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/*
* RTC device/driver based on SensorHub
* Copyright (C) 2014 Motorola Mobility LLC
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/module.h>
#include <linux/err.h>
#include <linux/rtc.h>
#include <linux/platform_device.h>
static int rtc_sensorhub_rtc_read_alarm(struct device *dev,
struct rtc_wkalrm *alrm)
{
/* TODO : implement a real handler*/
return 0;
}
static int rtc_sensorhub_rtc_set_alarm(struct device *dev,
struct rtc_wkalrm *alrm)
{
/* TODO : implement a real handler*/
return 0;
}
static int rtc_sensorhub_rtc_read_time(struct device *dev,
struct rtc_time *tm)
{
/* TODO : implement a real handler*/
rtc_time_to_tm(get_seconds(), tm);
return 0;
}
static int rtc_sensorhub_rtc_set_time(struct device *dev,
struct rtc_time *tm)
{
/* TODO : implement a real handler*/
pr_err("%s:\n", __func__);
return 0;
}
static int rtc_sensorhub_rtc_set_mmss(struct device *dev, unsigned long secs)
{
/* TODO : implement a real handler*/
dev_info(dev, "%s, secs = %lu\n", __func__, secs);
return 0;
}
static int rtc_sensorhub_rtc_proc(struct device *dev, struct seq_file *seq)
{
/* TODO : implement a real handler*/
struct platform_device *plat_dev = to_platform_device(dev);
char buffer[50];
int length;
seq_puts(seq, "sensorhub\t\t: yes\n");
length = sprintf(buffer, "id\t\t: %d\n", plat_dev->id);
if (length < 49) {
buffer[length] = 0;
seq_puts(seq, buffer);
}
return 0;
}
static int rtc_sensorhub_rtc_alarm_irq_enable(struct device *dev,
unsigned int enable)
{
/* TODO : implement a real handler*/
return 0;
}
static const struct rtc_class_ops rtc_sensorhub_rtc_ops = {
.proc = rtc_sensorhub_rtc_proc,
.read_time = rtc_sensorhub_rtc_read_time,
.set_time = rtc_sensorhub_rtc_set_time,
.read_alarm = rtc_sensorhub_rtc_read_alarm,
.set_alarm = rtc_sensorhub_rtc_set_alarm,
.set_mmss = rtc_sensorhub_rtc_set_mmss,
.alarm_irq_enable = rtc_sensorhub_rtc_alarm_irq_enable,
};
static ssize_t rtc_sensorhub_irq_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
/* TODO : implement a real handler*/
pr_err("%s:\n", __func__);
return sprintf(buf, "%d\n", 42);
}
static ssize_t rtc_sensorhub_irq_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
/* TODO : implement a real handler*/
pr_err("%s:\n", __func__);
return count;
}
static DEVICE_ATTR(irq, S_IRUGO | S_IWUSR, rtc_sensorhub_irq_show,
rtc_sensorhub_irq_store);
static int rtc_sensorhub_probe(struct platform_device *plat_dev)
{
int err;
struct rtc_device *rtc;
rtc = devm_rtc_device_register(&plat_dev->dev, "rtc_sensorhub",
&rtc_sensorhub_rtc_ops, THIS_MODULE);
if (IS_ERR(rtc)) {
err = PTR_ERR(rtc);
return err;
}
err = device_create_file(&plat_dev->dev, &dev_attr_irq);
if (err)
goto err;
platform_set_drvdata(plat_dev, rtc);
return 0;
err:
return err;
}
static int rtc_sensorhub_remove(struct platform_device *plat_dev)
{
device_remove_file(&plat_dev->dev, &dev_attr_irq);
return 0;
}
static const struct of_device_id of_rtc_sensorhub_match[] = {
{ .compatible = "mot,rtc_from_sensorhub", },
{},
};
static struct platform_driver rtc_sensorhub_driver = {
.probe = rtc_sensorhub_probe,
.remove = rtc_sensorhub_remove,
.driver = {
.name = "rtc-sensorhub",
.owner = THIS_MODULE,
.of_match_table = of_rtc_sensorhub_match,
},
};
module_platform_driver(rtc_sensorhub_driver);
MODULE_AUTHOR("Motorola Mobility LLC");
MODULE_DESCRIPTION("SensorHub RTC driver/device");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:rtc_sensorhub");
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