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/* Copyright (c) 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.
*/
/* LM4-specific ADC module for Chrome EC */
#ifndef __CROS_EC_LM4_ADC_H
#define __CROS_EC_LM4_ADC_H
enum lm4_adc_sequencer
{
LM4_ADC_SEQ0 = 0,
LM4_ADC_SEQ1,
LM4_ADC_SEQ2,
LM4_ADC_SEQ3,
LM4_ADC_SEQ_COUNT
};
/* Minimum and maximum values returned by lm4_adc_flush_and_read(). */
#define ADC_READ_MIN 0
#define ADC_READ_MAX 4095
/* Value returned if the read failed. */
#define ADC_READ_ERROR -1
/* Just plain id mapping for code readability */
#define LM4_AIN(x) (x)
/* Dummy value for "channel" in adc_t if we don't have an external channel. */
#define LM4_AIN_NONE (-1)
/* Flush an ADC sequencer and initiate a read. Return raw ADC value. */
int lm4_adc_flush_and_read(enum lm4_adc_sequencer);
/* Configure an ADC sequencer to be dedicated for an ADC input "ain_id".
* Value in "ssctl" field is passed to sampler sequencer control register.
*/
int lm4_adc_configure(enum lm4_adc_sequencer, int ain_id, int ssctl);
#endif /* __CROS_EC_LM4_ADC_H */
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