pub const BACKUP_REGISTER_COUNT: usize = 20;

/// Unlock the backup domain
pub(super) unsafe fn unlock_backup_domain(_clock_config: u8) {
    // FIXME:
    // crate::pac::PWR.cr1().modify(|w| w.set_dbp(true));
    // while !crate::pac::PWR.cr1().read().dbp() {}

    // let reg = crate::pac::RCC.bdcr().read();
    // assert!(!reg.lsecsson(), "RTC is not compatible with LSE CSS, yet.");

    // if !reg.rtcen() || reg.rtcsel().0 != clock_config {
    //     crate::pac::RCC.bdcr().modify(|w| w.set_bdrst(true));

    //     crate::pac::RCC.bdcr().modify(|w| {
    //         // Reset
    //         w.set_bdrst(false);

    //         // Select RTC source
    //         w.set_rtcsel(Rtcsel(clock_config));
    //         w.set_rtcen(true);

    //         // Restore bcdr
    //         w.set_lscosel(reg.lscosel());
    //         w.set_lscoen(reg.lscoen());

    //         w.set_lseon(reg.lseon());
    //         w.set_lsedrv(reg.lsedrv());
    //         w.set_lsebyp(reg.lsebyp());
    //     });
    // }
}

pub(crate) unsafe fn enable_peripheral_clk() {
    // // enable peripheral clock for communication
    // crate::pac::rcc.apb1enr1().modify(|w| w.set_rtcapben(true));

    // // read to allow the pwr clock to enable
    // crate::pac::PWR.cr1().read();
}