diff options
| author | Joshua Primero <jprimero@nvidia.com> | 2011-09-08 16:23:22 -0700 |
|---|---|---|
| committer | Rohan Somvanshi <rsomvanshi@nvidia.com> | 2011-09-12 08:51:01 -0700 |
| commit | 2a1664af52c45f8a9278f3454924a09a39541416 (patch) | |
| tree | ea0789d8946b07a68f7cd35ca672aedeb182e584 /drivers | |
| parent | f988c97564f9ecf4b78f4e935e2cfc4ca1b6db0e (diff) | |
arm: tegra: power: Reduced throttling hysteresis
Set different hysteresis values for the EDP and throttling cases.
bug 862301
Change-Id: Ie5a8a02a2123ce5c681e4e59cac77fcf2cbc320e
Reviewed-on: http://git-master/r/51436
Reviewed-by: Rohan Somvanshi <rsomvanshi@nvidia.com>
Tested-by: Rohan Somvanshi <rsomvanshi@nvidia.com>
Diffstat (limited to 'drivers')
| -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 c1875ebeae5c..f0f2fd74e4b3 100644 --- a/drivers/misc/nct1008.c +++ b/drivers/misc/nct1008.c @@ -434,7 +434,8 @@ 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; @@ -446,6 +447,7 @@ 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 = i2c_smbus_read_byte_data(data->client, STATUS_RD); @@ -462,32 +464,37 @@ static void nct1008_work_func(struct work_struct *work) nct1008_disable_alert(data); + + 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; |