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ASoC: fsl-mpc5200: Use usleep_range() instead of msleep()

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Since msleep() will sleep longer than intended time for values less
than 20ms, this patch allows the use of usleep_range for just 1ms.
usleep_range is a finer precision implementation of msleep and is
designed to be a drop-in replacement for udelay where a precise
sleep/busy-wait is unnecessary.

More details see Documentation/timers/timers-howto.txt.

Signed-off-by: Xiubo Li <lixiubo@cmss.chinamobile.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Xiubo Li
2016-01-15 19:35:25 +08:00
committed by Mark Brown
parent 822ad70a2f
commit 0d55ad4563
1 changed files with 2 additions and 1 deletions
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3
sound/soc/fsl/mpc5200_psc_ac97.c
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@@ -13,6 +13,7 @@
#include <linux/of_device.h> #include <linux/of_device.h>
#include <linux/of_platform.h> #include <linux/of_platform.h>
#include <linux/delay.h> #include <linux/delay.h>
#include <linux/time.h>
#include <sound/pcm.h> #include <sound/pcm.h>
#include <sound/pcm_params.h> #include <sound/pcm_params.h>
@@ -127,7 +128,7 @@ static void psc_ac97_cold_reset(struct snd_ac97 *ac97)
mutex_unlock(&psc_dma->mutex); mutex_unlock(&psc_dma->mutex);
msleep(1); usleep_range(1000, 2000);
psc_ac97_warm_reset(ac97); psc_ac97_warm_reset(ac97);
} }