diff options
Diffstat (limited to 'drivers/gpio/pca953x.c')
| -rw-r--r-- | drivers/gpio/pca953x.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/drivers/gpio/pca953x.c b/drivers/gpio/pca953x.c index ab5daab14bc..b827c976dc6 100644 --- a/drivers/gpio/pca953x.c +++ b/drivers/gpio/pca953x.c @@ -18,6 +18,7 @@ #include <linux/irq.h> #include <linux/i2c.h> #include <linux/i2c/pca953x.h> +#include <linux/slab.h> #ifdef CONFIG_OF_GPIO #include <linux/of_platform.h> #include <linux/of_gpio.h> @@ -251,6 +252,18 @@ static void pca953x_irq_bus_lock(unsigned int irq) static void pca953x_irq_bus_sync_unlock(unsigned int irq) { struct pca953x_chip *chip = get_irq_chip_data(irq); + uint16_t new_irqs; + uint16_t level; + + /* Look for any newly setup interrupt */ + new_irqs = chip->irq_trig_fall | chip->irq_trig_raise; + new_irqs &= ~chip->reg_direction; + + while (new_irqs) { + level = __ffs(new_irqs); + pca953x_gpio_direction_input(&chip->gpio_chip, level); + new_irqs &= ~(1 << level); + } mutex_unlock(&chip->irq_lock); } @@ -277,7 +290,7 @@ static int pca953x_irq_set_type(unsigned int irq, unsigned int type) else chip->irq_trig_raise &= ~mask; - return pca953x_gpio_direction_input(&chip->gpio_chip, level); + return 0; } static struct irq_chip pca953x_irq_chip = { |