2013/10/4 Olof Johansson <olof@xxxxxxxxx>: > On Thu, Oct 3, 2013 at 10:39 AM, Inki Dae <inki.dae@xxxxxxxxxxx> wrote: >> 2013/10/3 Sean Paul <seanpaul@xxxxxxxxxxxx>: >>> On Thu, Oct 3, 2013 at 9:55 AM, Inki Dae <inki.dae@xxxxxxxxxxx> wrote: >>>> Can a regulator be used instead of gpio in other board case? >>>> >>> >>> No, not to my knowledge. >>> >> >> Hm.. plz check it out again. the gpio pin is specific to board, and >> the the gpio be used as power source trigger could be replaced with a >> regulator according to board design. So you should consider all >> possibilities even though there are no other cases yet: other board >> could use a regulator instead. > > Take a look at the data sheet, it is publicly available. > > PD_N is not a power supply input, so modelling it as a regulator makes no sense: > > "If PD_N is LOW, then the device is in Deep power-down completely, > even if supply rail is ON; for the device to be able to operate, the > PD_N pin must be HIGH." > I still think the pin could be replaced with a regulator. But lvds-bridge node has "powerdown-gpio" property - it say this board will use gpio pin - specific to board. So it seems no problem. > > > -Olof > -- > To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
