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path: root/drivers/gpio
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Diffstat (limited to 'drivers/gpio')
-rw-r--r--drivers/gpio/gpio-pl061.c31
1 files changed, 21 insertions, 10 deletions
diff --git a/drivers/gpio/gpio-pl061.c b/drivers/gpio/gpio-pl061.c
index 2c5a18f32bf3..093c90bd3c1d 100644
--- a/drivers/gpio/gpio-pl061.c
+++ b/drivers/gpio/gpio-pl061.c
@@ -118,7 +118,7 @@ static int pl061_to_irq(struct gpio_chip *gc, unsigned offset)
{
struct pl061_gpio *chip = container_of(gc, struct pl061_gpio, gc);
- if (chip->irq_base == (unsigned) -1)
+ if (chip->irq_base == NO_IRQ)
return -EINVAL;
return chip->irq_base + offset;
@@ -246,6 +246,18 @@ static int pl061_probe(struct amba_device *dev, const struct amba_id *id)
if (chip == NULL)
return -ENOMEM;
+ pdata = dev->dev.platform_data;
+ if (pdata) {
+ chip->gc.base = pdata->gpio_base;
+ chip->irq_base = pdata->irq_base;
+ } else if (dev->dev.of_node) {
+ chip->gc.base = -1;
+ chip->irq_base = NO_IRQ;
+ } else {
+ ret = -ENODEV;
+ goto free_mem;
+ }
+
if (!request_mem_region(dev->res.start,
resource_size(&dev->res), "pl061")) {
ret = -EBUSY;
@@ -267,14 +279,11 @@ static int pl061_probe(struct amba_device *dev, const struct amba_id *id)
chip->gc.get = pl061_get_value;
chip->gc.set = pl061_set_value;
chip->gc.to_irq = pl061_to_irq;
- chip->gc.base = pdata->gpio_base;
chip->gc.ngpio = PL061_GPIO_NR;
chip->gc.label = dev_name(&dev->dev);
chip->gc.dev = &dev->dev;
chip->gc.owner = THIS_MODULE;
- chip->irq_base = pdata->irq_base;
-
ret = gpiochip_add(&chip->gc);
if (ret)
goto iounmap;
@@ -283,7 +292,7 @@ static int pl061_probe(struct amba_device *dev, const struct amba_id *id)
* irq_chip support
*/
- if (chip->irq_base == (unsigned) -1)
+ if (chip->irq_base == NO_IRQ)
return 0;
writeb(0, chip->base + GPIOIE); /* disable irqs */
@@ -307,11 +316,13 @@ static int pl061_probe(struct amba_device *dev, const struct amba_id *id)
list_add(&chip->list, chip_list);
for (i = 0; i < PL061_GPIO_NR; i++) {
- if (pdata->directions & (1 << i))
- pl061_direction_output(&chip->gc, i,
- pdata->values & (1 << i));
- else
- pl061_direction_input(&chip->gc, i);
+ if (pdata) {
+ if (pdata->directions & (1 << i))
+ pl061_direction_output(&chip->gc, i,
+ pdata->values & (1 << i));
+ else
+ pl061_direction_input(&chip->gc, i);
+ }
irq_set_chip_and_handler(i + chip->irq_base, &pl061_irqchip,
handle_simple_irq);