Fix various typos in comments. From Alan Carvalho de Assis

drivers/can.c

@@ -143,7 +143,7 @@ static int can_open(FAR struct file *filep)
     }
   else
     {
-      /* Increment the count of references to the device.  If this the first
+      /* Increment the count of references to the device.  If this is the first
        * time that the driver has been opened for this device, then initialize
        * the device.
        */
@@ -453,9 +453,9 @@ static ssize_t can_write(FAR struct file *filep, FAR const char *buffer, size_t
 
   flags = irqsave();
 
-  /* Check if the TX is inactive when we started. In certain race conditionas, there
-   * may be a pending interrupt to kick things back off, but we will here that there
-   * is not.  That the hardware is IDLE and will need to be kick-started.
+  /* Check if the TX is inactive when we started. In certain race conditions, there
+   * may be a pending interrupt to kick things back off, but we will be sure here that
+   * there is not.  That the hardware is IDLE and will need to be kick-started.
    */
 
   inactive = dev_txempty(dev);

drivers/lcd/ssd1289.c

@@ -2,7 +2,7 @@
  * drivers/lcd/ssd1289.c
  *
  * Generic LCD driver for LCDs based on the Solomon Systech SSD1289 LCD controller.
- * Think of this as a template for an LCD driver that you will proably ahve to
+ * Think of this as a template for an LCD driver that you will probably have to
  * customize for any particular LCD hardware.
  *
  *   Copyright (C) 2012 Gregory Nutt. All rights reserved.

drivers/pwm.c

@@ -266,7 +266,7 @@ errout:
  * Name: pwm_read
  *
  * Description:
- *   A dummy read method.  This is provided only to satsify the VFS layer.
+ *   A dummy read method.  This is provided only to satisfy the VFS layer.
  *
  ************************************************************************************/
 
@@ -281,7 +281,7 @@ static ssize_t pwm_read(FAR struct file *filep, FAR char *buffer, size_t buflen)
  * Name: pwm_write
  *
  * Description:
- *   A dummy write method.  This is provided only to satsify the VFS layer.
+ *   A dummy write method.  This is provided only to satisfy the VFS layer.
  *
  ************************************************************************************/
 
@@ -469,7 +469,7 @@ static int pwm_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
       /* PWMIOC_GETCHARACTERISTICS - Get the currently selected characteristics of
        *   the pulsed output (independent of whether the output is start or stopped).
        *
-       *   ioctl argument:  A reference to struct pwm_info_s to recevie the
+       *   ioctl argument:  A reference to struct pwm_info_s to receive the
        *   characteristics of the pulsed output.
        */
 
@@ -569,7 +569,7 @@ static int pwm_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
  *   reset state (as if the shutdown() method had already been called).
  *
  * Input parameters:
- *   path - The full path to the driver to be registers in the NuttX pseudo-
+ *   path - The full path to the driver to be registered in the NuttX pseudo-
  *     filesystem.  The recommended convention is to name all PWM drivers
  *     as "/dev/pwm0", "/dev/pwm1", etc.  where the driver path differs only
  *     in the "minor" number at the end of the device name.
@@ -622,7 +622,7 @@ int pwm_register(FAR const char *path, FAR struct pwm_lowerhalf_s *dev)
  *      number of pulses is required, the 'count' value will be nonzero.
  *   2. The lower half driver's start() methoc must verify that it can
  *      support the request pulse train (frequency, duty, AND pulse count).
- *      It it cannot, it should return an error.  If the pulse count is
+ *      If it cannot, it should return an error.  If the pulse count is
  *      non-zero, it should set up the hardware for that number of pulses
  *      and return success.  NOTE:  That is CONFIG_PWM_PULSECOUNT is
  *      defined, the start() method receives an additional parameter

drivers/ramdisk.c

@@ -139,7 +139,7 @@ static int rd_close(FAR struct inode *inode)
 /****************************************************************************
  * Name: rd_read
  *
- * Description:  Read the specified numer of sectors
+ * Description:  Read the specified number of sectors
  *
  ****************************************************************************/
 
@@ -329,7 +329,7 @@ int romdisk_register(int minor, uint8_t *buffer, uint32_t nsectors,
 
       snprintf(devname, 16, "/dev/ram%d", minor);
 
-      /* Inode private data is a reference to the ramdisk device stgructure */
+      /* Inode private data is a reference to the ramdisk device structure */
 
       ret = register_blockdriver(devname, &g_bops, 0, dev);
       if (ret < 0)

drivers/rwbuffer.c

@@ -194,7 +194,7 @@ static void rwb_wrtimeout(FAR void *arg)
   FAR struct rwbuffer_s *rwb = (struct rwbuffer_s *)arg;
   DEBUGASSERT(rwb != NULL);
 
-  /* If a timeout elpases with with write buffer activity, this watchdog
+  /* If a timeout elapses with with write buffer activity, this watchdog
    * handler function will be evoked on the thread of execution of the
    * worker thread.
    */

drivers/sensors/qencoder.c

@@ -86,7 +86,7 @@
  * Private Type Definitions
  ****************************************************************************/
 
-/* This structure describes the state of the upper half drivere */
+/* This structure describes the state of the upper half driver */
 
 struct qe_upperhalf_s
 {

drivers/usbdev/cdcacm.c

@@ -1467,6 +1467,7 @@ static int cdcacm_setup(FAR struct usbdevclass_driver_s *driver,
                   {
                     memcpy(&priv->linecoding, dataout, SIZEOF_CDC_LINECODING);
                   }
+
                 ret = 0;
 
                 /* If there is a registered callback to receive line status info, then
@@ -1579,6 +1580,7 @@ static int cdcacm_setup(FAR struct usbdevclass_driver_s *driver,
           cdcacm_ep0incomplete(dev->ep0, ctrlreq);
         }
     }
+
   return ret;
 }
 

drivers/watchdog.c

@@ -222,7 +222,7 @@ errout:
  * Name: wdog_read
  *
  * Description:
- *   A dummy read method.  This is provided only to satsify the VFS layer.
+ *   A dummy read method.  This is provided only to satisfy the VFS layer.
  *
  ************************************************************************************/
 
@@ -237,7 +237,7 @@ static ssize_t wdog_read(FAR struct file *filep, FAR char *buffer, size_t buflen
  * Name: wdog_write
  *
  * Description:
- *   A dummy write method.  This is provided only to satsify the VFS layer.
+ *   A dummy write method.  This is provided only to satisfy the VFS layer.
  *
  ************************************************************************************/
 
@@ -306,7 +306,7 @@ static int wdog_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
       break;
 
     /* cmd:         WDIOC_GETSTATUS
-     * Description: et the status of the watchdog timer.
+     * Description: Get the status of the watchdog timer.
      * Argument:    A writeable pointer to struct watchdog_status_s.
      */