Hi Daniel,
On 1/25/23 11:58, Daniel Lezcano wrote:
On 25/01/2023 10:50, Amjad Ouled-Ameur wrote:
In mtk_thermal_bank_temperature, return -EAGAIN instead of 0
on the first read of sensor that often are bogus values.
Signed-off-by: Michael Kao <michael.kao@xxxxxxxxxxxx>
Signed-off-by: Hsin-Yi Wang <hsinyi@xxxxxxxxxxxx>
Signed-off-by: Amjad Ouled-Ameur <aouledameur@xxxxxxxxxxxx>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>
---
drivers/thermal/mtk_thermal.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/thermal/mtk_thermal.c b/drivers/thermal/mtk_thermal.c
index b8e06f6c7c42..e7be450cd40a 100644
--- a/drivers/thermal/mtk_thermal.c
+++ b/drivers/thermal/mtk_thermal.c
@@ -736,7 +736,7 @@ static int mtk_thermal_bank_temperature(struct mtk_thermal_bank *bank)
* not immediately shut down.
*/
if (temp > 200000)
- temp = 0;
+ temp = -EAGAIN;
Did you try to add a delay between the bank init and the thermal zone device register (eg. 1ms) ?
May be the HW did not have time to initialize and capture a temperature before thermal_zone_device_register() is called (this one calls get_temp) ?
A delay of 29 ms actually fixed the issue, thanks for the suggestion. I can send a V9 with this improvement.
Is there anything else to fix perhaps ?
Regards,
Amjad
if (temp > max)
max = temp;
