Commit aabe1885 authored by David Woodhouse's avatar David Woodhouse Committed by Linus Torvalds
Browse files

rtc: class driver for ppc_md RTC functions 



This hooks up the platform-specific [gs]et_rtc_time functions so that
kernels using CONFIG_RTC_CLASS have RTC support on most PowerPC platforms.

A new driver, and one which we've been shipping in Fedora for a while
already, since otherwise RTC support breaks.

[akpm@linux-foundation.org: fix Kconfig indenting]
Signed-off-by: default avatarDavid Woodhouse <dwmw2@infradead.org>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
Acked-by: default avatarAlessandro Zummo <a.zummo@towertech.it>
Acked-by: default avatarDavid Brownell <david-b@pacbell.net>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent ec0ced15

drivers/rtc/Kconfig

+8 −0
Original line number Original line Diff line number Diff line
@@ -534,4 +534,12 @@ config RTC_DRV_RS5C313 
	help

	help

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

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





config RTC_DRV_PPC

       tristate "PowerPC machine dependent RTC support"

       depends on PPC_MERGE

       help

	 The PowerPC kernel has machine-specific functions for accessing

	 the RTC. This exposes that functionality through the generic RTC

	 class.



endif # RTC_CLASS
 
endif # RTC_CLASS

drivers/rtc/Makefile

+1 −0
Original line number Original line Diff line number Diff line
@@ -54,3 +54,4 @@ obj-$(CONFIG_RTC_DRV_TEST) += rtc-test.o 
obj-$(CONFIG_RTC_DRV_V3020)	+= rtc-v3020.o

obj-$(CONFIG_RTC_DRV_V3020)	+= rtc-v3020.o

obj-$(CONFIG_RTC_DRV_VR41XX)	+= rtc-vr41xx.o

obj-$(CONFIG_RTC_DRV_VR41XX)	+= rtc-vr41xx.o

obj-$(CONFIG_RTC_DRV_X1205)	+= rtc-x1205.o

obj-$(CONFIG_RTC_DRV_X1205)	+= rtc-x1205.o

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

drivers/rtc/rtc-ppc.c

0 → 100644
+69 −0
Original line number Original line Diff line number Diff line 
/*

 * RTC driver for ppc_md RTC functions

 *

 * © 2007 Red Hat, Inc.

 *

 * Author: David Woodhouse <dwmw2@infradead.org>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 */





#include <linux/module.h>

#include <linux/err.h>

#include <linux/rtc.h>

#include <linux/platform_device.h>

#include <asm/machdep.h>



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

{

	ppc_md.get_rtc_time(tm);

	return 0;

}



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

{

	return ppc_md.set_rtc_time(tm);

}



static const struct rtc_class_ops ppc_rtc_ops = {

	.set_time = ppc_rtc_set_time,

	.read_time = ppc_rtc_read_time,

};



static struct rtc_device *rtc;

static struct platform_device *ppc_rtc_pdev;



static int __init ppc_rtc_init(void)

{

	if (!ppc_md.get_rtc_time || !ppc_md.set_rtc_time)

		return -ENODEV;



	ppc_rtc_pdev = platform_device_register_simple("ppc-rtc", 0, NULL, 0);

	if (IS_ERR(ppc_rtc_pdev))

		return PTR_ERR(ppc_rtc_pdev);



	rtc = rtc_device_register("ppc_md", &ppc_rtc_pdev->dev,

				  &ppc_rtc_ops, THIS_MODULE);

	if (IS_ERR(rtc)) {

		platform_device_unregister(ppc_rtc_pdev);

		return PTR_ERR(rtc);

	}



	return 0;

}



static void __exit ppc_rtc_exit(void)

{

	rtc_device_unregister(rtc);

	platform_device_unregister(ppc_rtc_pdev);

}



module_init(ppc_rtc_init);

module_exit(ppc_rtc_exit);



MODULE_LICENSE("GPL");

MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");

MODULE_DESCRIPTION("Generic RTC class driver for PowerPC");