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authorblogic <blogic@3c298f89-4303-0410-b956-a3cf2f4a3e73>2012-12-21 20:03:49 +0000
committerblogic <blogic@3c298f89-4303-0410-b956-a3cf2f4a3e73>2012-12-21 20:03:49 +0000
commit75a9d0e41bea08df20e675551beb1a6d278ccdaf (patch)
tree583d894d8c76e56bd837ba05a3e081e15489a376 /package
parentb05c7e7166ad2ee56956f188059b66055b415582 (diff)
[gpio-button-hotplug] add OF binding
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@34834 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'package')
-rw-r--r--package/system/gpio-button-hotplug/src/gpio-button-hotplug.c120
1 files changed, 117 insertions, 3 deletions
diff --git a/package/system/gpio-button-hotplug/src/gpio-button-hotplug.c b/package/system/gpio-button-hotplug/src/gpio-button-hotplug.c
index d25e70fec..f667a327f 100644
--- a/package/system/gpio-button-hotplug/src/gpio-button-hotplug.c
+++ b/package/system/gpio-button-hotplug/src/gpio-button-hotplug.c
@@ -24,7 +24,7 @@
#include <linux/kobject.h>
#include <linux/input.h>
#include <linux/platform_device.h>
-#include <linux/gpio.h>
+#include <linux/of_gpio.h>
#include <linux/gpio_keys.h>
#define DRV_NAME "gpio-keys-polled"
@@ -90,6 +90,7 @@ static struct bh_map button_map[] = {
BH_MAP(BTN_8, "BTN_8"),
BH_MAP(BTN_9, "BTN_9"),
BH_MAP(KEY_RESTART, "reset"),
+ BH_MAP(KEY_RFKILL, "rfkill"),
#ifdef KEY_WPS_BUTTON
BH_MAP(KEY_WPS_BUTTON, "wps"),
#endif /* KEY_WPS_BUTTON */
@@ -322,6 +323,100 @@ static void __devinit gpio_keys_polled_open(struct gpio_keys_polled_dev *bdev)
gpio_keys_polled_queue_work(bdev);
}
+#ifdef CONFIG_OF
+static struct gpio_keys_platform_data * __devinit
+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;
+ int error;
+ int nbuttons;
+ int i;
+
+ node = dev->of_node;
+ if (!node)
+ return NULL;
+
+ nbuttons = of_get_child_count(node);
+ if (nbuttons == 0)
+ return NULL;
+
+ pdata = kzalloc(sizeof(*pdata) + nbuttons * (sizeof *button),
+ GFP_KERNEL);
+ if (!pdata) {
+ error = -ENOMEM;
+ goto err_out;
+ }
+
+ 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);
+
+ i = 0;
+ for_each_child_of_node(node, pp) {
+ enum of_gpio_flags flags;
+
+ if (!of_find_property(pp, "gpios", NULL)) {
+ pdata->nbuttons--;
+ dev_warn(dev, "Found button without gpios\n");
+ continue;
+ }
+
+ button = &pdata->buttons[i++];
+
+ button->gpio = of_get_gpio_flags(pp, 0, &flags);
+ 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);
+ error = -EINVAL;
+ goto err_free_pdata;
+ }
+
+ button->desc = of_get_property(pp, "label", NULL);
+
+ if (of_property_read_u32(pp, "linux,input-type", &button->type))
+ button->type = EV_KEY;
+
+ button->wakeup = !!of_get_property(pp, "gpio-key,wakeup", NULL);
+
+ if (of_property_read_u32(pp, "debounce-interval",
+ &button->debounce_interval))
+ button->debounce_interval = 5;
+ }
+
+ if (pdata->nbuttons == 0) {
+ error = -EINVAL;
+ goto err_free_pdata;
+ }
+
+ return pdata;
+
+err_free_pdata:
+ kfree(pdata);
+err_out:
+ return ERR_PTR(error);
+}
+
+static struct of_device_id gpio_keys_polled_of_match[] = {
+ { .compatible = "gpio-keys-polled", },
+ { },
+};
+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 void __devexit gpio_keys_polled_close(struct gpio_keys_polled_dev *bdev)
{
struct gpio_keys_platform_data *pdata = bdev->pdata;
@@ -340,8 +435,21 @@ static int __devinit gpio_keys_polled_probe(struct platform_device *pdev)
int error;
int i;
- if (!pdata || !pdata->poll_interval)
- return -EINVAL;
+ if (!pdata) {
+ pdata = gpio_keys_polled_get_devtree_pdata(dev);
+ if (IS_ERR(pdata))
+ return PTR_ERR(pdata);
+ if (!pdata) {
+ dev_err(dev, "missing platform data\n");
+ return -EINVAL;
+ }
+ }
+
+ if (!pdata->poll_interval) {
+ dev_err(dev, "missing poll_interval value\n");
+ error = -EINVAL;
+ goto err_free_pdata;
+ }
bdev = kzalloc(sizeof(struct gpio_keys_polled_dev) +
pdata->nbuttons * sizeof(struct gpio_keys_button_data),
@@ -401,6 +509,11 @@ err_free_gpio:
kfree(bdev);
platform_set_drvdata(pdev, NULL);
+err_free_pdata:
+ /* If we have no platform_data, we allocated pdata dynamically. */
+ if (!dev_get_platdata(&pdev->dev))
+ kfree(pdata);
+
return error;
}
@@ -427,6 +540,7 @@ 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),
},
};