On 07/05/14 18:03, Tony Lindgren wrote: >>> + lcd0: display { >>> + compatible = "sharp,ls037v7dw01"; >>> + power-supply = <&lcd_3v3>; >>> + reset-gpios = <&gpio5 27 GPIO_ACTIVE_HIGH>; /* gpio155, lcd RESB */ >>> + enable-gpios = <&gpio5 26 GPIO_ACTIVE_HIGH /* gpio154, lcd MO */ >>> + &gpio1 2 GPIO_ACTIVE_HIGH /* gpio2, lcd LR */ >>> + &gpio1 3 GPIO_ACTIVE_HIGH /* gpio3, lcd UD */ >>> + &gpio5 24 GPIO_ACTIVE_HIGH>; /* gpio152, lcd INI */ >> >> Why are most of the gpios in 'enable-gpios'? MO, LR and UD don't really >> have anything to do with enabling the panel. Why not just have one >> 'gpios' array with all the gpios, as they are quite a mixed bunch? > > Yeah that's what I had initially, but reading simple-panel.txt noticed > there are some standardized GPIOs for reset and enable. I'm not sure if it's worth to try to make it compatible with simple-panel. simple-panel bindings do not work with omapdss anyway, and simple-panel doesn't have the support for input ports/endpoints. Can the panel be used with only one gpio (I guess that would be INI or RESB)? If not, simple-panel doesn't work. > How about we set up one reset-gpios, one enable-gpios and an array of > three unlabelled GPIOs? > > Or if we want to add something generic, we could add new mode-gpios > property that other panels might be able to use too? > > BTW, I'm also personally fine with all five gpios showing in a single > gpios property, I'm not too exited about naming anything in DT.. I don't have a strong opinion here. I don't have much experience with DT, especially with making bindings compatible with other ones. I'd just forget the simple-panel, and have single gpio array. Tomi
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