diff options
Diffstat (limited to 'driver/temp_sensor/tmp432.h')
| -rw-r--r-- | driver/temp_sensor/tmp432.h | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/driver/temp_sensor/tmp432.h b/driver/temp_sensor/tmp432.h new file mode 100644 index 0000000000..acfaf39503 --- /dev/null +++ b/driver/temp_sensor/tmp432.h @@ -0,0 +1,96 @@ +/* Copyright (c) 2013 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. + */ + +/* TMP432 temperature sensor module for Chrome EC */ + +#ifndef __CROS_EC_TEMP_SENSOR_TMP432_H +#define __CROS_EC_TEMP_SENSOR_TMP432_H + +#define TMP432_I2C_ADDR 0x98 /* 7-bit address is 0x4C */ + +#define TMP432_IDX_LOCAL 0 +#define TMP432_IDX_REMOTE1 1 +#define TMP432_IDX_REMOTE2 2 + +/* Chip-specific registers */ +#define TMP432_LOCAL 0x00 +#define TMP432_REMOTE1 0x01 +#define TMP432_STATUS 0x02 +#define TMP432_CONFIGURATION1_R 0x03 +#define TMP432_CONVERSION_RATE_R 0x04 +#define TMP432_LOCAL_HIGH_LIMIT_R 0x05 +#define TMP432_LOCAL_LOW_LIMIT_R 0x06 +#define TMP432_REMOTE1_HIGH_LIMIT_R 0x07 +#define TMP432_REMOTE1_LOW_LIMIT_R 0x08 +#define TMP432_CONFIGURATION1_W 0x09 +#define TMP432_CONVERSION_RATE_W 0x0a +#define TMP432_LOCAL_HIGH_LIMIT_W 0x0b +#define TMP432_LOCAL_LOW_LIMIT_W 0x0c +#define TMP432_REMOTE1_HIGH_LIMIT_W 0x0d +#define TMP432_REMOTE1_LOW_LIMIT_W 0x0e +#define TMP432_ONESHOT 0x0f +#define TMP432_REMOTE1_EXTD 0x10 +#define TMP432_REMOTE1_HIGH_LIMIT_EXTD 0x13 +#define TMP432_REMOTE1_LOW_LIMIT_EXTD 0x14 +#define TMP432_REMOTE2_HIGH_LIMIT_R 0x15 +#define TMP432_REMOTE2_HIGH_LIMIT_W 0x15 +#define TMP432_REMOTE2_LOW_LIMIT_R 0x16 +#define TMP432_REMOTE2_LOW_LIMIT_W 0x16 +#define TMP432_REMOTE2_HIGH_LIMIT_EXTD 0x17 +#define TMP432_REMOTE2_LOW_LIMIT_EXTD 0x18 +#define TMP432_REMOTE1_THERM_LIMIT 0x19 +#define TMP432_REMOTE2_THERM_LIMIT 0x1a +#define TMP432_STATUS_FAULT 0x1b +#define TMP432_CHANNEL_MASK 0x1f +#define TMP432_LOCAL_THERM_LIMIT 0x20 +#define TMP432_THERM_HYSTERESIS 0x21 +#define TMP432_CONSECUTIVE_ALERT 0x22 +#define TMP432_REMOTE2 0x23 +#define TMP432_REMOTE2_EXTD 0x24 +#define TMP432_BETA_RANGE_CH1 0x25 +#define TMP432_BETA_RANGE_CH2 0x26 +#define TMP432_NFACTOR_REMOTE1 0x27 +#define TMP432_NFACTOR_REMOTE2 0x28 +#define TMP432_LOCAL_EXTD 0x29 +#define TMP432_STATUS_LIMIT_HIGH 0x35 +#define TMP432_STATUS_LIMIT_LOW 0x36 +#define TMP432_STATUS_THERM 0x37 +#define TMP432_LOCAL_HIGH_LIMIT_EXTD 0x3d +#define TMP432_LOCAL_LOW_LIMIT_EXTD 0x3e +#define TMP432_CONFIGURATION2_R 0x3f +#define TMP432_CONFIGURATION2_W 0x3f +#define TMP432_RESET_W 0xfc +#define TMP432_DEVICE_ID 0xfd +#define TMP432_MANUFACTURER_ID 0xfe + +/* Config register bits */ +#define TMP432_CONFIG1_TEMP_RANGE (1 << 2) +#define TMP432_CONFIG1_MODE (1 << 5) +#define TMP432_CONFIG1_RUN_L (1 << 6) +#define TMP432_CONFIG1_ALERT_MASK_L (1 << 7) +#define TMP432_CONFIG2_RESISTANCE_CORRECTION (1 << 2) +#define TMP432_CONFIG2_LOCAL_ENABLE (1 << 3) +#define TMP432_CONFIG2_REMOTE1_ENABLE (1 << 4) +#define TMP432_CONFIG2_REMOTE2_ENABLE (1 << 5) + +/* Status register bits */ +#define TMP432_STATUS_TEMP_THERM_ALARM (1 << 1) +#define TMP432_STATUS_OPEN (1 << 2) +#define TMP432_STATUS_TEMP_LOW_ALARM (1 << 3) +#define TMP432_STATUS_TEMP_HIGH_ALARM (1 << 4) +#define TMP432_STATUS_BUSY (1 << 7) + +/** + * Get the last polled value of a sensor. + * + * @param idx Index to read. Idx indicates whether to read die + * temperature or external temperature. + * @param temp_ptr Destination for temperature in K. + * + * @return EC_SUCCESS if successful, non-zero if error. + */ +int tmp432_get_val(int idx, int *temp_ptr); + +#endif /* __CROS_EC_TEMP_SENSOR_TMP432_H */ |