ad28a07bca
Since 43cc71eed1, the platform modalias is
prefixed with "platform:". Add MODULE_ALIAS() to the hotpluggable RTC
platform drivers, to re-enable module auto loading.
[dbrownell@users.sourceforge.net: more drivers, minor fix]
Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Cc: Greg KH <greg@kroah.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
164 lines
3.7 KiB
C
164 lines
3.7 KiB
C
/*
|
|
* A driver for the RTC embedded in the Cirrus Logic EP93XX processors
|
|
* Copyright (c) 2006 Tower Technologies
|
|
*
|
|
* Author: Alessandro Zummo <a.zummo@towertech.it>
|
|
*
|
|
* 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/rtc.h>
|
|
#include <linux/platform_device.h>
|
|
#include <asm/hardware.h>
|
|
|
|
#define EP93XX_RTC_REG(x) (EP93XX_RTC_BASE + (x))
|
|
#define EP93XX_RTC_DATA EP93XX_RTC_REG(0x0000)
|
|
#define EP93XX_RTC_LOAD EP93XX_RTC_REG(0x000C)
|
|
#define EP93XX_RTC_SWCOMP EP93XX_RTC_REG(0x0108)
|
|
|
|
#define DRV_VERSION "0.2"
|
|
|
|
static int ep93xx_get_swcomp(struct device *dev, unsigned short *preload,
|
|
unsigned short *delete)
|
|
{
|
|
unsigned short comp = __raw_readl(EP93XX_RTC_SWCOMP);
|
|
|
|
if (preload)
|
|
*preload = comp & 0xffff;
|
|
|
|
if (delete)
|
|
*delete = (comp >> 16) & 0x1f;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ep93xx_rtc_read_time(struct device *dev, struct rtc_time *tm)
|
|
{
|
|
unsigned long time = __raw_readl(EP93XX_RTC_DATA);
|
|
|
|
rtc_time_to_tm(time, tm);
|
|
return 0;
|
|
}
|
|
|
|
static int ep93xx_rtc_set_mmss(struct device *dev, unsigned long secs)
|
|
{
|
|
__raw_writel(secs + 1, EP93XX_RTC_LOAD);
|
|
return 0;
|
|
}
|
|
|
|
static int ep93xx_rtc_set_time(struct device *dev, struct rtc_time *tm)
|
|
{
|
|
int err;
|
|
unsigned long secs;
|
|
|
|
err = rtc_tm_to_time(tm, &secs);
|
|
if (err != 0)
|
|
return err;
|
|
|
|
return ep93xx_rtc_set_mmss(dev, secs);
|
|
}
|
|
|
|
static int ep93xx_rtc_proc(struct device *dev, struct seq_file *seq)
|
|
{
|
|
unsigned short preload, delete;
|
|
|
|
ep93xx_get_swcomp(dev, &preload, &delete);
|
|
|
|
seq_printf(seq, "preload\t\t: %d\n", preload);
|
|
seq_printf(seq, "delete\t\t: %d\n", delete);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct rtc_class_ops ep93xx_rtc_ops = {
|
|
.read_time = ep93xx_rtc_read_time,
|
|
.set_time = ep93xx_rtc_set_time,
|
|
.set_mmss = ep93xx_rtc_set_mmss,
|
|
.proc = ep93xx_rtc_proc,
|
|
};
|
|
|
|
static ssize_t ep93xx_sysfs_show_comp_preload(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
unsigned short preload;
|
|
|
|
ep93xx_get_swcomp(dev, &preload, NULL);
|
|
|
|
return sprintf(buf, "%d\n", preload);
|
|
}
|
|
static DEVICE_ATTR(comp_preload, S_IRUGO, ep93xx_sysfs_show_comp_preload, NULL);
|
|
|
|
static ssize_t ep93xx_sysfs_show_comp_delete(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
unsigned short delete;
|
|
|
|
ep93xx_get_swcomp(dev, NULL, &delete);
|
|
|
|
return sprintf(buf, "%d\n", delete);
|
|
}
|
|
static DEVICE_ATTR(comp_delete, S_IRUGO, ep93xx_sysfs_show_comp_delete, NULL);
|
|
|
|
|
|
static int __devinit ep93xx_rtc_probe(struct platform_device *dev)
|
|
{
|
|
struct rtc_device *rtc = rtc_device_register("ep93xx",
|
|
&dev->dev, &ep93xx_rtc_ops, THIS_MODULE);
|
|
|
|
if (IS_ERR(rtc)) {
|
|
return PTR_ERR(rtc);
|
|
}
|
|
|
|
platform_set_drvdata(dev, rtc);
|
|
|
|
device_create_file(&dev->dev, &dev_attr_comp_preload);
|
|
device_create_file(&dev->dev, &dev_attr_comp_delete);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __devexit ep93xx_rtc_remove(struct platform_device *dev)
|
|
{
|
|
struct rtc_device *rtc = platform_get_drvdata(dev);
|
|
|
|
if (rtc)
|
|
rtc_device_unregister(rtc);
|
|
|
|
platform_set_drvdata(dev, NULL);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* work with hotplug and coldplug */
|
|
MODULE_ALIAS("platform:ep93xx-rtc");
|
|
|
|
static struct platform_driver ep93xx_rtc_platform_driver = {
|
|
.driver = {
|
|
.name = "ep93xx-rtc",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
.probe = ep93xx_rtc_probe,
|
|
.remove = __devexit_p(ep93xx_rtc_remove),
|
|
};
|
|
|
|
static int __init ep93xx_rtc_init(void)
|
|
{
|
|
return platform_driver_register(&ep93xx_rtc_platform_driver);
|
|
}
|
|
|
|
static void __exit ep93xx_rtc_exit(void)
|
|
{
|
|
platform_driver_unregister(&ep93xx_rtc_platform_driver);
|
|
}
|
|
|
|
MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>");
|
|
MODULE_DESCRIPTION("EP93XX RTC driver");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_VERSION(DRV_VERSION);
|
|
|
|
module_init(ep93xx_rtc_init);
|
|
module_exit(ep93xx_rtc_exit);
|