static irqreturn_t adp5588_irq_handler(int irq, void *devid)
{
struct adp5588_gpio *dev = devid;
unsigned status, bank, bit, pending;
int ret;
status = adp5588_gpio_read(dev->client, INT_STAT);
if (status & ADP5588_GPI_INT) {
ret = adp5588_gpio_read_intstat(dev->client, dev->irq_stat);
if (ret < 0)
memset(dev->irq_stat, 0, ARRAY_SIZE(dev->irq_stat));
for (bank = 0, bit = 0; bank <= ADP5588_BANK(ADP5588_MAXGPIO);
bank++, bit = 0) {
pending = dev->irq_stat[bank] & dev->irq_mask[bank];
while (pending) {
if (pending & (1 << bit)) {
handle_nested_irq(dev->irq_base +
(bank << 3) + bit);
pending &= ~(1 << bit);
}
bit++;
}
}
}
adp5588_gpio_write(dev->client, INT_STAT, status); /* Status is W1C */
return IRQ_HANDLED;
}
static int adp5588_irq_setup(struct adp5588_gpio *dev)
{
struct i2c_client *client = dev->client;
struct adp5588_gpio_platform_data *pdata =
dev_get_platdata(&client->dev);
unsigned gpio;
int ret;
adp5588_gpio_write(client, CFG, ADP5588_AUTO_INC);
adp5588_gpio_write(client, INT_STAT, -1); /* status is W1C */
adp5588_gpio_read_intstat(client, dev->irq_stat); /* read to clear */
dev->irq_base = pdata->irq_base;
mutex_init(&dev->irq_lock);
for (gpio = 0; gpio < dev->gpio_chip.ngpio; gpio++) {
int irq = gpio + dev->irq_base;
irq_set_chip_data(irq, dev);
irq_set_chip_and_handler(irq, &adp5588_irq_chip,
handle_level_irq);
irq_set_nested_thread(irq, 1);
#ifdef CONFIG_ARM
/*
* ARM needs us to explicitly flag the IRQ as VALID,
* once we do so, it will also set the noprobe.
*/
set_irq_flags(irq, IRQF_VALID);
#else
irq_set_noprobe(irq);
#endif
}
ret = request_threaded_irq(client->irq,
NULL,
adp5588_irq_handler,
IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
dev_name(&client->dev), dev);
if (ret) {
dev_err(&client->dev, "failed to request irq %d\n",
client->irq);
goto out;
}
dev->gpio_chip.to_irq = adp5588_gpio_to_irq;
adp5588_gpio_write(client, CFG,
ADP5588_AUTO_INC | ADP5588_INT_CFG | ADP5588_GPI_INT);
return 0;
out:
dev->irq_base = 0;
return ret;
}
static int adp5588_irq_setup(struct adp5588_gpio *dev)
{
struct i2c_client *client = dev->client;
struct adp5588_gpio_platform_data *pdata =
dev_get_platdata(&client->dev);
unsigned gpio;
int ret;
adp5588_gpio_write(client, CFG, ADP5588_AUTO_INC);
adp5588_gpio_write(client, INT_STAT, -1); /* status is W1C */
adp5588_gpio_read_intstat(client, dev->irq_stat); /* read to clear */
dev->irq_base = pdata->irq_base;
mutex_init(&dev->irq_lock);
for (gpio = 0; gpio < dev->gpio_chip.ngpio; gpio++) {
int irq = gpio + dev->irq_base;
irq_set_chip_data(irq, dev);
irq_set_chip_and_handler(irq, &adp5588_irq_chip,
handle_level_irq);
irq_set_nested_thread(irq, 1);
irq_modify_status(irq, IRQ_NOREQUEST, IRQ_NOPROBE);
}
ret = request_threaded_irq(client->irq,
NULL,
adp5588_irq_handler,
IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
dev_name(&client->dev), dev);
if (ret) {
dev_err(&client->dev, "failed to request irq %d\n",
client->irq);
goto out;
}
dev->gpio_chip.to_irq = adp5588_gpio_to_irq;
adp5588_gpio_write(client, CFG,
ADP5588_AUTO_INC | ADP5588_INT_CFG | ADP5588_GPI_INT);
return 0;
out:
dev->irq_base = 0;
return ret;
}
