diff options
Diffstat (limited to 'drivers/media/rc/gpio-ir-recv.c')
| -rw-r--r-- | drivers/media/rc/gpio-ir-recv.c | 90 |
1 files changed, 69 insertions, 21 deletions
diff --git a/drivers/media/rc/gpio-ir-recv.c b/drivers/media/rc/gpio-ir-recv.c index 0d875450c5c..29b5f89813b 100644 --- a/drivers/media/rc/gpio-ir-recv.c +++ b/drivers/media/rc/gpio-ir-recv.c @@ -16,6 +16,8 @@ #include <linux/interrupt.h> #include <linux/gpio.h> #include <linux/slab.h> +#include <linux/of.h> +#include <linux/of_gpio.h> #include <linux/platform_device.h> #include <linux/irq.h> #include <media/rc-core.h> @@ -30,6 +32,45 @@ struct gpio_rc_dev { bool active_low; }; +#ifdef CONFIG_OF +/* + * Translate OpenFirmware node properties into platform_data + */ +static int gpio_ir_recv_get_devtree_pdata(struct device *dev, + struct gpio_ir_recv_platform_data *pdata) +{ + struct device_node *np = dev->of_node; + enum of_gpio_flags flags; + int gpio; + + gpio = of_get_gpio_flags(np, 0, &flags); + if (gpio < 0) { + if (gpio != -EPROBE_DEFER) + dev_err(dev, "Failed to get gpio flags (%d)\n", gpio); + return gpio; + } + + pdata->gpio_nr = gpio; + pdata->active_low = (flags & OF_GPIO_ACTIVE_LOW); + /* probe() takes care of map_name == NULL or allowed_protos == 0 */ + pdata->map_name = of_get_property(np, "linux,rc-map-name", NULL); + pdata->allowed_protos = 0; + + return 0; +} + +static struct of_device_id gpio_ir_recv_of_match[] = { + { .compatible = "gpio-ir-receiver", }, + { }, +}; +MODULE_DEVICE_TABLE(of, gpio_ir_recv_of_match); + +#else /* !CONFIG_OF */ + +#define gpio_ir_recv_get_devtree_pdata(dev, pdata) (-ENOSYS) + +#endif + static irqreturn_t gpio_ir_recv_irq(int irq, void *dev_id) { struct gpio_rc_dev *gpio_dev = dev_id; @@ -58,7 +99,7 @@ err_get_value: return IRQ_HANDLED; } -static int __devinit gpio_ir_recv_probe(struct platform_device *pdev) +static int gpio_ir_recv_probe(struct platform_device *pdev) { struct gpio_rc_dev *gpio_dev; struct rc_dev *rcdev; @@ -66,6 +107,17 @@ static int __devinit gpio_ir_recv_probe(struct platform_device *pdev) pdev->dev.platform_data; int rc; + if (pdev->dev.of_node) { + struct gpio_ir_recv_platform_data *dtpdata = + devm_kzalloc(&pdev->dev, sizeof(*dtpdata), GFP_KERNEL); + if (!dtpdata) + return -ENOMEM; + rc = gpio_ir_recv_get_devtree_pdata(&pdev->dev, dtpdata); + if (rc) + return rc; + pdata = dtpdata; + } + if (!pdata) return -EINVAL; @@ -82,12 +134,21 @@ static int __devinit gpio_ir_recv_probe(struct platform_device *pdev) goto err_allocate_device; } + rcdev->priv = gpio_dev; rcdev->driver_type = RC_DRIVER_IR_RAW; - rcdev->allowed_protos = RC_TYPE_ALL; rcdev->input_name = GPIO_IR_DEVICE_NAME; + rcdev->input_phys = GPIO_IR_DEVICE_NAME "/input0"; rcdev->input_id.bustype = BUS_HOST; + rcdev->input_id.vendor = 0x0001; + rcdev->input_id.product = 0x0001; + rcdev->input_id.version = 0x0100; + rcdev->dev.parent = &pdev->dev; rcdev->driver_name = GPIO_IR_DRIVER_NAME; - rcdev->map_name = RC_MAP_EMPTY; + if (pdata->allowed_protos) + rc_set_allowed_protocols(rcdev, pdata->allowed_protos); + else + rc_set_allowed_protocols(rcdev, RC_BIT_ALL); + rcdev->map_name = pdata->map_name ?: RC_MAP_EMPTY; gpio_dev->rcdev = rcdev; gpio_dev->gpio_nr = pdata->gpio_nr; @@ -118,28 +179,25 @@ static int __devinit gpio_ir_recv_probe(struct platform_device *pdev) return 0; err_request_irq: - platform_set_drvdata(pdev, NULL); rc_unregister_device(rcdev); + rcdev = NULL; err_register_rc_device: err_gpio_direction_input: gpio_free(pdata->gpio_nr); err_gpio_request: rc_free_device(rcdev); - rcdev = NULL; err_allocate_device: kfree(gpio_dev); return rc; } -static int __devexit gpio_ir_recv_remove(struct platform_device *pdev) +static int gpio_ir_recv_remove(struct platform_device *pdev) { struct gpio_rc_dev *gpio_dev = platform_get_drvdata(pdev); free_irq(gpio_to_irq(gpio_dev->gpio_nr), gpio_dev); - platform_set_drvdata(pdev, NULL); rc_unregister_device(gpio_dev->rcdev); gpio_free(gpio_dev->gpio_nr); - rc_free_device(gpio_dev->rcdev); kfree(gpio_dev); return 0; } @@ -179,27 +237,17 @@ static const struct dev_pm_ops gpio_ir_recv_pm_ops = { static struct platform_driver gpio_ir_recv_driver = { .probe = gpio_ir_recv_probe, - .remove = __devexit_p(gpio_ir_recv_remove), + .remove = gpio_ir_recv_remove, .driver = { .name = GPIO_IR_DRIVER_NAME, .owner = THIS_MODULE, + .of_match_table = of_match_ptr(gpio_ir_recv_of_match), #ifdef CONFIG_PM .pm = &gpio_ir_recv_pm_ops, #endif }, }; - -static int __init gpio_ir_recv_init(void) -{ - return platform_driver_register(&gpio_ir_recv_driver); -} -module_init(gpio_ir_recv_init); - -static void __exit gpio_ir_recv_exit(void) -{ - platform_driver_unregister(&gpio_ir_recv_driver); -} -module_exit(gpio_ir_recv_exit); +module_platform_driver(gpio_ir_recv_driver); MODULE_DESCRIPTION("GPIO IR Receiver driver"); MODULE_LICENSE("GPL v2"); |