rtc: ds1511: implement ds1511_rtc_read_alarm properly

ds1511_rtc_read_alarm was useless as it is only called at boot time so
the alarm members of pdata have not yet been set. Read the actual registers
so there is a chance to get a meaningful value.

Then, drop the alarm related members of pdata as they are not used anymore.

Link: https://lore.kernel.org/r/20240227230431.1837717-10-alexandre.belloni@bootlin.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

diff --git a/drivers/rtc/rtc-ds1511.c b/drivers/rtc/rtc-ds1511.c
index d5d59a9..c3b1376 100644 (file)
--- a/drivers/rtc/rtc-ds1511.c
+++ b/drivers/rtc/rtc-ds1511.c
@@ -63,11 +63,6 @@ struct rtc_plat_data {
        struct rtc_device *rtc;
        void __iomem *ioaddr;           /* virtual base address */
        int irq;
-       unsigned int irqen;
-       int alrm_sec;
-       int alrm_min;
-       int alrm_hour;
-       int alrm_mday;
        spinlock_t lock;
 };
 
@@ -188,18 +183,11 @@ static int ds1511_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
        struct rtc_plat_data *pdata = dev_get_drvdata(dev);
        unsigned long flags;
 
-       pdata->alrm_mday = alrm->time.tm_mday;
-       pdata->alrm_hour = alrm->time.tm_hour;
-       pdata->alrm_min = alrm->time.tm_min;
-       pdata->alrm_sec = alrm->time.tm_sec;
-       if (alrm->enabled)
-               pdata->irqen |= RTC_AF;
-
        spin_lock_irqsave(&pdata->lock, flags);
-       rtc_write(bin2bcd(pdata->alrm_mday) & 0x3f, DS1511_AM4_DATE);
-       rtc_write(bin2bcd(pdata->alrm_hour) & 0x3f, DS1511_AM3_HOUR);
-       rtc_write(bin2bcd(pdata->alrm_min) & 0x7f, DS1511_AM2_MIN);
-       rtc_write(bin2bcd(pdata->alrm_sec) & 0x7f, DS1511_AM1_SEC);
+       rtc_write(bin2bcd(alrm->time.tm_mday) & 0x3f, DS1511_AM4_DATE);
+       rtc_write(bin2bcd(alrm->time.tm_hour) & 0x3f, DS1511_AM3_HOUR);
+       rtc_write(bin2bcd(alrm->time.tm_min) & 0x7f, DS1511_AM2_MIN);
+       rtc_write(bin2bcd(alrm->time.tm_sec) & 0x7f, DS1511_AM1_SEC);
        ds1511_rtc_alarm_enable(alrm->enabled);
 
        rtc_read(DS1511_CONTROL_A);     /* clear interrupts */
@@ -210,13 +198,12 @@ static int ds1511_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
 
 static int ds1511_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
 {
-       struct rtc_plat_data *pdata = dev_get_drvdata(dev);
+       alrm->time.tm_mday = bcd2bin(rtc_read(DS1511_AM4_DATE) & 0x3f);
+       alrm->time.tm_hour = bcd2bin(rtc_read(DS1511_AM3_HOUR) & 0x3f);
+       alrm->time.tm_min = bcd2bin(rtc_read(DS1511_AM2_MIN) & 0x7f);
+       alrm->time.tm_sec = bcd2bin(rtc_read(DS1511_AM1_SEC) & 0x7f);
+       alrm->enabled = !!(rtc_read(DS1511_CONTROL_B) & DS1511_TIE);
 
-       alrm->time.tm_mday = pdata->alrm_mday < 0 ? 0 : pdata->alrm_mday;
-       alrm->time.tm_hour = pdata->alrm_hour < 0 ? 0 : pdata->alrm_hour;
-       alrm->time.tm_min = pdata->alrm_min < 0 ? 0 : pdata->alrm_min;
-       alrm->time.tm_sec = pdata->alrm_sec < 0 ? 0 : pdata->alrm_sec;
-       alrm->enabled = (pdata->irqen & RTC_AF) ? 1 : 0;
        return 0;
 }