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https://github.com/Telecominfraproject/OpenCellular.git
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d83f42bdc8
This reduces memory / code size, and gets rid of ifdefs in temp_sensor.c.
BUG=chrome-os-partner:15714
BRANCH=none
TEST=boot system and run 'ectool temps all' every few seconds
- ectool temps all
The numbers should update over time.
Change-Id: Idaac7e6e4cbc1d6689f5d3b607c623a5cc536a4f
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/36940
31 lines
712 B
C
31 lines
712 B
C
/* Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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/* Temperature sensor module for Chrome EC */
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#include "adc.h"
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#include "common.h"
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#include "hooks.h"
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#include "lm4_adc.h"
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/* Initialize temperature reading to a sane value (27 C) */
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static int last_val = 300;
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static void chip_temp_sensor_poll(void)
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{
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last_val = adc_read_channel(ADC_CH_EC_TEMP);
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}
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DECLARE_HOOK(HOOK_SECOND, chip_temp_sensor_poll, HOOK_PRIO_DEFAULT);
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int chip_temp_sensor_get_val(int idx, int *temp_ptr)
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{
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if (last_val == ADC_READ_ERROR)
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return EC_ERROR_UNKNOWN;
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*temp_ptr = last_val;
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return EC_SUCCESS;
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}
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