On Sat, 2017-07-08 at 15:40 +0200, Hans de Goede wrote: > Testing has shown that the TS-pin's bias-current needs to be disabled > when reading the GPIO0 pin in GPADC mode. > > It seems that there is only 1 bias current source and to be able to > use it > for the GPIO0 pin in GPADC mode it must be temporarily turned off for > the > TS pin, but the datasheet does not mention this. > > This commit adds the necessary writes to turn the TS pin BIAS current > off before and back on after reading the GPADC. This fixes the GPADC > always returning a reading of 0. > > > + /* After switching to the GPADC pin give things some time to > settle */ > + usleep_range(6000, 10000); msleep(6); ? -- Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> Intel Finland Oy -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
