drivers/sensors: add INA260

Documentation/components/drivers/special/sensors/ina260.rst

@@ -0,0 +1,55 @@
+======
+INA260
+======
+
+.. tags:: experimental
+
+I2C driver for the Texas Instruments INA260 current/voltage/power monitor.
+
+.. warning::
+   This driver only supports polling mode.
+
+Driver Interface
+================
+
+The driver registers a character device. Each ``read`` returns one or more
+``struct ina260_s`` samples:
+
+.. code-block:: c
+
+   #include <nuttx/sensors/ina260.h>
+
+   struct ina260_s
+   {
+     uint32_t voltage;  /* Bus voltage in millivolts */
+     int32_t  current;  /* Current in milliamperes (signed) */
+     uint32_t power;    /* Power in milliwatts */
+   };
+
+Registration
+============
+
+Register the driver from board-level code:
+
+.. code-block:: c
+
+   #include <nuttx/sensors/ina260.h>
+
+   #if defined(CONFIG_SENSORS_INA260)
+     /* Register INA260 on I2C1 with address 0x40 and default configuration */
+
+     ret = ina260_register("/dev/ina260-0", i2c1, 0x40, 0);
+     if (ret < 0) {
+       syslog(LOG_ERR, "Failed to register INA260: %d\n", ret);
+     }
+
+The last argument to ``ina260_register`` is the configuration. Please refer to
+the datasheet for more details on the configuration options (table 5).
+
+A software reset is issued during registration before applying the
+configuration.
+
+Example
+=======
+
+Please refer to ina260 from nuttx-apps for example code.

drivers/sensors/CMakeLists.txt

@@ -288,6 +288,10 @@ if(CONFIG_SENSORS)
       list(APPEND SRCS ina226.c)
     endif()
 
+    if(CONFIG_SENSORS_INA260)
+      list(APPEND SRCS ina260.c)
+    endif()
+
     if(CONFIG_SENSORS_INA3221)
       list(APPEND SRCS ina3221.c)
     endif()

drivers/sensors/Kconfig

@@ -1119,6 +1119,19 @@ config INA226_I2C_FREQUENCY
 	default 400000
 	depends on SENSORS_INA226
 
+config SENSORS_INA260
+	bool "INA260 current, voltage, and power monitor"
+	default n
+	select I2C
+	---help---
+		Enable driver support for the Texas Instruments INA260 current,
+		voltage, and power monitor with integrated shunt resistor.
+
+config INA260_I2C_FREQUENCY
+	int "INA260 I2C frequency"
+	default 400000
+	depends on SENSORS_INA260
+
 config SENSORS_INA3221
 	bool "INA3221 current and voltage monitor"
 	default n

drivers/sensors/Make.defs

@@ -284,6 +284,10 @@ ifeq ($(CONFIG_SENSORS_INA226),y)
   CSRCS += ina226.c
 endif
 
+ifeq ($(CONFIG_SENSORS_INA260),y)
+  CSRCS += ina260.c
+endif
+
 ifeq ($(CONFIG_SENSORS_INA3221),y)
   CSRCS += ina3221.c
 endif