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rtc: ia64: allow other architectures to use EFI RTC

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Currently, the rtc-efi driver is restricted to ia64 only.  Newer
architectures with EFI support may want to also use that driver.  This
patch moves the platform device setup from ia64 into drivers/rtc and
allow any architecture with CONFIG_EFI=y to use the rtc-efi driver.

Signed-off-by: Mark Salter <msalter@redhat.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Mark Salter 2014-08-08 14:20:14 -07:00 committed by Linus Torvalds
parent ca6dc2dab9
commit da167ad763
4 changed files with 36 additions and 16 deletions
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15
arch/ia64/kernel/time.c
View file

@ -384,21 +384,6 @@ static struct irqaction timer_irqaction = {
.name = "timer"
};
static struct platform_device rtc_efi_dev = {
.name = "rtc-efi",
.id = -1,
};
static int __init rtc_init(void)
{
if (platform_device_register(&rtc_efi_dev) < 0)
printk(KERN_ERR "unable to register rtc device...\n");
/* not necessarily an error */
return 0;
}
module_init(rtc_init);
void read_persistent_clock(struct timespec *ts)
{
efi_gettimeofday(ts);

2
drivers/rtc/Kconfig
View file

@ -798,7 +798,7 @@ config RTC_DRV_DA9063
config RTC_DRV_EFI
tristate "EFI RTC"
depends on IA64
depends on EFI
help
If you say yes here you will get support for the EFI
Real Time Clock.

4
drivers/rtc/Makefile
View file

@ -10,6 +10,10 @@ obj-$(CONFIG_RTC_SYSTOHC) += systohc.o
obj-$(CONFIG_RTC_CLASS) += rtc-core.o
rtc-core-y := class.o interface.o
ifdef CONFIG_RTC_DRV_EFI
rtc-core-y += rtc-efi-platform.o
endif
rtc-core-$(CONFIG_RTC_INTF_DEV) += rtc-dev.o
rtc-core-$(CONFIG_RTC_INTF_PROC) += rtc-proc.o
rtc-core-$(CONFIG_RTC_INTF_SYSFS) += rtc-sysfs.o

31
drivers/rtc/rtc-efi-platform.c Normal file
View file

@ -0,0 +1,31 @@
/*
* Moved from arch/ia64/kernel/time.c
*
* Copyright (C) 1998-2003 Hewlett-Packard Co
* Stephane Eranian <eranian@hpl.hp.com>
* David Mosberger <davidm@hpl.hp.com>
* Copyright (C) 1999 Don Dugger <don.dugger@intel.com>
* Copyright (C) 1999-2000 VA Linux Systems
* Copyright (C) 1999-2000 Walt Drummond <drummond@valinux.com>
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/efi.h>
#include <linux/platform_device.h>
static struct platform_device rtc_efi_dev = {
.name = "rtc-efi",
.id = -1,
};
static int __init rtc_init(void)
{
if (efi_enabled(EFI_RUNTIME_SERVICES))
if (platform_device_register(&rtc_efi_dev) < 0)
pr_err("unable to register rtc device...\n");
/* not necessarily an error */
return 0;
}
module_init(rtc_init);