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IMX8QXP Configure GPIO

Question asked by shalan yang on May 2, 2018
Latest reply on May 3, 2018 by shalan yang

Hi ,ALL,

            we are useing  imx8qxp , I want to config gpio_1_20 to test startup time in uboot, but I do not use  "imx8_iomux_setup_multiple_pads,gpio_request(GPS_TRX_TEST, "GPS_TRX_TEST"), gpio_direction_output(GPS_TRX_TEST, 1); " system call function, because I want to use it in first uboot, so I must configure it by register or Assembly language (for example: use it start.s), how can I configure the gpio1_20?

could you give me a example ? tks!