From: Xiubo Li <lixiubo@cmss.chinamobile.com>
Date: Fri, 15 Jan 2016 11:35:25 +0000 (+0800)
Subject: ASoC: fsl-mpc5200: Use usleep_range() instead of msleep()
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=0d55ad456337487e8cdb72acdd520050e575a0bd;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

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

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>
---

diff --git a/sound/soc/fsl/mpc5200_psc_ac97.c b/sound/soc/fsl/mpc5200_psc_ac97.c
index 0bab76051fd8..243700cc29e6 100644
--- a/sound/soc/fsl/mpc5200_psc_ac97.c
+++ b/sound/soc/fsl/mpc5200_psc_ac97.c
@@ -13,6 +13,7 @@
 #include <linux/of_device.h>
 #include <linux/of_platform.h>
 #include <linux/delay.h>
+#include <linux/time.h>
 
 #include <sound/pcm.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);
 
-	msleep(1);
+	usleep_range(1000, 2000);
 	psc_ac97_warm_reset(ac97);
 }