diff options
Diffstat (limited to 'drivers/rtc/rtc-s3c.c')
| -rw-r--r-- | drivers/rtc/rtc-s3c.c | 105 |
1 files changed, 57 insertions, 48 deletions
diff --git a/drivers/rtc/rtc-s3c.c b/drivers/rtc/rtc-s3c.c index 9329dbb9ebab..7639ab906f02 100644 --- a/drivers/rtc/rtc-s3c.c +++ b/drivers/rtc/rtc-s3c.c @@ -51,6 +51,27 @@ static enum s3c_cpu_type s3c_rtc_cpu_type; static DEFINE_SPINLOCK(s3c_rtc_pie_lock); +static void s3c_rtc_alarm_clk_enable(bool enable) +{ + static DEFINE_SPINLOCK(s3c_rtc_alarm_clk_lock); + static bool alarm_clk_enabled; + unsigned long irq_flags; + + spin_lock_irqsave(&s3c_rtc_alarm_clk_lock, irq_flags); + if (enable) { + if (!alarm_clk_enabled) { + clk_enable(rtc_clk); + alarm_clk_enabled = true; + } + } else { + if (alarm_clk_enabled) { + clk_disable(rtc_clk); + alarm_clk_enabled = false; + } + } + spin_unlock_irqrestore(&s3c_rtc_alarm_clk_lock, irq_flags); +} + /* IRQ Handlers */ static irqreturn_t s3c_rtc_alarmirq(int irq, void *id) @@ -64,6 +85,9 @@ static irqreturn_t s3c_rtc_alarmirq(int irq, void *id) writeb(S3C2410_INTP_ALM, s3c_rtc_base + S3C2410_INTP); clk_disable(rtc_clk); + + s3c_rtc_alarm_clk_enable(false); + return IRQ_HANDLED; } @@ -97,6 +121,8 @@ static int s3c_rtc_setaie(struct device *dev, unsigned int enabled) writeb(tmp, s3c_rtc_base + S3C2410_RTCALM); clk_disable(rtc_clk); + s3c_rtc_alarm_clk_enable(enabled); + return 0; } @@ -152,10 +178,6 @@ static int s3c_rtc_gettime(struct device *dev, struct rtc_time *rtc_tm) goto retry_get_time; } - pr_debug("read time %04d.%02d.%02d %02d:%02d:%02d\n", - 1900 + rtc_tm->tm_year, rtc_tm->tm_mon, rtc_tm->tm_mday, - rtc_tm->tm_hour, rtc_tm->tm_min, rtc_tm->tm_sec); - rtc_tm->tm_sec = bcd2bin(rtc_tm->tm_sec); rtc_tm->tm_min = bcd2bin(rtc_tm->tm_min); rtc_tm->tm_hour = bcd2bin(rtc_tm->tm_hour); @@ -164,6 +186,11 @@ static int s3c_rtc_gettime(struct device *dev, struct rtc_time *rtc_tm) rtc_tm->tm_year = bcd2bin(rtc_tm->tm_year); rtc_tm->tm_year += 100; + + pr_debug("read time %04d.%02d.%02d %02d:%02d:%02d\n", + 1900 + rtc_tm->tm_year, rtc_tm->tm_mon, rtc_tm->tm_mday, + rtc_tm->tm_hour, rtc_tm->tm_min, rtc_tm->tm_sec); + rtc_tm->tm_mon -= 1; clk_disable(rtc_clk); @@ -269,10 +296,9 @@ static int s3c_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm) clk_enable(rtc_clk); pr_debug("s3c_rtc_setalarm: %d, %04d.%02d.%02d %02d:%02d:%02d\n", alrm->enabled, - 1900 + tm->tm_year, tm->tm_mon, tm->tm_mday, + 1900 + tm->tm_year, tm->tm_mon + 1, tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec); - alrm_en = readb(base + S3C2410_RTCALM) & S3C2410_RTCALM_ALMEN; writeb(0x00, base + S3C2410_RTCALM); @@ -319,49 +345,7 @@ static int s3c_rtc_proc(struct device *dev, struct seq_file *seq) return 0; } -static int s3c_rtc_open(struct device *dev) -{ - struct platform_device *pdev = to_platform_device(dev); - struct rtc_device *rtc_dev = platform_get_drvdata(pdev); - int ret; - - ret = request_irq(s3c_rtc_alarmno, s3c_rtc_alarmirq, - IRQF_DISABLED, "s3c2410-rtc alarm", rtc_dev); - - if (ret) { - dev_err(dev, "IRQ%d error %d\n", s3c_rtc_alarmno, ret); - return ret; - } - - ret = request_irq(s3c_rtc_tickno, s3c_rtc_tickirq, - IRQF_DISABLED, "s3c2410-rtc tick", rtc_dev); - - if (ret) { - dev_err(dev, "IRQ%d error %d\n", s3c_rtc_tickno, ret); - goto tick_err; - } - - return ret; - - tick_err: - free_irq(s3c_rtc_alarmno, rtc_dev); - return ret; -} - -static void s3c_rtc_release(struct device *dev) -{ - struct platform_device *pdev = to_platform_device(dev); - struct rtc_device *rtc_dev = platform_get_drvdata(pdev); - - /* do not clear AIE here, it may be needed for wake */ - - free_irq(s3c_rtc_alarmno, rtc_dev); - free_irq(s3c_rtc_tickno, rtc_dev); -} - static const struct rtc_class_ops s3c_rtcops = { - .open = s3c_rtc_open, - .release = s3c_rtc_release, .read_time = s3c_rtc_gettime, .set_time = s3c_rtc_settime, .read_alarm = s3c_rtc_getalarm, @@ -425,6 +409,9 @@ static int __devexit s3c_rtc_remove(struct platform_device *dev) { struct rtc_device *rtc = platform_get_drvdata(dev); + free_irq(s3c_rtc_alarmno, rtc); + free_irq(s3c_rtc_tickno, rtc); + platform_set_drvdata(dev, NULL); rtc_device_unregister(rtc); @@ -548,10 +535,32 @@ static int __devinit s3c_rtc_probe(struct platform_device *pdev) s3c_rtc_setfreq(&pdev->dev, 1); + ret = request_irq(s3c_rtc_alarmno, s3c_rtc_alarmirq, + IRQF_DISABLED, "s3c2410-rtc alarm", rtc); + if (ret) { + dev_err(&pdev->dev, "IRQ%d error %d\n", s3c_rtc_alarmno, ret); + goto err_alarm_irq; + } + + ret = request_irq(s3c_rtc_tickno, s3c_rtc_tickirq, + IRQF_DISABLED, "s3c2410-rtc tick", rtc); + if (ret) { + dev_err(&pdev->dev, "IRQ%d error %d\n", s3c_rtc_tickno, ret); + free_irq(s3c_rtc_alarmno, rtc); + goto err_tick_irq; + } + clk_disable(rtc_clk); return 0; + err_tick_irq: + free_irq(s3c_rtc_alarmno, rtc); + + err_alarm_irq: + platform_set_drvdata(pdev, NULL); + rtc_device_unregister(rtc); + err_nortc: s3c_rtc_enable(pdev, 0); clk_disable(rtc_clk); |