1 2GPIO hog (CONFIG_GPIO_HOG) 3-------- 4 5All the GPIO hog are initialized in gpio_hog_probe_all() function called in 6board_r.c just before board_late_init() but you can also acces directly to 7the gpio with gpio_hog_lookup_name(). 8 9 10Example, for the device tree: 11 12 tca6416@20 { 13 compatible = "ti,tca6416"; 14 reg = <0x20>; 15 #gpio-cells = <2>; 16 gpio-controller; 17 18 env_reset { 19 gpio-hog; 20 input; 21 gpios = <6 GPIO_ACTIVE_LOW>; 22 }; 23 boot_rescue { 24 gpio-hog; 25 input; 26 line-name = "foo-bar-gpio"; 27 gpios = <7 GPIO_ACTIVE_LOW>; 28 }; 29 }; 30 31You can than access the gpio in your board code with: 32 33 struct gpio_desc *desc; 34 int ret; 35 36 ret = gpio_hog_lookup_name("boot_rescue", &desc); 37 if (ret) 38 return; 39 if (dm_gpio_get_value(desc) == 1) 40 printf("\nBooting into Rescue System\n"); 41 else if (dm_gpio_get_value(desc) == 0) 42 printf("\nBoot normal\n"); 43