Hello Tim, Thanks for your feedback. On 08/14/2014 04:13 PM, Tim Kryger wrote: > > https://lkml.org/lkml/2014/8/12/377 > > Perhaps I misunderstood the discussion in that thread but couldn't > this failure also be addressed by adding proper constraints for each > FET in individual DTS files to reflect the range of voltages that are > safe for all consumers of that supply on the board? > > I thought the main concern with your other change was that the > constraints you listed in the DTSI represented the limits of the PMIC > and not the consumers. > > -Tim > Yes, if the child regulator has the constraints defined then regulator_voltage_list() won't filter the obtained parent voltage so it won't be necessary to call regulator_get_voltage() directly. But as Mark said on the thread you referred [0], if the voltage is not allowed to change for a regulator then it makes no sense to have their constraints specify a voltage range. And in this particular case the parent supply of the FET used as vmmc-supply is a fixed regulator. Now I wonder why mmc_regulator_get_ocrmask() even sets as a valid voltage in the OCR mask the voltage for a fixed regulator if mmc_regulator_set_ocr() is a no-op in this case but I guess is because users of this function shouldn't really care about this peculiarity. In any case, this change is consistent since with this patch FETs behaves the same as other fixed regulators whose voltage can't be changed but the voltage is still reported in the OCR mask. Best regards, Javier [0]: https://lkml.org/lkml/2014/8/13/364 -- 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
