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path: root/drivers/rtc/rtc-pxa.c
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Diffstat (limited to 'drivers/rtc/rtc-pxa.c')
-rw-r--r--drivers/rtc/rtc-pxa.c81
1 files changed, 69 insertions, 12 deletions
diff --git a/drivers/rtc/rtc-pxa.c b/drivers/rtc/rtc-pxa.c
index f771b2ee4b18..b7e462978609 100644
--- a/drivers/rtc/rtc-pxa.c
+++ b/drivers/rtc/rtc-pxa.c
@@ -19,6 +19,7 @@
*
*/
+#include <linux/delay.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/module.h>
@@ -62,6 +63,10 @@
#define RYxR_MONTH_S 5
#define RYxR_MONTH_MASK (0xf << RYxR_MONTH_S)
#define RYxR_DAY_MASK 0x1f
+#define RDxR_WOM_S 20
+#define RDxR_WOM_MASK (0x7 << RDxR_WOM_S)
+#define RDxR_DOW_S 17
+#define RDxR_DOW_MASK (0x7 << RDxR_DOW_S)
#define RDxR_HOUR_S 12
#define RDxR_HOUR_MASK (0x1f << RDxR_HOUR_S)
#define RDxR_MIN_S 6
@@ -76,21 +81,29 @@
#define RYAR1 0x1c
#define RTCPICR 0x34
#define PIAR 0x38
+#define PSBR_RTC 0x00
#define rtc_readl(pxa_rtc, reg) \
__raw_readl((pxa_rtc)->base + (reg))
#define rtc_writel(pxa_rtc, reg, value) \
__raw_writel((value), (pxa_rtc)->base + (reg))
+#define rtc_readl_psbr(pxa_rtc, reg) \
+ __raw_readl((pxa_rtc)->base_psbr + (reg))
+#define rtc_writel_psbr(pxa_rtc, reg, value) \
+ __raw_writel((value), (pxa_rtc)->base_psbr + (reg))
struct pxa_rtc {
struct resource *ress;
+ struct resource *ress_psbr;
void __iomem *base;
+ void __iomem *base_psbr;
int irq_1Hz;
int irq_Alrm;
struct rtc_device *rtc;
spinlock_t lock; /* Protects this structure */
};
+static struct pxa_rtc *rtc_info;
static u32 ryxr_calc(struct rtc_time *tm)
{
return ((tm->tm_year + 1900) << RYxR_YEAR_S)
@@ -100,7 +113,10 @@ static u32 ryxr_calc(struct rtc_time *tm)
static u32 rdxr_calc(struct rtc_time *tm)
{
- return (tm->tm_hour << RDxR_HOUR_S) | (tm->tm_min << RDxR_MIN_S)
+ return ((((tm->tm_mday + 6) / 7) << RDxR_WOM_S) & RDxR_WOM_MASK)
+ | (((tm->tm_wday + 1) << RDxR_DOW_S) & RDxR_DOW_MASK)
+ | (tm->tm_hour << RDxR_HOUR_S)
+ | (tm->tm_min << RDxR_MIN_S)
| tm->tm_sec;
}
@@ -109,6 +125,7 @@ static void tm_calc(u32 rycr, u32 rdcr, struct rtc_time *tm)
tm->tm_year = ((rycr & RYxR_YEAR_MASK) >> RYxR_YEAR_S) - 1900;
tm->tm_mon = (((rycr & RYxR_MONTH_MASK) >> RYxR_MONTH_S)) - 1;
tm->tm_mday = (rycr & RYxR_DAY_MASK);
+ tm->tm_wday = ((rdcr & RDxR_DOW_MASK) >> RDxR_DOW_S) - 1;
tm->tm_hour = (rdcr & RDxR_HOUR_MASK) >> RDxR_HOUR_S;
tm->tm_min = (rdcr & RDxR_MIN_MASK) >> RDxR_MIN_S;
tm->tm_sec = rdcr & RDxR_SEC_MASK;
@@ -166,7 +183,6 @@ static irqreturn_t pxa_rtc_irq(int irq, void *dev_id)
/* enable back rtc interrupts */
rtc_writel(pxa_rtc, RTSR, rtsr & ~RTSR_TRIG_MASK);
-
spin_unlock(&pxa_rtc->lock);
return IRQ_HANDLED;
}
@@ -241,12 +257,45 @@ static int pxa_rtc_read_time(struct device *dev, struct rtc_time *tm)
static int pxa_rtc_set_time(struct device *dev, struct rtc_time *tm)
{
struct pxa_rtc *pxa_rtc = dev_get_drvdata(dev);
-
+ /* sequence to wirte pxa rtc register RCNR RDCR RYCR is
+ *1. set PSBR[RWE] bit, take 2x32-khz to complete
+ *2. write to RTC register,take 2x32-khz to complete
+ *3. clear PSBR[RWE] bit,take 2x32-khz to complete
+ */
+ if ((tm->tm_year < 70) || (tm->tm_year > 138))
+ return -EINVAL;
+ rtc_writel_psbr(rtc_info, PSBR_RTC, 0x01);
+ udelay(100);
rtc_writel(pxa_rtc, RYCR, ryxr_calc(tm));
rtc_writel(pxa_rtc, RDCR, rdxr_calc(tm));
+ udelay(100);
+ rtc_writel_psbr(rtc_info, PSBR_RTC, 0x00);
+ udelay(100);
+ pxa_rtc_read_time(dev, tm);
+ dev_info(dev, "tm.year = %d, tm.month = %d, tm.day = %d\n",
+ tm->tm_year + 1900, tm->tm_mon, tm->tm_mday);
+ return 0;
+}
+int pxa_rtc_sync_time(unsigned int ticks)
+{
+ /* sequence to wirte pxa rtc register RCNR RDCR RYCR is
+ *1. set PSBR[RWE] bit, take 2x32-khz to complete
+ *2. write to RTC register,take 2x32-khz to complete
+ *3. clear PSBR[RWE] bit,take 2x32-khz to complete
+ */
+ struct rtc_time tm;
+ rtc_time_to_tm(ticks, &tm);
+ rtc_writel_psbr(rtc_info, PSBR_RTC, 0x01);
+ udelay(100);
+ rtc_writel(rtc_info, RYCR, ryxr_calc(&tm));
+ rtc_writel(rtc_info, RDCR, rdxr_calc(&tm));
+ udelay(100);
+ rtc_writel_psbr(rtc_info, PSBR_RTC, 0x00);
+ udelay(100);
return 0;
}
+EXPORT_SYMBOL(pxa_rtc_sync_time);
static int pxa_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
{
@@ -300,8 +349,6 @@ static int pxa_rtc_proc(struct device *dev, struct seq_file *seq)
}
static const struct rtc_class_ops pxa_rtc_ops = {
- .open = pxa_rtc_open,
- .release = pxa_rtc_release,
.read_time = pxa_rtc_read_time,
.set_time = pxa_rtc_set_time,
.read_alarm = pxa_rtc_read_alarm,
@@ -320,7 +367,7 @@ static int __init pxa_rtc_probe(struct platform_device *pdev)
pxa_rtc = kzalloc(sizeof(struct pxa_rtc), GFP_KERNEL);
if (!pxa_rtc)
return -ENOMEM;
-
+ rtc_info = pxa_rtc;
spin_lock_init(&pxa_rtc->lock);
platform_set_drvdata(pdev, pxa_rtc);
@@ -330,6 +377,11 @@ static int __init pxa_rtc_probe(struct platform_device *pdev)
dev_err(dev, "No I/O memory resource defined\n");
goto err_ress;
}
+ pxa_rtc->ress_psbr = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ if (!pxa_rtc->ress_psbr) {
+ dev_err(dev, "No I/O memory resource defined\n");
+ goto err_ress;
+ }
pxa_rtc->irq_1Hz = platform_get_irq(pdev, 0);
if (pxa_rtc->irq_1Hz < 0) {
@@ -341,7 +393,6 @@ static int __init pxa_rtc_probe(struct platform_device *pdev)
dev_err(dev, "No alarm IRQ resource defined\n");
goto err_ress;
}
-
ret = -ENOMEM;
pxa_rtc->base = ioremap(pxa_rtc->ress->start,
resource_size(pxa_rtc->ress));
@@ -350,6 +401,12 @@ static int __init pxa_rtc_probe(struct platform_device *pdev)
goto err_map;
}
+ pxa_rtc->base_psbr = ioremap(pxa_rtc->ress_psbr->start,
+ resource_size(pxa_rtc->ress_psbr));
+ if (!pxa_rtc->base_psbr) {
+ dev_err(&pdev->dev, "Unable to map pxa RTC PSBR I/O memory\n");
+ goto err_map;
+ }
/*
* If the clock divider is uninitialized then reset it to the
* default value to get the 1Hz clock.
@@ -372,7 +429,7 @@ static int __init pxa_rtc_probe(struct platform_device *pdev)
}
device_init_wakeup(dev, 1);
-
+ pxa_rtc_open(dev);
return 0;
err_rtc_reg:
@@ -387,6 +444,9 @@ static int __exit pxa_rtc_remove(struct platform_device *pdev)
{
struct pxa_rtc *pxa_rtc = platform_get_drvdata(pdev);
+ struct device *dev = &pdev->dev;
+ pxa_rtc_release(dev);
+
rtc_device_unregister(pxa_rtc->rtc);
spin_lock_irq(&pxa_rtc->lock);
@@ -444,10 +504,7 @@ static struct platform_driver pxa_rtc_driver = {
static int __init pxa_rtc_init(void)
{
- if (cpu_is_pxa27x() || cpu_is_pxa3xx())
- return platform_driver_probe(&pxa_rtc_driver, pxa_rtc_probe);
-
- return -ENODEV;
+ return platform_driver_probe(&pxa_rtc_driver, pxa_rtc_probe);
}
static void __exit pxa_rtc_exit(void)
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-24 12:44:07 +0000