提交 2e7f6122 编写于 作者: B Brunner Michael 提交者: Linus Walleij

gpio: Fix bit masking in Kontron PLD GPIO driver

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: NMichael Brunner <michael.brunner@kontron.com>
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
上级 40a625da
......@@ -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)
......
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册