File list (Check if you may need any files):
app_note\app_gpio
........\........\gpio_test_app.c
........\........\Makefile
........\gpio_dir_driver
........\...............\gpio_custom_dir_driver.c
........\...............\Makefile
........\gpio_driver
........\...........\gpio_custom_driver.c
........\...........\Makefile
........\pinmux_driver
........\.............\Makefile
........\.............\pinmux_custom_driver.c
........\register_access_driver
........\......................\Makefile
........\......................\register_access_driver.c
app_note
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