ec_driver: Add ADT7481 and TMP411 I2C sensors

Added I2C sensors ADT7481 and TMP411 with config
items and build rules.

BRANCH=none
BUG=
TEST=Define CONFIG_TEMP_SENSOR_ADT7481 or _TMP411
and build board.

Change-Id: I4d1eb55ee56ad3f42787538bb839193e683d0a60
Signed-off-by: Scott Worley <scott.worley@microchip.corp-partner.google.com>

1 files changed, 178 insertions, 0 deletions

diff --git a/driver/temp_sensor/adt7481.h b/driver/temp_sensor/adt7481.h
new file mode 100644
index 0000000000..11e9856b9c
--- /dev/null
+++ b/driver/temp_sensor/adt7481.h
@@ -0,0 +1,178 @@
+/* Copyright 2017 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.
+ */
+
+/* ADT7481 temperature sensor module for Chrome EC */
+
+#ifndef __CROS_EC_ADT7481_H
+#define __CROS_EC_ADT7481_H
+
+#define ADT7481_I2C_ADDR		0x96 /* 7-bit address is 0x4B */
+
+#define ADT7481_IDX_LOCAL	0
+#define ADT7481_IDX_REMOTE1	1
+#define ADT7481_IDX_REMOTE2	2
+
+/* Chip-specific registers */
+#define ADT7481_LOCAL			0x00
+#define ADT7481_REMOTE1			0x01
+#define ADT7481_STATUS1_R		0x02
+#define ADT7481_CONFIGURATION1_R	0x03
+#define ADT7481_CONVERSION_RATE_R	0x04
+#define ADT7481_LOCAL_HIGH_LIMIT_R	0x05
+#define ADT7481_LOCAL_LOW_LIMIT_R	0x06
+#define ADT7481_REMOTE1_HIGH_LIMIT_R	0x07
+#define ADT7481_REMOTE1_LOW_LIMIT_R	0x08
+#define ADT7481_CONFIGURATION1_W	0x09
+#define ADT7481_CONVERSION_RATE_W	0x0a
+#define ADT7481_LOCAL_HIGH_LIMIT_W	0x0b
+#define ADT7481_LOCAL_LOW_LIMIT_W	0x0c
+#define ADT7481_REMOTE1_HIGH_LIMIT_W	0x0d
+#define ADT7481_REMOTE1_LOW_LIMIT_W	0x0e
+#define ADT7481_ONESHOT_W		0x0f
+#define ADT7481_REMOTE1_EXTD_R		0x10
+#define ADT7481_REMOTE1_OFFSET		0x11
+#define ADT7481_REMOTE1_OFFSET_EXTD	0x12
+#define ADT7481_REMOTE1_HIGH_LIMIT_EXTD	0x13
+#define ADT7481_REMOTE1_LOW_LIMIT_EXTD	0x14
+#define ADT7481_REMOTE1_THERM_LIMIT	0x19
+#define ADT7481_LOCAL_THERM_LIMIT	0x20
+#define ADT7481_THERM_HYSTERESIS	0x21
+#define ADT7481_CONSECUTIVE_ALERT	0x22
+#define ADT7481_STATUS2_R		0x23
+#define ADT7481_CONFIGURATION2		0x24
+#define ADT7481_REMOTE2			0x30
+#define ADT7481_REMOTE2_HIGH_LIMIT	0x31
+#define ADT7481_REMOTE2_LOW_LIMIT	0x32
+#define ADT7481_REMOTE2_EXTD_R		0x33
+#define ADT7481_REMOTE2_OFFSET		0x34
+#define ADT7481_REMOTE2_OFFSET_EXTD	0x35
+#define ADT7481_REMOTE2_HIGH_LIMIT_EXTD	0x36
+#define ADT7481_REMOTE2_LOW_LIMIT_EXTD	0x37
+#define ADT7481_REMOTE2_THERM_LIMIT	0x39
+#define ADT7481_DEVICE_ID		0x3d
+#define ADT7481_MANUFACTURER_ID		0x3e
+
+/* Config1 register bits */
+#define ADT7481_CONFIG1_REMOTE1_ALERT_MASK	(1 << 0)
+#define ADT7481_CONFIG1_REMOTE2_ALERT_MASK	(1 << 1)
+#define ADT7481_CONFIG1_TEMP_RANGE		(1 << 2)
+#define ADT7481_CONFIG1_SEL_REMOTE2		(1 << 3)
+/* ADT7481_CONFIG1_MODE bit is use to enable THERM mode */
+#define ADT7481_CONFIG1_MODE			(1 << 5)
+#define ADT7481_CONFIG1_RUN_L			(1 << 6)
+/* mask all alerts on ALERT# pin */
+#define ADT7481_CONFIG1_ALERT_MASK_L		(1 << 7)
+
+/* Config2 register bits */
+#define ADT7481_CONFIG2_LOCK			(1 << 7)
+
+/* Conversion Rate/Channel Select Register */
+#define ADT7481_CONV_RATE_MASK		(0x0f)
+#define ADT7481_CONV_RATE_16S		(0x00)
+#define ADT7481_CONV_RATE_8S		(0x01)
+#define ADT7481_CONV_RATE_4S		(0x02)
+#define ADT7481_CONV_RATE_2S		(0x03)
+#define ADT7481_CONV_RATE_1S		(0x04)
+#define ADT7481_CONV_RATE_500MS		(0x05)
+#define ADT7481_CONV_RATE_250MS		(0x06)
+#define ADT7481_CONV_RATE_125MS		(0x07)
+#define ADT7481_CONV_RATE_62500US	(0x08)
+#define ADT7481_CONV_RATE_31250US	(0x09)
+#define ADT7481_CONV_RATE_15500US	(0x0a)
+/* continuous mode 73 ms averaging */
+#define ADT7481_CONV_RATE_73MS_AVE	(0x0b)
+#define ADT7481_CONV_CHAN_SELECT_MASK	(0x30)
+#define ADT7481_CONV_CHAN_SEL_ROUND_ROBIN	(0 << 4)
+#define ADT7481_CONV_CHAN_SEL_LOCAL		(1 << 4)
+#define ADT7481_CONV_CHAN_SEL_REMOTE1		(2 << 4)
+#define ADT7481_CONV_CHAN_SEL_REMOTE2		(3 << 4)
+#define ADT7481_CONV_AVERAGING_L	(1 << 7)
+
+
+/* Status1 register bits */
+#define ADT7481_STATUS1_LOCAL_THERM_ALARM	(1 << 0)
+#define ADT7481_STATUS1_REMOTE1_THERM_ALARM	(1 << 1)
+#define ADT7481_STATUS1_REMOTE1_OPEN		(1 << 2)
+#define ADT7481_STATUS1_REMOTE1_LOW_ALARM	(1 << 3)
+#define ADT7481_STATUS1_REMOTE1_HIGH_ALARM	(1 << 4)
+#define ADT7481_STATUS1_LOCAL_LOW_ALARM		(1 << 5)
+#define ADT7481_STATUS1_LOCAL_HIGH_ALARM	(1 << 6)
+#define ADT7481_STATUS1_BUSY			(1 << 7)
+
+/* Status2 register bits */
+#define ADT7481_STATUS2_ALERT			(1 << 0)
+#define ADT7481_STATUS2_REMOTE2_THERM_ALARM	(1 << 1)
+#define ADT7481_STATUS2_REMOTE2_OPEN		(1 << 2)
+#define ADT7481_STATUS2_REMOTE2_LOW_ALARM	(1 << 3)
+#define ADT7481_STATUS2_REMOTE2_HIGH_ALARM	(1 << 4)
+
+/* Consecutive Alert register */
+#define ADT7481_CONSEC_MASK		(0xf)
+#define ADT7481_CONSEC_1		(0x0)
+#define ADT7481_CONSEC_2		(0x2)
+#define ADT7481_CONSEC_3		(0x6)
+#define ADT7481_CONSEC_4		(0xe)
+#define ADT7481_CONSEC_EN_SCL_TIMEOUT	(1 << 5)
+#define ADT7481_CONSEC_EN_SDA_TIMEOUT	(1 << 6)
+#define ADT7481_CONSEC_MASK_LOCAL_ALERT	(1 << 7)
+
+
+/* Limits */
+#define ADT7481_HYSTERESIS_HIGH_LIMIT	255
+#define ADT7481_HYSTERESIS_LOW_LIMIT	0
+
+enum adt7481_power_state {
+	ADT7481_POWER_OFF = 0,
+	ADT7481_POWER_ON,
+	ADT7481_POWER_COUNT
+};
+
+enum adt7481_channel_id {
+	ADT7481_CHANNEL_LOCAL,
+	ADT7481_CHANNEL_REMOTE1,
+	ADT7481_CHANNEL_REMOTE2,
+
+	ADT7481_CHANNEL_COUNT
+};
+
+/**
+ * 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 adt7481_get_val(int idx, int *temp_ptr);
+
+/**
+ * Power control function of ADT7481 temperature sensor.
+ *
+ * @param power_on	ADT7481_POWER_ON: turn ADT7481 sensor on.
+ *			ADT7481_POWER_OFF: shut ADT7481 sensor down.
+ *
+ * @return EC_SUCCESS if successful, non-zero if error.
+ */
+int adt7481_set_power(enum adt7481_power_state power_on);
+
+/*
+ * Set ADT7481 ALERT#/THERM2# pin to THERM mode, and give a limit
+ * for a specific channel.
+ *
+ * @param channel	specific a channel
+ *
+ * @param limit_c	High limit temperature, default: 85C
+ *
+ * @param hysteresis	Hysteresis temperature, default: 10C
+ *			All channels share the same hysteresis
+ *
+ * In THERM mode, ALERT# pin will trigger(Low) by itself when any
+ * channel's temperature is greater( >= )than channel's limit_c,
+ * and release(High) by itself when channel's temperature is lower
+ * than (limit_c - hysteresis)
+ */
+int adt7481_set_therm_limit(int channel, int limit_c, int hysteresis);
+#endif /* __CROS_EC_ADT7481_H */