[PATCH 1/2] Use usleep_range() for better precision timings

[Oleh Kravchenko <oleg@xxxxxxxxxx>]

Signed-off-by: Oleh Kravchenko <oleg@xxxxxxxxxx>
---
 drivers/leds/leds-cr0014114.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/leds/leds-cr0014114.c b/drivers/leds/leds-cr0014114.c
index 0e4262462cb9..91deb40db307 100644
--- a/drivers/leds/leds-cr0014114.c
+++ b/drivers/leds/leds-cr0014114.c
@@ -37,7 +37,7 @@
 
 /* CR0014114 default settings */
 #define CR_MAX_BRIGHTNESS	GENMASK(6, 0)
-#define CR_FW_DELAY_MSEC	10
+#define CR_FW_DELAY_USEC	10000
 #define CR_RECOUNT_DELAY	(HZ * 3600)
 
 struct cr0014114_led {
@@ -92,7 +92,7 @@ static int cr0014114_recount(struct cr0014114 *priv)
 
 	cmd = CR_NEXT_REENUMERATE;
 	for (i = 0; i < priv->count; i++) {
-		msleep(CR_FW_DELAY_MSEC);
+		usleep_range(CR_FW_DELAY_USEC, CR_FW_DELAY_USEC + 1);
 
 		ret = spi_write(priv->spi, &cmd, sizeof(cmd));
 		if (ret)
@@ -126,7 +126,7 @@ static int cr0014114_sync(struct cr0014114 *priv)
 			goto err;
 
 		priv->do_recount = false;
-		msleep(CR_FW_DELAY_MSEC);
+		usleep_range(CR_FW_DELAY_USEC, CR_FW_DELAY_USEC + 1);
 	}
 
 	priv->buf[0] = CR_SET_BRIGHTNESS;
@@ -136,7 +136,7 @@ static int cr0014114_sync(struct cr0014114 *priv)
 	ret = spi_write(priv->spi, priv->buf, priv->count + 2);
 
 err:
-	priv->delay = jiffies + msecs_to_jiffies(CR_FW_DELAY_MSEC);
+	priv->delay = jiffies + usecs_to_jiffies(CR_FW_DELAY_USEC);
 
 	return ret;
 }
@@ -252,7 +252,7 @@ static int cr0014114_probe(struct spi_device *spi)
 	priv->dev	= &spi->dev;
 	priv->spi	= spi;
 	priv->delay	= jiffies -
-			  msecs_to_jiffies(CR_FW_DELAY_MSEC);
+			  usecs_to_jiffies(CR_FW_DELAY_USEC);
 
 	priv->do_recount = true;
 	ret = cr0014114_sync(priv);
-- 
2.21.0