[PATCH] gpio: generic: clamp values from bgpio_get_set()

[Linus Walleij]

The bgpio_get_set() call should return a value clamped to [0,1],
the current code will return a negative value if reading
bit 31, which gets interpreted as an error by the gpiolib core.

Reported-by: Clemens Gruber <clemens.gruber@xxxxxxxxxxxx>
Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
---
 drivers/gpio/gpio-generic.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpio/gpio-generic.c b/drivers/gpio/gpio-generic.c
index 72088028d7a9..ea581dc23d44 100644
--- a/drivers/gpio/gpio-generic.c
+++ b/drivers/gpio/gpio-generic.c
@@ -141,9 +141,9 @@ static int bgpio_get_set(struct gpio_chip *gc,
unsigned int gpio)
     unsigned long pinmask = bgc->pin2mask(bgc, gpio);

     if (bgc->dir & pinmask)
-        return bgc->read_reg(bgc->reg_set) & pinmask;
+        return !!(bgc->read_reg(bgc->reg_set) & pinmask);
     else
-        return bgc->read_reg(bgc->reg_dat) & pinmask;
+        return !!(bgc->read_reg(bgc->reg_dat) & pinmask);
 }

 static int bgpio_get(struct gpio_chip *gc, unsigned int gpio)
-- 
2.4.3

Yours,
Linus Walleij
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