leds/leds-gpio: merge platform_driver with of_platform_driver

Both interfaces can be driven with the same driver, and
of_platform_driver is getting removed.  This patch merges the two
driver registrations.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

1 files changed, 87 insertions, 127 deletions

diff --git a/drivers/leds/leds-gpio.c b/drivers/leds/leds-gpio.c
index 4d9fa38d9ff6..b0480c8fbcbf 100644
--- a/drivers/leds/leds-gpio.c
+++ b/drivers/leds/leds-gpio.c
@@ -14,6 +14,8 @@
 #include <linux/init.h>
 #include <linux/platform_device.h>
 #include <linux/leds.h>
+#include <linux/of_platform.h>
+#include <linux/of_gpio.h>
 #include <linux/slab.h>
 #include <linux/workqueue.h>
 
@@ -151,96 +153,34 @@ static void delete_gpio_led(struct gpio_led_data *led)
         gpio_free(led->gpio);
 }
 
-#ifdef CONFIG_LEDS_GPIO_PLATFORM
-static int __devinit gpio_led_probe(struct platform_device *pdev)
-{
-        struct gpio_led_platform_data *pdata = pdev->dev.platform_data;
-        struct gpio_led_data *leds_data;
-        int i, ret = 0;
-
-        if (!pdata)
-                return -EBUSY;
-
-        leds_data = kzalloc(sizeof(struct gpio_led_data) * pdata->num_leds,
-                                GFP_KERNEL);
-        if (!leds_data)
-                return -ENOMEM;
-
-        for (i = 0; i < pdata->num_leds; i++) {
-                ret = create_gpio_led(&pdata->leds[i], &leds_data[i],
-                                      &pdev->dev, pdata->gpio_blink_set);
-                if (ret < 0)
-                        goto err;
-        }
-
-        platform_set_drvdata(pdev, leds_data);
-
-        return 0;
-
-err:
-        for (i = i - 1; i >= 0; i--)
-                delete_gpio_led(&leds_data[i]);
-
-        kfree(leds_data);
-
-        return ret;
-}
+struct gpio_leds_priv {
+        int num_leds;
+        struct gpio_led_data leds[];
+};
 
-static int __devexit gpio_led_remove(struct platform_device *pdev)
+static inline int sizeof_gpio_leds_priv(int num_leds)
 {
-        int i;
-        struct gpio_led_platform_data *pdata = pdev->dev.platform_data;
-        struct gpio_led_data *leds_data;
-
-        leds_data = platform_get_drvdata(pdev);
-
-        for (i = 0; i < pdata->num_leds; i++)
-                delete_gpio_led(&leds_data[i]);
-
-        kfree(leds_data);
-
-        return 0;
+        return sizeof(struct gpio_leds_priv) +
+                (sizeof(struct gpio_led_data) * num_leds);
 }
 
-static struct platform_driver gpio_led_driver = {
-        .probe          = gpio_led_probe,
-        .remove         = __devexit_p(gpio_led_remove),
-        .driver         = {
-                .name   = "leds-gpio",
-                .owner  = THIS_MODULE,
-        },
-};
-
-MODULE_ALIAS("platform:leds-gpio");
-#endif /* CONFIG_LEDS_GPIO_PLATFORM */
-
 /* Code to create from OpenFirmware platform devices */
 #ifdef CONFIG_LEDS_GPIO_OF
-#include <linux/of_platform.h>
-#include <linux/of_gpio.h>
-
-struct gpio_led_of_platform_data {
-        int num_leds;
-        struct gpio_led_data led_data[];
-};
-
-static int __devinit of_gpio_leds_probe(struct platform_device *ofdev,
-                                        const struct of_device_id *match)
+static struct gpio_leds_priv * __devinit gpio_leds_create_of(struct platform_device *pdev)
 {
-        struct device_node *np = ofdev->dev.of_node, *child;
-        struct gpio_led_of_platform_data *pdata;
+        struct device_node *np = pdev->dev.of_node, *child;
+        struct gpio_leds_priv *priv;
         int count = 0, ret;
 
-        /* count LEDs defined by this device, so we know how much to allocate */
+        /* count LEDs in this device, so we know how much to allocate */
         for_each_child_of_node(np, child)
                 count++;
         if (!count)
-                return 0; /* or ENODEV? */
+                return NULL;
 
-        pdata = kzalloc(sizeof(*pdata) + sizeof(struct gpio_led_data) * count,
-                        GFP_KERNEL);
-        if (!pdata)
-                return -ENOMEM;
+        priv = kzalloc(sizeof_gpio_leds_priv(count), GFP_KERNEL);
+        if (!priv)
+                return NULL;
 
         for_each_child_of_node(np, child) {
                 struct gpio_led led = {};
@@ -256,92 +196,112 @@ static int __devinit of_gpio_leds_probe(struct platform_device *ofdev,
                 if (state) {
                         if (!strcmp(state, "keep"))
                                 led.default_state = LEDS_GPIO_DEFSTATE_KEEP;
-                        else if(!strcmp(state, "on"))
+                        else if (!strcmp(state, "on"))
                                 led.default_state = LEDS_GPIO_DEFSTATE_ON;
                         else
                                 led.default_state = LEDS_GPIO_DEFSTATE_OFF;
                 }
 
-                ret = create_gpio_led(&led, &pdata->led_data[pdata->num_leds++],
-                                      &ofdev->dev, NULL);
+                ret = create_gpio_led(&led, &priv->leds[priv->num_leds++],
+                                      &pdev->dev, NULL);
                 if (ret < 0) {
                         of_node_put(child);
                         goto err;
                 }
         }
 
-        dev_set_drvdata(&ofdev->dev, pdata);
-
-        return 0;
+        return priv;
 
 err:
-        for (count = pdata->num_leds - 2; count >= 0; count--)
-                delete_gpio_led(&pdata->led_data[count]);
+        for (count = priv->num_leds - 2; count >= 0; count--)
+                delete_gpio_led(&priv->leds[count]);
+        kfree(priv);
+        return NULL;
+}
 
-        kfree(pdata);
+static const struct of_device_id of_gpio_leds_match[] = {
+        { .compatible = "gpio-leds", },
+        {},
+};
+#else
+static struct gpio_leds_priv * __devinit gpio_leds_create_of(struct platform_device *pdev)
+{
+        return NULL;
+}
+#define of_gpio_leds_match NULL
+#endif
 
-        return ret;
+
+static int __devinit gpio_led_probe(struct platform_device *pdev)
+{
+        struct gpio_led_platform_data *pdata = pdev->dev.platform_data;
+        struct gpio_leds_priv *priv;
+        int i, ret = 0;
+
+        if (pdata && pdata->num_leds) {
+                priv = kzalloc(sizeof_gpio_leds_priv(pdata->num_leds),
+                                GFP_KERNEL);
+                if (!priv)
+                        return -ENOMEM;
+
+                priv->num_leds = pdata->num_leds;
+                for (i = 0; i < priv->num_leds; i++) {
+                        ret = create_gpio_led(&pdata->leds[i],
+                                              &priv->leds[i],
+                                              &pdev->dev, pdata->gpio_blink_set);
+                        if (ret < 0) {
+                                /* On failure: unwind the led creations */
+                                for (i = i - 1; i >= 0; i--)
+                                        delete_gpio_led(&priv->leds[i]);
+                                kfree(priv);
+                                return ret;
+                        }
+                }
+        } else {
+                priv = gpio_leds_create_of(pdev);
+                if (!priv)
+                        return -ENODEV;
+        }
+
+        platform_set_drvdata(pdev, priv);
+
+        return 0;
 }
 
-static int __devexit of_gpio_leds_remove(struct platform_device *ofdev)
+static int __devexit gpio_led_remove(struct platform_device *pdev)
 {
-        struct gpio_led_of_platform_data *pdata = dev_get_drvdata(&ofdev->dev);
+        struct gpio_leds_priv *priv = dev_get_drvdata(&pdev->dev);
         int i;
 
-        for (i = 0; i < pdata->num_leds; i++)
-                delete_gpio_led(&pdata->led_data[i]);
-
-        kfree(pdata);
+        for (i = 0; i < priv->num_leds; i++)
+                delete_gpio_led(&priv->leds[i]);
 
-        dev_set_drvdata(&ofdev->dev, NULL);
+        dev_set_drvdata(&pdev->dev, NULL);
+        kfree(priv);
 
         return 0;
 }
 
-static const struct of_device_id of_gpio_leds_match[] = {
-        { .compatible = "gpio-leds", },
-        {},
-};
-
-static struct of_platform_driver of_gpio_leds_driver = {
-        .driver = {
-                .name = "of_gpio_leds",
-                .owner = THIS_MODULE,
+static struct platform_driver gpio_led_driver = {
+        .probe          = gpio_led_probe,
+        .remove         = __devexit_p(gpio_led_remove),
+        .driver         = {
+                .name   = "leds-gpio",
+                .owner  = THIS_MODULE,
                 .of_match_table = of_gpio_leds_match,
         },
-        .probe = of_gpio_leds_probe,
-        .remove = __devexit_p(of_gpio_leds_remove),
 };
-#endif
+
+MODULE_ALIAS("platform:leds-gpio");
 
 static int __init gpio_led_init(void)
 {
-        int ret = 0;
-
-#ifdef CONFIG_LEDS_GPIO_PLATFORM        
-        ret = platform_driver_register(&gpio_led_driver);
-        if (ret)
-                return ret;
-#endif
-#ifdef CONFIG_LEDS_GPIO_OF
-        ret = of_register_platform_driver(&of_gpio_leds_driver);
-#endif
-#ifdef CONFIG_LEDS_GPIO_PLATFORM        
-        if (ret)
-                platform_driver_unregister(&gpio_led_driver);
-#endif
-
-        return ret;
+        return platform_driver_register(&gpio_led_driver);
 }
 
 static void __exit gpio_led_exit(void)
 {
-#ifdef CONFIG_LEDS_GPIO_PLATFORM
         platform_driver_unregister(&gpio_led_driver);
-#endif
-#ifdef CONFIG_LEDS_GPIO_OF
-        of_unregister_platform_driver(&of_gpio_leds_driver);
-#endif
 }
 
 module_init(gpio_led_init);