X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=drivers%2Fstaging%2Fandroid%2Ftimed_gpio.c;h=be7cdaa783ae2fbdf79a444f370b35e352002646;hb=241e12879be74fdfadf3abc820a2e3c455599c3c;hp=903270cbbe0201d28df7cfe1ba0038249c494b21;hpb=abcea2c322cef559ef2f108b4763d107a5ccc37f;p=firefly-linux-kernel-4.4.55.git diff --git a/drivers/staging/android/timed_gpio.c b/drivers/staging/android/timed_gpio.c index 903270cbbe02..be7cdaa783ae 100644 --- a/drivers/staging/android/timed_gpio.c +++ b/drivers/staging/android/timed_gpio.c @@ -20,13 +20,12 @@ #include #include +#include "timed_output.h" #include "timed_gpio.h" -static struct class *timed_gpio_class; - struct timed_gpio_data { - struct device *dev; + struct timed_output_dev dev; struct hrtimer timer; spinlock_t lock; unsigned gpio; @@ -36,70 +35,62 @@ struct timed_gpio_data { static enum hrtimer_restart gpio_timer_func(struct hrtimer *timer) { - struct timed_gpio_data *gpio_data = container_of(timer, struct timed_gpio_data, timer); + struct timed_gpio_data *data = + container_of(timer, struct timed_gpio_data, timer); - gpio_direction_output(gpio_data->gpio, gpio_data->active_low ? 1 : 0); + gpio_direction_output(data->gpio, data->active_low ? 1 : 0); return HRTIMER_NORESTART; } -static ssize_t gpio_enable_show(struct device *dev, struct device_attribute *attr, char *buf) +static int gpio_get_time(struct timed_output_dev *dev) { - struct timed_gpio_data *gpio_data = dev_get_drvdata(dev); - int remaining; + struct timed_gpio_data *data = + container_of(dev, struct timed_gpio_data, dev); - if (hrtimer_active(&gpio_data->timer)) { - ktime_t r = hrtimer_get_remaining(&gpio_data->timer); + if (hrtimer_active(&data->timer)) { + ktime_t r = hrtimer_get_remaining(&data->timer); struct timeval t = ktime_to_timeval(r); - remaining = t.tv_sec * 1000 + t.tv_usec; + return t.tv_sec * 1000 + t.tv_usec / 1000; } else - remaining = 0; - - return sprintf(buf, "%d\n", remaining); + return 0; } -static ssize_t gpio_enable_store( - struct device *dev, struct device_attribute *attr, - const char *buf, size_t size) +static void gpio_enable(struct timed_output_dev *dev, int value) { - struct timed_gpio_data *gpio_data = dev_get_drvdata(dev); - int value; + struct timed_gpio_data *data = + container_of(dev, struct timed_gpio_data, dev); unsigned long flags; - sscanf(buf, "%d", &value); - - spin_lock_irqsave(&gpio_data->lock, flags); + spin_lock_irqsave(&data->lock, flags); /* cancel previous timer and set GPIO according to value */ - hrtimer_cancel(&gpio_data->timer); - gpio_direction_output(gpio_data->gpio, gpio_data->active_low ? !value : !!value); + hrtimer_cancel(&data->timer); + gpio_direction_output(data->gpio, data->active_low ? !value : !!value); if (value > 0) { - if (value > gpio_data->max_timeout) - value = gpio_data->max_timeout; + if (value > data->max_timeout) + value = data->max_timeout; - hrtimer_start(&gpio_data->timer, - ktime_set(value / 1000, (value % 1000) * 1000000), - HRTIMER_MODE_REL); + hrtimer_start(&data->timer, + ktime_set(value / 1000, (value % 1000) * 1000000), + HRTIMER_MODE_REL); } - spin_unlock_irqrestore(&gpio_data->lock, flags); - - return size; + spin_unlock_irqrestore(&data->lock, flags); } -static DEVICE_ATTR(enable, S_IRUGO | S_IWUSR, gpio_enable_show, gpio_enable_store); - static int timed_gpio_probe(struct platform_device *pdev) { struct timed_gpio_platform_data *pdata = pdev->dev.platform_data; struct timed_gpio *cur_gpio; struct timed_gpio_data *gpio_data, *gpio_dat; - int i, ret = 0; + int i, j, ret = 0; if (!pdata) return -EBUSY; - gpio_data = kzalloc(sizeof(struct timed_gpio_data) * pdata->num_gpios, GFP_KERNEL); + gpio_data = kzalloc(sizeof(struct timed_gpio_data) * pdata->num_gpios, + GFP_KERNEL); if (!gpio_data) return -ENOMEM; @@ -107,23 +98,26 @@ static int timed_gpio_probe(struct platform_device *pdev) cur_gpio = &pdata->gpios[i]; gpio_dat = &gpio_data[i]; - hrtimer_init(&gpio_dat->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); + hrtimer_init(&gpio_dat->timer, CLOCK_MONOTONIC, + HRTIMER_MODE_REL); gpio_dat->timer.function = gpio_timer_func; spin_lock_init(&gpio_dat->lock); + gpio_dat->dev.name = cur_gpio->name; + gpio_dat->dev.get_time = gpio_get_time; + gpio_dat->dev.enable = gpio_enable; + ret = timed_output_dev_register(&gpio_dat->dev); + if (ret < 0) { + for (j = 0; j < i; j++) + timed_output_dev_unregister(&gpio_data[i].dev); + kfree(gpio_data); + return ret; + } + gpio_dat->gpio = cur_gpio->gpio; gpio_dat->max_timeout = cur_gpio->max_timeout; gpio_dat->active_low = cur_gpio->active_low; gpio_direction_output(gpio_dat->gpio, gpio_dat->active_low); - - gpio_dat->dev = device_create(timed_gpio_class, &pdev->dev, 0, "%s", cur_gpio->name); - if (unlikely(IS_ERR(gpio_dat->dev))) - return PTR_ERR(gpio_dat->dev); - - dev_set_drvdata(gpio_dat->dev, gpio_dat); - ret = device_create_file(gpio_dat->dev, &dev_attr_enable); - if (ret) - return ret; } platform_set_drvdata(pdev, gpio_data); @@ -137,10 +131,8 @@ static int timed_gpio_remove(struct platform_device *pdev) struct timed_gpio_data *gpio_data = platform_get_drvdata(pdev); int i; - for (i = 0; i < pdata->num_gpios; i++) { - device_remove_file(gpio_data[i].dev, &dev_attr_enable); - device_unregister(gpio_data[i].dev); - } + for (i = 0; i < pdata->num_gpios; i++) + timed_output_dev_unregister(&gpio_data[i].dev); kfree(gpio_data); @@ -151,22 +143,18 @@ static struct platform_driver timed_gpio_driver = { .probe = timed_gpio_probe, .remove = timed_gpio_remove, .driver = { - .name = "timed-gpio", + .name = TIMED_GPIO_NAME, .owner = THIS_MODULE, }, }; static int __init timed_gpio_init(void) { - timed_gpio_class = class_create(THIS_MODULE, "timed_output"); - if (IS_ERR(timed_gpio_class)) - return PTR_ERR(timed_gpio_class); return platform_driver_register(&timed_gpio_driver); } static void __exit timed_gpio_exit(void) { - class_destroy(timed_gpio_class); platform_driver_unregister(&timed_gpio_driver); }