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Subject[PATCH v2 5/9] rtc: pcf2123: let the core handle range offsetting
Date
Set the RTC range properly and use the core windowing and offsetting to
(unfortunately) map back to a 1970-2069 range.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
---
drivers/rtc/rtc-pcf2123.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/rtc/rtc-pcf2123.c b/drivers/rtc/rtc-pcf2123.c
index 7d79180a4292..ba37060f299e 100644
--- a/drivers/rtc/rtc-pcf2123.c
+++ b/drivers/rtc/rtc-pcf2123.c
@@ -194,9 +194,7 @@ static int pcf2123_rtc_read_time(struct device *dev, struct rtc_time *tm)
tm->tm_mday = bcd2bin(rxbuf[3] & 0x3F);
tm->tm_wday = rxbuf[4] & 0x07;
tm->tm_mon = bcd2bin(rxbuf[5] & 0x1F) - 1; /* rtc mn 1-12 */
- tm->tm_year = bcd2bin(rxbuf[6]);
- if (tm->tm_year < 70)
- tm->tm_year += 100; /* assume we are in 1970...2069 */
+ tm->tm_year = bcd2bin(rxbuf[6]) + 100;

dev_dbg(dev, "%s: tm is %ptR\n", __func__, tm);

@@ -223,7 +221,7 @@ static int pcf2123_rtc_set_time(struct device *dev, struct rtc_time *tm)
txbuf[3] = bin2bcd(tm->tm_mday & 0x3F);
txbuf[4] = tm->tm_wday & 0x07;
txbuf[5] = bin2bcd((tm->tm_mon + 1) & 0x1F); /* rtc mn 1-12 */
- txbuf[6] = bin2bcd(tm->tm_year < 100 ? tm->tm_year : tm->tm_year - 100);
+ txbuf[6] = bin2bcd(tm->tm_year - 100);

ret = regmap_bulk_write(pcf2123->map, PCF2123_REG_SC, txbuf,
sizeof(txbuf));
@@ -431,6 +429,9 @@ static int pcf2123_probe(struct spi_device *spi)
*/
rtc->uie_unsupported = 1;
rtc->ops = &pcf2123_rtc_ops;
+ rtc->range_min = RTC_TIMESTAMP_BEGIN_2000;
+ rtc->range_max = RTC_TIMESTAMP_END_2099;
+ rtc->set_start_time = true;

ret = rtc_register_device(rtc);
if (ret)
--
2.21.0
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