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-rw-r--r--drivers/gpio/gpio-pcf857x.c46
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,
};
/*-------------------------------------------------------------------------*/