@@ -24,6 +24,7 @@
#include <linux/slab.h>
#include <linux/pinctrl/consumer.h>
#include <linux/pm.h>
+#include <linux/platform_device.h>
#define GPIODIR 0x400
#define GPIOIS 0x404
@@ -241,6 +242,94 @@ static struct irq_chip pl061_irqchip = {
.irq_set_type = pl061_irq_type,
};
+static int pl061_platform_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct pl061_platform_data *pdata = dev_get_platdata(dev);
+ struct pl061_gpio *chip;
+ int ret, irq, i, irq_base;
+ struct resource *mem;
+
+ mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!mem)
+ return -EINVAL;
+
+ chip = devm_kzalloc(dev, sizeof(*chip), GFP_KERNEL);
+ if (chip == NULL)
+ return -ENOMEM;
+
+ if (pdata) {
+ chip->gc.base = pdata->gpio_base;
+ irq_base = pdata->irq_base;
+ if (irq_base <= 0) {
+ dev_err(&pdev->dev, "invalid IRQ base in pdata\n");
+ return -ENODEV;
+ }
+ } else {
+ chip->gc.base = -1;
+ irq_base = 0;
+ }
+
+ chip->base = devm_ioremap(dev, mem->start, resource_size(mem));
+ if (IS_ERR(chip->base))
+ return PTR_ERR(chip->base);
+
+ spin_lock_init(&chip->lock);
+ if (of_property_read_bool(dev->of_node, "gpio-ranges"))
+ chip->uses_pinctrl = true;
+
+ chip->gc.request = pl061_gpio_request;
+ chip->gc.free = pl061_gpio_free;
+ chip->gc.direction_input = pl061_direction_input;
+ chip->gc.direction_output = pl061_direction_output;
+ chip->gc.get = pl061_get_value;
+ chip->gc.set = pl061_set_value;
+ chip->gc.ngpio = PL061_GPIO_NR;
+ chip->gc.label = dev_name(dev);
+ chip->gc.dev = dev;
+ chip->gc.owner = THIS_MODULE;
+
+ ret = gpiochip_add(&chip->gc);
+ if (ret)
+ return ret;
+
+ /*
+ * irq_chip support
+ */
+ writeb(0, chip->base + GPIOIE); /* disable irqs */
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
+ dev_err(&pdev->dev, "invalid IRQ\n");
+ return -ENODEV;
+ }
+
+ ret = gpiochip_irqchip_add(&chip->gc, &pl061_irqchip,
+ irq_base, handle_simple_irq,
+ IRQ_TYPE_NONE);
+ if (ret) {
+ dev_info(&pdev->dev, "could not add irqchip\n");
+ return ret;
+ }
+ gpiochip_set_chained_irqchip(&chip->gc, &pl061_irqchip,
+ irq, pl061_irq_handler);
+
+ for (i = 0; i < PL061_GPIO_NR; i++) {
+ if (pdata) {
+ if (pdata->directions & (BIT(i)))
+ pl061_direction_output(&chip->gc, i,
+ pdata->values & (BIT(i)));
+ else
+ pl061_direction_input(&chip->gc, i);
+ }
+ }
+
+ platform_set_drvdata(pdev, chip);
+ dev_info(&pdev->dev, "PL061 GPIO chip @%pa registered\n",
+ &mem->start);
+
+ return 0;
+}
+
static int pl061_probe(struct amba_device *adev, const struct amba_id *id)
{
struct device *dev = &adev->dev;
@@ -376,6 +465,23 @@ static const struct dev_pm_ops pl061_dev_pm_ops = {
};
#endif
+static const struct of_device_id pl061_of_match[] = {
+ { .compatible = "arm,pl061", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, pl061_of_match);
+
+static struct platform_driver pl061_gpio_platform_driver = {
+ .driver = {
+ .name = "pl061_gpio",
+ .of_match_table = pl061_of_match,
+#ifdef CONFIG_PM
+ .pm = &pl061_dev_pm_ops,
+#endif
+ },
+ .probe = pl061_platform_probe,
+};
+
static struct amba_id pl061_ids[] = {
{
.id = 0x00041061,
@@ -399,6 +505,8 @@ static struct amba_driver pl061_gpio_driver = {
static int __init pl061_gpio_init(void)
{
+ if (platform_driver_register(&pl061_gpio_platform_driver))
+ pr_warn("could not register PL061 platform driver\n");
return amba_driver_register(&pl061_gpio_driver);
}
module_init(pl061_gpio_init);