/**
* alarm_clock_getres - posix getres interface
* @which_clock: clockid
* @tp: timespec to fill
*
* Returns the granularity of underlying alarm base clock
*/
static int alarm_clock_getres(const clockid_t which_clock, struct timespec *tp)
{
clockid_t baseid = alarm_bases[clock2alarm(which_clock)].base_clockid;
if (!alarmtimer_get_rtcdev())
return -ENOTSUPP;
return hrtimer_get_res(baseid, tp);
}
static int snd_pcsp_create(struct snd_card *card)
{
static struct snd_device_ops ops = { };
struct timespec tp;
int err;
int div, min_div, order;
hrtimer_get_res(CLOCK_MONOTONIC, &tp);
if (!nopcm) {
if (tp.tv_sec || tp.tv_nsec > PCSP_MAX_PERIOD_NS) {
printk(KERN_ERR "PCSP: Timer resolution is not sufficient "
"(%linS)\n", tp.tv_nsec);
printk(KERN_ERR "PCSP: Make sure you have HPET and ACPI "
"enabled.\n");
printk(KERN_ERR "PCSP: Turned into nopcm mode.\n");
nopcm = 1;
}
}
if (loops_per_jiffy >= PCSP_MIN_LPJ && tp.tv_nsec <= PCSP_MIN_PERIOD_NS)
min_div = MIN_DIV;
else
min_div = MAX_DIV;
#if PCSP_DEBUG
printk(KERN_DEBUG "PCSP: lpj=%li, min_div=%i, res=%li\n",
loops_per_jiffy, min_div, tp.tv_nsec);
#endif
div = MAX_DIV / min_div;
order = fls(div) - 1;
pcsp_chip.max_treble = min(order, PCSP_MAX_TREBLE);
pcsp_chip.treble = min(pcsp_chip.max_treble, PCSP_DEFAULT_TREBLE);
pcsp_chip.playback_ptr = 0;
pcsp_chip.period_ptr = 0;
atomic_set(&pcsp_chip.timer_active, 0);
pcsp_chip.enable = 1;
pcsp_chip.pcspkr = 1;
spin_lock_init(&pcsp_chip.substream_lock);
pcsp_chip.card = card;
pcsp_chip.port = 0x61;
pcsp_chip.irq = -1;
pcsp_chip.dma = -1;
/* Register device */
err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, &pcsp_chip, &ops);
if (err < 0)
return err;
return 0;
}
