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Commit 93ab4718 authored by Wade Farnsworth's avatar Wade Farnsworth Committed by Paul Mackerras
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[POWERPC] Create add_rtc() function to enable the RTC CMOS driver 



In order to use the RTC CMOS driver, each architecture must register a
platform device for the RTC.

This creates a function to register the platform device based on the RTC
device node and verifies that the RTC port against the hard-coded value
in asm/mc146818rtc.h.

Signed-off-by: default avatarWade Farnsworth <wfarnsworth@mvista.com>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
parent 3c0c9e38

arch/powerpc/sysdev/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -16,6 +16,7 @@ obj-$(CONFIG_TSI108_BRIDGE) += tsi108_pci.o tsi108_dev.o 
obj-$(CONFIG_QUICC_ENGINE)	+= qe_lib/

mv64x60-$(CONFIG_PCI)		+= mv64x60_pci.o

obj-$(CONFIG_MV64X60)		+= $(mv64x60-y) mv64x60_pic.o mv64x60_dev.o

obj-$(CONFIG_RTC_DRV_CMOS)	+= rtc_cmos_setup.o



# contains only the suspend handler for time

ifeq ($(CONFIG_RTC_CLASS),)

arch/powerpc/sysdev/rtc_cmos_setup.c

0 → 100644
+49 −0
Original line number Diff line number Diff line 
/*

 * Setup code for PC-style Real-Time Clock.

 *

 * Author: Wade Farnsworth <wfarnsworth@mvista.com>

 *

 * 2007 (c) MontaVista Software, Inc. This file is licensed under

 * the terms of the GNU General Public License version 2. This program

 * is licensed "as is" without any warranty of any kind, whether express

 * or implied.

 */



#include <linux/platform_device.h>

#include <linux/err.h>

#include <linux/init.h>

#include <linux/mc146818rtc.h>



#include <asm/prom.h>



static int  __init add_rtc(void)

{

	struct device_node *np;

	struct platform_device *pd;

	struct resource res;

	int ret;



	np = of_find_compatible_node(NULL, NULL, "pnpPNP,b00");

	if (!np)

		return -ENODEV;



	ret = of_address_to_resource(np, 0, &res);

	of_node_put(np);

	if (ret)

		return ret;



	/*

	 * RTC_PORT(x) is hardcoded in asm/mc146818rtc.h.  Verify that the

	 * address provided by the device node matches.

	 */

	if (res.start != RTC_PORT(0))

		return -EINVAL;



	pd = platform_device_register_simple("rtc_cmos", -1,

					     &res, 1);

	if (IS_ERR(pd))

		return PTR_ERR(pd);



	return 0;

}

fs_initcall(add_rtc);