On Thu, Nov 1, 2018 at 12:49 PM A.s. Dong <aisheng.dong@xxxxxxx> wrote: > This seems a bit confusing to me. > That GPIO is used to control the SD card power on/off. So it's naturally a > GPIO regulator. Looking at exist IMX dts, you will find all similar board doing > like this. Pwrseq seems more like to be used for WiFi/eMMC card. > Am I missed something? As per the board schematics the name of the signal is SD0_nRST, where RST means "reset". There is even this note in the schematics: "ROM Code will reset the SD power during boot up through SD_RST". eMMC reset is better handled by 'reset-gpios' property from pwrseq.