REG_PORTA
rpi_touchscreen_i2c_write(ts, REG_PORTA, BIT(2));
attiny_set_port_state(state, REG_PORTA, PA_LCD_LR);
attiny_set_port_state(state, REG_PORTA, 0);
state->port_states[reg - REG_PORTA] = val;
return state->port_states[reg - REG_PORTA];