diff options
author | Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> | 2011-11-14 06:24:53 (GMT) |
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committer | Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> | 2011-11-28 14:50:39 (GMT) |
commit | d28bdfc5c80fb64bf50824920bf9b554732dec74 (patch) | |
tree | 2f2ce017d27c0094a8a1561d532f73f50a4156fe /drivers/rtc/rtc-at91rm9200.c | |
parent | be6d4321720cd56623c1d5be311bde65c2c91229 (diff) | |
download | linux-d28bdfc5c80fb64bf50824920bf9b554732dec74.tar.xz |
ARM: at91: make rm9200 rtc drivers soc independent
switch the rtc drivers to resource and pass it via platform_device
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
Diffstat (limited to 'drivers/rtc/rtc-at91rm9200.c')
-rw-r--r-- | drivers/rtc/rtc-at91rm9200.c | 101 |
1 files changed, 63 insertions, 38 deletions
diff --git a/drivers/rtc/rtc-at91rm9200.c b/drivers/rtc/rtc-at91rm9200.c index e39b77a..dc474bc 100644 --- a/drivers/rtc/rtc-at91rm9200.c +++ b/drivers/rtc/rtc-at91rm9200.c @@ -32,11 +32,17 @@ #include <mach/at91_rtc.h> +#define at91_rtc_read(field) \ + __raw_readl(at91_rtc_regs + field) +#define at91_rtc_write(field, val) \ + __raw_writel((val), at91_rtc_regs + field) #define AT91_RTC_EPOCH 1900UL /* just like arch/arm/common/rtctime.c */ static DECLARE_COMPLETION(at91_rtc_updated); static unsigned int at91_alarm_year = AT91_RTC_EPOCH; +static void __iomem *at91_rtc_regs; +static int irq; /* * Decode time/date into rtc_time structure @@ -48,10 +54,10 @@ static void at91_rtc_decodetime(unsigned int timereg, unsigned int calreg, /* must read twice in case it changes */ do { - time = at91_sys_read(timereg); - date = at91_sys_read(calreg); - } while ((time != at91_sys_read(timereg)) || - (date != at91_sys_read(calreg))); + time = at91_rtc_read(timereg); + date = at91_rtc_read(calreg); + } while ((time != at91_rtc_read(timereg)) || + (date != at91_rtc_read(calreg))); tm->tm_sec = bcd2bin((time & AT91_RTC_SEC) >> 0); tm->tm_min = bcd2bin((time & AT91_RTC_MIN) >> 8); @@ -98,19 +104,19 @@ static int at91_rtc_settime(struct device *dev, struct rtc_time *tm) tm->tm_hour, tm->tm_min, tm->tm_sec); /* Stop Time/Calendar from counting */ - cr = at91_sys_read(AT91_RTC_CR); - at91_sys_write(AT91_RTC_CR, cr | AT91_RTC_UPDCAL | AT91_RTC_UPDTIM); + cr = at91_rtc_read(AT91_RTC_CR); + at91_rtc_write(AT91_RTC_CR, cr | AT91_RTC_UPDCAL | AT91_RTC_UPDTIM); - at91_sys_write(AT91_RTC_IER, AT91_RTC_ACKUPD); + at91_rtc_write(AT91_RTC_IER, AT91_RTC_ACKUPD); wait_for_completion(&at91_rtc_updated); /* wait for ACKUPD interrupt */ - at91_sys_write(AT91_RTC_IDR, AT91_RTC_ACKUPD); + at91_rtc_write(AT91_RTC_IDR, AT91_RTC_ACKUPD); - at91_sys_write(AT91_RTC_TIMR, + at91_rtc_write(AT91_RTC_TIMR, bin2bcd(tm->tm_sec) << 0 | bin2bcd(tm->tm_min) << 8 | bin2bcd(tm->tm_hour) << 16); - at91_sys_write(AT91_RTC_CALR, + at91_rtc_write(AT91_RTC_CALR, bin2bcd((tm->tm_year + 1900) / 100) /* century */ | bin2bcd(tm->tm_year % 100) << 8 /* year */ | bin2bcd(tm->tm_mon + 1) << 16 /* tm_mon starts at zero */ @@ -118,8 +124,8 @@ static int at91_rtc_settime(struct device *dev, struct rtc_time *tm) | bin2bcd(tm->tm_mday) << 24); /* Restart Time/Calendar */ - cr = at91_sys_read(AT91_RTC_CR); - at91_sys_write(AT91_RTC_CR, cr & ~(AT91_RTC_UPDCAL | AT91_RTC_UPDTIM)); + cr = at91_rtc_read(AT91_RTC_CR); + at91_rtc_write(AT91_RTC_CR, cr & ~(AT91_RTC_UPDCAL | AT91_RTC_UPDTIM)); return 0; } @@ -135,7 +141,7 @@ static int at91_rtc_readalarm(struct device *dev, struct rtc_wkalrm *alrm) tm->tm_yday = rtc_year_days(tm->tm_mday, tm->tm_mon, tm->tm_year); tm->tm_year = at91_alarm_year - 1900; - alrm->enabled = (at91_sys_read(AT91_RTC_IMR) & AT91_RTC_ALARM) + alrm->enabled = (at91_rtc_read(AT91_RTC_IMR) & AT91_RTC_ALARM) ? 1 : 0; pr_debug("%s(): %4d-%02d-%02d %02d:%02d:%02d\n", __func__, @@ -160,20 +166,20 @@ static int at91_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm) tm.tm_min = alrm->time.tm_min; tm.tm_sec = alrm->time.tm_sec; - at91_sys_write(AT91_RTC_IDR, AT91_RTC_ALARM); - at91_sys_write(AT91_RTC_TIMALR, + at91_rtc_write(AT91_RTC_IDR, AT91_RTC_ALARM); + at91_rtc_write(AT91_RTC_TIMALR, bin2bcd(tm.tm_sec) << 0 | bin2bcd(tm.tm_min) << 8 | bin2bcd(tm.tm_hour) << 16 | AT91_RTC_HOUREN | AT91_RTC_MINEN | AT91_RTC_SECEN); - at91_sys_write(AT91_RTC_CALALR, + at91_rtc_write(AT91_RTC_CALALR, bin2bcd(tm.tm_mon + 1) << 16 /* tm_mon starts at zero */ | bin2bcd(tm.tm_mday) << 24 | AT91_RTC_DATEEN | AT91_RTC_MTHEN); if (alrm->enabled) { - at91_sys_write(AT91_RTC_SCCR, AT91_RTC_ALARM); - at91_sys_write(AT91_RTC_IER, AT91_RTC_ALARM); + at91_rtc_write(AT91_RTC_SCCR, AT91_RTC_ALARM); + at91_rtc_write(AT91_RTC_IER, AT91_RTC_ALARM); } pr_debug("%s(): %4d-%02d-%02d %02d:%02d:%02d\n", __func__, @@ -188,10 +194,10 @@ static int at91_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) pr_debug("%s(): cmd=%08x\n", __func__, enabled); if (enabled) { - at91_sys_write(AT91_RTC_SCCR, AT91_RTC_ALARM); - at91_sys_write(AT91_RTC_IER, AT91_RTC_ALARM); + at91_rtc_write(AT91_RTC_SCCR, AT91_RTC_ALARM); + at91_rtc_write(AT91_RTC_IER, AT91_RTC_ALARM); } else - at91_sys_write(AT91_RTC_IDR, AT91_RTC_ALARM); + at91_rtc_write(AT91_RTC_IDR, AT91_RTC_ALARM); return 0; } @@ -200,7 +206,7 @@ static int at91_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) */ static int at91_rtc_proc(struct device *dev, struct seq_file *seq) { - unsigned long imr = at91_sys_read(AT91_RTC_IMR); + unsigned long imr = at91_rtc_read(AT91_RTC_IMR); seq_printf(seq, "update_IRQ\t: %s\n", (imr & AT91_RTC_ACKUPD) ? "yes" : "no"); @@ -220,7 +226,7 @@ static irqreturn_t at91_rtc_interrupt(int irq, void *dev_id) unsigned int rtsr; unsigned long events = 0; - rtsr = at91_sys_read(AT91_RTC_SR) & at91_sys_read(AT91_RTC_IMR); + rtsr = at91_rtc_read(AT91_RTC_SR) & at91_rtc_read(AT91_RTC_IMR); if (rtsr) { /* this interrupt is shared! Is it ours? */ if (rtsr & AT91_RTC_ALARM) events |= (RTC_AF | RTC_IRQF); @@ -229,7 +235,7 @@ static irqreturn_t at91_rtc_interrupt(int irq, void *dev_id) if (rtsr & AT91_RTC_ACKUPD) complete(&at91_rtc_updated); - at91_sys_write(AT91_RTC_SCCR, rtsr); /* clear status reg */ + at91_rtc_write(AT91_RTC_SCCR, rtsr); /* clear status reg */ rtc_update_irq(rtc, 1, events); @@ -256,22 +262,41 @@ static const struct rtc_class_ops at91_rtc_ops = { static int __init at91_rtc_probe(struct platform_device *pdev) { struct rtc_device *rtc; - int ret; + struct resource *regs; + int ret = 0; - at91_sys_write(AT91_RTC_CR, 0); - at91_sys_write(AT91_RTC_MR, 0); /* 24 hour mode */ + regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!regs) { + dev_err(&pdev->dev, "no mmio resource defined\n"); + return -ENXIO; + } + + irq = platform_get_irq(pdev, 0); + if (irq < 0) { + dev_err(&pdev->dev, "no irq resource defined\n"); + return -ENXIO; + } + + at91_rtc_regs = ioremap(regs->start, resource_size(regs)); + if (!at91_rtc_regs) { + dev_err(&pdev->dev, "failed to map registers, aborting.\n"); + return -ENOMEM; + } + + at91_rtc_write(AT91_RTC_CR, 0); + at91_rtc_write(AT91_RTC_MR, 0); /* 24 hour mode */ /* Disable all interrupts */ - at91_sys_write(AT91_RTC_IDR, AT91_RTC_ACKUPD | AT91_RTC_ALARM | + at91_rtc_write(AT91_RTC_IDR, AT91_RTC_ACKUPD | AT91_RTC_ALARM | AT91_RTC_SECEV | AT91_RTC_TIMEV | AT91_RTC_CALEV); - ret = request_irq(AT91_ID_SYS, at91_rtc_interrupt, + ret = request_irq(irq, at91_rtc_interrupt, IRQF_SHARED, "at91_rtc", pdev); if (ret) { printk(KERN_ERR "at91_rtc: IRQ %d already in use.\n", - AT91_ID_SYS); + irq); return ret; } @@ -284,7 +309,7 @@ static int __init at91_rtc_probe(struct platform_device *pdev) rtc = rtc_device_register(pdev->name, &pdev->dev, &at91_rtc_ops, THIS_MODULE); if (IS_ERR(rtc)) { - free_irq(AT91_ID_SYS, pdev); + free_irq(irq, pdev); return PTR_ERR(rtc); } platform_set_drvdata(pdev, rtc); @@ -301,10 +326,10 @@ static int __exit at91_rtc_remove(struct platform_device *pdev) struct rtc_device *rtc = platform_get_drvdata(pdev); /* Disable all interrupts */ - at91_sys_write(AT91_RTC_IDR, AT91_RTC_ACKUPD | AT91_RTC_ALARM | + at91_rtc_write(AT91_RTC_IDR, AT91_RTC_ACKUPD | AT91_RTC_ALARM | AT91_RTC_SECEV | AT91_RTC_TIMEV | AT91_RTC_CALEV); - free_irq(AT91_ID_SYS, pdev); + free_irq(irq, pdev); rtc_device_unregister(rtc); platform_set_drvdata(pdev, NULL); @@ -323,13 +348,13 @@ static int at91_rtc_suspend(struct device *dev) /* this IRQ is shared with DBGU and other hardware which isn't * necessarily doing PM like we are... */ - at91_rtc_imr = at91_sys_read(AT91_RTC_IMR) + at91_rtc_imr = at91_rtc_read(AT91_RTC_IMR) & (AT91_RTC_ALARM|AT91_RTC_SECEV); if (at91_rtc_imr) { if (device_may_wakeup(dev)) - enable_irq_wake(AT91_ID_SYS); + enable_irq_wake(irq); else - at91_sys_write(AT91_RTC_IDR, at91_rtc_imr); + at91_rtc_write(AT91_RTC_IDR, at91_rtc_imr); } return 0; } @@ -338,9 +363,9 @@ static int at91_rtc_resume(struct device *dev) { if (at91_rtc_imr) { if (device_may_wakeup(dev)) - disable_irq_wake(AT91_ID_SYS); + disable_irq_wake(irq); else - at91_sys_write(AT91_RTC_IER, at91_rtc_imr); + at91_rtc_write(AT91_RTC_IER, at91_rtc_imr); } return 0; } |