Fix some typos in comments.
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@ -1,7 +1,7 @@
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/****************************************************************************
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* arch/arm/src/stm32/stm32_serial.c
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*
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* Copyright (C) 2009-2014, 2016 Gregory Nutt. All rights reserved.
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* Copyright (C) 2009-2014, 2016, 2017 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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@ -70,6 +70,7 @@
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Some sanity checks *******************************************************/
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/* DMA configuration */
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@ -1771,7 +1772,7 @@ static void up_detach(struct uart_dev_s *dev)
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* interrupt received on the 'irq' It should call uart_transmitchars or
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* uart_receivechar to perform the appropriate data transfers. The
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* interrupt handling logic must be able to map the 'irq' number into the
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* approprite uart_dev_s structure in order to call these functions.
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* appropriate uart_dev_s structure in order to call these functions.
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*
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****************************************************************************/
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@ -2595,7 +2596,7 @@ static void up_dma_rxcallback(DMA_HANDLE handle, uint8_t status, void *arg)
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* Input Parameters:
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*
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* cb - Returned to the driver. The driver version of the callback
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* strucure may include additional, driver-specific state data at
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* structure may include additional, driver-specific state data at
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* the end of the structure.
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*
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* pmstate - Identifies the new PM state
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@ -2661,7 +2662,7 @@ static void up_pm_notify(struct pm_callback_s *cb, int domain,
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* Input Parameters:
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*
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* cb - Returned to the driver. The driver version of the callback
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* strucure may include additional, driver-specific state data at
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* structure may include additional, driver-specific state data at
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* the end of the structure.
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*
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* pmstate - Identifies the new PM state
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