From: Liu Ying <Ying.Liu@freescale.com>
Date: Wed, 28 May 2014 10:50:11 +0000 (+0800)
Subject: pwm: imx: Fix the macro MX3_PWMCR_PRESCALER(x) definition
X-Git-Tag: v3.18-rc2~21^2~6
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=bd59bdc898623e6c948a9f900250ce7343cf9012;p=karo-tx-linux.git

pwm: imx: Fix the macro MX3_PWMCR_PRESCALER(x) definition

This patch adds missing parentheses around the argument of the macro
MX3_PWMCR_PRESCALER(x) to avoid any potential macro expansion issue.

Reported-by: Lothar Waßmann <LW@KARO-electronics.de>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Shawn Guo <shawn.guo@freescale.com>
Cc: Lothar Waßmann <LW@KARO-electronics.de>
Cc: linux-pwm@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Signed-off-by: Liu Ying <Ying.Liu@freescale.com>
Acked-by: Shawn Guo <shawn.guo@freescale.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
---

diff --git a/drivers/pwm/pwm-imx.c b/drivers/pwm/pwm-imx.c
index 5449d9150d40..183225e41d60 100644
--- a/drivers/pwm/pwm-imx.c
+++ b/drivers/pwm/pwm-imx.c
@@ -32,7 +32,7 @@
 #define MX3_PWMCR                 0x00    /* PWM Control Register */
 #define MX3_PWMSAR                0x0C    /* PWM Sample Register */
 #define MX3_PWMPR                 0x10    /* PWM Period Register */
-#define MX3_PWMCR_PRESCALER(x)    (((x - 1) & 0xFFF) << 4)
+#define MX3_PWMCR_PRESCALER(x)    ((((x) - 1) & 0xFFF) << 4)
 #define MX3_PWMCR_DOZEEN                (1 << 24)
 #define MX3_PWMCR_WAITEN                (1 << 23)
 #define MX3_PWMCR_DBGEN			(1 << 22)