Re: [RFC 4/6] drm/bridge/sii8620: fix extcon dependency

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On 08.04.2020 22:27, Arnd Bergmann wrote:
> Using 'imply' does not work here, it still cause the same build
> failure:
>
> arm-linux-gnueabi-ld: drivers/gpu/drm/bridge/sil-sii8620.o: in function `sii8620_remove':
> sil-sii8620.c:(.text+0x1b8): undefined reference to `extcon_unregister_notifier'
> arm-linux-gnueabi-ld: drivers/gpu/drm/bridge/sil-sii8620.o: in function `sii8620_probe':
> sil-sii8620.c:(.text+0x27e8): undefined reference to `extcon_find_edev_by_node'
> arm-linux-gnueabi-ld: sil-sii8620.c:(.text+0x2870): undefined reference to `extcon_register_notifier'
> arm-linux-gnueabi-ld: drivers/gpu/drm/bridge/sil-sii8620.o: in function `sii8620_extcon_work':
> sil-sii8620.c:(.text+0x2908): undefined reference to `extcon_get_state'
>
> I tried the usual 'depends on EXTCON || !EXTCON' logic, but that caused
> a circular Kconfig dependency. Using IS_REACHABLE() is ugly but works.

'depends on EXTCON || !EXTCON' seems to be proper solution, maybe would be better to try to solve circular dependencies issue.

Regards
Andrzej


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