KXJT9 Accelerometer driver from the Motorola Moto Z MDK

drivers/sensors/Kconfig

@@ -25,6 +25,19 @@ config BMP180
 	---help---
 		Enable driver support for the Bosch BMP180 barometer sensor.
 
+config SENSOR_KXTJ9
+	bool "Kionix KXTJ9 Accelerometer support"
+	default n
+	select I2C
+
+if SENSOR_KXTJ9
+
+config SENSOR_KXTJ9_I2C_BUS_SPEED
+	int "Kionix KXTJ9 Bus Speed in Hz"
+	default 400000
+
+endif # SENSOR_KXTJ9
+
 config LIS331DL
 	bool "ST LIS331DL device support"
 	default n

drivers/sensors/Make.defs

@@ -49,6 +49,10 @@ ifeq ($(CONFIG_AS5048B),y)
   CSRCS += as5048b.c
 endif
 
+ifeq ($(CONFIG_SENSOR_KXTJ9),y)
+  CSRCS += kxjt9.c
+endif
+
 ifeq ($(CONFIG_LIS331DL),y)
   CSRCS += lis331dl.c
 endif

include/nuttx/sensors/kxjt9.h

@@ -0,0 +1,128 @@
+/****************************************************************************
+ * include/nuttx/sensors/kxjt9.h
+ *
+ *   Copyright (C) 2016 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * This driver derives from the Motorola Moto Z MDK:
+ *
+ *   Copyright (c) 2016 Motorola Mobility, LLC.
+ *   All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. Neither the name of the copyright holder nor the names of its
+ *    contributors may be used to endorse or promote products derived from this
+ *    software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+#ifndef __INCLUDE_NUTTX_SENSORS_KXJT9_H
+#define __INCLUDE_NUTTX_SENSORS_KXJT9_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#include <stdint.h>
+#include <nuttx/fs/ioctl.h>
+
+#if defined(CONFIG_I2C) && defined(CONFIG_SENSOR_KXTJ9)
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+/* IOCTL Commands ***********************************************************/
+
+#define SNIOC_ENABLE      _SNIOC(0x0001) /* Arg: None */
+#define SNIOC_DISABLE     _SNIOC(0x0002) /* Arg: None */
+#define SNIOC_CONFIGURE   _SNIOC(0x0003) /* Arg: enum kxtj9_odr_e value */
+
+/****************************************************************************
+ * Public Types
+ ****************************************************************************/
+
+/* Data control register bits */
+
+enum kxtj9_odr_e
+{
+  ODR0_781F  = 8,
+  ODR1_563F  = 9,
+  ODR3_125F  = 10,
+  ODR6_25F   = 11,
+  ODR12_5F   = 0,
+  ODR25F     = 1,
+  ODR50F     = 2,
+  ODR100F    = 3,
+  ODR200F    = 4,
+  ODR400F    = 5,
+  ODR800F    = 6
+};
+
+/* Data returned by reading from the KXTJ9 is returned in this format.
+ * In order for the read to be successful, a buffer of size >= sizeof(struct
+ * kxtj9_sensor_data) must be provided with the read.
+ */
+
+struct kxtj9_sensor_data
+{
+  uint16_t x;
+  uint16_t y;
+  uint16_t z;
+};
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+/****************************************************************************
+ * Name: kxjt9_register
+ *
+ * Description:
+ *   Register the KXJT9 accelerometer device as 'devpath'.
+ *
+ * Input Parameters:
+ *   devpath - The full path to the driver to register, e.g., "/dev/accel0".
+ *   i2c     - An I2C driver instance.
+ *   addr    - The I2C address of the KXJT9 accelerometer, gyroscope or
+ *             magnetometer.
+ *
+ * Returned Value:
+ *   Zero (OK) on success; a negated errno value on failure.
+ *
+ ****************************************************************************/
+
+struct i2c_master_s;
+int kxjt9_register(FAR const char *devpath, FAR struct i2c_master_s *i2c,
+                   uint8_t address);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* CONFIG_I2C && CONFIG_SENSOR_KXTJ9 */
+#endif /* __INCLUDE_NUTTX_SENSORS_KXJT9_H */