drivers/sensors: Add driver for ST LPS25H pressure sensor

drivers/sensors/Kconfig

@@ -33,11 +33,11 @@ config BMP180
 		Enable driver support for the Bosch BMP180 barometer sensor.
 
 config HTS221
-	bool "ST HTS221 humidity sensor"
+	bool "STMicro HTS221 humidity sensor"
 	default n
 	select I2C
 	---help---
-		Enable driver support for the ST HTS221 humidity sensor.
+		Enable driver support for the STMicro HTS221 humidity sensor.
 
 if HTS221
 
@@ -56,11 +56,11 @@ config HTS221_NPOLLWAITERS
 endif # HTS221
 
 config SENSORS_L3GD20
-	bool "ST L3GD20 Gyroscope Sensor support"
+	bool "STMicro L3GD20 Gyroscope Sensor support"
 	default n
 	select SPI
 	---help---
-		Enable driver support for the ST L3GD20 gyroscope sensor.
+		Enable driver support for the STMicro L3GD20 gyroscope sensor.
 
 config SENSOR_KXTJ9
 	bool "Kionix KXTJ9 Accelerometer support"
@@ -83,7 +83,7 @@ config LIS3DSH
 		Enable driver support for the STMicro LIS3DSH 3-Axis acclerometer.
 
 config LIS331DL
-	bool "ST LIS331DL device support"
+	bool "STMicro LIS331DL device support"
 	default n
 	select I2C
 
@@ -106,6 +106,23 @@ config LSM9DS1_I2C_FREQUENCY
 	range 1 400000
 	depends on SN_LSM9DS1
 
+config LPS25H
+	bool "STMicro LPS25H pressure sensor"
+	default n
+	select I2C
+	---help---
+		Enable driver support for the STMicro LPS25H barometer sensor.
+
+if LPS25H
+
+config DEBUG_LPS25H
+	bool "Debug support for the LPS25H"
+	default n
+	---help---
+		Enables debug features for the LPS25H
+
+endif # LPS25H
+
 config MB7040
 	bool "MaxBotix MB7040 Sonar support"
 	default n
@@ -209,7 +226,7 @@ endif # SENSORS_ADXL345
 config MAX31855
 	bool "Maxim MAX31855 Driver"
 	default n
-        select SPI
+	select SPI
 	---help---
 		Enables support for the MAX31855 driver
 
@@ -229,7 +246,7 @@ config LIS3MDL
 	default n
 	select SPI
 	---help---
-		Enable driver support for the ST LIS3MDL 3-axis magnetometer.
+		Enable driver support for the STMicro LIS3MDL 3-axis magnetometer.
 
 config LM75
 	bool "STMicro LM-75 Temperature Sensor support"

drivers/sensors/Make.defs

@@ -1,7 +1,7 @@
 ############################################################################
 # drivers/sensors/Make.defs
 #
-#   Copyright (C) 2011-2012, 2015-2016 Gregory Nutt. All rights reserved.
+#   Copyright (C) 2011-2012, 2015-2017 Gregory Nutt. All rights reserved.
 #   Author: Gregory Nutt <gnutt@nuttx.org>
 #
 # Redistribution and use in source and binary forms, with or without
@@ -65,6 +65,10 @@ ifeq ($(CONFIG_SN_LSM9DS1),y)
   CSRCS += lsm9ds1.c
 endif
 
+ifeq ($(CONFIG_LPS25H),y)
+  CSRCS += lps25h.c
+endif
+
 ifeq ($(CONFIG_ADXL345_I2C),y)
   CSRCS += adxl345_i2c.c
 endif

drivers/sensors/hts221.c

@@ -178,7 +178,7 @@ static const struct file_operations g_humidityops =
 * Private Functions
 ****************************************************************************/
 
-static int hts221_do_transfer(FAR struct hts221_dev_s *dev,
+static int hts221_do_transfer(FAR struct hts221_dev_s *priv,
                               FAR struct i2c_msg_s *msgv,
                               size_t nmsg)
 {
@@ -187,7 +187,7 @@ static int hts221_do_transfer(FAR struct hts221_dev_s *dev,
 
   for (retries = 0; retries < HTS221_I2C_RETRIES; retries++)
     {
-      ret = I2C_TRANSFER(dev->i2c, msgv, nmsg);
+      ret = I2C_TRANSFER(priv->i2c, msgv, nmsg);
       if (ret >= 0)
         {
           return 0;
@@ -201,7 +201,7 @@ static int hts221_do_transfer(FAR struct hts221_dev_s *dev,
               break;
             }
 
-          ret = up_i2creset(dev->i2c);
+          ret = up_i2creset(priv->i2c);
           if (ret < 0)
             {
               hts221_dbg("up_i2creset failed: %d\n", ret);
@@ -215,51 +215,51 @@ static int hts221_do_transfer(FAR struct hts221_dev_s *dev,
   return ret;
 }
 
-static int32_t hts221_write_reg8(FAR struct hts221_dev_s *dev,
+static int32_t hts221_write_reg8(FAR struct hts221_dev_s *priv,
                                  const uint8_t *command)
 {
   struct i2c_msg_s msgv[2] =
   {
     {
-      .addr   = dev->addr,
+      .addr   = priv->addr,
       .flags  = 0,
       .buffer = (FAR void *)&command[0],
       .length = 1
     },
     {
-      .addr   = dev->addr,
+      .addr   = priv->addr,
       .flags  = I2C_M_NORESTART,
       .buffer = (FAR void *)&command[1],
       .length = 1
     }
   };
 
-  return hts221_do_transfer(dev, msgv, 2);
+  return hts221_do_transfer(priv, msgv, 2);
 }
 
-static int hts221_read_reg(FAR struct hts221_dev_s *dev,
+static int hts221_read_reg(FAR struct hts221_dev_s *priv,
                            FAR const uint8_t *command, FAR uint8_t *value)
 {
   struct i2c_msg_s msgv[2] =
   {
     {
-      .addr   = dev->addr,
+      .addr   = priv->addr,
       .flags  = 0,
       .buffer = (FAR void *)command,
       .length = 1
     },
     {
-      .addr   = dev->addr,
+      .addr   = priv->addr,
       .flags  = I2C_M_READ,
       .buffer = value,
       .length = 1
     }
   };
 
-  return hts221_do_transfer(dev, msgv, 2);
+  return hts221_do_transfer(priv, msgv, 2);
 }
 
-static int hts221_get_id(FAR struct hts221_dev_s *priv, uint8_t * value)
+static int hts221_get_id(FAR struct hts221_dev_s *priv, uint8_t *value)
 {
   int ret = OK;
   uint8_t cmd = HTS221_WHO_AM_I;
@@ -360,7 +360,7 @@ static int hts221_config_ctrl_reg2(FAR struct hts221_dev_s *priv,
 }
 
 static int hts221_config_ctrl_reg1(FAR struct hts221_dev_s *priv,
-                                   FAR hts221_settings_t * settings)
+                                   FAR hts221_settings_t *settings)
 {
   int ret = OK;
   uint8_t regval = 0;
@@ -418,7 +418,7 @@ static int hts221_power_on_off(FAR struct hts221_dev_s *priv, bool on)
 }
 
 static int hts221_config(FAR struct hts221_dev_s *priv,
-                         FAR hts221_settings_t * cfgr)
+                         FAR hts221_settings_t *cfgr)
 {
   int ret = OK;
 
@@ -475,7 +475,7 @@ static int hts221_start_conversion(FAR struct hts221_dev_s *priv)
 }
 
 static int hts221_check_status(FAR struct hts221_dev_s *priv,
-                               FAR hts221_status_t * status)
+                               FAR hts221_status_t *status)
 {
   int ret = OK;
   uint8_t addr = HTS221_STATUS_REG;
@@ -496,7 +496,7 @@ static int hts221_check_status(FAR struct hts221_dev_s *priv,
 }
 
 static int hts221_read_raw_data(FAR struct hts221_dev_s *priv,
-                                FAR hts221_raw_data_t * data)
+                                FAR hts221_raw_data_t *data)
 {
   int ret = OK;
   uint8_t addr_humid_low = HTS221_HUM_OUT_L;

include/nuttx/sensors/ioctl.h

@@ -125,4 +125,12 @@
 #define SNIOC_READ_CONVERT_DATA _SNIOC(0x002f)
 #define SNIOC_DUMP_REGS         _SNIOC(0x0030)
 
+/* IOCTL commands unique to the LPS25H */
+
+#define SNIOC_GET_DEV_ID        _SNIOC(0x0031)
+#define SNIOC_CFGR              _SNIOC(0x0032)
+#define SNIOC_TEMPERATURE_OUT   _SNIOC(0x0033)
+#define SNIOC_PRESSURE_OUT      _SNIOC(0x0034)
+#define SNIOC_SENSOR_OFF        _SNIOC(0x0035)
+
 #endif /* __INCLUDE_NUTTX_SENSORS_IOCTL_H */

include/nuttx/sensors/lps25h.h

@@ -0,0 +1,105 @@
+/****************************************************************************
+ * include/nuttx/sensors/lps25h.h
+ *
+ *   Copyright (C) 2014, 2017 Haltian Ltd. 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 NuttX 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 OWNER 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_NUTT_SENSORS_LPS25H_H
+#define __INCLUDE_NUTT_SENSORS_LPS25H_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/sensors/ioctl.h>
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#define LPS25H_TEMPER_DIVIDER  1000
+
+#define LPS25H_VALID_WHO_AM_I  0xbd
+
+/****************************************************************************
+ * Public Types
+ ****************************************************************************/
+
+typedef struct lps25h_temper_data_s
+{
+  int32_t int_temper;          /* int_temper value must be divided by
+                                * LPS25H_TEMPER_DIVIDER in your app code */
+  int16_t raw_data;
+} lps25h_temper_data_t;
+
+typedef struct lps25h_pressure_data_s
+{
+  uint32_t pressure_int_hP;
+  uint32_t pressure_Pa;
+  uint32_t raw_data;
+} lps25h_pressure_data_t;
+
+typedef struct lps25h_who_am_i_data
+{
+  uint8_t who_am_i;
+} lps25h_who_am_i_data;
+
+typedef struct lps25h_config_s
+{
+  /* Device characterization */
+
+  int irq;                    /* IRQ number received by interrupt handler. */
+
+  /* IRQ/GPIO access callbacks.  These operations all hidden behind callbacks
+   * to isolate the driver from differences in GPIO interrupt handling
+   * by varying boards and MCUs.
+   * irq_attach - Attach the interrupt handler to the GPIO interrupt
+   * irq_enable - Enable or disable the GPIO
+   * irq_clear - Acknowledge/clear any pending GPIO interrupt
+   * set_power - Ask board to turn on regulator
+   */
+
+  CODE int (*irq_attach)(FAR struct lps25h_config_s *state, xcpt_t isr,
+                         FAR void *arg);
+  CODE void (*irq_enable)(FAR const struct lps25h_config_s *state,
+                          bool enable);
+  CODE void (*irq_clear)(FAR const struct lps25h_config_s *state);
+  CODE int (*set_power)(FAR const struct lps25h_config_s *state, bool on);
+} lps25h_config_t;
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+int lps25h_register(FAR const char *devpath, FAR struct i2c_master_s *i2c,
+                    uint8_t addr, FAR lps25h_config_t *config);
+
+#endif /* __INCLUDE_NUTT_SENSORS_LPS25H_H */