Release 4.7 drivers/input/misc/pwm-beeper.c
/*
* Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de>
* PWM beeper driver
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#include <linux/input.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/pwm.h>
#include <linux/slab.h>
#include <linux/workqueue.h>
struct pwm_beeper {
struct input_dev *input;
struct pwm_device *pwm;
struct work_struct work;
unsigned long period;
};
#define HZ_TO_NANOSECONDS(x) (1000000000UL/(x))
static void __pwm_beeper_set(struct pwm_beeper *beeper)
{
unsigned long period = beeper->period;
if (period) {
pwm_config(beeper->pwm, period / 2, period);
pwm_enable(beeper->pwm);
} else
pwm_disable(beeper->pwm);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| manfred schlaegl | manfred schlaegl | 53 | 100.00% | 1 | 100.00% |
| Total | 53 | 100.00% | 1 | 100.00% |
static void pwm_beeper_work(struct work_struct *work)
{
struct pwm_beeper *beeper =
container_of(work, struct pwm_beeper, work);
__pwm_beeper_set(beeper);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| manfred schlaegl | manfred schlaegl | 31 | 100.00% | 1 | 100.00% |
| Total | 31 | 100.00% | 1 | 100.00% |
static int pwm_beeper_event(struct input_dev *input,
unsigned int type, unsigned int code, int value)
{
struct pwm_beeper *beeper = input_get_drvdata(input);
if (type != EV_SND || value < 0)
return -EINVAL;
switch (code) {
case SND_BELL:
value = value ? 1000 : 0;
break;
case SND_TONE:
break;
default:
return -EINVAL;
}
if (value == 0)
beeper->period = 0;
else
beeper->period = HZ_TO_NANOSECONDS(value);
schedule_work(&beeper->work);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| lars-peter clausen | lars-peter clausen | 96 | 90.57% | 1 | 50.00% |
| manfred schlaegl | manfred schlaegl | 10 | 9.43% | 1 | 50.00% |
| Total | 106 | 100.00% | 2 | 100.00% |
static void pwm_beeper_stop(struct pwm_beeper *beeper)
{
cancel_work_sync(&beeper->work);
if (beeper->period)
pwm_disable(beeper->pwm);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| manfred schlaegl | manfred schlaegl | 20 | 62.50% | 1 | 50.00% |
| lars-peter clausen | lars-peter clausen | 12 | 37.50% | 1 | 50.00% |
| Total | 32 | 100.00% | 2 | 100.00% |
static void pwm_beeper_close(struct input_dev *input)
{
struct pwm_beeper *beeper = input_get_drvdata(input);
pwm_beeper_stop(beeper);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| manfred schlaegl | manfred schlaegl | 25 | 96.15% | 1 | 50.00% |
| lars-peter clausen | lars-peter clausen | 1 | 3.85% | 1 | 50.00% |
| Total | 26 | 100.00% | 2 | 100.00% |
static int pwm_beeper_probe(struct platform_device *pdev)
{
unsigned long pwm_id = (unsigned long)dev_get_platdata(&pdev->dev);
struct pwm_beeper *beeper;
int error;
beeper = kzalloc(sizeof(*beeper), GFP_KERNEL);
if (!beeper)
return -ENOMEM;
beeper->pwm = pwm_get(&pdev->dev, NULL);
if (IS_ERR(beeper->pwm)) {
dev_dbg(&pdev->dev, "unable to request PWM, trying legacy API\n");
beeper->pwm = pwm_request(pwm_id, "pwm beeper");
}
if (IS_ERR(beeper->pwm)) {
error = PTR_ERR(beeper->pwm);
dev_err(&pdev->dev, "Failed to request pwm device: %d\n", error);
goto err_free;
}
/*
* FIXME: pwm_apply_args() should be removed when switching to
* the atomic PWM API.
*/
pwm_apply_args(beeper->pwm);
INIT_WORK(&beeper->work, pwm_beeper_work);
beeper->input = input_allocate_device();
if (!beeper->input) {
dev_err(&pdev->dev, "Failed to allocate input device\n");
error = -ENOMEM;
goto err_pwm_free;
}
beeper->input->dev.parent = &pdev->dev;
beeper->input->name = "pwm-beeper";
beeper->input->phys = "pwm/input0";
beeper->input->id.bustype = BUS_HOST;
beeper->input->id.vendor = 0x001f;
beeper->input->id.product = 0x0001;
beeper->input->id.version = 0x0100;
beeper->input->evbit[0] = BIT(EV_SND);
beeper->input->sndbit[0] = BIT(SND_TONE) | BIT(SND_BELL);
beeper->input->event = pwm_beeper_event;
beeper->input->close = pwm_beeper_close;
input_set_drvdata(beeper->input, beeper);
error = input_register_device(beeper->input);
if (error) {
dev_err(&pdev->dev, "Failed to register input device: %d\n", error);
goto err_input_free;
}
platform_set_drvdata(pdev, beeper);
return 0;
err_input_free:
input_free_device(beeper->input);
err_pwm_free:
pwm_free(beeper->pwm);
err_free:
kfree(beeper);
return error;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| lars-peter clausen | lars-peter clausen | 320 | 83.12% | 1 | 20.00% |
| sascha hauer | sascha hauer | 35 | 9.09% | 1 | 20.00% |
| manfred schlaegl | manfred schlaegl | 18 | 4.68% | 1 | 20.00% |
| boris brezillon | boris brezillon | 8 | 2.08% | 1 | 20.00% |
| jingoo han | jingoo han | 4 | 1.04% | 1 | 20.00% |
| Total | 385 | 100.00% | 5 | 100.00% |
static int pwm_beeper_remove(struct platform_device *pdev)
{
struct pwm_beeper *beeper = platform_get_drvdata(pdev);
input_unregister_device(beeper->input);
pwm_free(beeper->pwm);
kfree(beeper);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| lars-peter clausen | lars-peter clausen | 43 | 100.00% | 1 | 100.00% |
| Total | 43 | 100.00% | 1 | 100.00% |
static int __maybe_unused pwm_beeper_suspend(struct device *dev)
{
struct pwm_beeper *beeper = dev_get_drvdata(dev);
pwm_beeper_stop(beeper);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| lars-peter clausen | lars-peter clausen | 28 | 93.33% | 1 | 33.33% |
| jingoo han | jingoo han | 1 | 3.33% | 1 | 33.33% |
| manfred schlaegl | manfred schlaegl | 1 | 3.33% | 1 | 33.33% |
| Total | 30 | 100.00% | 3 | 100.00% |
static int __maybe_unused pwm_beeper_resume(struct device *dev)
{
struct pwm_beeper *beeper = dev_get_drvdata(dev);
if (beeper->period)
__pwm_beeper_set(beeper);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| lars-peter clausen | lars-peter clausen | 34 | 94.44% | 1 | 33.33% |
| jingoo han | jingoo han | 1 | 2.78% | 1 | 33.33% |
| manfred schlaegl | manfred schlaegl | 1 | 2.78% | 1 | 33.33% |
| Total | 36 | 100.00% | 3 | 100.00% |
static SIMPLE_DEV_PM_OPS(pwm_beeper_pm_ops,
pwm_beeper_suspend, pwm_beeper_resume);
#ifdef CONFIG_OF
static const struct of_device_id pwm_beeper_match[] = {
{ .compatible = "pwm-beeper", },
{ },
};
MODULE_DEVICE_TABLE(of, pwm_beeper_match);
#endif
static struct platform_driver pwm_beeper_driver = {
.probe = pwm_beeper_probe,
.remove = pwm_beeper_remove,
.driver = {
.name = "pwm-beeper",
.pm = &pwm_beeper_pm_ops,
.of_match_table = of_match_ptr(pwm_beeper_match),
},
};
module_platform_driver(pwm_beeper_driver);
MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
MODULE_DESCRIPTION("PWM beeper driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:pwm-beeper");
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| lars-peter clausen | lars-peter clausen | 644 | 71.32% | 1 | 10.00% |
| manfred schlaegl | manfred schlaegl | 166 | 18.38% | 1 | 10.00% |
| sascha hauer | sascha hauer | 64 | 7.09% | 1 | 10.00% |
| boris brezillon | boris brezillon | 8 | 0.89% | 1 | 10.00% |
| jingoo han | jingoo han | 8 | 0.89% | 2 | 20.00% |
| luis de bethencourt | luis de bethencourt | 7 | 0.78% | 1 | 10.00% |
| sachin kamat | sachin kamat | 3 | 0.33% | 1 | 10.00% |
| dmitry torokhov | dmitry torokhov | 2 | 0.22% | 1 | 10.00% |
| jj ding | jj ding | 1 | 0.11% | 1 | 10.00% |
| Total | 903 | 100.00% | 10 | 100.00% |
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