input: gpio_keys_polled: Make use of device property API

Make use of device property API in this driver so that both OF based
system and ACPI based system can use this driver.

Signed-off-by: Aaron Lu <aaron.lu@intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Acked-by: Grant Likely <grant.likely@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

1 files changed, 24 insertions, 49 deletions

diff --git a/drivers/input/keyboard/gpio_keys_polled.c b/drivers/input/keyboard/gpio_keys_polled.c
index b7a514ced509..c9c1c8ca7267 100644
--- a/drivers/input/keyboard/gpio_keys_polled.c
+++ b/drivers/input/keyboard/gpio_keys_polled.c
@@ -25,9 +25,7 @@
 #include <linux/gpio.h>
 #include <linux/gpio/consumer.h>
 #include <linux/gpio_keys.h>
-#include <linux/of.h>
-#include <linux/of_platform.h>
-#include <linux/of_gpio.h>
+#include <linux/property.h>
 
 #define DRV_NAME        "gpio-keys-polled"
 
@@ -102,21 +100,15 @@ static void gpio_keys_polled_close(struct input_polled_dev *dev)
                 pdata->disable(bdev->dev);
 }
 
-#ifdef CONFIG_OF
 static struct gpio_keys_platform_data *gpio_keys_polled_get_devtree_pdata(struct device *dev)
 {
-        struct device_node *node, *pp;
         struct gpio_keys_platform_data *pdata;
         struct gpio_keys_button *button;
+        struct fwnode_handle *child;
         int error;
         int nbuttons;
-        int i;
-
-        node = dev->of_node;
-        if (!node)
-                return NULL;
 
-        nbuttons = of_get_child_count(node);
+        nbuttons = device_get_child_node_count(dev);
         if (nbuttons == 0)
                 return NULL;
 
@@ -126,52 +118,44 @@ static struct gpio_keys_platform_data *gpio_keys_polled_get_devtree_pdata(struct
                 return ERR_PTR(-ENOMEM);
 
         pdata->buttons = (struct gpio_keys_button *)(pdata + 1);
-        pdata->nbuttons = nbuttons;
 
-        pdata->rep = !!of_get_property(node, "autorepeat", NULL);
-        of_property_read_u32(node, "poll-interval", &pdata->poll_interval);
+        pdata->rep = device_property_present(dev, "autorepeat");
+        device_property_read_u32(dev, "poll-interval", &pdata->poll_interval);
 
-        i = 0;
-        for_each_child_of_node(node, pp) {
-                int gpio;
-                enum of_gpio_flags flags;
-
-                if (!of_find_property(pp, "gpios", NULL)) {
-                        pdata->nbuttons--;
-                        dev_warn(dev, "Found button without gpios\n");
-                        continue;
-                }
+        device_for_each_child_node(dev, child) {
+                struct gpio_desc *desc;
 
-                gpio = of_get_gpio_flags(pp, 0, &flags);
-                if (gpio < 0) {
-                        error = gpio;
+                desc = devm_get_gpiod_from_child(dev, child);
+                if (IS_ERR(desc)) {
+                        error = PTR_ERR(desc);
                         if (error != -EPROBE_DEFER)
                                 dev_err(dev,
                                         "Failed to get gpio flags, error: %d\n",
                                         error);
+                        fwnode_handle_put(child);
                         return ERR_PTR(error);
                 }
 
-                button = &pdata->buttons[i++];
+                button = &pdata->buttons[pdata->nbuttons++];
+                button->gpiod = desc;
 
-                button->gpio = gpio;
-                button->active_low = flags & OF_GPIO_ACTIVE_LOW;
-
-                if (of_property_read_u32(pp, "linux,code", &button->code)) {
-                        dev_err(dev, "Button without keycode: 0x%x\n",
-                                button->gpio);
+                if (fwnode_property_read_u32(child, "linux,code", &button->code)) {
+                        dev_err(dev, "Button without keycode: %d\n",
+                                pdata->nbuttons - 1);
+                        fwnode_handle_put(child);
                         return ERR_PTR(-EINVAL);
                 }
 
-                button->desc = of_get_property(pp, "label", NULL);
+                fwnode_property_read_string(child, "label", &button->desc);
 
-                if (of_property_read_u32(pp, "linux,input-type", &button->type))
+                if (fwnode_property_read_u32(child, "linux,input-type",
+                                             &button->type))
                         button->type = EV_KEY;
 
-                button->wakeup = !!of_get_property(pp, "gpio-key,wakeup", NULL);
+                button->wakeup = fwnode_property_present(child, "gpio-key,wakeup");
 
-                if (of_property_read_u32(pp, "debounce-interval",
-                                         &button->debounce_interval))
+                if (fwnode_property_read_u32(child, "debounce-interval",
+                                             &button->debounce_interval))
                         button->debounce_interval = 5;
         }
 
@@ -187,15 +171,6 @@ static const struct of_device_id gpio_keys_polled_of_match[] = {
 };
 MODULE_DEVICE_TABLE(of, gpio_keys_polled_of_match);
 
-#else
-
-static inline struct gpio_keys_platform_data *
-gpio_keys_polled_get_devtree_pdata(struct device *dev)
-{
-        return NULL;
-}
-#endif
-
 static int gpio_keys_polled_probe(struct platform_device *pdev)
 {
         struct device *dev = &pdev->dev;
@@ -323,7 +298,7 @@ static struct platform_driver gpio_keys_polled_driver = {
         .driver = {
                 .name   = DRV_NAME,
                 .owner  = THIS_MODULE,
-                .of_match_table = of_match_ptr(gpio_keys_polled_of_match),
+                .of_match_table = gpio_keys_polled_of_match,
         },
 };
 module_platform_driver(gpio_keys_polled_driver);