uart_unregister_driver
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## Name

uart_unregister_driver — remove a driver from the uart core layer

## Synopsis

`void uart_unregister_driver (` | struct uart_driver * drv`)`;

## Arguments

`drv`

  low level driver structure

## Description

Remove all references to a driver from the core driver. The low level driver must have removed all its ports via the `uart_remove_one_port` if it registered them with `uart_add_one_port`. (ie, drv->port == NULL)

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