PIC32_RTCALRM
base + (enabled ? PIC32_SET(PIC32_RTCALRM) :
PIC32_CLR(PIC32_RTCALRM)));
writel(PIC32_RTCALRM_AMASK, base + PIC32_CLR(PIC32_RTCALRM));
writel(freq << 8, base + PIC32_SET(PIC32_RTCALRM));
writel(PIC32_RTCALRM_CHIME, base + PIC32_SET(PIC32_RTCALRM));
alm_en = readb(base + PIC32_RTCALRM);
repeat = readw(base + PIC32_RTCALRM);