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Commit a08e1a37 authored by Jingoo Han's avatar Jingoo Han Committed by Linus Torvalds
Browse files

drivers/video/backlight/ltv350qv.c: use usleep_range() instead of msleep() for small sleeps 



Since msleep() might not sleep for the desired amount when less than 20ms,
use usleep_range().

Signed-off-by: default avatarJingoo Han <jg1.han@samsung.com>
Cc: Haavard Skinnemoen <hskinnemoen@gmail.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: Sachin Kamat <sachin.kamat@linaro.org>
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 5333e254

drivers/video/backlight/ltv350qv.c

+3 −3
Original line number Diff line number Diff line
@@ -75,7 +75,7 @@ static int ltv350qv_power_on(struct ltv350qv *lcd) 
	/* Power On Reset Display off State */

	if (ltv350qv_write_reg(lcd, LTV_PWRCTL1, 0x0000))

		goto err;

	msleep(15);

	usleep_range(15000, 16000);



	/* Power Setting Function 1 */

	if (ltv350qv_write_reg(lcd, LTV_PWRCTL1, LTV_VCOM_DISABLE))
@@ -153,7 +153,7 @@ static int ltv350qv_power_on(struct ltv350qv *lcd) 
err_power2:

err_power1:

	ltv350qv_write_reg(lcd, LTV_PWRCTL2, 0x0000);

	msleep(1);

	usleep_range(1000, 1100);

err:

	ltv350qv_write_reg(lcd, LTV_PWRCTL1, LTV_VCOM_DISABLE);

	return -EIO;
@@ -175,7 +175,7 @@ static int ltv350qv_power_off(struct ltv350qv *lcd) 
	ret |= ltv350qv_write_reg(lcd, LTV_PWRCTL2, 0x0000);



	/* Wait at least 1 ms */

	msleep(1);

	usleep_range(1000, 1100);



	/* Power down setting 2 */

	ret |= ltv350qv_write_reg(lcd, LTV_PWRCTL1, LTV_VCOM_DISABLE);