Am Freitag, 8. Januar 2016, 09:22:31 schrieb Javier Martinez Canillas: > > For example: > > we need enable wifi module power to via the WL_REG_ON > > pin, we need enable it as the regulator if this pin is connected to > > the gpio of cpu. > > This part confuses me, so does your chip have an actual regulator that > needs to be enabled or is just a fake regulator whose gpio property is > used not to enable the regulator but to toggle the WL_REG_ON pin of > the WiFi chip? another option would be to use the reset-gpio-handles. rk3288-veyron and I think some Exynos as well use it that way. > > Maybe, someone will say that can pull up/down from dts. > > Unfortunately some SoCs can't support pinctrl pull up/down in > > internal. > > Can you please elaborate on this? AFAIU this limitation is the reason > why you went with the regulator approach so I think it deserve a more > deep explanation. On the rk3036 each pin has an individual unchangable pull direction. So it's either no bias or pulling in the predefined direction (the pin_default bias option). Heiko -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
