Release 4.7 drivers/hwmon/jz4740-hwmon.c
/*
* Copyright (C) 2009-2010, Lars-Peter Clausen <lars@metafoo.de>
* JZ4740 SoC HWMON 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/err.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/io.h>
#include <linux/completion.h>
#include <linux/mfd/core.h>
#include <linux/hwmon.h>
struct jz4740_hwmon {
void __iomem *base;
int irq;
const struct mfd_cell *cell;
struct device *hwmon;
struct completion read_completion;
struct mutex lock;
};
static ssize_t jz4740_hwmon_show_name(struct device *dev,
struct device_attribute *dev_attr, char *buf)
{
return sprintf(buf, "jz4740\n");
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| lars-peter clausen | lars-peter clausen | 28 | 100.00% | 1 | 100.00% |
| Total | 28 | 100.00% | 1 | 100.00% |
static irqreturn_t jz4740_hwmon_irq(int irq, void *data)
{
struct jz4740_hwmon *hwmon = data;
complete(&hwmon->read_completion);
return IRQ_HANDLED;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| lars-peter clausen | lars-peter clausen | 31 | 100.00% | 1 | 100.00% |
| Total | 31 | 100.00% | 1 | 100.00% |
static ssize_t jz4740_hwmon_read_adcin(struct device *dev,
struct device_attribute *dev_attr, char *buf)
{
struct jz4740_hwmon *hwmon = dev_get_drvdata(dev);
struct completion *completion = &hwmon->read_completion;
long t;
unsigned long val;
int ret;
mutex_lock(&hwmon->lock);
reinit_completion(completion);
enable_irq(hwmon->irq);
hwmon->cell->enable(to_platform_device(dev));
t = wait_for_completion_interruptible_timeout(completion, HZ);
if (t > 0) {
val = readw(hwmon->base) & 0xfff;
val = (val * 3300) >> 12;
ret = sprintf(buf, "%lu\n", val);
} else {
ret = t ? t : -ETIMEDOUT;
}
hwmon->cell->disable(to_platform_device(dev));
disable_irq(hwmon->irq);
mutex_unlock(&hwmon->lock);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| lars-peter clausen | lars-peter clausen | 172 | 99.42% | 1 | 50.00% |
| wolfram sang | wolfram sang | 1 | 0.58% | 1 | 50.00% |
| Total | 173 | 100.00% | 2 | 100.00% |
static DEVICE_ATTR(name, S_IRUGO, jz4740_hwmon_show_name, NULL);
static DEVICE_ATTR(in0_input, S_IRUGO, jz4740_hwmon_read_adcin, NULL);
static struct attribute *jz4740_hwmon_attributes[] = {
&dev_attr_name.attr,
&dev_attr_in0_input.attr,
NULL
};
static const struct attribute_group jz4740_hwmon_attr_group = {
.attrs = jz4740_hwmon_attributes,
};
static int jz4740_hwmon_probe(struct platform_device *pdev)
{
int ret;
struct jz4740_hwmon *hwmon;
struct resource *mem;
hwmon = devm_kzalloc(&pdev->dev, sizeof(*hwmon), GFP_KERNEL);
if (!hwmon)
return -ENOMEM;
hwmon->cell = mfd_get_cell(pdev);
hwmon->irq = platform_get_irq(pdev, 0);
if (hwmon->irq < 0) {
dev_err(&pdev->dev, "Failed to get platform irq: %d\n",
hwmon->irq);
return hwmon->irq;
}
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
hwmon->base = devm_ioremap_resource(&pdev->dev, mem);
if (IS_ERR(hwmon->base))
return PTR_ERR(hwmon->base);
init_completion(&hwmon->read_completion);
mutex_init(&hwmon->lock);
platform_set_drvdata(pdev, hwmon);
ret = devm_request_irq(&pdev->dev, hwmon->irq, jz4740_hwmon_irq, 0,
pdev->name, hwmon);
if (ret) {
dev_err(&pdev->dev, "Failed to request irq: %d\n", ret);
return ret;
}
disable_irq(hwmon->irq);
ret = sysfs_create_group(&pdev->dev.kobj, &jz4740_hwmon_attr_group);
if (ret) {
dev_err(&pdev->dev, "Failed to create sysfs group: %d\n", ret);
return ret;
}
hwmon->hwmon = hwmon_device_register(&pdev->dev);
if (IS_ERR(hwmon->hwmon)) {
ret = PTR_ERR(hwmon->hwmon);
goto err_remove_file;
}
return 0;
err_remove_file:
sysfs_remove_group(&pdev->dev.kobj, &jz4740_hwmon_attr_group);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| lars-peter clausen | lars-peter clausen | 262 | 84.79% | 1 | 25.00% |
| guenter roeck | guenter roeck | 32 | 10.36% | 1 | 25.00% |
| jingoo han | jingoo han | 12 | 3.88% | 1 | 25.00% |
| andres salomon | andres salomon | 3 | 0.97% | 1 | 25.00% |
| Total | 309 | 100.00% | 4 | 100.00% |
static int jz4740_hwmon_remove(struct platform_device *pdev)
{
struct jz4740_hwmon *hwmon = platform_get_drvdata(pdev);
hwmon_device_unregister(hwmon->hwmon);
sysfs_remove_group(&pdev->dev.kobj, &jz4740_hwmon_attr_group);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| lars-peter clausen | lars-peter clausen | 44 | 100.00% | 1 | 100.00% |
| Total | 44 | 100.00% | 1 | 100.00% |
static struct platform_driver jz4740_hwmon_driver = {
.probe = jz4740_hwmon_probe,
.remove = jz4740_hwmon_remove,
.driver = {
.name = "jz4740-hwmon",
},
};
module_platform_driver(jz4740_hwmon_driver);
MODULE_DESCRIPTION("JZ4740 SoC HWMON driver");
MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:jz4740-hwmon");
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| lars-peter clausen | lars-peter clausen | 707 | 92.90% | 1 | 12.50% |
| guenter roeck | guenter roeck | 35 | 4.60% | 1 | 12.50% |
| jingoo han | jingoo han | 12 | 1.58% | 1 | 12.50% |
| andres salomon | andres salomon | 4 | 0.53% | 2 | 25.00% |
| axel lin | axel lin | 2 | 0.26% | 2 | 25.00% |
| wolfram sang | wolfram sang | 1 | 0.13% | 1 | 12.50% |
| Total | 761 | 100.00% | 8 | 100.00% |
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