iwlwifi: Temperature sensor voltage reading for 5150

The temperature measurement by uCode for 5150 and 5000 are different
        CSR_HW_REV_TYPE_5150: temperature sensor output voltage
        CSR_HW_REV_TYPE_5000: temperature in Celsius
temperature related operation for 5150 is measured by temperature sensor
output voltage; additional conversion is required for set and store
the temperature.

To make sure support different HW design; implement _ops method for
temperature related functions (temperature reading and set ct kill
threshold)

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-5000-hw.h b/drivers/net/wireless/iwlwifi/iwl-5000-hw.h
index 15cac70e36e2..4ef6804a455a 100644
--- a/drivers/net/wireless/iwlwifi/iwl-5000-hw.h
+++ b/drivers/net/wireless/iwlwifi/iwl-5000-hw.h
@@ -87,6 +87,18 @@
 #define IWL50_NUM_AMPDU_QUEUES            10
 #define IWL50_FIRST_AMPDU_QUEUE           10
 
+/* 5150 only */
+#define IWL_5150_VOLTAGE_TO_TEMPERATURE_COEFF   (-5)
+
+static inline s32 iwl_temp_calib_to_offset(struct iwl_priv *priv)
+{
+        u16 *temp_calib = (u16 *)iwl_eeprom_query_addr(priv,
+                                                       EEPROM_5000_TEMPERATURE);
+        /* offset =  temperature -  voltage / coef */
+        s32 offset = (s32)(temp_calib[0] - temp_calib[1] / IWL_5150_VOLTAGE_TO_TEMPERATURE_COEFF);
+        return offset;
+}
+
 /* Fixed (non-configurable) rx data from phy */
 
 /**