Release 4.7 drivers/extcon/extcon-gpio.c
/*
* extcon_gpio.c - Single-state GPIO extcon driver based on extcon class
*
* Copyright (C) 2008 Google, Inc.
* Author: Mike Lockwood <lockwood@android.com>
*
* Modified by MyungJoo Ham <myungjoo.ham@samsung.com> to support extcon
* (originally switch class is supported)
*
* 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.
*/
#include <linux/extcon.h>
#include <linux/extcon/extcon-gpio.h>
#include <linux/gpio.h>
#include <linux/gpio/consumer.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/workqueue.h>
struct gpio_extcon_data {
struct extcon_dev *edev;
int irq;
struct delayed_work work;
unsigned long debounce_jiffies;
struct gpio_desc *id_gpiod;
struct gpio_extcon_pdata *pdata;
};
static void gpio_extcon_work(struct work_struct *work)
{
int state;
struct gpio_extcon_data *data =
container_of(to_delayed_work(work), struct gpio_extcon_data,
work);
state = gpiod_get_value_cansleep(data->id_gpiod);
if (data->pdata->gpio_active_low)
state = !state;
extcon_set_state(data->edev, state);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| myungjoo ham | myungjoo ham | 48 | 76.19% | 1 | 25.00% |
| guenter roeck | guenter roeck | 11 | 17.46% | 1 | 25.00% |
| chanwoo choi | chanwoo choi | 4 | 6.35% | 2 | 50.00% |
| Total | 63 | 100.00% | 4 | 100.00% |
static irqreturn_t gpio_irq_handler(int irq, void *dev_id)
{
struct gpio_extcon_data *data = dev_id;
queue_delayed_work(system_power_efficient_wq, &data->work,
data->debounce_jiffies);
return IRQ_HANDLED;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| myungjoo ham | myungjoo ham | 31 | 83.78% | 1 | 33.33% |
| chanwoo choi | chanwoo choi | 3 | 8.11% | 1 | 33.33% |
| mark brown | mark brown | 3 | 8.11% | 1 | 33.33% |
| Total | 37 | 100.00% | 3 | 100.00% |
static int gpio_extcon_init(struct device *dev, struct gpio_extcon_data *data)
{
struct gpio_extcon_pdata *pdata = data->pdata;
int ret;
ret = devm_gpio_request_one(dev, pdata->gpio, GPIOF_DIR_IN,
dev_name(dev));
if (ret < 0)
return ret;
data->id_gpiod = gpio_to_desc(pdata->gpio);
if (!data->id_gpiod)
return -EINVAL;
if (pdata->debounce) {
ret = gpiod_set_debounce(data->id_gpiod,
pdata->debounce * 1000);
if (ret < 0)
data->debounce_jiffies =
msecs_to_jiffies(pdata->debounce);
}
data->irq = gpiod_to_irq(data->id_gpiod);
if (data->irq < 0)
return data->irq;
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| chanwoo choi | chanwoo choi | 144 | 100.00% | 1 | 100.00% |
| Total | 144 | 100.00% | 1 | 100.00% |
static int gpio_extcon_probe(struct platform_device *pdev)
{
struct gpio_extcon_pdata *pdata = dev_get_platdata(&pdev->dev);
struct gpio_extcon_data *data;
int ret;
if (!pdata)
return -EBUSY;
if (!pdata->irq_flags || pdata->extcon_id > EXTCON_NONE)
return -EINVAL;
data = devm_kzalloc(&pdev->dev, sizeof(struct gpio_extcon_data),
GFP_KERNEL);
if (!data)
return -ENOMEM;
data->pdata = pdata;
/* Initialize the gpio */
ret = gpio_extcon_init(&pdev->dev, data);
if (ret < 0)
return ret;
/* Allocate the memory of extcon devie and register extcon device */
data->edev = devm_extcon_dev_allocate(&pdev->dev, &pdata->extcon_id);
if (IS_ERR(data->edev)) {
dev_err(&pdev->dev, "failed to allocate extcon device\n");
return -ENOMEM;
}
ret = devm_extcon_dev_register(&pdev->dev, data->edev);
if (ret < 0)
return ret;
INIT_DELAYED_WORK(&data->work, gpio_extcon_work);
/*
* Request the interrupt of gpio to detect whether external connector
* is attached or detached.
*/
ret = devm_request_any_context_irq(&pdev->dev, data->irq,
gpio_irq_handler, pdata->irq_flags,
pdev->name, data);
if (ret < 0)
return ret;
platform_set_drvdata(pdev, data);
/* Perform initial detection */
gpio_extcon_work(&data->work.work);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| myungjoo ham | myungjoo ham | 138 | 56.10% | 1 | 7.14% |
| chanwoo choi | chanwoo choi | 52 | 21.14% | 5 | 35.71% |
| guenter roeck | guenter roeck | 31 | 12.60% | 2 | 14.29% |
| axel lin | axel lin | 9 | 3.66% | 2 | 14.29% |
| sangjung woo | sangjung woo | 8 | 3.25% | 1 | 7.14% |
| jingoo han | jingoo han | 4 | 1.63% | 1 | 7.14% |
| rongjun ying | rongjun ying | 3 | 1.22% | 1 | 7.14% |
| moritz fischer | moritz fischer | 1 | 0.41% | 1 | 7.14% |
| Total | 246 | 100.00% | 14 | 100.00% |
static int gpio_extcon_remove(struct platform_device *pdev)
{
struct gpio_extcon_data *data = platform_get_drvdata(pdev);
cancel_delayed_work_sync(&data->work);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| myungjoo ham | myungjoo ham | 30 | 93.75% | 1 | 50.00% |
| chanwoo choi | chanwoo choi | 2 | 6.25% | 1 | 50.00% |
| Total | 32 | 100.00% | 2 | 100.00% |
#ifdef CONFIG_PM_SLEEP
static int gpio_extcon_resume(struct device *dev)
{
struct gpio_extcon_data *data;
data = dev_get_drvdata(dev);
if (data->pdata->check_on_resume)
queue_delayed_work(system_power_efficient_wq,
&data->work, data->debounce_jiffies);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| rongjun ying | rongjun ying | 41 | 85.42% | 1 | 50.00% |
| chanwoo choi | chanwoo choi | 7 | 14.58% | 1 | 50.00% |
| Total | 48 | 100.00% | 2 | 100.00% |
#endif
static SIMPLE_DEV_PM_OPS(gpio_extcon_pm_ops, NULL, gpio_extcon_resume);
static struct platform_driver gpio_extcon_driver = {
.probe = gpio_extcon_probe,
.remove = gpio_extcon_remove,
.driver = {
.name = "extcon-gpio",
.pm = &gpio_extcon_pm_ops,
},
};
module_platform_driver(gpio_extcon_driver);
MODULE_AUTHOR("Mike Lockwood <lockwood@android.com>");
MODULE_DESCRIPTION("GPIO extcon driver");
MODULE_LICENSE("GPL");
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| myungjoo ham | myungjoo ham | 334 | 47.51% | 1 | 5.00% |
| chanwoo choi | chanwoo choi | 226 | 32.15% | 6 | 30.00% |
| rongjun ying | rongjun ying | 58 | 8.25% | 1 | 5.00% |
| guenter roeck | guenter roeck | 42 | 5.97% | 3 | 15.00% |
| jingoo han | jingoo han | 10 | 1.42% | 2 | 10.00% |
| george cherian | george cherian | 10 | 1.42% | 1 | 5.00% |
| axel lin | axel lin | 9 | 1.28% | 2 | 10.00% |
| sangjung woo | sangjung woo | 8 | 1.14% | 1 | 5.00% |
| mark brown | mark brown | 3 | 0.43% | 1 | 5.00% |
| h hartley sweeten | h hartley sweeten | 2 | 0.28% | 1 | 5.00% |
| moritz fischer | moritz fischer | 1 | 0.14% | 1 | 5.00% |
| Total | 703 | 100.00% | 20 | 100.00% |
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