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/* 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 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_AP, 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;
}
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