Select Git revision
rtc-generic.c
-
Arnd Bergmann authoredThere are four architectures using this driver, but since we can build it with COMPILE_TEST, we should try dealing with the absence of the asm/rtc.h header file, to avoid getting a build error: drivers/rtc/rtc-generic.c:12:21: fatal error: asm/rtc.h: No such file or directory This creates an alternative use of the driver, allowing architectures to pass a set of rtc_class_ops in platform data. We can convert the four architectures to use this and then remove the original code. Signed-off-by:
Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>Arnd Bergmann authoredThere are four architectures using this driver, but since we can build it with COMPILE_TEST, we should try dealing with the absence of the asm/rtc.h header file, to avoid getting a build error: drivers/rtc/rtc-generic.c:12:21: fatal error: asm/rtc.h: No such file or directory This creates an alternative use of the driver, allowing architectures to pass a set of rtc_class_ops in platform data. We can convert the four architectures to use this and then remove the original code. Signed-off-by:
Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
rtc-generic.c 1.56 KiB
/* rtc-generic: RTC driver using the generic RTC abstraction
*
* Copyright (C) 2008 Kyle McMartin <kyle@mcmartin.ca>
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/time.h>
#include <linux/platform_device.h>
#include <linux/rtc.h>
#if defined(CONFIG_M68K) || defined(CONFIG_PARISC) || \
defined(CONFIG_PPC) || defined(CONFIG_SUPERH32)
#include <asm/rtc.h>
static int generic_get_time(struct device *dev, struct rtc_time *tm)
{
unsigned int ret = get_rtc_time(tm);
if (ret & RTC_BATT_BAD)
return -EOPNOTSUPP;
return rtc_valid_tm(tm);
}
static int generic_set_time(struct device *dev, struct rtc_time *tm)
{
if (set_rtc_time(tm) < 0)
return -EOPNOTSUPP;
return 0;
}
static const struct rtc_class_ops generic_rtc_ops = {
.read_time = generic_get_time,
.set_time = generic_set_time,
};
#else
#define generic_rtc_ops *(struct rtc_class_ops*)NULL
#endif
static int __init generic_rtc_probe(struct platform_device *dev)
{
struct rtc_device *rtc;
const struct rtc_class_ops *ops;
ops = dev_get_platdata(&dev->dev);
if (!ops)
ops = &generic_rtc_ops;
rtc = devm_rtc_device_register(&dev->dev, "rtc-generic",
ops, THIS_MODULE);
if (IS_ERR(rtc))
return PTR_ERR(rtc);
platform_set_drvdata(dev, rtc);
return 0;
}
static struct platform_driver generic_rtc_driver = {
.driver = {
.name = "rtc-generic",
},
};
module_platform_driver_probe(generic_rtc_driver, generic_rtc_probe);
MODULE_AUTHOR("Kyle McMartin <kyle@mcmartin.ca>");
MODULE_LICENSE("GPL");MODULE_DESCRIPTION("Generic RTC driver");
MODULE_ALIAS("platform:rtc-generic");