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sparc64: Use generic BQ4802 RTC driver.
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller
parent
cca4c23102
commit
29b503f11c
@ -22,6 +22,7 @@ config SPARC64
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select RTC_CLASS
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select RTC_DRV_M48T59
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select RTC_DRV_CMOS
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select RTC_DRV_BQ4802
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config GENERIC_TIME
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bool
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@ -52,9 +52,6 @@
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#include "entry.h"
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DEFINE_SPINLOCK(rtc_lock);
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static void __iomem *bq4802_regs;
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static int set_rtc_mmss(unsigned long);
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#define TICK_PRIV_BIT (1UL << 63)
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#define TICKCMP_IRQ_BIT (1UL << 63)
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@ -403,50 +400,7 @@ int update_persistent_clock(struct timespec now)
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if (rtc)
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return rtc_set_mmss(rtc, now.tv_sec);
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return set_rtc_mmss(now.tv_sec);
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}
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/* Probe for the real time clock chip. */
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static void __init set_system_time(void)
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{
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unsigned int year, mon, day, hour, min, sec;
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void __iomem *bregs = bq4802_regs;
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unsigned char val = readb(bregs + 0x0e);
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unsigned int century;
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if (!bregs) {
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prom_printf("Something wrong, clock regs not mapped yet.\n");
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prom_halt();
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}
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/* BQ4802 RTC chip. */
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writeb(val | 0x08, bregs + 0x0e);
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sec = readb(bregs + 0x00);
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min = readb(bregs + 0x02);
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hour = readb(bregs + 0x04);
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day = readb(bregs + 0x06);
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mon = readb(bregs + 0x09);
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year = readb(bregs + 0x0a);
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century = readb(bregs + 0x0f);
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writeb(val, bregs + 0x0e);
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BCD_TO_BIN(sec);
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BCD_TO_BIN(min);
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BCD_TO_BIN(hour);
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BCD_TO_BIN(day);
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BCD_TO_BIN(mon);
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BCD_TO_BIN(year);
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BCD_TO_BIN(century);
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year += (century * 100);
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xtime.tv_sec = mktime(year, mon, day, hour, min, sec);
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xtime.tv_nsec = (INITIAL_JIFFIES % HZ) * (NSEC_PER_SEC / HZ);
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set_normalized_timespec(&wall_to_monotonic,
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-xtime.tv_sec, -xtime.tv_nsec);
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return -1;
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}
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/* davem suggests we keep this within the 4M locked kernel image */
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@ -575,24 +529,20 @@ static struct of_platform_driver rtc_driver = {
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},
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};
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static struct platform_device rtc_bq4802_device = {
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.name = "rtc-bq4802",
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.id = -1,
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.num_resources = 1,
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};
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static int __devinit bq4802_probe(struct of_device *op, const struct of_device_id *match)
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{
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struct device_node *dp = op->node;
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unsigned long flags;
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bq4802_regs = of_ioremap(&op->resource[0], 0, resource_size(&op->resource[0]), "bq4802");
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if (!bq4802_regs)
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return -ENOMEM;
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printk(KERN_INFO "%s: BQ4802 regs at 0x%lx\n",
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op->node->full_name, op->resource[0].start);
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printk(KERN_INFO "%s: Clock regs at %p\n", dp->full_name, bq4802_regs);
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local_irq_save(flags);
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set_system_time();
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local_irq_restore(flags);
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return 0;
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rtc_bq4802_device.resource = &op->resource[0];
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return platform_device_register(&rtc_bq4802_device);
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}
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static struct of_device_id bq4802_match[] = {
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@ -984,56 +934,6 @@ unsigned long long sched_clock(void)
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>> SPARC64_NSEC_PER_CYC_SHIFT;
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}
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static int set_rtc_mmss(unsigned long nowtime)
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{
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int real_seconds, real_minutes, chip_minutes;
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void __iomem *bregs = bq4802_regs;
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unsigned long flags;
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unsigned char val;
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int retval = 0;
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/*
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* Not having a register set can lead to trouble.
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* Also starfire doesn't have a tod clock.
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*/
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if (!bregs)
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return -1;
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spin_lock_irqsave(&rtc_lock, flags);
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val = readb(bregs + 0x0e);
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/* BQ4802 RTC chip. */
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writeb(val | 0x08, bregs + 0x0e);
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chip_minutes = readb(bregs + 0x02);
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BCD_TO_BIN(chip_minutes);
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real_seconds = nowtime % 60;
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real_minutes = nowtime / 60;
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if (((abs(real_minutes - chip_minutes) + 15)/30) & 1)
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real_minutes += 30;
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real_minutes %= 60;
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if (abs(real_minutes - chip_minutes) < 30) {
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BIN_TO_BCD(real_seconds);
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BIN_TO_BCD(real_minutes);
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writeb(real_seconds, bregs + 0x00);
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writeb(real_minutes, bregs + 0x02);
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} else {
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printk(KERN_WARNING
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"set_rtc_mmss: can't update from %d to %d\n",
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chip_minutes, real_minutes);
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retval = -1;
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}
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writeb(val, bregs + 0x0e);
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spin_unlock_irqrestore(&rtc_lock, flags);
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return retval;
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}
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#define RTC_IS_OPEN 0x01 /* means /dev/rtc is in use */
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static unsigned char mini_rtc_status; /* bitmapped status byte. */
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@ -1155,78 +1055,6 @@ static int hypervisor_set_rtc_time(struct rtc_time *time)
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return hypervisor_set_time(seconds);
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}
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static void bq4802_get_rtc_time(struct rtc_time *time)
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{
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unsigned char val = readb(bq4802_regs + 0x0e);
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unsigned int century;
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writeb(val | 0x08, bq4802_regs + 0x0e);
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time->tm_sec = readb(bq4802_regs + 0x00);
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time->tm_min = readb(bq4802_regs + 0x02);
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time->tm_hour = readb(bq4802_regs + 0x04);
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time->tm_mday = readb(bq4802_regs + 0x06);
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time->tm_mon = readb(bq4802_regs + 0x09);
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time->tm_year = readb(bq4802_regs + 0x0a);
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time->tm_wday = readb(bq4802_regs + 0x08);
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century = readb(bq4802_regs + 0x0f);
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writeb(val, bq4802_regs + 0x0e);
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BCD_TO_BIN(time->tm_sec);
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BCD_TO_BIN(time->tm_min);
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BCD_TO_BIN(time->tm_hour);
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BCD_TO_BIN(time->tm_mday);
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BCD_TO_BIN(time->tm_mon);
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BCD_TO_BIN(time->tm_year);
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BCD_TO_BIN(time->tm_wday);
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BCD_TO_BIN(century);
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time->tm_year += (century * 100);
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time->tm_year -= 1900;
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time->tm_mon--;
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}
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static int bq4802_set_rtc_time(struct rtc_time *time)
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{
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unsigned char val = readb(bq4802_regs + 0x0e);
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unsigned char sec, min, hrs, day, mon, yrs, century;
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unsigned int year;
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year = time->tm_year + 1900;
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century = year / 100;
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yrs = year % 100;
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mon = time->tm_mon + 1; /* tm_mon starts at zero */
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day = time->tm_mday;
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hrs = time->tm_hour;
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min = time->tm_min;
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sec = time->tm_sec;
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BIN_TO_BCD(sec);
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BIN_TO_BCD(min);
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BIN_TO_BCD(hrs);
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BIN_TO_BCD(day);
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BIN_TO_BCD(mon);
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BIN_TO_BCD(yrs);
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BIN_TO_BCD(century);
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writeb(val | 0x08, bq4802_regs + 0x0e);
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writeb(sec, bq4802_regs + 0x00);
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writeb(min, bq4802_regs + 0x02);
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writeb(hrs, bq4802_regs + 0x04);
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writeb(day, bq4802_regs + 0x06);
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writeb(mon, bq4802_regs + 0x09);
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writeb(yrs, bq4802_regs + 0x0a);
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writeb(century, bq4802_regs + 0x0f);
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writeb(val, bq4802_regs + 0x0e);
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return 0;
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}
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struct mini_rtc_ops {
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void (*get_rtc_time)(struct rtc_time *);
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int (*set_rtc_time)(struct rtc_time *);
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@ -1242,11 +1070,6 @@ static struct mini_rtc_ops hypervisor_rtc_ops = {
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.set_rtc_time = hypervisor_set_rtc_time,
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};
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static struct mini_rtc_ops bq4802_rtc_ops = {
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.get_rtc_time = bq4802_get_rtc_time,
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.set_rtc_time = bq4802_set_rtc_time,
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};
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static struct mini_rtc_ops *mini_rtc_ops;
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static inline void mini_get_rtc_time(struct rtc_time *time)
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@ -1373,8 +1196,6 @@ static int __init rtc_mini_init(void)
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mini_rtc_ops = &hypervisor_rtc_ops;
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else if (this_is_starfire)
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mini_rtc_ops = &starfire_rtc_ops;
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else if (bq4802_regs)
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mini_rtc_ops = &bq4802_rtc_ops;
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else
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return -ENODEV;
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