Hi Prabhakar, > So instead of a GPIO pin acting as regulator this SDmIOVS can be used > to toggle 0/1 which will control the pmic to allow us for switching > between 1.8V and 3.3V. Does the PMIC have a Linux driver? If so, then SDmIOVS would be really a GPIO telling the PMIC what to do? If not... > There is a similar instance of regulator driver [1] which is > controlled via register bit write, but in our case the SD_STATUS > register is part of the SDHI IP block itself. ... I could imagine that the SDHI driver itself exposes a regulator driver. Just without a <reg>-property. The compatible will induce which register and bit to use. Happy hacking, Wolfram
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