[PATCH 5/8] gpio: exar: Fix reading of directions and values
From: Jan Kiszka <jan.kiszka@siemens.com>
Date: 2017-05-13 07:29:30
Also in:
linux-serial, lkml
Subsystem:
gpio subsystem, the rest · Maintainers:
Linus Walleij, Bartosz Golaszewski, Linus Torvalds
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,
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2.12.0