On 27/06/2017 at 19:36:31 +0200, Maxime Ripard wrote: > Hi, > > On Tue, Jun 27, 2017 at 11:29:10PM +0800, icenowy@xxxxxxx wrote: > > Maxime, here's another problem: if we have already a GP LRADC driver, > > how can we tell the kernel to use it as IIO ADC rather than keys? > > The GPADC IIO driver is not for the LRADC driver, but the GPADC / > temperature sensor. > > We used to have an LRADC IIO driver in the CHIP BSP written by Alex > (in CC): > https://github.com/NextThingCo/CHIP-linux/commit/8675b761c54be73dc7cc0113209f02e10cc63a27 > > But he never mainlined it. > > > Should we introduce a new property for this once ready? > > We need to keep the current binding. We can just check for the > presence or not of child nodes to see if it has some keys, and we'd > need an IIO-to-input driver that is yet to be written. > The whole submission is here and can already replace the existing driver but it will be polling instead of using interrupts: http://lists.infradead.org/pipermail/linux-arm-kernel/2016-July/440734.html It is not upstream because it seems the full replacement was required at once instead of doing it incrementally and there was (is) no API for in-kernel events consumers. Also, the DT ABI stuff would have to be solved. -- Alexandre Belloni, Free Electrons Embedded Linux and Kernel engineering http://free-electrons.com -- 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
