On 26/04/21 10:48, Andy Shevchenko wrote: > On Mon, Apr 26, 2021 at 11:44 AM Rodolfo Giometti <giometti@xxxxxxxxxxxx> wrote: >> >> On 20/07/20 10:17, Linus Walleij wrote: >>> IIUC Rodolfo's idea is to provide this with a DT compatible. >>> The use case will be industrial automation-ish tasks from userspace. >>> >>> Currently the only mechanism we have in the device tree to >>> assign a use for a line is the "gpio-line-names" property, >>> which creates a name that is reported upward to the character >>> device. >>> >>> Rodolfo's patch is for scripting use cases, assigning some lines >>> for some cases to be handled by scripts, not the character device. >>> >>> What I am a bit worried about is if this would be a Linuxism, as DT >>> should be OS neutral. > > Not only neutral but be software'isms free! > It's only about hardware. > > What I understand here is that we have missed the intermediate layer > (let's call it 'platform abstraction') where it's related to the > platform and neither strictly speaking hardware, nor software per se. Maybe I don't well understand the-problem(TM), but why people are currently using led and uinput layers to describes their output or input lines? Why don't providing a dedicated layer for this special scope? My two cents, Rodolfo -- GNU/Linux Solutions e-mail: giometti@xxxxxxxxxxxx Linux Device Driver giometti@xxxxxxxx Embedded Systems phone: +39 349 2432127 UNIX programming skype: rodolfo.giometti
