diff options
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/gpio-pcf857x.c | 46 |
1 files changed, 35 insertions, 11 deletions
diff --git a/drivers/gpio/gpio-pcf857x.c b/drivers/gpio/gpio-pcf857x.c index 83db0e19ec7e..404f3c61ef9b 100644 --- a/drivers/gpio/gpio-pcf857x.c +++ b/drivers/gpio/gpio-pcf857x.c @@ -92,6 +92,7 @@ struct pcf857x { unsigned out; /* software latch */ unsigned status; /* current status */ unsigned int irq_parent; + unsigned irq_enabled; /* enabled irqs */ int (*write)(struct i2c_client *client, unsigned data); int (*read)(struct i2c_client *client); @@ -195,7 +196,7 @@ static irqreturn_t pcf857x_irq(int irq, void *data) * interrupt source, just to avoid bad irqs */ - change = (gpio->status ^ status); + change = (gpio->status ^ status) & gpio->irq_enabled; for_each_set_bit(i, &change, gpio->chip.ngpio) handle_nested_irq(irq_find_mapping(gpio->chip.irqdomain, i)); gpio->status = status; @@ -210,14 +211,10 @@ static irqreturn_t pcf857x_irq(int irq, void *data) */ static void noop(struct irq_data *data) { } -static unsigned int noop_ret(struct irq_data *data) -{ - return 0; -} - static int pcf857x_irq_set_wake(struct irq_data *data, unsigned int on) { struct pcf857x *gpio = irq_data_get_irq_chip_data(data); + int error = 0; if (gpio->irq_parent) { @@ -229,20 +226,47 @@ static int pcf857x_irq_set_wake(struct irq_data *data, unsigned int on) gpio->irq_parent = 0; } } - return error; } +static void pcf857x_irq_enable(struct irq_data *data) +{ + struct pcf857x *gpio = irq_data_get_irq_chip_data(data); + + gpio->irq_enabled |= (1 << data->hwirq); +} + +static void pcf857x_irq_disable(struct irq_data *data) +{ + struct pcf857x *gpio = irq_data_get_irq_chip_data(data); + + gpio->irq_enabled &= ~(1 << data->hwirq); +} + +static void pcf857x_irq_bus_lock(struct irq_data *data) +{ + struct pcf857x *gpio = irq_data_get_irq_chip_data(data); + + mutex_lock(&gpio->lock); +} + +static void pcf857x_irq_bus_sync_unlock(struct irq_data *data) +{ + struct pcf857x *gpio = irq_data_get_irq_chip_data(data); + + mutex_unlock(&gpio->lock); +} + static struct irq_chip pcf857x_irq_chip = { .name = "pcf857x", - .irq_startup = noop_ret, - .irq_shutdown = noop, - .irq_enable = noop, - .irq_disable = noop, + .irq_enable = pcf857x_irq_enable, + .irq_disable = pcf857x_irq_disable, .irq_ack = noop, .irq_mask = noop, .irq_unmask = noop, .irq_set_wake = pcf857x_irq_set_wake, + .irq_bus_lock = pcf857x_irq_bus_lock, + .irq_bus_sync_unlock = pcf857x_irq_bus_sync_unlock, }; /*-------------------------------------------------------------------------*/ |