#include "entry.h"
DEFINE_SPINLOCK(rtc_lock);
-static void __iomem *bq4802_regs;
-
-static int set_rtc_mmss(unsigned long);
#define TICK_PRIV_BIT (1UL << 63)
#define TICKCMP_IRQ_BIT (1UL << 63)
if (rtc)
return rtc_set_mmss(rtc, now.tv_sec);
- return set_rtc_mmss(now.tv_sec);
-}
-
-/* Probe for the real time clock chip. */
-static void __init set_system_time(void)
-{
- unsigned int year, mon, day, hour, min, sec;
- void __iomem *bregs = bq4802_regs;
- unsigned char val = readb(bregs + 0x0e);
- unsigned int century;
-
- if (!bregs) {
- prom_printf("Something wrong, clock regs not mapped yet.\n");
- prom_halt();
- }
-
- /* BQ4802 RTC chip. */
-
- writeb(val | 0x08, bregs + 0x0e);
-
- sec = readb(bregs + 0x00);
- min = readb(bregs + 0x02);
- hour = readb(bregs + 0x04);
- day = readb(bregs + 0x06);
- mon = readb(bregs + 0x09);
- year = readb(bregs + 0x0a);
- century = readb(bregs + 0x0f);
-
- writeb(val, bregs + 0x0e);
-
- BCD_TO_BIN(sec);
- BCD_TO_BIN(min);
- BCD_TO_BIN(hour);
- BCD_TO_BIN(day);
- BCD_TO_BIN(mon);
- BCD_TO_BIN(year);
- BCD_TO_BIN(century);
-
- year += (century * 100);
-
- xtime.tv_sec = mktime(year, mon, day, hour, min, sec);
- xtime.tv_nsec = (INITIAL_JIFFIES % HZ) * (NSEC_PER_SEC / HZ);
- set_normalized_timespec(&wall_to_monotonic,
- -xtime.tv_sec, -xtime.tv_nsec);
+ return -1;
}
/* davem suggests we keep this within the 4M locked kernel image */
},
};
+static struct platform_device rtc_bq4802_device = {
+ .name = "rtc-bq4802",
+ .id = -1,
+ .num_resources = 1,
+};
+
static int __devinit bq4802_probe(struct of_device *op, const struct of_device_id *match)
{
- struct device_node *dp = op->node;
- unsigned long flags;
-
- bq4802_regs = of_ioremap(&op->resource[0], 0, resource_size(&op->resource[0]), "bq4802");
- if (!bq4802_regs)
- return -ENOMEM;
-
- printk(KERN_INFO "%s: Clock regs at %p\n", dp->full_name, bq4802_regs);
- local_irq_save(flags);
-
- set_system_time();
-
- local_irq_restore(flags);
+ printk(KERN_INFO "%s: BQ4802 regs at 0x%lx\n",
+ op->node->full_name, op->resource[0].start);
- return 0;
+ rtc_bq4802_device.resource = &op->resource[0];
+ return platform_device_register(&rtc_bq4802_device);
}
static struct of_device_id bq4802_match[] = {
>> SPARC64_NSEC_PER_CYC_SHIFT;
}
-static int set_rtc_mmss(unsigned long nowtime)
-{
- int real_seconds, real_minutes, chip_minutes;
- void __iomem *bregs = bq4802_regs;
- unsigned long flags;
- unsigned char val;
- int retval = 0;
-
- /*
- * Not having a register set can lead to trouble.
- * Also starfire doesn't have a tod clock.
- */
- if (!bregs)
- return -1;
-
- spin_lock_irqsave(&rtc_lock, flags);
-
- val = readb(bregs + 0x0e);
-
- /* BQ4802 RTC chip. */
-
- writeb(val | 0x08, bregs + 0x0e);
-
- chip_minutes = readb(bregs + 0x02);
- BCD_TO_BIN(chip_minutes);
- real_seconds = nowtime % 60;
- real_minutes = nowtime / 60;
- if (((abs(real_minutes - chip_minutes) + 15)/30) & 1)
- real_minutes += 30;
- real_minutes %= 60;
-
- if (abs(real_minutes - chip_minutes) < 30) {
- BIN_TO_BCD(real_seconds);
- BIN_TO_BCD(real_minutes);
- writeb(real_seconds, bregs + 0x00);
- writeb(real_minutes, bregs + 0x02);
- } else {
- printk(KERN_WARNING
- "set_rtc_mmss: can't update from %d to %d\n",
- chip_minutes, real_minutes);
- retval = -1;
- }
-
- writeb(val, bregs + 0x0e);
-
- spin_unlock_irqrestore(&rtc_lock, flags);
-
- return retval;
-}
-
#define RTC_IS_OPEN 0x01 /* means /dev/rtc is in use */
static unsigned char mini_rtc_status; /* bitmapped status byte. */
return hypervisor_set_time(seconds);
}
-static void bq4802_get_rtc_time(struct rtc_time *time)
-{
- unsigned char val = readb(bq4802_regs + 0x0e);
- unsigned int century;
-
- writeb(val | 0x08, bq4802_regs + 0x0e);
-
- time->tm_sec = readb(bq4802_regs + 0x00);
- time->tm_min = readb(bq4802_regs + 0x02);
- time->tm_hour = readb(bq4802_regs + 0x04);
- time->tm_mday = readb(bq4802_regs + 0x06);
- time->tm_mon = readb(bq4802_regs + 0x09);
- time->tm_year = readb(bq4802_regs + 0x0a);
- time->tm_wday = readb(bq4802_regs + 0x08);
- century = readb(bq4802_regs + 0x0f);
-
- writeb(val, bq4802_regs + 0x0e);
-
- BCD_TO_BIN(time->tm_sec);
- BCD_TO_BIN(time->tm_min);
- BCD_TO_BIN(time->tm_hour);
- BCD_TO_BIN(time->tm_mday);
- BCD_TO_BIN(time->tm_mon);
- BCD_TO_BIN(time->tm_year);
- BCD_TO_BIN(time->tm_wday);
- BCD_TO_BIN(century);
-
- time->tm_year += (century * 100);
- time->tm_year -= 1900;
-
- time->tm_mon--;
-}
-
-static int bq4802_set_rtc_time(struct rtc_time *time)
-{
- unsigned char val = readb(bq4802_regs + 0x0e);
- unsigned char sec, min, hrs, day, mon, yrs, century;
- unsigned int year;
-
- year = time->tm_year + 1900;
- century = year / 100;
- yrs = year % 100;
-
- mon = time->tm_mon + 1; /* tm_mon starts at zero */
- day = time->tm_mday;
- hrs = time->tm_hour;
- min = time->tm_min;
- sec = time->tm_sec;
-
- BIN_TO_BCD(sec);
- BIN_TO_BCD(min);
- BIN_TO_BCD(hrs);
- BIN_TO_BCD(day);
- BIN_TO_BCD(mon);
- BIN_TO_BCD(yrs);
- BIN_TO_BCD(century);
-
- writeb(val | 0x08, bq4802_regs + 0x0e);
-
- writeb(sec, bq4802_regs + 0x00);
- writeb(min, bq4802_regs + 0x02);
- writeb(hrs, bq4802_regs + 0x04);
- writeb(day, bq4802_regs + 0x06);
- writeb(mon, bq4802_regs + 0x09);
- writeb(yrs, bq4802_regs + 0x0a);
- writeb(century, bq4802_regs + 0x0f);
-
- writeb(val, bq4802_regs + 0x0e);
-
- return 0;
-}
-
struct mini_rtc_ops {
void (*get_rtc_time)(struct rtc_time *);
int (*set_rtc_time)(struct rtc_time *);
.set_rtc_time = hypervisor_set_rtc_time,
};
-static struct mini_rtc_ops bq4802_rtc_ops = {
- .get_rtc_time = bq4802_get_rtc_time,
- .set_rtc_time = bq4802_set_rtc_time,
-};
-
static struct mini_rtc_ops *mini_rtc_ops;
static inline void mini_get_rtc_time(struct rtc_time *time)
mini_rtc_ops = &hypervisor_rtc_ops;
else if (this_is_starfire)
mini_rtc_ops = &starfire_rtc_ops;
- else if (bq4802_regs)
- mini_rtc_ops = &bq4802_rtc_ops;
else
return -ENODEV;
projects / linux-2.6-omap-h63xx.git / commitdiff