rtc: st-lpc: add range

The RTC has a 64 bit counter.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Acked-by: Patrice Chotard <patrice.chotard@st.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/rtc/rtc-st-lpc.c b/drivers/rtc/rtc-st-lpc.c
index 2f1ef2c28740..bee75ca7ff79 100644
--- a/drivers/rtc/rtc-st-lpc.c
+++ b/drivers/rtc/rtc-st-lpc.c
@@ -258,6 +258,8 @@ static int st_rtc_probe(struct platform_device *pdev)
         platform_set_drvdata(pdev, rtc);
 
         rtc->rtc_dev->ops = &st_rtc_ops;
+        rtc->rtc_dev->range_max = U64_MAX;
+        do_div(rtc->rtc_dev->range_max, rtc->clkrate);
 
         ret = rtc_register_device(rtc->rtc_dev);
         if (ret) {