| Message ID | 1452857725-32414-2-git-send-email-lixiubo@cmss.chinamobile.com (mailing list archive) |
|---|---|
| State | Accepted |
| Commit | 512feb4e19a262ea0dfd7209506a998897feaadc |
| Headers | show |
On Fri, Jan 15, 2016 at 07:35:24PM +0800, Xiubo Li wrote: > 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. A similar change seems to have already been applied.
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);
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> --- sound/soc/fsl/fsl_sai.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)