diff options
| author | Diwakar Tundlam <dtundlam@nvidia.com> | 2011-07-12 00:51:11 -0700 |
|---|---|---|
| committer | Dan Willemsen <dwillemsen@nvidia.com> | 2011-11-30 21:47:34 -0800 |
| commit | 1d143a601d8bafdf749b6fc34ea0b746de44e438 (patch) | |
| tree | ad6cf8953a7c1e3789ac51ce1c5be46a240fe40a /drivers/misc | |
| parent | 860a1ce24675bed1e9b3d588003c94f974493a76 (diff) | |
Arm: Tegra: Tsensor: Added guardbanding to temperatures
Bug 844025
- Guardband to account for hotspot offset and sensor accuracy.
- Throttling point specified independent of EDP, but constrained to be
one of the specified EDP points.
Original-Change-Id: Ic9231ad6887ca282bb520ea23229526ac7a243be
Reviewed-on: http://git-master/r/40566
Reviewed-by: Diwakar Tundlam <dtundlam@nvidia.com>
Tested-by: Diwakar Tundlam <dtundlam@nvidia.com>
Reviewed-by: Bitan Biswas <bbiswas@nvidia.com>
Rebase-Id: Rb582312d40da8f1cc753666bdef6068138358cd0
Diffstat (limited to 'drivers/misc')
| -rw-r--r-- | drivers/misc/nct1008.c | 31 |
1 files changed, 17 insertions, 14 deletions
diff --git a/drivers/misc/nct1008.c b/drivers/misc/nct1008.c index d4a8c1cfa3f9..748697a64ba9 100644 --- a/drivers/misc/nct1008.c +++ b/drivers/misc/nct1008.c @@ -441,7 +441,6 @@ static void nct1008_work_func(struct work_struct *work) int nentries = data->limits_sz; int lo_limit = 0, hi_limit = 0; int intr_status = i2c_smbus_read_byte_data(data->client, STATUS_RD); - bool throttle = false; err = nct1008_get_temp(&data->client->dev, &temperature); if (err) { @@ -461,7 +460,6 @@ static void nct1008_work_func(struct work_struct *work) } else if (temperature >= data->limits[nentries-1]) { lo_limit = data->limits[nentries-1] - ALERT_HYSTERESIS; hi_limit = data->plat_data.shutdown_ext_limit; - throttle = true; } else { for (i = 0; (i + 1) < nentries; i++) { if (temperature >= data->limits[i] && @@ -473,6 +471,15 @@ static void nct1008_work_func(struct work_struct *work) } } + if (temperature >= data->plat_data.throttling_ext_limit) { + /* start throttling */ + therm_throttle(data, true); + } else if (temperature < + (data->plat_data.throttling_ext_limit - ALERT_HYSTERESIS)) { + /* switch off throttling */ + therm_throttle(data, false); + } + if (lo_limit == hi_limit) { err = -ENODATA; goto out; @@ -503,19 +510,12 @@ static void nct1008_work_func(struct work_struct *work) current_hi_limit = hi_limit; } - if (throttle) { - /* start throttling */ - therm_throttle(data, true); - goto out; - } else { - /* switch off throttling */ - therm_throttle(data, false); - } - /* inform edp governor */ if (edp_thermal_zone_val != temperature) - // FIXME: Move this direct tegra_ function call to be called via - // a pointer in 'struct nct1008_data' (like 'alarm_fn') + /* + * FIXME: Move this direct tegra_ function call to be called + * via a pointer in 'struct nct1008_data' (like 'alarm_fn') + */ tegra_edp_update_thermal_zone(temperature); edp_thermal_zone_val = temperature; @@ -629,7 +629,10 @@ static int __devinit nct1008_configure_sensor(struct nct1008_data* data) if (err) goto error; } else { - /* External Temperature Throttling limit */ + /* + * External Temperature Throttling limit: + * Applies when 'Thermal Zones' are not specified. + */ hi_limit = pdata->throttling_ext_limit; } |