From: Russell King <rmk+kernel@armlinux.org.uk>
Date: Tue, 26 Sep 2017 16:57:12 +0000 (-0700)
Subject: Input: sa1111ps2 - extend test delay
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=361fa055f1ef475ca9f9bdf88884fd128273366e;p=linux.git

Input: sa1111ps2 - extend test delay

A 2us delay is too small for the bus to settle after writing to the
register.  Extend to 10us which gives more reliable results.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---

diff --git a/drivers/input/serio/sa1111ps2.c b/drivers/input/serio/sa1111ps2.c
index f1c036260d253..f9e5c793f4f09 100644
--- a/drivers/input/serio/sa1111ps2.c
+++ b/drivers/input/serio/sa1111ps2.c
@@ -212,7 +212,7 @@ static unsigned int ps2_test_one(struct ps2if *ps2if,
 
 	writel_relaxed(PS2CR_ENA | mask, ps2if->base + PS2CR);
 
-	udelay(2);
+	udelay(10);
 
 	val = readl_relaxed(ps2if->base + PS2STAT);
 	return val & (PS2STAT_KBC | PS2STAT_KBD);