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ALSA: timer - Add comments and use ns_to_ktime()
Add the license and misc comments at the beginning of the code. Also, use ns_to_ktime() for simplification. Signed-off-by: Takashi Iwai <tiwai@suse.de>
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1 changed files with 19 additions and 2 deletions
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@ -1,4 +1,21 @@
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/*
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/*
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* ALSA timer back-end using hrtimer
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* Copyright (C) 2008 Takashi Iwai
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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*/
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#include <linux/init.h>
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#include <linux/init.h>
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@ -26,7 +43,7 @@ static enum hrtimer_restart snd_hrtimer_callback(struct hrtimer *hrt)
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{
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{
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struct snd_hrtimer *stime = container_of(hrt, struct snd_hrtimer, hrt);
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struct snd_hrtimer *stime = container_of(hrt, struct snd_hrtimer, hrt);
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struct snd_timer *t = stime->timer;
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struct snd_timer *t = stime->timer;
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hrtimer_forward_now(hrt, ktime_set(0, t->sticks * resolution));
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hrtimer_forward_now(hrt, ns_to_ktime(t->sticks * resolution));
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snd_timer_interrupt(stime->timer, t->sticks);
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snd_timer_interrupt(stime->timer, t->sticks);
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return HRTIMER_RESTART;
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return HRTIMER_RESTART;
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}
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}
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@ -62,7 +79,7 @@ static int snd_hrtimer_start(struct snd_timer *t)
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{
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{
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struct snd_hrtimer *stime = t->private_data;
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struct snd_hrtimer *stime = t->private_data;
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hrtimer_start(&stime->hrt, ktime_set(0, t->sticks * resolution),
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hrtimer_start(&stime->hrt, ns_to_ktime(t->sticks * resolution),
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HRTIMER_MODE_REL);
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HRTIMER_MODE_REL);
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return 0;
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return 0;
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}
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}
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