diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/rtc/rtc-stmp3xxx.c | 61 |
1 files changed, 18 insertions, 43 deletions
diff --git a/drivers/rtc/rtc-stmp3xxx.c b/drivers/rtc/rtc-stmp3xxx.c index ad185179694..7315068daa5 100644 --- a/drivers/rtc/rtc-stmp3xxx.c +++ b/drivers/rtc/rtc-stmp3xxx.c @@ -6,6 +6,7 @@ * * Copyright 2008 Freescale Semiconductor, Inc. All Rights Reserved. * Copyright 2008 Embedded Alley Solutions, Inc All Rights Reserved. + * Copyright 2011 Wolfram Sang, Pengutronix e.K. */ /* @@ -33,7 +34,6 @@ #define STMP3XXX_RTC_CTRL_ALARM_IRQ_EN 0x00000001 #define STMP3XXX_RTC_CTRL_ONEMSEC_IRQ_EN 0x00000002 #define STMP3XXX_RTC_CTRL_ALARM_IRQ 0x00000004 -#define STMP3XXX_RTC_CTRL_ONEMSEC_IRQ 0x00000008 #define STMP3XXX_RTC_STAT 0x10 #define STMP3XXX_RTC_STAT_STALE_SHIFT 16 @@ -52,9 +52,8 @@ struct stmp3xxx_rtc_data { struct rtc_device *rtc; - unsigned irq_count; void __iomem *io; - int irq_alarm, irq_1msec; + int irq_alarm; }; static void stmp3xxx_wait_time(struct stmp3xxx_rtc_data *rtc_data) @@ -92,32 +91,16 @@ static int stmp3xxx_rtc_set_mmss(struct device *dev, unsigned long t) static irqreturn_t stmp3xxx_rtc_interrupt(int irq, void *dev_id) { struct stmp3xxx_rtc_data *rtc_data = dev_get_drvdata(dev_id); - u32 status; - u32 events = 0; - - status = readl(rtc_data->io + STMP3XXX_RTC_CTRL) & - (STMP3XXX_RTC_CTRL_ALARM_IRQ | - STMP3XXX_RTC_CTRL_ONEMSEC_IRQ); + u32 status = readl(rtc_data->io + STMP3XXX_RTC_CTRL); if (status & STMP3XXX_RTC_CTRL_ALARM_IRQ) { writel(STMP3XXX_RTC_CTRL_ALARM_IRQ, rtc_data->io + STMP3XXX_RTC_CTRL_CLR); - events |= RTC_AF | RTC_IRQF; + rtc_update_irq(rtc_data->rtc, 1, RTC_AF | RTC_IRQF); + return IRQ_HANDLED; } - if (status & STMP3XXX_RTC_CTRL_ONEMSEC_IRQ) { - writel(STMP3XXX_RTC_CTRL_ONEMSEC_IRQ, - rtc_data->io + STMP3XXX_RTC_CTRL_CLR); - if (++rtc_data->irq_count % 1000 == 0) { - events |= RTC_UF | RTC_IRQF; - rtc_data->irq_count = 0; - } - } - - if (events) - rtc_update_irq(rtc_data->rtc, 1, events); - - return IRQ_HANDLED; + return IRQ_NONE; } static int stmp3xxx_alarm_irq_enable(struct device *dev, unsigned int enabled) @@ -155,6 +138,9 @@ static int stmp3xxx_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm) rtc_tm_to_time(&alm->time, &t); writel(t, rtc_data->io + STMP3XXX_RTC_ALARM); + + stmp3xxx_alarm_irq_enable(dev, alm->enabled); + return 0; } @@ -174,11 +160,9 @@ static int stmp3xxx_rtc_remove(struct platform_device *pdev) if (!rtc_data) return 0; - writel(STMP3XXX_RTC_CTRL_ONEMSEC_IRQ_EN | - STMP3XXX_RTC_CTRL_ALARM_IRQ_EN, + writel(STMP3XXX_RTC_CTRL_ALARM_IRQ_EN, rtc_data->io + STMP3XXX_RTC_CTRL_CLR); free_irq(rtc_data->irq_alarm, &pdev->dev); - free_irq(rtc_data->irq_1msec, &pdev->dev); rtc_device_unregister(rtc_data->rtc); platform_set_drvdata(pdev, NULL); iounmap(rtc_data->io); @@ -212,7 +196,6 @@ static int stmp3xxx_rtc_probe(struct platform_device *pdev) } rtc_data->irq_alarm = platform_get_irq(pdev, 0); - rtc_data->irq_1msec = platform_get_irq(pdev, 1); if (!(readl(STMP3XXX_RTC_STAT + rtc_data->io) & STMP3XXX_RTC_STAT_RTC_PRESENT)) { @@ -229,6 +212,10 @@ static int stmp3xxx_rtc_probe(struct platform_device *pdev) STMP3XXX_RTC_PERSISTENT0_ALARM_WAKE, rtc_data->io + STMP3XXX_RTC_PERSISTENT0_CLR); + writel(STMP3XXX_RTC_CTRL_ONEMSEC_IRQ_EN | + STMP3XXX_RTC_CTRL_ALARM_IRQ_EN, + rtc_data->io + STMP3XXX_RTC_CTRL_CLR); + rtc_data->rtc = rtc_device_register(pdev->name, &pdev->dev, &stmp3xxx_rtc_ops, THIS_MODULE); if (IS_ERR(rtc_data->rtc)) { @@ -236,30 +223,17 @@ static int stmp3xxx_rtc_probe(struct platform_device *pdev) goto out_remap; } - rtc_data->irq_count = 0; - err = request_irq(rtc_data->irq_alarm, stmp3xxx_rtc_interrupt, - IRQF_DISABLED, "RTC alarm", &pdev->dev); + err = request_irq(rtc_data->irq_alarm, stmp3xxx_rtc_interrupt, 0, + "RTC alarm", &pdev->dev); if (err) { dev_err(&pdev->dev, "Cannot claim IRQ%d\n", rtc_data->irq_alarm); goto out_irq_alarm; } - err = request_irq(rtc_data->irq_1msec, stmp3xxx_rtc_interrupt, - IRQF_DISABLED, "RTC tick", &pdev->dev); - if (err) { - dev_err(&pdev->dev, "Cannot claim IRQ%d\n", - rtc_data->irq_1msec); - goto out_irq1; - } return 0; -out_irq1: - free_irq(rtc_data->irq_alarm, &pdev->dev); out_irq_alarm: - writel(STMP3XXX_RTC_CTRL_ONEMSEC_IRQ_EN | - STMP3XXX_RTC_CTRL_ALARM_IRQ_EN, - rtc_data->io + STMP3XXX_RTC_CTRL_CLR); rtc_device_unregister(rtc_data->rtc); out_remap: platform_set_drvdata(pdev, NULL); @@ -316,5 +290,6 @@ module_init(stmp3xxx_rtc_init); module_exit(stmp3xxx_rtc_exit); MODULE_DESCRIPTION("STMP3xxx RTC Driver"); -MODULE_AUTHOR("dmitry pervushin <dpervushin@embeddedalley.com>"); +MODULE_AUTHOR("dmitry pervushin <dpervushin@embeddedalley.com> and " + "Wolfram Sang <w.sang@pengutronix.de>"); MODULE_LICENSE("GPL"); |