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| author | Keerthy <j-keerthy@ti.com> | 2015-04-22 14:51:42 +0200 |
|---|---|---|
| committer | Eduardo Valentin <edubezval@gmail.com> | 2015-05-09 03:02:29 +0200 |
| commit | e9a90d046b9c9fe8f7c8efefe7b0e64c3c0daa8f (patch) | |
| tree | 5892eedab25e84bf4c96d481a5a8165ecdeb2cec /drivers/thermal/ti-soc-thermal/ti-bandgap.h | |
| parent | thermal: ti-soc-thermal: dra7: Implement Workaround for Errata i814 (diff) | |
| download | linux-e9a90d046b9c9fe8f7c8efefe7b0e64c3c0daa8f.tar.xz linux-e9a90d046b9c9fe8f7c8efefe7b0e64c3c0daa8f.zip | |
thermal: ti-soc-thermal: OMAP5: Implement Workaround for Errata i813
DESCRIPTION
Spurious Thermal Alert: Talert can happen randomly while the device remains
under the temperature limit defined for this event to trig. This spurious
event is caused by a incorrect re-synchronization between clock domains.
The comparison between configured threshold and current temperature value
can happen while the value is transitioning (metastable), thus causing
inappropriate event generation. No spurious event occurs as long as the
threshold value stays unchanged. Spurious event can be generated while a
thermal alert threshold is modified in
CONTROL_BANDGAP_THRESHOLD_MPU/GPU/CORE/DSPEVE/IVA_n.
WORKAROUND
Spurious event generation can be avoided by performing following sequence
when the threshold is modified:
1. Mask the hot/cold events at the thermal IP level.
2. Modify Threshold.
3. Unmask the hot/cold events at the thermal IP level.
Signed-off-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Diffstat (limited to 'drivers/thermal/ti-soc-thermal/ti-bandgap.h')
| -rw-r--r-- | drivers/thermal/ti-soc-thermal/ti-bandgap.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/thermal/ti-soc-thermal/ti-bandgap.h b/drivers/thermal/ti-soc-thermal/ti-bandgap.h index b2da3fc42b51..0c52f7afba00 100644 --- a/drivers/thermal/ti-soc-thermal/ti-bandgap.h +++ b/drivers/thermal/ti-soc-thermal/ti-bandgap.h @@ -320,7 +320,8 @@ struct ti_temp_sensor { * * TI_BANDGAP_FEATURE_ERRATA_814 - used to workaorund when the bandgap device * has Errata 814 - * + * TI_BANDGAP_FEATURE_ERRATA_813 - used to workaorund when the bandgap device + * has Errata 813 * TI_BANDGAP_HAS(b, f) - macro to check if a bandgap device is capable of a * specific feature (above) or not. Return non-zero, if yes. */ @@ -335,6 +336,7 @@ struct ti_temp_sensor { #define TI_BANDGAP_FEATURE_COUNTER_DELAY BIT(8) #define TI_BANDGAP_FEATURE_HISTORY_BUFFER BIT(9) #define TI_BANDGAP_FEATURE_ERRATA_814 BIT(10) +#define TI_BANDGAP_FEATURE_ERRATA_813 BIT(11) #define TI_BANDGAP_HAS(b, f) \ ((b)->conf->features & TI_BANDGAP_FEATURE_ ## f) |