[OpenWrt-Devel] [PATCH] apm821xx, ath79, lantiq, ramips: move named gpio exports to generic

[Mathias Kresin]

12/02/2019 20:49, Daniel Golle:
> The patch was copied to a bunch of platforms and seems to be a quite
> useful feature for various things. Move it to generic to avoid code
> duplication.

Follow up to the discussion in 
https://github.com/openwrt/openwrt/pull/1814#issuecomment-462942022.

We should rather try to get rid of the patch instead of encourage people 
of using it. Has to be read as soft NAK.

The patch was a hack for missing kernel functionality and was rejected 
upstream a long time ago. The main use case for the patch is pulling 
reset GPIOs or enable a USB VCC supply. More and more drivers/subsystems 
are getting support to control reset GPIOs or enable the VCC supply on 
their own.

The upstream answer to gpio-exports are gpio-hogs. It is just that 
nobody migrated the devicetree source files to GPIO hogs so far. Even if 
gpio-hogs are still a workaround for drivers not able pull their reset 
GPIOs/enable VCC supply, it seem to me the cleaner workaround.

Mathias

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