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Subject[PATCH 5/8] gpio: exar: Fix reading of directions and values
Date
First, the logic for translating a register bit to the return code of
exar_get_direction and exar_get_value were wrong. And second, there was
a flip regarding the register bank in exar_get_direction.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
---
drivers/gpio/gpio-exar.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/gpio/gpio-exar.c b/drivers/gpio/gpio-exar.c
index d6ffb3d89b9c..98bd3eb1290e 100644
--- a/drivers/gpio/gpio-exar.c
+++ b/drivers/gpio/gpio-exar.c
@@ -68,7 +68,7 @@ static int exar_get(struct gpio_chip *chip, unsigned int reg)
value = readb(exar_gpio->regs + reg);
mutex_unlock(&exar_gpio->lock);

- return !!value;
+ return value;
}

static int exar_get_direction(struct gpio_chip *chip, unsigned int offset)
@@ -80,7 +80,7 @@ static int exar_get_direction(struct gpio_chip *chip, unsigned int offset)
addr = bank ? EXAR_OFFSET_MPIOSEL_HI : EXAR_OFFSET_MPIOSEL_LO;
val = exar_get(chip, addr) >> (offset % 8);

- return !!val;
+ return val & 1;
}

static int exar_get_value(struct gpio_chip *chip, unsigned int offset)
@@ -89,10 +89,10 @@ static int exar_get_value(struct gpio_chip *chip, unsigned int offset)
unsigned int addr;
int val;

- addr = bank ? EXAR_OFFSET_MPIOLVL_LO : EXAR_OFFSET_MPIOLVL_HI;
+ addr = bank ? EXAR_OFFSET_MPIOLVL_HI : EXAR_OFFSET_MPIOLVL_LO;
val = exar_get(chip, addr) >> (offset % 8);

- return !!val;
+ return val & 1;
}

static void exar_set_value(struct gpio_chip *chip, unsigned int offset,
--
2.12.0
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