This is a note to let you know that I've just added the patch titled
rtc: ab-eoz9: don't fail temperature reads on undervoltage notification
to the 6.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
rtc-ab-eoz9-don-t-fail-temperature-reads-on-undervol.patch
and it can be found in the queue-6.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit a72d820e3be56559efc294f0fd38c36cc6bd19d8
Author: Maxime Chevallier <maxime.chevallier@xxxxxxxxxxx>
Date: Fri Nov 22 11:10:30 2024 +0100
rtc: ab-eoz9: don't fail temperature reads on undervoltage notification
[ Upstream commit e0779a0dcf41a6452ac0a169cd96863feb5787c7 ]
The undervoltage flags reported by the RTC are useful to know if the
time and date are reliable after a reboot. Although the threshold VLOW1
indicates that the thermometer has been shutdown and time compensation
is off, it doesn't mean that the temperature readout is currently
impossible.
As the system is running, the RTC voltage is now fully established and
we can read the temperature.
Fixes: 67075b63cce2 ("rtc: add AB-RTCMC-32.768kHz-EOZ9 RTC support")
Signed-off-by: Maxime Chevallier <maxime.chevallier@xxxxxxxxxxx>
Link: https://lore.kernel.org/r/20241122101031.68916-3-maxime.chevallier@xxxxxxxxxxx
Signed-off-by: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/rtc/rtc-ab-eoz9.c b/drivers/rtc/rtc-ab-eoz9.c
index 2f8deb8c4cd3e..da710a29e9620 100644
--- a/drivers/rtc/rtc-ab-eoz9.c
+++ b/drivers/rtc/rtc-ab-eoz9.c
@@ -396,13 +396,6 @@ static int abeoz9z3_temp_read(struct device *dev,
if (ret < 0)
return ret;
- if ((val & ABEOZ9_REG_CTRL_STATUS_V1F) ||
- (val & ABEOZ9_REG_CTRL_STATUS_V2F)) {
- dev_err(dev,
- "thermometer might be disabled due to low voltage\n");
- return -EINVAL;
- }
-
switch (attr) {
case hwmon_temp_input:
ret = regmap_read(regmap, ABEOZ9_REG_REG_TEMP, &val);
