drivers: sensor: Add TMP116

Added driver for TI's TMP116. This driver does not use the Alert
functionality.

Signed-off-by: Ioannis Konstantelias <ikonstadel@gmail.com>

drivers/sensor/CMakeLists.txt

@@ -55,6 +55,7 @@ add_subdirectory_ifdef(CONFIG_SX9500		sx9500)
 add_subdirectory_ifdef(CONFIG_TH02		    th02)
 add_subdirectory_ifdef(CONFIG_TMP007		tmp007)
 add_subdirectory_ifdef(CONFIG_TMP112		tmp112)
+add_subdirectory_ifdef(CONFIG_TMP116		tmp116)
 add_subdirectory_ifdef(CONFIG_VL53L0X		vl53l0x)
 
 zephyr_sources_ifdef(CONFIG_USERSPACE sensor_handlers.c)

drivers/sensor/Kconfig

@@ -135,6 +135,8 @@ source "drivers/sensor/tmp007/Kconfig"
 
 source "drivers/sensor/tmp112/Kconfig"
 
+source "drivers/sensor/tmp116/Kconfig"
+
 source "drivers/sensor/vl53l0x/Kconfig"
 
 endif # SENSOR

drivers/sensor/tmp116/CMakeLists.txt

@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: Apache-2.0
+
+zephyr_library()
+
+zephyr_library_sources_ifdef(CONFIG_TMP116 tmp116.c)

drivers/sensor/tmp116/Kconfig

@@ -0,0 +1,13 @@
+# Kconfig - TMP116 temperature sensor configuration options
+
+#
+# Copyright (c) 2019 Centaur Analytics, Inc
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+menuconfig TMP116
+	bool "TMP116 Temperature Sensor"
+	depends on I2C && HAS_DTS_I2C
+	help
+	  Enable driver for TMP116 temperature sensor.

drivers/sensor/tmp116/tmp116.c

@@ -0,0 +1,145 @@
+/*
+ * Copyright (c) 2019 Centaur Analytics, Inc
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <device.h>
+#include <drivers/i2c.h>
+#include <drivers/sensor.h>
+#include <misc/util.h>
+#include <misc/byteorder.h>
+#include <misc/__assert.h>
+#include <logging/log.h>
+#include <kernel.h>
+
+#include "tmp116.h"
+
+#define LOG_LEVEL CONFIG_SENSOR_LOG_LEVEL
+LOG_MODULE_REGISTER(TMP116);
+
+static int tmp116_reg_read(struct device *dev, u8_t reg, u16_t *val)
+{
+	struct tmp116_data *drv_data = dev->driver_data;
+	const struct tmp116_dev_config *cfg = dev->config->config_info;
+
+	if (i2c_burst_read(drv_data->i2c, cfg->i2c_addr, reg, (u8_t *)val, 2)
+	    < 0) {
+		return -EIO;
+	}
+
+	*val = sys_be16_to_cpu(*val);
+
+	return 0;
+}
+
+/**
+ * @brief Check the Device ID
+ *
+ * @param[in]   dev     Pointer to the device structure
+ *
+ * @retval 0 On success
+ * @retval -EIO Otherwise
+ */
+static inline int tmp116_device_id_check(struct device *dev)
+{
+	u16_t value;
+
+	if (tmp116_reg_read(dev, TMP116_REG_DEVICE_ID, &value) != 0) {
+		LOG_ERR("%s: Failed to get Device ID register!",
+			DT_INST_0_TI_TMP116_LABEL);
+		return -EIO;
+	}
+
+	if (value != TMP116_DEVICE_ID) {
+		LOG_ERR("%s: Failed to match the device IDs!",
+			DT_INST_0_TI_TMP116_LABEL);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int tmp116_sample_fetch(struct device *dev, enum sensor_channel chan)
+{
+	struct tmp116_data *drv_data = dev->driver_data;
+	u16_t value;
+	int rc;
+
+	__ASSERT_NO_MSG(chan == SENSOR_CHAN_ALL ||
+			chan == SENSOR_CHAN_AMBIENT_TEMP);
+
+	/* clear sensor values */
+	drv_data->sample = 0U;
+
+	/* Get the most recent temperature measurement */
+	rc = tmp116_reg_read(dev, TMP116_REG_TEMP, &value);
+	if (rc < 0) {
+		LOG_ERR("%s: Failed to read from TEMP register!",
+			DT_INST_0_TI_TMP116_LABEL);
+		return rc;
+	}
+
+	/* store measurements to the driver */
+	drv_data->sample = (s16_t)value;
+
+	return 0;
+}
+
+static int tmp116_channel_get(struct device *dev, enum sensor_channel chan,
+			      struct sensor_value *val)
+{
+	struct tmp116_data *drv_data = dev->driver_data;
+	s32_t tmp;
+
+	if (chan != SENSOR_CHAN_AMBIENT_TEMP) {
+		return -ENOTSUP;
+	}
+
+	/*
+	 * See datasheet "Temperature Results and Limits" section for more
+	 * details on processing sample data.
+	 */
+	tmp = (s32_t)drv_data->sample * TMP116_RESOLUTION;
+	val->val1 = tmp / 10000000; /* Tens of uCelsius */
+	val->val2 = tmp % 10000000;
+
+	return 0;
+}
+
+static const struct sensor_driver_api tmp116_driver_api = {
+	.sample_fetch = tmp116_sample_fetch,
+	.channel_get = tmp116_channel_get
+};
+
+static int tmp116_init(struct device *dev)
+{
+	struct tmp116_data *drv_data = dev->driver_data;
+	int rc;
+
+	/* Bind to the I2C bus that the sensor is connected */
+	drv_data->i2c = device_get_binding(DT_INST_0_TI_TMP116_BUS_NAME);
+	if (!drv_data->i2c) {
+		LOG_ERR("Cannot bind to %s device!",
+			DT_INST_0_TI_TMP116_BUS_NAME);
+		return -EINVAL;
+	}
+
+	/* Check the Device ID */
+	rc = tmp116_device_id_check(dev);
+	if (rc < 0) {
+		return rc;
+	}
+
+	return 0;
+}
+
+static struct tmp116_data tmp116_data;
+
+static const struct tmp116_dev_config tmp116_config = {
+	.i2c_addr = DT_INST_0_TI_TMP116_BASE_ADDRESS,
+};
+
+DEVICE_AND_API_INIT(hdc1080, DT_INST_0_TI_TMP116_LABEL, tmp116_init,
+		    &tmp116_data, &tmp116_config, POST_KERNEL,
+		    CONFIG_SENSOR_INIT_PRIORITY, &tmp116_driver_api);

drivers/sensor/tmp116/tmp116.h

@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2019 Centaur Analytics, Inc
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#ifndef ZEPHYR_DRIVERS_SENSOR_TMP116_TMP116_H_
+#define ZEPHYR_DRIVERS_SENSOR_TMP116_TMP116_H_
+
+#define TMP116_REG_TEMP		0x0
+#define TMP116_REG_CFGR		0x1
+#define TMP116_REG_HIGH_LIM		0x2
+#define TMP116_REG_LOW_LIM		0x3
+#define TMP116_REG_EEPROM_UL		0x4
+#define TMP116_REG_EEPROM1		0x5
+#define TMP116_REG_EEPROM2		0x6
+#define TMP116_REG_EEPROM3		0x7
+#define TMP116_REG_EEPROM4		0x8
+#define TMP116_REG_DEVICE_ID		0xF
+
+#define TMP116_RESOLUTION		78125       /* in tens of uCelsius*/
+#define TMP116_RESOLUTION_DIV		10000000
+
+#define TMP116_DEVICE_ID		0x1116
+
+struct tmp116_data {
+	struct device *i2c;
+	u16_t sample;
+};
+
+struct tmp116_dev_config {
+	u16_t i2c_addr;
+};
+
+#endif /*  ZEPHYR_DRIVERS_SENSOR_TMP116_TMP116_H_ */

tests/drivers/build_all/dts_fixup.h

@@ -258,6 +258,13 @@
 #define DT_INST_0_TI_HDC_BASE_ADDRESS 0
 #endif
 
+#ifndef DT_INST_0_TI_TMP116_LABEL
+#define DT_INST_0_TI_TMP116_LABEL ""
+#define DT_INST_0_TI_TMP116_BASE_ADDRESS 0
+#define DT_INST_0_TI_TMP116_BUS_NAME ""
+#define DT_TI_TMP116_BUS_I2C 1
+#endif
+
 #endif /* CONFIG_HAS_DTS_I2C */
 
 #ifndef DT_ADXL372_DEV_NAME

tests/drivers/build_all/sensors_i_z.conf

@@ -32,4 +32,5 @@ CONFIG_TH02=y
 CONFIG_TI_HDC=y
 CONFIG_TMP007=y
 CONFIG_TMP112=y
+CONFIG_TMP116=y
 CONFIG_VL53L0X=y