Input: gpio_keys - constify platform data

The platform data should not be altered and therefore should be
accessed through const pointers.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

diff --git a/drivers/input/keyboard/gpio_keys.c b/drivers/input/keyboard/gpio_keys.c
index ed1ed469d0850028118683c4bf66df11ef03effc..19887fc10282caec9cf5473b8f472611383d2051 100644 (file)
--- a/drivers/input/keyboard/gpio_keys.c
+++ b/drivers/input/keyboard/gpio_keys.c
@@ -30,7 +30,7 @@
 #include <linux/of_gpio.h>
 
 struct gpio_button_data {
-       struct gpio_keys_button *button;
+       const struct gpio_keys_button *button;
        struct input_dev *input;
        struct timer_list timer;
        struct work_struct work;
@@ -322,7 +322,7 @@ static struct attribute_group gpio_keys_attr_group = {
 
 static void gpio_keys_report_event(struct gpio_button_data *bdata)
 {
-       struct gpio_keys_button *button = bdata->button;
+       const struct gpio_keys_button *button = bdata->button;
        struct input_dev *input = bdata->input;
        unsigned int type = button->type ?: EV_KEY;
        int state = (gpio_get_value_cansleep(button->gpio) ? 1 : 0) ^ button->active_low;
@@ -354,7 +354,7 @@ static void gpio_keys_timer(unsigned long _data)
 static irqreturn_t gpio_keys_isr(int irq, void *dev_id)
 {
        struct gpio_button_data *bdata = dev_id;
-       struct gpio_keys_button *button = bdata->button;
+       const struct gpio_keys_button *button = bdata->button;
 
        BUG_ON(irq != gpio_to_irq(button->gpio));
 
@@ -368,8 +368,9 @@ static irqreturn_t gpio_keys_isr(int irq, void *dev_id)
 }
 
 static int __devinit gpio_keys_setup_key(struct platform_device *pdev,
+                                        struct input_dev *input,
                                         struct gpio_button_data *bdata,
-                                        struct gpio_keys_button *button)
+                                        const struct gpio_keys_button *button)
 {
        const char *desc = button->desc ? button->desc : "gpio_keys";
        struct device *dev = &pdev->dev;
@@ -378,6 +379,8 @@ static int __devinit gpio_keys_setup_key(struct platform_device *pdev,
 
        setup_timer(&bdata->timer, gpio_keys_timer, (unsigned long)bdata);
        INIT_WORK(&bdata->work, gpio_keys_work_func);
+       bdata->input = input;
+       bdata->button = button;
 
        error = gpio_request(button->gpio, desc);
        if (error < 0) {
@@ -425,6 +428,7 @@ static int __devinit gpio_keys_setup_key(struct platform_device *pdev,
                goto fail3;
        }
 
+       input_set_capability(input, button->type ?: EV_KEY, button->code);
        return 0;
 
 fail3:
@@ -549,7 +553,7 @@ static int gpio_keys_get_devtree_pdata(struct device *dev,
 
 static int __devinit gpio_keys_probe(struct platform_device *pdev)
 {
-       struct gpio_keys_platform_data *pdata = pdev->dev.platform_data;
+       const struct gpio_keys_platform_data *pdata = pdev->dev.platform_data;
        struct gpio_keys_drvdata *ddata;
        struct device *dev = &pdev->dev;
        struct gpio_keys_platform_data alt_pdata;
@@ -599,21 +603,15 @@ static int __devinit gpio_keys_probe(struct platform_device *pdev)
                __set_bit(EV_REP, input->evbit);
 
        for (i = 0; i < pdata->nbuttons; i++) {
-               struct gpio_keys_button *button = &pdata->buttons[i];
+               const struct gpio_keys_button *button = &pdata->buttons[i];
                struct gpio_button_data *bdata = &ddata->data[i];
-               unsigned int type = button->type ?: EV_KEY;
 
-               bdata->input = input;
-               bdata->button = button;
-
-               error = gpio_keys_setup_key(pdev, bdata, button);
+               error = gpio_keys_setup_key(pdev, input, bdata, button);
                if (error)
                        goto fail2;
 
                if (button->wakeup)
                        wakeup = 1;
-
-               input_set_capability(input, type, button->code);
        }
 
        error = sysfs_create_group(&pdev->dev.kobj, &gpio_keys_attr_group);
@@ -699,11 +697,12 @@ static int __devexit gpio_keys_remove(struct platform_device *pdev)
 static int gpio_keys_suspend(struct device *dev)
 {
        struct gpio_keys_drvdata *ddata = dev_get_drvdata(dev);
+       const struct gpio_keys_button *button;
        int i;
 
        if (device_may_wakeup(dev)) {
                for (i = 0; i < ddata->n_buttons; i++) {
-                       struct gpio_keys_button *button = ddata->data[i].button;
+                       button = ddata->data[i].button;
                        if (button->wakeup) {
                                int irq = gpio_to_irq(button->gpio);
                                enable_irq_wake(irq);
@@ -717,11 +716,11 @@ static int gpio_keys_suspend(struct device *dev)
 static int gpio_keys_resume(struct device *dev)
 {
        struct gpio_keys_drvdata *ddata = dev_get_drvdata(dev);
+       const struct gpio_keys_button *button;
        int i;
 
        for (i = 0; i < ddata->n_buttons; i++) {
-
-               struct gpio_keys_button *button = ddata->data[i].button;
+               button = ddata->data[i].button;
                if (button->wakeup && device_may_wakeup(dev)) {
                        int irq = gpio_to_irq(button->gpio);
                        disable_irq_wake(irq);