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Message-Id: <1452857725-32414-2-git-send-email-lixiubo@cmss.chinamobile.com>
Date: Fri, 15 Jan 2016 19:35:24 +0800
From: Xiubo Li <lixiubo@...s.chinamobile.com>
To: broonie@...nel.org
Cc: alsa-devel@...a-project.org, linux-kernel@...r.kernel.org,
Xiubo Li <lixiubo@...s.chinamobile.com>
Subject: [PATCH 1/2] ASoC: fsl_sai: 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@...s.chinamobile.com>
---
sound/soc/fsl/fsl_sai.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/sound/soc/fsl/fsl_sai.c b/sound/soc/fsl/fsl_sai.c
index fef264d..0754df7 100644
--- a/sound/soc/fsl/fsl_sai.c
+++ b/sound/soc/fsl/fsl_sai.c
@@ -17,6 +17,7 @@
#include <linux/of_address.h>
#include <linux/regmap.h>
#include <linux/slab.h>
+#include <linux/time.h>
#include <sound/core.h>
#include <sound/dmaengine_pcm.h>
#include <sound/pcm_params.h>
@@ -919,7 +920,7 @@ static int fsl_sai_resume(struct device *dev)
regcache_cache_only(sai->regmap, false);
regmap_write(sai->regmap, FSL_SAI_TCSR, FSL_SAI_CSR_SR);
regmap_write(sai->regmap, FSL_SAI_RCSR, FSL_SAI_CSR_SR);
- msleep(1);
+ usleep_range(1000, 2000);
regmap_write(sai->regmap, FSL_SAI_TCSR, 0);
regmap_write(sai->regmap, FSL_SAI_RCSR, 0);
return regcache_sync(sai->regmap);
--
1.8.3.1
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