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MIPS: IP27: Switch over to RTC class driver 

This patchset removes some dead code and creates a platform device
for the RTC class driver.

Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Thomas Bogendoerfer 2008-10-14 17:17:28 +02:00 committed by Ralf Baechle
parent 5f119f2906
commit 3ec066cdb7
1 changed files with 22 additions and 77 deletions
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99
arch/mips/sgi-ip27/ip27-timer.c
View File

@ -13,12 +13,12 @@
#include <linux/time.h>
#include <linux/timex.h>
#include <linux/mm.h>
#include <linux/platform_device.h>
#include <asm/time.h>
#include <asm/pgtable.h>
#include <asm/sgialib.h>
#include <asm/sn/ioc3.h>
#include <asm/m48t35.h>
#include <asm/sn/klconfig.h>
#include <asm/sn/arch.h>
#include <asm/sn/addrs.h>
@ -28,51 +28,6 @@
#define TICK_SIZE (tick_nsec / 1000)
#if 0
static int set_rtc_mmss(unsigned long nowtime)
{
int retval = 0;
int real_seconds, real_minutes, cmos_minutes;
struct m48t35_rtc *rtc;
nasid_t nid;
nid = get_nasid();
rtc = (struct m48t35_rtc *)(KL_CONFIG_CH_CONS_INFO(nid)->memory_base +
IOC3_BYTEBUS_DEV0);
rtc->control |= M48T35_RTC_READ;
cmos_minutes = BCD2BIN(rtc->min);
rtc->control &= ~M48T35_RTC_READ;
/*
* Since we're only adjusting minutes and seconds, don't interfere with
* hour overflow. This avoids messing with unknown time zones but
* requires your RTC not to be off by more than 15 minutes
*/
real_seconds = nowtime % 60;
real_minutes = nowtime / 60;
if (((abs(real_minutes - cmos_minutes) + 15)/30) & 1)
real_minutes += 30; /* correct for half hour time zone */
real_minutes %= 60;
if (abs(real_minutes - cmos_minutes) < 30) {
real_seconds = BIN2BCD(real_seconds);
real_minutes = BIN2BCD(real_minutes);
rtc->control |= M48T35_RTC_SET;
rtc->sec = real_seconds;
rtc->min = real_minutes;
rtc->control &= ~M48T35_RTC_SET;
} else {
printk(KERN_WARNING
"set_rtc_mmss: can't update from %d to %d\n",
cmos_minutes, real_minutes);
retval = -1;
}
return retval;
}
#endif
/* Includes for ioc3_init(). */
#include <asm/sn/types.h>
#include <asm/sn/sn0/addrs.h>
@ -80,37 +35,6 @@ static int set_rtc_mmss(unsigned long nowtime)
#include <asm/sn/sn0/hubio.h>
#include <asm/pci/bridge.h>
unsigned long read_persistent_clock(void)
{
unsigned int year, month, date, hour, min, sec;
struct m48t35_rtc *rtc;
nasid_t nid;
nid = get_nasid();
rtc = (struct m48t35_rtc *)(KL_CONFIG_CH_CONS_INFO(nid)->memory_base +
IOC3_BYTEBUS_DEV0);
rtc->control |= M48T35_RTC_READ;
sec = rtc->sec;
min = rtc->min;
hour = rtc->hour;
date = rtc->date;
month = rtc->month;
year = rtc->year;
rtc->control &= ~M48T35_RTC_READ;
sec = BCD2BIN(sec);
min = BCD2BIN(min);
hour = BCD2BIN(hour);
date = BCD2BIN(date);
month = BCD2BIN(month);
year = BCD2BIN(year);
year += 1970;
return mktime(year, month, date, hour, min, sec);
}
static void enable_rt_irq(unsigned int irq)
{
}
@ -286,6 +210,7 @@ void __cpuinit cpu_time_init(void)
void __cpuinit hub_rtc_init(cnodeid_t cnode)
{
/*
* We only need to initialize the current node.
* If this is not the current node then it is a cpuless
@ -301,3 +226,23 @@ void __cpuinit hub_rtc_init(cnodeid_t cnode)
LOCAL_HUB_S(PI_RT_PEND_B, 0);
}
}
static int __init sgi_ip27_rtc_devinit(void)
{
struct resource res;
memset(&res, 0, sizeof(res));
res.start = XPHYSADDR(KL_CONFIG_CH_CONS_INFO(master_nasid)->memory_base +
IOC3_BYTEBUS_DEV0);
res.end = res.start + 32767;
res.flags = IORESOURCE_MEM;
return IS_ERR(platform_device_register_simple("rtc-m48t35", -1,
&res, 1));
}
/*
* kludge make this a device_initcall after ioc3 resource conflicts
* are resolved
*/
late_initcall(sgi_ip27_rtc_devinit);