blob: 93b66f5f3f5bf8b8e03464164c0c6b33a9d8f74a (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
|
/* Copyright 2012 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.
*/
/* Temperature sensor module for Chrome EC */
#include "adc.h"
#include "common.h"
#include "hooks.h"
/* Initialize temperature reading to a valid value (27 C) */
static int last_val = C_TO_K(27);
static void chip_temp_sensor_poll(void)
{
last_val = adc_read_channel(ADC_CH_EC_TEMP);
}
DECLARE_HOOK(HOOK_SECOND, chip_temp_sensor_poll, HOOK_PRIO_TEMP_SENSOR);
int chip_temp_sensor_get_val(int idx, int *temp_ptr)
{
if (last_val == ADC_READ_ERROR)
return EC_ERROR_UNKNOWN;
*temp_ptr = last_val;
return EC_SUCCESS;
}
|
