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path: root/drivers/gpio/gpio-ath79.c
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Diffstat (limited to 'drivers/gpio/gpio-ath79.c')
-rw-r--r--drivers/gpio/gpio-ath79.c66
1 files changed, 27 insertions, 39 deletions
diff --git a/drivers/gpio/gpio-ath79.c b/drivers/gpio/gpio-ath79.c
index 6c6dcda1100c..f1a5ea9b3de2 100644
--- a/drivers/gpio/gpio-ath79.c
+++ b/drivers/gpio/gpio-ath79.c
@@ -222,14 +222,16 @@ MODULE_DEVICE_TABLE(of, ath79_gpio_of_match);
static int ath79_gpio_probe(struct platform_device *pdev)
{
struct ath79_gpio_platform_data *pdata = dev_get_platdata(&pdev->dev);
- struct device_node *np = pdev->dev.of_node;
+ struct device *dev = &pdev->dev;
+ struct device_node *np = dev->of_node;
struct ath79_gpio_ctrl *ctrl;
+ struct gpio_irq_chip *girq;
struct resource *res;
u32 ath79_gpio_count;
bool oe_inverted;
int err;
- ctrl = devm_kzalloc(&pdev->dev, sizeof(*ctrl), GFP_KERNEL);
+ ctrl = devm_kzalloc(dev, sizeof(*ctrl), GFP_KERNEL);
if (!ctrl)
return -ENOMEM;
platform_set_drvdata(pdev, ctrl);
@@ -237,7 +239,7 @@ static int ath79_gpio_probe(struct platform_device *pdev)
if (np) {
err = of_property_read_u32(np, "ngpios", &ath79_gpio_count);
if (err) {
- dev_err(&pdev->dev, "ngpios property is not valid\n");
+ dev_err(dev, "ngpios property is not valid\n");
return err;
}
oe_inverted = of_device_is_compatible(np, "qca,ar9340-gpio");
@@ -245,25 +247,24 @@ static int ath79_gpio_probe(struct platform_device *pdev)
ath79_gpio_count = pdata->ngpios;
oe_inverted = pdata->oe_inverted;
} else {
- dev_err(&pdev->dev, "No DT node or platform data found\n");
+ dev_err(dev, "No DT node or platform data found\n");
return -EINVAL;
}
if (ath79_gpio_count >= 32) {
- dev_err(&pdev->dev, "ngpios must be less than 32\n");
+ dev_err(dev, "ngpios must be less than 32\n");
return -EINVAL;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res)
return -EINVAL;
- ctrl->base = devm_ioremap_nocache(
- &pdev->dev, res->start, resource_size(res));
+ ctrl->base = devm_ioremap_nocache(dev, res->start, resource_size(res));
if (!ctrl->base)
return -ENOMEM;
raw_spin_lock_init(&ctrl->lock);
- err = bgpio_init(&ctrl->gc, &pdev->dev, 4,
+ err = bgpio_init(&ctrl->gc, dev, 4,
ctrl->base + AR71XX_GPIO_REG_IN,
ctrl->base + AR71XX_GPIO_REG_SET,
ctrl->base + AR71XX_GPIO_REG_CLEAR,
@@ -271,45 +272,33 @@ static int ath79_gpio_probe(struct platform_device *pdev)
oe_inverted ? ctrl->base + AR71XX_GPIO_REG_OE : NULL,
0);
if (err) {
- dev_err(&pdev->dev, "bgpio_init failed\n");
+ dev_err(dev, "bgpio_init failed\n");
return err;
}
/* Use base 0 to stay compatible with legacy platforms */
ctrl->gc.base = 0;
- err = gpiochip_add_data(&ctrl->gc, ctrl);
- if (err) {
- dev_err(&pdev->dev,
- "cannot add AR71xx GPIO chip, error=%d", err);
- return err;
+ /* Optional interrupt setup */
+ if (!np || of_property_read_bool(np, "interrupt-controller")) {
+ girq = &ctrl->gc.irq;
+ girq->chip = &ath79_gpio_irqchip;
+ girq->parent_handler = ath79_gpio_irq_handler;
+ girq->num_parents = 1;
+ girq->parents = devm_kcalloc(dev, 1, sizeof(*girq->parents),
+ GFP_KERNEL);
+ if (!girq->parents)
+ return -ENOMEM;
+ girq->parents[0] = platform_get_irq(pdev, 0);
+ girq->default_type = IRQ_TYPE_NONE;
+ girq->handler = handle_simple_irq;
}
- if (np && !of_property_read_bool(np, "interrupt-controller"))
- return 0;
-
- err = gpiochip_irqchip_add(&ctrl->gc, &ath79_gpio_irqchip, 0,
- handle_simple_irq, IRQ_TYPE_NONE);
+ err = devm_gpiochip_add_data(dev, &ctrl->gc, ctrl);
if (err) {
- dev_err(&pdev->dev, "failed to add gpiochip_irqchip\n");
- goto gpiochip_remove;
+ dev_err(dev,
+ "cannot add AR71xx GPIO chip, error=%d", err);
+ return err;
}
-
- gpiochip_set_chained_irqchip(&ctrl->gc, &ath79_gpio_irqchip,
- platform_get_irq(pdev, 0),
- ath79_gpio_irq_handler);
-
- return 0;
-
-gpiochip_remove:
- gpiochip_remove(&ctrl->gc);
- return err;
-}
-
-static int ath79_gpio_remove(struct platform_device *pdev)
-{
- struct ath79_gpio_ctrl *ctrl = platform_get_drvdata(pdev);
-
- gpiochip_remove(&ctrl->gc);
return 0;
}
@@ -319,7 +308,6 @@ static struct platform_driver ath79_gpio_driver = {
.of_match_table = ath79_gpio_of_match,
},
.probe = ath79_gpio_probe,
- .remove = ath79_gpio_remove,
};
module_platform_driver(ath79_gpio_driver);