iwlagn: use iwl_eeprom_calib_hdr structure

For retrieve calibration hdr related information, instead of using structure in
one place and #define in other place, unify the method to use data structure.
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/iwlwifi/iwl-agn-lib.c

@@ -96,11 +96,7 @@ void iwlagn_temperature(struct iwl_priv *priv)
 
 u16 iwlagn_eeprom_calib_version(struct iwl_priv *priv)
 {
-	struct iwl_eeprom_calib_hdr {
-		u8 version;
-		u8 pa_type;
-		u16 voltage;
-	} *hdr;
+	struct iwl_eeprom_calib_hdr *hdr;
 
 	hdr = (struct iwl_eeprom_calib_hdr *)iwl_eeprom_query_addr(priv,
 							EEPROM_CALIB_ALL);

drivers/net/wireless/iwlwifi/iwl-agn-ucode.c

@@ -185,11 +185,12 @@ static int iwlagn_set_temperature_offset_calib_v2(struct iwl_priv *priv)
 				     EEPROM_KELVIN_TEMPERATURE);
 	__le16 *offset_calib_low =
 		(__le16 *)iwl_eeprom_query_addr(priv, EEPROM_RAW_TEMPERATURE);
-	__le16 *voltage_reading =
-		(__le16 *)iwl_eeprom_query_addr(priv, EEPROM_VOLTAGE_READING);
+	struct iwl_eeprom_calib_hdr *hdr;
 
 	memset(&cmd, 0, sizeof(cmd));
 	iwl_set_calib_hdr(&cmd.hdr, IWL_PHY_CALIBRATE_TEMP_OFFSET_CMD);
+	hdr = (struct iwl_eeprom_calib_hdr *)iwl_eeprom_query_addr(priv,
+							EEPROM_CALIB_ALL);
 	memcpy(&cmd.radio_sensor_offset_high, offset_calib_high,
 		sizeof(offset_calib_high));
 	memcpy(&cmd.radio_sensor_offset_low, offset_calib_low,
@@ -199,8 +200,8 @@ static int iwlagn_set_temperature_offset_calib_v2(struct iwl_priv *priv)
 		cmd.radio_sensor_offset_low = DEFAULT_RADIO_SENSOR_OFFSET;
 		cmd.radio_sensor_offset_high = DEFAULT_RADIO_SENSOR_OFFSET;
 	}
-	memcpy(&cmd.burntVoltageRef, voltage_reading,
-		sizeof(voltage_reading));
+	memcpy(&cmd.burntVoltageRef, &hdr->voltage,
+		sizeof(hdr->voltage));
 
 	IWL_DEBUG_CALIB(priv, "Radio sensor offset high: %d\n",
 			le16_to_cpu(cmd.radio_sensor_offset_high));

drivers/net/wireless/iwlwifi/iwl-eeprom.h

@@ -163,11 +163,16 @@ struct iwl_eeprom_enhanced_txpwr {
 } __packed;
 
 /* calibration */
+struct iwl_eeprom_calib_hdr {
+	u8 version;
+	u8 pa_type;
+	__le16 voltage;
+} __packed;
+
 #define EEPROM_CALIB_ALL	(INDIRECT_ADDRESS | INDIRECT_CALIBRATION)
 #define EEPROM_XTAL		((2*0x128) | EEPROM_CALIB_ALL)
 
 /* temperature */
-#define EEPROM_VOLTAGE_READING		((2*0x1) | EEPROM_CALIB_ALL)
 #define EEPROM_KELVIN_TEMPERATURE	((2*0x12A) | EEPROM_CALIB_ALL)
 #define EEPROM_RAW_TEMPERATURE		((2*0x12B) | EEPROM_CALIB_ALL)