The datasheet states that 4052 is the maximum value for year. However, the
mpc5121 read_time and set_time function abuse the target time register
instead of using the broken down time so it is limited to 2106.
Signed-off-by: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxx>
---
drivers/rtc/rtc-mpc5121.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/rtc/rtc-mpc5121.c b/drivers/rtc/rtc-mpc5121.c
index 845212fd1e33..5507f1847f7c 100644
--- a/drivers/rtc/rtc-mpc5121.c
+++ b/drivers/rtc/rtc-mpc5121.c
@@ -352,6 +352,8 @@ static int mpc5121_rtc_probe(struct platform_device *op)
rtc->rtc->ops = &mpc5200_rtc_ops;
rtc->rtc->uie_unsupported = 1;
+ rtc->rtc->range_min = RTC_TIMESTAMP_BEGIN_0000;
+ rtc->rtc->range_max = 65733206399ULL; /* 4052-12-31 23:59:59 */
if (of_device_is_compatible(op->dev.of_node, "fsl,mpc5121-rtc")) {
u32 ka;
@@ -362,6 +364,13 @@ static int mpc5121_rtc_probe(struct platform_device *op)
out_be32(&rtc->regs->keep_alive, ka);
}
rtc->rtc->ops = &mpc5121_rtc_ops;
+ /*
+ * This is a limitation of the driver that abuses the target
+ * time register, the actual maximum year for the mpc5121 is
+ * also 4052.
+ */
+ rtc->rtc->range_min = 0;
+ rtc->rtc->range_max = U32_MAX;
}
err = rtc_register_device(rtc->rtc);
--
2.24.1
