| ret = gpio_request_array(mx6q_sabresd_flexcan_gpios, ARRAY_SIZE(mx6q_sabresd_flexcan_gpios)); static struct gpio mx6q_sabresd_flexcan_gpios[] = { { SABRESD_CAN1_STBY, GPIOF_OUT_INIT_LOW, "flexcan1-stby" }, }; #define SABRESD_CAN1_STBY IMX_GPIO_NR(4, 5) /* There's a off-by-one betweem the gpio bank number and the gpiochip */ /* range e.g. GPIO_1_5 is gpio 5 under linux */ #define IMX_GPIO_NR(bank, nr) (((bank) - 1) * 32 + (nr)) 以下的bank ,nr是什么意思？ #define IMX_GPIO_NR(bank, nr) (((bank) - 1) * 32 + (nr)) |