From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754496AbcK1Sfc (ORCPT ); Mon, 28 Nov 2016 13:35:32 -0500 Received: from mail-pg0-f67.google.com ([74.125.83.67]:34963 "EHLO mail-pg0-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752099AbcK1SfW (ORCPT ); Mon, 28 Nov 2016 13:35:22 -0500 From: Aniroop Mathur To: broonie@opensource.wolfsonmicro.com, pyro@f2s.com, zap@homelink.ru, dmitry.torokhov@gmail.com, linux-input@vger.kernel.org, linux-kernel@vger.kernel.org Cc: s.samuel@samsung.com, r.mahale@samsung.com, aniroop.mathur@gmail.com, Aniroop Mathur Subject: [PATCH] Input: touchscreen: zylonite_wm97xx - change msleep to usleep_range for small msecs Date: Tue, 29 Nov 2016 00:14:55 +0530 Message-Id: <1480358695-3024-1-git-send-email-a.mathur@samsung.com> X-Mailer: git-send-email 2.6.2 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 --- drivers/input/touchscreen/zylonite-wm97xx.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/input/touchscreen/zylonite-wm97xx.c b/drivers/input/touchscreen/zylonite-wm97xx.c index e2ccd68..cebd3a8 100644 --- a/drivers/input/touchscreen/zylonite-wm97xx.c +++ b/drivers/input/touchscreen/zylonite-wm97xx.c @@ -81,7 +81,7 @@ static void wm97xx_acc_pen_up(struct wm97xx *wm) { int i; - msleep(1); + usleep_range(1000, 1100); for (i = 0; i < 16; i++) MODR; @@ -98,7 +98,7 @@ static int wm97xx_acc_pen_down(struct wm97xx *wm) * for samples. The controller can't have a suitably low * threshold set to use the notifications it gives. */ - msleep(1); + usleep_range(1000, 1100); if (tries > 5) { tries = 0; -- 2.6.2