From: Tomas Winkler <tomas.winkler@xxxxxxxxx>
This patch adds computation of ct kill threshold
for 5150. Threshold is computed from calibration
data in the EEPROM.
Signed-off-by: Tomas Winkler <tomas.winkler@xxxxxxxxx>
Signed-off-by: Reinette Chatre <reinette.chatre@xxxxxxxxx>
---
drivers/net/wireless/iwlwifi/iwl-5000.c | 13 ++++++++++++-
drivers/net/wireless/iwlwifi/iwl-eeprom.h | 1 +
2 files changed, 13 insertions(+), 1 deletions(-)
diff --git a/drivers/net/wireless/iwlwifi/iwl-5000.c b/drivers/net/wireless/iwlwifi/iwl-5000.c
index c1e7a42..26e04ec 100644
--- a/drivers/net/wireless/iwlwifi/iwl-5000.c
+++ b/drivers/net/wireless/iwlwifi/iwl-5000.c
@@ -426,6 +426,17 @@ static const u8 *iwl5000_eeprom_query_addr(const struct iwl_priv *priv,
return &priv->eeprom[address];
}
+static s32 iwl5150_get_ct_threshold(struct iwl_priv *priv)
+{
+ const s32 volt2temp_coef = -5;
+ u16 *temp_calib = (u16 *)iwl_eeprom_query_addr(priv,
+ EEPROM_5000_TEMPERATURE);
+ /* offset = temperate - voltage / coef */
+ s32 offset = temp_calib[0] - temp_calib[1] / volt2temp_coef;
+ s32 threshold = (s32)CELSIUS_TO_KELVIN(CT_KILL_THRESHOLD) - offset;
+ return threshold * volt2temp_coef;
+}
+
/*
* Calibration
*/
@@ -859,7 +870,7 @@ static int iwl5000_hw_set_hw_params(struct iwl_priv *priv)
case CSR_HW_REV_TYPE_5150:
/* 5150 wants in Kelvin */
priv->hw_params.ct_kill_threshold =
- CELSIUS_TO_KELVIN(CT_KILL_THRESHOLD);
+ iwl5150_get_ct_threshold(priv);
break;
}
diff --git a/drivers/net/wireless/iwlwifi/iwl-eeprom.h b/drivers/net/wireless/iwlwifi/iwl-eeprom.h
index 997f23c..8f6b05f 100644
--- a/drivers/net/wireless/iwlwifi/iwl-eeprom.h
+++ b/drivers/net/wireless/iwlwifi/iwl-eeprom.h
@@ -147,6 +147,7 @@ struct iwl_eeprom_channel {
/*5000 calibrations */
#define EEPROM_5000_CALIB_ALL (INDIRECT_ADDRESS | INDIRECT_CALIBRATION)
#define EEPROM_5000_XTAL ((2*0x128) | EEPROM_5000_CALIB_ALL)
+#define EEPROM_5000_TEMPERATURE ((2*0x12A) | EEPROM_5000_CALIB_ALL)
/* 5000 links */
#define EEPROM_5000_LINK_HOST (2*0x64)
--
1.5.4.3
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