BCM2835_FSEL_ALT4 15 include/dt-bindings/pinctrl/bcm2835.h #define BCM2835_FSEL_ALT4 3 BCM2835_FSEL_ALT4 15 scripts/dtc/include-prefixes/dt-bindings/pinctrl/bcm2835.h #define BCM2835_FSEL_ALT4 3