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rtc: generic: allow building on all architectures

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There 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>
This commit is contained in:
Arnd Bergmann 2016-03-01 17:59:57 +01:00 committed by Alexandre Belloni
parent ede44c908d
commit 64232fc33a
1 changed files with 11 additions and 1 deletions
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12
drivers/rtc/rtc-generic.c
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@ -9,6 +9,8 @@
#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)
@ -33,13 +35,21 @@ 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",
&generic_rtc_ops, THIS_MODULE);
ops, THIS_MODULE);
if (IS_ERR(rtc))
return PTR_ERR(rtc);