GPIO_DRV_STRENGTH_BITS   64 drivers/pinctrl/bcm/pinctrl-iproc-gpio.c #define GPIO_DRV_STRENGTH_BITS       3
GPIO_DRV_STRENGTH_BITS   56 drivers/pinctrl/bcm/pinctrl-nsp-gpio.c #define GPIO_DRV_STRENGTH_BITS		0x03