linux-kernel - [PATCH] gpio: pxa: normalize the return value for gpio

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Date:	Fri, 10 Jan 2014 14:03:03 +0800
From:	Neil Zhang <zhangwm@...vell.com>
To:	<linus.walleij@...aro.org>, <gnurou@...il.com>,
	<linux-gpio@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC:	Neil Zhang <zhangwm@...vell.com>
Subject: [PATCH] gpio: pxa: normalize the return value for gpio_get

It would be convenient to normalize the return value for gpio_get.

I have checked mach-mmp / mach-pxa / plat-pxa / plat-orion / mach-orion5x.
It's OK for all of them to change this function to return 0 and 1.

Signed-off-by: Neil Zhang <zhangwm@...vell.com>
---
 drivers/gpio/gpio-pxa.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpio/gpio-pxa.c b/drivers/gpio/gpio-pxa.c
index cc13d1b..42e6e64 100644
--- a/drivers/gpio/gpio-pxa.c
+++ b/drivers/gpio/gpio-pxa.c
@@ -263,7 +263,8 @@ static int pxa_gpio_direction_output(struct gpio_chip *chip,
 
 static int pxa_gpio_get(struct gpio_chip *chip, unsigned offset)
 {
-	return readl_relaxed(gpio_chip_base(chip) + GPLR_OFFSET) & (1 << offset);
+	u32 gplr = readl_relaxed(gpio_chip_base(chip) + GPLR_OFFSET);
+	return !!(gplr & (1 << offset));
 }
 
 static void pxa_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
-- 
1.7.9.5

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