diff options
author | Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 12:17:53 -0700 |
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committer | Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 15:44:42 -0700 |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/drivers/staging/android/timed_output.c | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/drivers/staging/android/timed_output.c')
-rw-r--r-- | kernel/drivers/staging/android/timed_output.c | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/kernel/drivers/staging/android/timed_output.c b/kernel/drivers/staging/android/timed_output.c new file mode 100644 index 000000000..b41429f37 --- /dev/null +++ b/kernel/drivers/staging/android/timed_output.c @@ -0,0 +1,120 @@ +/* drivers/misc/timed_output.c + * + * Copyright (C) 2009 Google, Inc. + * Author: Mike Lockwood <lockwood@android.com> + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#define pr_fmt(fmt) "timed_output: " fmt + +#include <linux/module.h> +#include <linux/types.h> +#include <linux/device.h> +#include <linux/fs.h> +#include <linux/err.h> + +#include "timed_output.h" + +static struct class *timed_output_class; +static atomic_t device_count; + +static ssize_t enable_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct timed_output_dev *tdev = dev_get_drvdata(dev); + int remaining = tdev->get_time(tdev); + + return sprintf(buf, "%d\n", remaining); +} + +static ssize_t enable_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t size) +{ + struct timed_output_dev *tdev = dev_get_drvdata(dev); + int value; + int rc; + + rc = kstrtoint(buf, 0, &value); + if (rc != 0) + return -EINVAL; + + tdev->enable(tdev, value); + + return size; +} +static DEVICE_ATTR_RW(enable); + +static struct attribute *timed_output_attrs[] = { + &dev_attr_enable.attr, + NULL, +}; +ATTRIBUTE_GROUPS(timed_output); + +static int create_timed_output_class(void) +{ + if (!timed_output_class) { + timed_output_class = class_create(THIS_MODULE, "timed_output"); + if (IS_ERR(timed_output_class)) + return PTR_ERR(timed_output_class); + atomic_set(&device_count, 0); + timed_output_class->dev_groups = timed_output_groups; + } + + return 0; +} + +int timed_output_dev_register(struct timed_output_dev *tdev) +{ + int ret; + + if (!tdev || !tdev->name || !tdev->enable || !tdev->get_time) + return -EINVAL; + + ret = create_timed_output_class(); + if (ret < 0) + return ret; + + tdev->index = atomic_inc_return(&device_count); + tdev->dev = device_create(timed_output_class, NULL, + MKDEV(0, tdev->index), NULL, "%s", tdev->name); + if (IS_ERR(tdev->dev)) + return PTR_ERR(tdev->dev); + + dev_set_drvdata(tdev->dev, tdev); + tdev->state = 0; + return 0; +} +EXPORT_SYMBOL_GPL(timed_output_dev_register); + +void timed_output_dev_unregister(struct timed_output_dev *tdev) +{ + tdev->enable(tdev, 0); + device_destroy(timed_output_class, MKDEV(0, tdev->index)); +} +EXPORT_SYMBOL_GPL(timed_output_dev_unregister); + +static int __init timed_output_init(void) +{ + return create_timed_output_class(); +} + +static void __exit timed_output_exit(void) +{ + class_destroy(timed_output_class); +} + +module_init(timed_output_init); +module_exit(timed_output_exit); + +MODULE_AUTHOR("Mike Lockwood <lockwood@android.com>"); +MODULE_DESCRIPTION("timed output class driver"); +MODULE_LICENSE("GPL"); |