diff options
| -rw-r--r-- | drivers/gpio/gpio-pcf857x.c | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/drivers/gpio/gpio-pcf857x.c b/drivers/gpio/gpio-pcf857x.c index 612fb8d7b380..815944db37bf 100644 --- a/drivers/gpio/gpio-pcf857x.c +++ b/drivers/gpio/gpio-pcf857x.c @@ -69,6 +69,7 @@ struct pcf857x { spinlock_t slock; /* protect irq demux */ unsigned out; /* software latch */ unsigned status; /* current status */ + unsigned irq_mapped; /* mapped gpio irqs */ int (*write)(struct i2c_client *client, unsigned data); int (*read)(struct i2c_client *client); @@ -161,8 +162,13 @@ static void pcf857x_set(struct gpio_chip *chip, unsigned offset, int value) static int pcf857x_to_irq(struct gpio_chip *chip, unsigned offset) { struct pcf857x *gpio = container_of(chip, struct pcf857x, chip); + int ret; - return irq_create_mapping(gpio->irq_domain, offset); + ret = irq_create_mapping(gpio->irq_domain, offset); + if (ret > 0) + gpio->irq_mapped |= (1 << offset); + + return ret; } static irqreturn_t pcf857x_irq(int irq, void *data) @@ -174,7 +180,12 @@ static irqreturn_t pcf857x_irq(int irq, void *data) spin_lock_irqsave(&gpio->slock, flags); - change = gpio->status ^ status; + /* + * call the interrupt handler iff gpio is used as + * interrupt source, just to avoid bad irqs + */ + + change = ((gpio->status ^ status) & gpio->irq_mapped); for_each_set_bit(i, &change, gpio->chip.ngpio) generic_handle_irq(irq_find_mapping(gpio->irq_domain, i)); gpio->status = status; @@ -187,9 +198,14 @@ static irqreturn_t pcf857x_irq(int irq, void *data) static int pcf857x_irq_domain_map(struct irq_domain *domain, unsigned int virq, irq_hw_number_t hw) { + struct pcf857x *gpio = domain->host_data; + irq_set_chip_and_handler(virq, &dummy_irq_chip, handle_level_irq); + set_irq_flags(virq, IRQF_VALID); + gpio->irq_mapped |= (1 << hw); + return 0; } @@ -212,7 +228,7 @@ static int pcf857x_irq_domain_init(struct pcf857x *gpio, gpio->irq_domain = irq_domain_add_linear(client->dev.of_node, gpio->chip.ngpio, &pcf857x_irq_domain_ops, - NULL); + gpio); if (!gpio->irq_domain) goto fail; |