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Date: Tue, 29 Nov 2016 00:13:02 +0530
From: Aniroop Mathur <a.mathur@...sung.com>
To: mcuos.com@...il.com, dmitry.torokhov@...il.com,
linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: s.samuel@...sung.com, r.mahale@...sung.com,
aniroop.mathur@...il.com, Aniroop Mathur <a.mathur@...sung.com>
Subject: [PATCH] Input: touchscreen: w90p910 - change msleep to usleep_range for small msecs
msleep(1~20) may not do what the caller intends, and will often sleep longer.
(~20 ms actual sleep for any value given in the 1~20ms range)
This is not the desired behaviour for many cases like device resume time,
device suspend time, device enable time, retry logic, etc.
Thus, change msleep to usleep_range for precise wakeups.
Signed-off-by: Aniroop Mathur <a.mathur@...sung.com>
---
drivers/input/touchscreen/w90p910_ts.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/input/touchscreen/w90p910_ts.c b/drivers/input/touchscreen/w90p910_ts.c
index da6004e..3f14b5a 100644
--- a/drivers/input/touchscreen/w90p910_ts.c
+++ b/drivers/input/touchscreen/w90p910_ts.c
@@ -171,9 +171,9 @@ static int w90p910_open(struct input_dev *dev)
clk_enable(w90p910_ts->clk);
__raw_writel(ADC_RST1, w90p910_ts->ts_reg);
- msleep(1);
+ usleep_range(1000, 1100);
__raw_writel(ADC_RST0, w90p910_ts->ts_reg);
- msleep(1);
+ usleep_range(1000, 1100);
/* set delay and screen type */
val = __raw_readl(w90p910_ts->ts_reg + 0x04);
--
2.6.2
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