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 Diff line number Diff line
@@ -534,4 +534,12 @@ config RTC_DRV_RS5C313 
	help

	  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

drivers/rtc/Makefile

+1 −0
Original line number 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_VR41XX)	+= rtc-vr41xx.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 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");

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