Commit 9eb16864 authored by Kyle McMartin's avatar Kyle McMartin Committed by Kyle McMartin
Browse files

parisc: add rtc platform driver 



Signed-off-by: default avatarKyle McMartin <kyle@mcmartin.ca>
parent f0514ae3

arch/parisc/Kconfig

+2 −0
Original line number Diff line number Diff line
@@ -9,6 +9,8 @@ config PARISC 
	def_bool y

	select HAVE_IDE

	select HAVE_OPROFILE

	select RTC_CLASS

	select RTC_DRV_PARISC

	help

	  The PA-RISC microprocessor is designed by Hewlett-Packard and used

	  in many of their workstations & servers (HP9000 700 and 800 series,

arch/parisc/kernel/time.c

+19 −1
Original line number Diff line number Diff line
@@ -23,6 +23,7 @@ 
#include <linux/smp.h>

#include <linux/profile.h>

#include <linux/clocksource.h>

#include <linux/platform_device.h>



#include <asm/uaccess.h>

#include <asm/io.h>
@@ -215,6 +216,24 @@ void __init start_cpu_itimer(void) 
	cpu_data[cpu].it_value = next_tick;

}



struct platform_device rtc_parisc_dev = {

	.name = "rtc-parisc",

	.id = -1,

};



static int __init rtc_init(void)

{

	int ret;



	ret = platform_device_register(&rtc_parisc_dev);

	if (ret < 0)

		printk(KERN_ERR "unable to register rtc device...\n");



	/* not necessarily an error */

	return 0;

}

module_init(rtc_init);



void __init time_init(void)

{

	static struct pdc_tod tod_data;
@@ -245,4 +264,3 @@ void __init time_init(void) 
		xtime.tv_nsec = 0;

	}

}

drivers/rtc/Kconfig

+8 −0
Original line number Diff line number Diff line
@@ -575,6 +575,14 @@ config RTC_DRV_RS5C313 
	help

	  If you say yes here you get support for the Ricoh RS5C313 RTC chips.



config RTC_DRV_PARISC

	tristate "PA-RISC firmware RTC support"

	depends on PARISC

	help

	  Say Y or M here to enable RTC support on PA-RISC systems using

	  firmware calls. If you do not know what you are doing, you should

	  just say Y.



config RTC_DRV_PPC

       tristate "PowerPC machine dependent RTC support"

       depends on PPC_MERGE

drivers/rtc/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -45,6 +45,7 @@ obj-$(CONFIG_RTC_DRV_PCF8563) += rtc-pcf8563.o 
obj-$(CONFIG_RTC_DRV_PCF8583)	+= rtc-pcf8583.o

obj-$(CONFIG_RTC_DRV_PL030)	+= rtc-pl030.o

obj-$(CONFIG_RTC_DRV_PL031)	+= rtc-pl031.o

obj-$(CONFIG_RTC_DRV_PARISC)	+= rtc-parisc.o

obj-$(CONFIG_RTC_DRV_PPC)	+= rtc-ppc.o

obj-$(CONFIG_RTC_DRV_R9701)	+= rtc-r9701.o

obj-$(CONFIG_RTC_DRV_RS5C313)	+= rtc-rs5c313.o

drivers/rtc/rtc-parisc.c

0 → 100644
+111 −0
Original line number Diff line number Diff line 
/* rtc-parisc: RTC for HP PA-RISC firmware

 *

 * 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 <asm/rtc.h>



/* as simple as can be, and no simpler. */

struct parisc_rtc {

	struct rtc_device *rtc;

	spinlock_t lock;

};



static int parisc_get_time(struct device *dev, struct rtc_time *tm)

{

	struct parisc_rtc *p = dev_get_drvdata(dev);

	unsigned long flags, ret;



	spin_lock_irqsave(&p->lock, flags);

	ret = get_rtc_time(tm);

	spin_unlock_irqrestore(&p->lock, flags);



	if (ret & RTC_BATT_BAD)

		return -EOPNOTSUPP;



	return 0;

}



static int parisc_set_time(struct device *dev, struct rtc_time *tm)

{

	struct parisc_rtc *p = dev_get_drvdata(dev);

	unsigned long flags, ret;



	spin_lock_irqsave(&p->lock, flags);

	ret = set_rtc_time(tm);

	spin_unlock_irqrestore(&p->lock, flags);



	if (ret < 0)

		return -EOPNOTSUPP;



	return 0;

}



static const struct rtc_class_ops parisc_rtc_ops = {

	.read_time = parisc_get_time,

	.set_time = parisc_set_time,

};



static int __devinit parisc_rtc_probe(struct platform_device *dev)

{

	struct parisc_rtc *p;



	p = kzalloc(sizeof (*p), GFP_KERNEL);

	if (!p)

		return -ENOMEM;



	spin_lock_init(&p->lock);



	p->rtc = rtc_device_register("rtc-parisc", &dev->dev, &parisc_rtc_ops,

					THIS_MODULE);

	if (IS_ERR(p->rtc)) {

		int err = PTR_ERR(p->rtc);

		kfree(p);

		return err;

	}



	platform_set_drvdata(dev, p);



	return 0;

}



static int __devexit parisc_rtc_remove(struct platform_device *dev)

{

	struct parisc_rtc *p = platform_get_drvdata(dev);



	rtc_device_unregister(p->rtc);

	kfree(p);



	return 0;

}



static struct platform_driver parisc_rtc_driver = {

	.driver = {

		.name = "rtc-parisc",

		.owner = THIS_MODULE,

	},

	.probe = parisc_rtc_probe,

	.remove = __devexit_p(parisc_rtc_remove),

};



static int __init parisc_rtc_init(void)

{

	return platform_driver_register(&parisc_rtc_driver);

}



static void __exit parisc_rtc_fini(void)

{

	platform_driver_unregister(&parisc_rtc_driver);

}



module_init(parisc_rtc_init);

module_exit(parisc_rtc_fini);



MODULE_AUTHOR("Kyle McMartin <kyle@mcmartin.ca>");

MODULE_LICENSE("GPL");

MODULE_DESCRIPTION("HP PA-RISC RTC driver");