diff options
| author | Joshua Primero <jprimero@nvidia.com> | 2011-09-08 16:23:22 -0700 |
|---|---|---|
| committer | Dan Willemsen <dwillemsen@nvidia.com> | 2011-11-30 21:49:50 -0800 |
| commit | fd3237e589268b87c7bffa362472632fdae4c449 (patch) | |
| tree | 34eb58114a7fb75165d3f8fc919a1ef6c8133d49 /drivers/misc | |
| parent | c57bc1998691279b15ddd831c5bb0b7d475c1aa1 (diff) | |
arm: tegra: power: Reduced throttling hysteresis
Set different hysteresis values for the EDP and throttling cases.
bug 862301
(cherry picked from commit 357e8bcd3df61ff2803049e38e8a99dfbcaee99b)
Change-Id: I6cb3ea9bf7f9e288e2b1481862b8aee214ca853f
Reviewed-on: http://git-master/r/62569
Reviewed-by: Joshua Primero <jprimero@nvidia.com>
Tested-by: Joshua Primero <jprimero@nvidia.com>
Reviewed-by: Diwakar Tundlam <dtundlam@nvidia.com>
Rebase-Id: Rfd9c2c7990606c4ed0a10f534a15d2d589327d53
Diffstat (limited to 'drivers/misc')
| -rw-r--r-- | drivers/misc/nct1008.c | 31 |
1 files changed, 19 insertions, 12 deletions
diff --git a/drivers/misc/nct1008.c b/drivers/misc/nct1008.c index 0a56485d5ae6..54c8c43d2330 100644 --- a/drivers/misc/nct1008.c +++ b/drivers/misc/nct1008.c @@ -553,7 +553,8 @@ static void therm_throttle(struct nct1008_data *data, bool enable) } } -#define ALERT_HYSTERESIS 3 +#define ALERT_HYSTERESIS_THROTTLE 1 +#define ALERT_HYSTERESIS_EDP 3 static int edp_thermal_zone_val = -1; static int current_hi_limit = -1; static int current_lo_limit = -1; @@ -565,6 +566,7 @@ static void nct1008_work_func(struct work_struct *work) bool extended_range = data->plat_data.ext_range; u8 temperature, value; int err = 0, i; + int hysteresis; int nentries = data->limits_sz; int lo_limit = 0, hi_limit = 0; int intr_status; @@ -594,32 +596,37 @@ static void nct1008_work_func(struct work_struct *work) return; } + + hysteresis = ALERT_HYSTERESIS_EDP; + + if (temperature >= data->plat_data.throttling_ext_limit) { + /* start throttling */ + therm_throttle(data, true); + hysteresis = ALERT_HYSTERESIS_THROTTLE; + } else if (temperature <= + (data->plat_data.throttling_ext_limit - + ALERT_HYSTERESIS_THROTTLE)) { + /* switch off throttling */ + therm_throttle(data, false); + } + if (temperature < data->limits[0]) { lo_limit = 0; hi_limit = data->limits[0]; } else if (temperature >= data->limits[nentries-1]) { - lo_limit = data->limits[nentries-1] - ALERT_HYSTERESIS; + lo_limit = data->limits[nentries-1] - hysteresis; hi_limit = data->plat_data.shutdown_ext_limit; } else { for (i = 0; (i + 1) < nentries; i++) { if (temperature >= data->limits[i] && temperature < data->limits[i + 1]) { - lo_limit = data->limits[i] - ALERT_HYSTERESIS; + lo_limit = data->limits[i] - hysteresis; hi_limit = data->limits[i + 1]; break; } } } - 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; |