power: add driver for TI bq2429x battery charger. TODO: Untested. Does not have poll() support.

drivers/power/Kconfig

@@ -292,6 +292,25 @@ config BQ2425X
 	---help---
 		The BQ24250/BQ24251 are battery charger for lithium-ion batteries.
 
+config BQ2429X
+	bool "BQ2429X Battery charger support"
+	default n
+	select I2C
+	select I2C_BQ2429X
+	depends on BATTERY_CHARGER
+	---help---
+		The BQ24296/BQ24297/BQ24296M are battery charger for lithium-ion batteries.
+
+if BQ2429X
+
+config DEBUG_BQ2429X
+	bool "BQ2429X Debug Features"
+	default n
+	---help---
+		Enable BQ2429X battery management debug features.
+
+endif # BQ2429X
+
 config BATTERY_GAUGE
 	bool "Battery Fuel Gauge support"
 	default n
@@ -312,6 +331,10 @@ config I2C_BQ2425X
 	bool
 	default y if BQ2425X
 
+config I2C_BQ2429X
+	bool
+	default y if BQ2429X
+
 config I2C_MAX1704X
 	bool
 	default y if MAX1704X

drivers/power/Make.defs

@@ -80,6 +80,12 @@ ifeq ($(CONFIG_I2C_BQ2425X),y)
 CSRCS += bq2425x.c
 endif
 
+# Add the BQ2429x I2C-based battery charger driver
+
+ifeq ($(CONFIG_I2C_BQ2429X),y)
+CSRCS += bq2429x.c
+endif
+
 endif
 
 # Include power support in the build

drivers/power/battery_charger.c

@@ -160,7 +160,7 @@ static int bat_charger_ioctl(FAR struct file *filep, int cmd,
   FAR struct battery_charger_dev_s *dev  = inode->i_private;
   int ret;
 
-  /* Inforce mutually exclusive access to the battery driver */
+  /* Enforce mutually exclusive access to the battery driver */
 
   ret = sem_wait(&dev->batsem);
   if (ret < 0)
@@ -168,7 +168,7 @@ static int bat_charger_ioctl(FAR struct file *filep, int cmd,
       return -errno; /* Probably EINTR */
     }
 
-  /* Procss the IOCTL command */
+  /* Process the IOCTL command */
 
   ret = -EINVAL;  /* Assume a bad argument */
   switch (cmd)
@@ -239,6 +239,16 @@ static int bat_charger_ioctl(FAR struct file *filep, int cmd,
         }
         break;
 
+      case BATIOC_OPERATE:
+        {
+          FAR int *ptr = (FAR int *)((uintptr_t)arg);
+          if (ptr)
+            {
+              ret = dev->ops->operate(dev, (uintptr_t)arg);
+            }
+        }
+        break;
+
       default:
         _err("ERROR: Unrecognized cmd: %d\n", cmd);
         ret = -ENOTTY;

drivers/power/bq2425x.c

@@ -134,6 +134,7 @@ static int bq2425x_online(struct battery_charger_dev_s *dev, bool *status);
 static int bq2425x_voltage(struct battery_charger_dev_s *dev, int value);
 static int bq2425x_current(struct battery_charger_dev_s *dev, int value);
 static int bq2425x_input_current(struct battery_charger_dev_s *dev, int value);
+static int bq2425x_operate(struct battery_charger_dev_s *dev, uintptr_t param);
 
 /****************************************************************************
  * Private Data
@@ -146,7 +147,8 @@ static const struct battery_charger_operations_s g_bq2425xops =
   bq2425x_online,
   bq2425x_voltage,
   bq2425x_current,
-  bq2425x_input_current
+  bq2425x_input_current,
+  bq2425x_operate
 };
 
 /****************************************************************************
@@ -728,6 +730,19 @@ static int bq2425x_input_current(struct battery_charger_dev_s *dev, int value)
   return OK;
 }
 
+/****************************************************************************
+ * Name: bq2425x_operate
+ *
+ * Description:
+ *   Do miscellaneous battery ioctl()
+ *
+ ****************************************************************************/
+
+static int bq2425x_operate(struct battery_charger_dev_s *dev, uintptr_t param)
+{
+  return -ENOSYS;
+}
+
 /****************************************************************************
  * Public Functions
  ****************************************************************************/