1 files changed, 35 insertions, 0 deletions
diff --git a/include/adc.h b/include/adc.h
new file mode 100644
index 0000000000..1f01f2c08f
--- /dev/null
+++ b/include/adc.h
@@ -0,0 +1,35 @@
+/* Copyright (c) 2011 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.
+ */
+
+/* ADC interface for Chrome EC */
+
+#ifndef __CROS_EC_ADC_H
+#define __CROS_EC_ADC_H
+
+#include "common.h"
+
+/* Value returned by adc_read_*() methods if the read failed. */
+#define ADC_READ_ERROR -1
+
+/* Minimum and maximum values returned by adc_read(). */
+#define ADC_READ_MIN 0
+#define ADC_READ_MAX 4095
+
+/* ADC channels */
+/* TODO: channel mapping is board-specific */
+enum adc_channel {
+	ADC_CH_POT = 0,
+};
+
+/* Initializes the module. */
+int adc_init(void);
+
+/* Reads an ADC channel.  Returns the ADC value, or ADC_READ_ERROR if error. */
+int adc_read(enum adc_channel ch);
+
+/* Returns the internal EC temperature in K, or ADC_READ_ERROR if error. */
+int adc_read_ec_temperature(void);
+
+#endif  /* __CROS_EC_ADC_H */