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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" .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) void read_persistent_clock(struct timespec *ts)
{ {
efi_gettimeofday(ts); efi_gettimeofday(ts);

2
drivers/rtc/Kconfig
View File

@ -798,7 +798,7 @@ config RTC_DRV_DA9063
config RTC_DRV_EFI config RTC_DRV_EFI
tristate "EFI RTC" tristate "EFI RTC"
depends on IA64 depends on EFI
help help
If you say yes here you will get support for the EFI If you say yes here you will get support for the EFI
Real Time Clock. 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 obj-$(CONFIG_RTC_CLASS) += rtc-core.o
rtc-core-y := class.o interface.o rtc-core-y := class.o interface.o
ifdef CONFIG_RTC_DRV_EFI
rtc-core-y += rtc-efi-platform.o
endif
rtc-core-$(CONFIG_RTC_INTF_DEV) += rtc-dev.o rtc-core-$(CONFIG_RTC_INTF_DEV) += rtc-dev.o
rtc-core-$(CONFIG_RTC_INTF_PROC) += rtc-proc.o rtc-core-$(CONFIG_RTC_INTF_PROC) += rtc-proc.o
rtc-core-$(CONFIG_RTC_INTF_SYSFS) += rtc-sysfs.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);