text: /* Copyright 2016 The Chromium OS Authors. All rights reserved.
   * Use of this source code is governed by a BSD-style license that can be
   * found in the LICENSE file.
   */
  
  /*
   * SB-TSI: SB Temperature Sensor Interface.
   * This is an I2C slave temp sensor on the AMD Stony Ridge FT4 SOC.
   */
  
  #include "chipset.h"
  #include "common.h"
  #include "console.h"
  #include "gpio.h"
  #include "hooks.h"
  #include "i2c.h"
  #include "sb_tsi.h"
  #include "util.h"
  
  static int raw_read8(const int offset, int *data_ptr)
  {
  	return i2c_read8(I2C_PORT_THERMAL, SB_TSI_I2C_ADDR_FLAGS,
  			 offset, data_ptr);
  }
  
  int sb_tsi_get_val(int idx, int *temp_ptr)
  {
  	int ret;
  	/* There is only one temp sensor on the FT4 */
  	if (idx != 0)
  		return EC_ERROR_PARAM1;
  	/* FT4 SB-TSI sensor only powered in S0 */
  	if (!chipset_in_state(CHIPSET_STATE_ON))
  		return EC_ERROR_NOT_POWERED;
  	/* Read the value over I2C */
  	ret = raw_read8(SB_TSI_TEMP_H, temp_ptr);
  	if (ret)
  		return ret;
  	*temp_ptr = C_TO_K(*temp_ptr);
  	return EC_SUCCESS;
  }
  