This is a note to let you know that I've just added the patch titled
thermal/drivers/mediatek/lvts_thermal: Use offset threshold for IRQ
to the 6.4-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:
thermal-drivers-mediatek-lvts_thermal-use-offset-thr.patch
and it can be found in the queue-6.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 3e9c49981f84380adda47ae25762ee0039906203
Author: Nícolas F. R. A. Prado <nfraprado@xxxxxxxxxxxxx>
Date: Thu Jul 6 11:37:34 2023 -0400
thermal/drivers/mediatek/lvts_thermal: Use offset threshold for IRQ
[ Upstream commit f79e996c7ed27bb196facbcd1c69ee33631d7051 ]
There are two kinds of temperature monitoring interrupts available:
* High Offset, Low Offset
* Hot, Hot to normal, Cold
The code currently uses the hot/h2n/cold interrupts, however in a way
that doesn't work: the cold threshold is left uninitialized, which
prevents the other thresholds from ever triggering, and the h2n
interrupt is used as the lower threshold, which prevents the hot
interrupt from triggering again after the thresholds are updated by the
thermal framework, since a hot interrupt can only trigger again after
the hot to normal interrupt has been triggered.
But better yet than addressing those issues, is to use the high/low
offset interrupts instead. This way only two thresholds need to be
managed, which have a simpler state machine, making them a better match
to the thermal framework's high and low thresholds.
Fixes: f5f633b18234 ("thermal/drivers/mediatek: Add the Low Voltage Thermal Sensor driver")
Signed-off-by: Nícolas F. R. A. Prado <nfraprado@xxxxxxxxxxxxx>
Reviewed-by: Alexandre Mergnat <amergnat@xxxxxxxxxxxx>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>
Signed-off-by: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20230706153823.201943-4-nfraprado@xxxxxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/thermal/mediatek/lvts_thermal.c b/drivers/thermal/mediatek/lvts_thermal.c
index 64748153d181e..80abd10596d85 100644
--- a/drivers/thermal/mediatek/lvts_thermal.c
+++ b/drivers/thermal/mediatek/lvts_thermal.c
@@ -296,9 +296,9 @@ static int lvts_set_trips(struct thermal_zone_device *tz, int low, int high)
u32 raw_high = lvts_temp_to_raw(high);
/*
- * Hot to normal temperature threshold
+ * Low offset temperature threshold
*
- * LVTS_H2NTHRE
+ * LVTS_OFFSETL
*
* Bits:
*
@@ -307,13 +307,13 @@ static int lvts_set_trips(struct thermal_zone_device *tz, int low, int high)
if (low != -INT_MAX) {
pr_debug("%s: Setting low limit temperature interrupt: %d\n",
thermal_zone_device_type(tz), low);
- writel(raw_low, LVTS_H2NTHRE(base));
+ writel(raw_low, LVTS_OFFSETL(base));
}
/*
- * Hot temperature threshold
+ * High offset temperature threshold
*
- * LVTS_HTHRE
+ * LVTS_OFFSETH
*
* Bits:
*
@@ -321,7 +321,7 @@ static int lvts_set_trips(struct thermal_zone_device *tz, int low, int high)
*/
pr_debug("%s: Setting high limit temperature interrupt: %d\n",
thermal_zone_device_type(tz), high);
- writel(raw_high, LVTS_HTHRE(base));
+ writel(raw_high, LVTS_OFFSETH(base));
return 0;
}
