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authorLiu Ying <Ying.Liu@freescale.com>2014-05-28 18:50:11 +0800
committerThierry Reding <thierry.reding@gmail.com>2014-08-25 15:46:28 +0200
commitbd59bdc898623e6c948a9f900250ce7343cf9012 (patch)
treebbdb9e00203a1b4e246b42d75ff7c188d38ceb99 /drivers/pwm/pwm-imx.c
parent533acc0e8df7d6553f11cf91c177211cb6037968 (diff)
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>
Diffstat (limited to 'drivers/pwm/pwm-imx.c')
-rw-r--r--drivers/pwm/pwm-imx.c2
1 files changed, 1 insertions, 1 deletions
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)

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