We are using imx6ul G3 in our of our custom design. We want to configure TAMPER_PIN 9 as GPIO but we are unable to do so.
We tried to set the SW_MUX_CTL_PAD_SNVS_TAMPER9 SW MUX Control Register (0x020E0040) to value 0x5 but when we read back its showing as 0. We tried the same with all the other TAMPER pins(0-9) as well. Also, when we read the fuse register(0x430, TAMPER_PIN_DISABLE[1:0]), its giving value as 0xf0216801 ( Which means TAMPER_PIN_DISABLE[1:0] is set to 0x2(10)).
Please let us know how to configure Tamper Pin as GPIO’s .