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gpio: Fix bit masking in Kontron PLD GPIO driver

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This patch fixes the bit masking within the GPIO driver. The masking is
basically done twice which causes the wrong GPIOs to be addressed.

Signed-off-by: Michael Brunner <michael.brunner@kontron.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Brunner Michael 2013-07-31 20:55:39 +02:00 committed by Linus Walleij
parent 40a625daa8
commit 2e7f612264
1 changed files with 9 additions and 15 deletions
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24
drivers/gpio/gpio-kempld.c
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@ -46,9 +46,9 @@ static void kempld_gpio_bitop(struct kempld_device_data *pld,
status = kempld_read8(pld, reg);
if (val)
status |= (1 << bit);
status |= KEMPLD_GPIO_MASK(bit);
else
status &= ~(1 << bit);
status &= ~KEMPLD_GPIO_MASK(bit);
kempld_write8(pld, reg, status);
}
@ -60,7 +60,7 @@ static int kempld_gpio_get_bit(struct kempld_device_data *pld, u8 reg, u8 bit)
status = kempld_read8(pld, reg);
kempld_release_mutex(pld);
return !!(status & (1 << bit));
return !!(status & KEMPLD_GPIO_MASK(bit));
}
static int kempld_gpio_get(struct gpio_chip *chip, unsigned offset)
@ -69,8 +69,7 @@ static int kempld_gpio_get(struct gpio_chip *chip, unsigned offset)
= container_of(chip, struct kempld_gpio_data, chip);
struct kempld_device_data *pld = gpio->pld;
return kempld_gpio_get_bit(pld, KEMPLD_GPIO_LVL_NUM(offset),
KEMPLD_GPIO_MASK(offset));
return kempld_gpio_get_bit(pld, KEMPLD_GPIO_LVL_NUM(offset), offset);
}
static void kempld_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
@ -80,8 +79,7 @@ static void kempld_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
struct kempld_device_data *pld = gpio->pld;
kempld_get_mutex(pld);
kempld_gpio_bitop(pld, KEMPLD_GPIO_LVL_NUM(offset),
KEMPLD_GPIO_MASK(offset), value);
kempld_gpio_bitop(pld, KEMPLD_GPIO_LVL_NUM(offset), offset, value);
kempld_release_mutex(pld);
}
@ -92,8 +90,7 @@ static int kempld_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
struct kempld_device_data *pld = gpio->pld;
kempld_get_mutex(pld);
kempld_gpio_bitop(pld, KEMPLD_GPIO_DIR_NUM(offset),
KEMPLD_GPIO_MASK(offset), 0);
kempld_gpio_bitop(pld, KEMPLD_GPIO_DIR_NUM(offset), offset, 0);
kempld_release_mutex(pld);
return 0;
@ -107,10 +104,8 @@ static int kempld_gpio_direction_output(struct gpio_chip *chip, unsigned offset,
struct kempld_device_data *pld = gpio->pld;
kempld_get_mutex(pld);
kempld_gpio_bitop(pld, KEMPLD_GPIO_LVL_NUM(offset),
KEMPLD_GPIO_MASK(offset), value);
kempld_gpio_bitop(pld, KEMPLD_GPIO_DIR_NUM(offset),
KEMPLD_GPIO_MASK(offset), 1);
kempld_gpio_bitop(pld, KEMPLD_GPIO_LVL_NUM(offset), offset, value);
kempld_gpio_bitop(pld, KEMPLD_GPIO_DIR_NUM(offset), offset, 1);
kempld_release_mutex(pld);
return 0;
@ -122,8 +117,7 @@ static int kempld_gpio_get_direction(struct gpio_chip *chip, unsigned offset)
= container_of(chip, struct kempld_gpio_data, chip);
struct kempld_device_data *pld = gpio->pld;
return kempld_gpio_get_bit(pld, KEMPLD_GPIO_DIR_NUM(offset),
KEMPLD_GPIO_MASK(offset));
return kempld_gpio_get_bit(pld, KEMPLD_GPIO_DIR_NUM(offset), offset);
}
static int kempld_gpio_pincount(struct kempld_device_data *pld)