Method handle_write

devices/src/legacy/gpio_pl061.rs:180–222

(&mut self, offset: u64, val: u32)

    }

    fn handle_write(&mut self, offset: u64, val: u32) -> Result<()> {
        if offset < OFS_DATA {
            // In order to write to data register, the corresponding bits in the mask, resulting
            // from the offsite[9:2], must be HIGH. otherwise the bit values remain unchanged.
            let mask = (offset >> 2) as u32 & self.dir;
            self.data = (self.data & !mask) | (val & mask);
        } else {
            match offset {
                GPIODIR => {
                    /* Direction Register */
                    self.dir = val & 0xff;
                }
                GPIOIS => {
                    /* Interrupt Sense Register */
                    self.isense = val & 0xff;
                }
                GPIOIBE => {
                    /* Interrupt Both Edges Register */
                    self.ibe = val & 0xff;
                }
                GPIOIEV => {
                    /* Interrupt Event Register */
                    self.iev = val & 0xff;
                }
                GPIOIE => {
                    /* Interrupt Mask Register */
                    self.im = val & 0xff;
                }
                GPIOIC => {
                    /* Interrupt Clear Register */
                    self.istate &= !val;
                }
                GPIOAFSEL => {
                    /* Mode Control Select Register */
                    self.afsel = val & 0xff;
                }
                o => {
                    return Err(Error::BadWriteOffset(o));
                }
            }
        }
        Ok(())
    }

    pub fn trigger_key(&mut self, key: u32) -> Result<()> {
        let mask = (1 << key) as u32;