On 28 February 2018 at 22:44, Arnd Bergmann <arnd@xxxxxxxx> wrote: > On Wed, Feb 28, 2018 at 1:44 PM, Baolin Wang <baolin.wang@xxxxxxxxxx> wrote: >> On some platforms (such as Spreadtrum platform), the GPIO keys can only >> be triggered by level type. So this patch introduces one property to >> indicate if the GPIO trigger type is level trigger or edge trigger. >> >> Signed-off-by: Baolin Wang <baolin.wang@xxxxxxxxxx> >> --- >> Changes since v2: >> - Use 'interrupt' property to indicate the irq type. >> >> Changes since v1: >> - Diable the GPIO irq until reversing the GPIO level type. > > I've looked at your patch in more detail now, and given it a bit more thought. > > I wonder if you could move that logic into your gpiochip/irqchip driver instead. > It seems that what you do in the gpio-keys driver is to emulate edge triggered > behavior on a level triggered irqchip. > > If you put the same logic into the gpio driver, you could simply make it > pretend to support an edge trigger on both edges and call into the interrupt > handler whenever the state changes. > That is really a good suggestion, which can avoid duplicate level reverse logic in different drivers. So this patch can be simplified just adding one trigger_type to indicate the interrupt type (not always edge trigger). Thanks for your suggestion. -- Baolin.wang Best Regards -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
