12 Mar 2018 11:28:33 -0600 Mathieu Poirier mathieu.poirier@linaro.org wrote:
Is it possible to keep everything equal (no new compatibles or other changes), and have functions like funnel_enable_hw, funnel_disable_hw do something like this instead?:
if (!drvdata->base) return;
Not that I'm aware of - a funnel device won't get probed if it doesn't have a valid 'reg' property to poke at.
All a node needs to contain to get its driver probed is the compatible property. 'reg' is an optional property.
The initialisation code mandate that a valid address be given [1].
[1]. https://elixir.bootlin.com/linux/latest/source/drivers/of/platform.c#L260
The probe function can test for the presence of a reg property, and if not found, assume it's a node representing one of these non-configurable devices.
Kim