/*
* 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/module.h>
#include <linux/mc146818rtc.h>
#include <linux/of_address.h>
static int __init add_rtc(void )
{
struct device_node *np;
struct platform_device *pd;
struct resource res[2 ];
unsigned int num_res = 1 ;
int ret;
memset(&res, 0 , sizeof (res));
np = of_find_compatible_node(NULL, NULL, "pnpPNP,b00" );
if (!np)
return -ENODEV;
ret = of_address_to_resource(np, 0 , &res[0 ]);
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[0 ].start != RTC_PORT(0 ))
return -EINVAL;
np = of_find_compatible_node(NULL, NULL, "chrp,iic" );
if (!np)
np = of_find_compatible_node(NULL, NULL, "pnpPNP,000" );
if (np) {
of_node_put(np);
/*
* Use a fixed interrupt value of 8 since on PPC if we are
* using this its off an i8259 which we ensure has interrupt
* numbers 0 . . 15 .
*/
res[1 ].start = 8 ;
res[1 ].end = 8 ;
res[1 ].flags = IORESOURCE_IRQ;
num_res++;
}
pd = platform_device_register_simple("rtc_cmos" , -1 ,
&res[0 ], num_res);
return PTR_ERR_OR_ZERO(pd);
}
fs_initcall(add_rtc);
MODULE_DESCRIPTION("PPC RTC CMOS driver" );
MODULE_LICENSE("GPL" );
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