drivers/sensor: Add basic Silabs Si7210 support

This adds basic support for the Silabs Si7210 hall effect magnetic
position and temperature sensor. It is able to get magnetic field and
temperature in the default scale of the sensor (depending on the
variant). It also supports going into sleep mode without measurements
through the device power management infrastructure.

It is most notably missing support for scale change, measurement
averaging and filtering, and alert pin configuration (threshold,
hysteris, tamper).

Signed-off-by: Aurelien Jarno <[email protected]>

Author: aurel32

drivers/sensor/CMakeLists.txt

@@ -80,6 +80,7 @@ add_subdirectory_ifdef(CONFIG_SHT4X		sht4x)
 add_subdirectory_ifdef(CONFIG_SI7006		si7006)
 add_subdirectory_ifdef(CONFIG_SI7055		si7055)
 add_subdirectory_ifdef(CONFIG_SI7060		si7060)
+add_subdirectory_ifdef(CONFIG_SI7210		si7210)
 add_subdirectory_ifdef(CONFIG_SM351LT		sm351lt)
 add_subdirectory_ifdef(CONFIG_HAS_STMEMSC	stmemsc)
 add_subdirectory_ifdef(CONFIG_STM32_TEMP	stm32_temp)

drivers/sensor/Kconfig

@@ -200,6 +200,8 @@ source "drivers/sensor/si7055/Kconfig"
 
 source "drivers/sensor/si7060/Kconfig"
 
+source "drivers/sensor/si7210/Kconfig"
+
 source "drivers/sensor/sm351lt/Kconfig"
 
 source "drivers/sensor/stm32_temp/Kconfig"

drivers/sensor/si7210/CMakeLists.txt

@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: Apache-2.0
+
+zephyr_library()
+
+zephyr_library_sources(si7210.c)

drivers/sensor/si7210/Kconfig

@@ -0,0 +1,9 @@
+# Si7210 Hall Effect Magnetic Position and Temperature Sensor configuration options
+# Copyright (c) 2019 Actinius
+# SPDX-License-Identifier: Apache-2.0
+
+config SI7210
+	bool "Si7210 Hall Effect Magnetic Position and Temperature Sensor"
+	depends on I2C
+	help
+	  Enable driver for Si7210 Hall Effect Magnetic Position and Temperature Sensor.