rtc-mv: add support for Alarm
This patch adds the Alarm support, this mode enabled when adding IORESOURCE_IRQ to the platform device resources. The patch also enables the wakeup mode, so the wakealarm sysfs file (under /sys/class/rtc/rtcX/) can be used to configure the alarm clock. Signed-off-by: Saeed Bishara <saeed@marvell.com> Signed-off-by: Nicolas Pitre <nico@marvell.com> Signed-off-by: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Родитель
a766ae3ebd
Коммит
aeedacaeaf
|
@ -27,10 +27,17 @@
|
|||
#define RTC_MONTH_OFFS 8
|
||||
#define RTC_YEAR_OFFS 16
|
||||
|
||||
#define RTC_ALARM_TIME_REG_OFFS 8
|
||||
#define RTC_ALARM_DATE_REG_OFFS 0xc
|
||||
#define RTC_ALARM_VALID (1 << 7)
|
||||
|
||||
#define RTC_ALARM_INTERRUPT_MASK_REG_OFFS 0x10
|
||||
#define RTC_ALARM_INTERRUPT_CASUE_REG_OFFS 0x14
|
||||
|
||||
struct rtc_plat_data {
|
||||
struct rtc_device *rtc;
|
||||
void __iomem *ioaddr;
|
||||
int irq;
|
||||
};
|
||||
|
||||
static int mv_rtc_set_time(struct device *dev, struct rtc_time *tm)
|
||||
|
@ -84,12 +91,134 @@ static int mv_rtc_read_time(struct device *dev, struct rtc_time *tm)
|
|||
return rtc_valid_tm(tm);
|
||||
}
|
||||
|
||||
static int mv_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm)
|
||||
{
|
||||
struct rtc_plat_data *pdata = dev_get_drvdata(dev);
|
||||
void __iomem *ioaddr = pdata->ioaddr;
|
||||
u32 rtc_time, rtc_date;
|
||||
unsigned int year, month, day, hour, minute, second, wday;
|
||||
|
||||
rtc_time = readl(ioaddr + RTC_ALARM_TIME_REG_OFFS);
|
||||
rtc_date = readl(ioaddr + RTC_ALARM_DATE_REG_OFFS);
|
||||
|
||||
second = rtc_time & 0x7f;
|
||||
minute = (rtc_time >> RTC_MINUTES_OFFS) & 0x7f;
|
||||
hour = (rtc_time >> RTC_HOURS_OFFS) & 0x3f; /* assume 24 hours mode */
|
||||
wday = (rtc_time >> RTC_WDAY_OFFS) & 0x7;
|
||||
|
||||
day = rtc_date & 0x3f;
|
||||
month = (rtc_date >> RTC_MONTH_OFFS) & 0x3f;
|
||||
year = (rtc_date >> RTC_YEAR_OFFS) & 0xff;
|
||||
|
||||
alm->time.tm_sec = bcd2bin(second);
|
||||
alm->time.tm_min = bcd2bin(minute);
|
||||
alm->time.tm_hour = bcd2bin(hour);
|
||||
alm->time.tm_mday = bcd2bin(day);
|
||||
alm->time.tm_wday = bcd2bin(wday);
|
||||
alm->time.tm_mon = bcd2bin(month) - 1;
|
||||
/* hw counts from year 2000, but tm_year is relative to 1900 */
|
||||
alm->time.tm_year = bcd2bin(year) + 100;
|
||||
|
||||
if (rtc_valid_tm(&alm->time) < 0) {
|
||||
dev_err(dev, "retrieved alarm date/time is not valid.\n");
|
||||
rtc_time_to_tm(0, &alm->time);
|
||||
}
|
||||
|
||||
alm->enabled = !!readl(ioaddr + RTC_ALARM_INTERRUPT_MASK_REG_OFFS);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int mv_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm)
|
||||
{
|
||||
struct rtc_plat_data *pdata = dev_get_drvdata(dev);
|
||||
void __iomem *ioaddr = pdata->ioaddr;
|
||||
u32 rtc_reg = 0;
|
||||
|
||||
if (alm->time.tm_sec >= 0)
|
||||
rtc_reg |= (RTC_ALARM_VALID | bin2bcd(alm->time.tm_sec))
|
||||
<< RTC_SECONDS_OFFS;
|
||||
if (alm->time.tm_min >= 0)
|
||||
rtc_reg |= (RTC_ALARM_VALID | bin2bcd(alm->time.tm_min))
|
||||
<< RTC_MINUTES_OFFS;
|
||||
if (alm->time.tm_hour >= 0)
|
||||
rtc_reg |= (RTC_ALARM_VALID | bin2bcd(alm->time.tm_hour))
|
||||
<< RTC_HOURS_OFFS;
|
||||
|
||||
writel(rtc_reg, ioaddr + RTC_ALARM_TIME_REG_OFFS);
|
||||
|
||||
if (alm->time.tm_mday >= 0)
|
||||
rtc_reg = (RTC_ALARM_VALID | bin2bcd(alm->time.tm_mday))
|
||||
<< RTC_MDAY_OFFS;
|
||||
else
|
||||
rtc_reg = 0;
|
||||
|
||||
if (alm->time.tm_mon >= 0)
|
||||
rtc_reg |= (RTC_ALARM_VALID | bin2bcd(alm->time.tm_mon + 1))
|
||||
<< RTC_MONTH_OFFS;
|
||||
|
||||
if (alm->time.tm_year >= 0)
|
||||
rtc_reg |= (RTC_ALARM_VALID | bin2bcd(alm->time.tm_year % 100))
|
||||
<< RTC_YEAR_OFFS;
|
||||
|
||||
writel(rtc_reg, ioaddr + RTC_ALARM_DATE_REG_OFFS);
|
||||
writel(0, ioaddr + RTC_ALARM_INTERRUPT_CASUE_REG_OFFS);
|
||||
writel(alm->enabled ? 1 : 0,
|
||||
ioaddr + RTC_ALARM_INTERRUPT_MASK_REG_OFFS);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int mv_rtc_ioctl(struct device *dev, unsigned int cmd,
|
||||
unsigned long arg)
|
||||
{
|
||||
struct platform_device *pdev = to_platform_device(dev);
|
||||
struct rtc_plat_data *pdata = platform_get_drvdata(pdev);
|
||||
void __iomem *ioaddr = pdata->ioaddr;
|
||||
|
||||
if (pdata->irq < 0)
|
||||
return -ENOIOCTLCMD; /* fall back into rtc-dev's emulation */
|
||||
switch (cmd) {
|
||||
case RTC_AIE_OFF:
|
||||
writel(0, ioaddr + RTC_ALARM_INTERRUPT_MASK_REG_OFFS);
|
||||
break;
|
||||
case RTC_AIE_ON:
|
||||
writel(1, ioaddr + RTC_ALARM_INTERRUPT_MASK_REG_OFFS);
|
||||
break;
|
||||
default:
|
||||
return -ENOIOCTLCMD;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static irqreturn_t mv_rtc_interrupt(int irq, void *data)
|
||||
{
|
||||
struct rtc_plat_data *pdata = data;
|
||||
void __iomem *ioaddr = pdata->ioaddr;
|
||||
|
||||
/* alarm irq? */
|
||||
if (!readl(ioaddr + RTC_ALARM_INTERRUPT_CASUE_REG_OFFS))
|
||||
return IRQ_NONE;
|
||||
|
||||
/* clear interrupt */
|
||||
writel(0, ioaddr + RTC_ALARM_INTERRUPT_CASUE_REG_OFFS);
|
||||
rtc_update_irq(pdata->rtc, 1, RTC_IRQF | RTC_AF);
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
static const struct rtc_class_ops mv_rtc_ops = {
|
||||
.read_time = mv_rtc_read_time,
|
||||
.set_time = mv_rtc_set_time,
|
||||
};
|
||||
|
||||
static int __init mv_rtc_probe(struct platform_device *pdev)
|
||||
static const struct rtc_class_ops mv_rtc_alarm_ops = {
|
||||
.read_time = mv_rtc_read_time,
|
||||
.set_time = mv_rtc_set_time,
|
||||
.read_alarm = mv_rtc_read_alarm,
|
||||
.set_alarm = mv_rtc_set_alarm,
|
||||
.ioctl = mv_rtc_ioctl,
|
||||
};
|
||||
|
||||
static int __devinit mv_rtc_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct resource *res;
|
||||
struct rtc_plat_data *pdata;
|
||||
|
@ -130,12 +259,31 @@ static int __init mv_rtc_probe(struct platform_device *pdev)
|
|||
}
|
||||
}
|
||||
|
||||
pdata->irq = platform_get_irq(pdev, 0);
|
||||
|
||||
platform_set_drvdata(pdev, pdata);
|
||||
pdata->rtc = rtc_device_register(pdev->name, &pdev->dev,
|
||||
&mv_rtc_ops, THIS_MODULE);
|
||||
|
||||
if (pdata->irq >= 0) {
|
||||
device_init_wakeup(&pdev->dev, 1);
|
||||
pdata->rtc = rtc_device_register(pdev->name, &pdev->dev,
|
||||
&mv_rtc_alarm_ops,
|
||||
THIS_MODULE);
|
||||
} else
|
||||
pdata->rtc = rtc_device_register(pdev->name, &pdev->dev,
|
||||
&mv_rtc_ops, THIS_MODULE);
|
||||
if (IS_ERR(pdata->rtc))
|
||||
return PTR_ERR(pdata->rtc);
|
||||
|
||||
if (pdata->irq >= 0) {
|
||||
writel(0, pdata->ioaddr + RTC_ALARM_INTERRUPT_MASK_REG_OFFS);
|
||||
if (devm_request_irq(&pdev->dev, pdata->irq, mv_rtc_interrupt,
|
||||
IRQF_DISABLED | IRQF_SHARED,
|
||||
pdev->name, pdata) < 0) {
|
||||
dev_warn(&pdev->dev, "interrupt not available.\n");
|
||||
pdata->irq = -1;
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
@ -143,6 +291,9 @@ static int __exit mv_rtc_remove(struct platform_device *pdev)
|
|||
{
|
||||
struct rtc_plat_data *pdata = platform_get_drvdata(pdev);
|
||||
|
||||
if (pdata->irq >= 0)
|
||||
device_init_wakeup(&pdev->dev, 0);
|
||||
|
||||
rtc_device_unregister(pdata->rtc);
|
||||
return 0;
|
||||
}
|
||||
|
|
Загрузка…
Ссылка в новой задаче