altos/attiny: Eliminate warnings from -Wconversion These have no effect on the generated code as they simply make implicit conversions explicit. Signed-off-by: Keith Packard <keithp@keithp.com>
altos: Add generic LED driver. This driver uses the generic GPIO functions and allows per-LED port and pin configuration. It supports up to 32 LEDs. Rename SoC-specific LED drivers. Remove enabled parameter to ao_led_init Signed-off-by: Keith Packard <keithp@keithp.com>