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| author | Mathias Kresin <dev@kresin.me> | 2016-10-17 20:25:53 +0200 |
|---|---|---|
| committer | Mathias Kresin <dev@kresin.me> | 2016-10-19 19:55:06 +0200 |
| commit | 23e3314cad2afcc5ef2897c247db11218b9df042 (patch) | |
| tree | ef73444ed437ceec3a09e580927bf6780c98a0f1 /target/linux/arc770 | |
| parent | eba84bee4ce518dc509fe51f252c5307dccf3a1c (diff) | |
| download | upstream-23e3314cad2afcc5ef2897c247db11218b9df042.tar.gz upstream-23e3314cad2afcc5ef2897c247db11218b9df042.tar.bz2 upstream-23e3314cad2afcc5ef2897c247db11218b9df042.zip | |
lantiq: fix thermal sensors driver
Read the temperature including the decimale place from the CGU_GPHY1_CR
register.
Decrement the temperature read from the register by 38.0 degree celsius.
The temperature range of the sensor is -38.0 to +154 °C and the register
value 0 is equal to -38.0 °C. This fixes the report of unrealistic
temperatures as seen on all tested boards.
Give the SoC a few milliseconds to get the first temperature value. On
some rare occasions there is no temperature value in the register when
read the first time after activation. This leads to a reported
temperature of -38.0 °C on boot.
Only version 1.2 of the vr9 SoC has a temperature sensor. Add a check
to make sure the driver doesn't load on v1.1 vr9 SoCs.
Signed-off-by: Mathias Kresin <dev@kresin.me>
Diffstat (limited to 'target/linux/arc770')
0 files changed, 0 insertions, 0 deletions