diff options
author | John Crispin <blogic@openwrt.org> | 2012-12-21 20:03:49 +0000 |
---|---|---|
committer | John Crispin <blogic@openwrt.org> | 2012-12-21 20:03:49 +0000 |
commit | d417c0b4feba5cfe3eefdc2ea4225beef5eac391 (patch) | |
tree | 583d894d8c76e56bd837ba05a3e081e15489a376 /package | |
parent | 99a3a72f113aafc4330441b303e9a0757e3d70e2 (diff) | |
download | master-187ad058-d417c0b4feba5cfe3eefdc2ea4225beef5eac391.tar.gz master-187ad058-d417c0b4feba5cfe3eefdc2ea4225beef5eac391.tar.bz2 master-187ad058-d417c0b4feba5cfe3eefdc2ea4225beef5eac391.zip |
[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.c | 120 |
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 d25e70fec4..f667a327fe 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), }, }; |