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Jeremy Kerr 989983ea84 serial/aspeed-vuart: Implement rx throttling
The aspeed VUART runs at LPC bus frequency, rather than being restricted
to a typical UART baud rate. This means that the VUART can receive a lot
of data, which can overrun tty flip buffers, and/or cause a large amount
of interrupt traffic.

This change implements the uart_port->throttle & unthrottle callbacks,
implemented by disabling the receiver line status & received data
available IRQs.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Tested-by: Eddie James <eajames@linux.vnet.ibm.com>
Tested-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-04-23 10:16:50 +02:00
arch serial: 8250_dw: Limit dw8250_tx_wait_empty quirk to armada-38x devices 2018-04-23 10:11:13 +02:00
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drivers serial/aspeed-vuart: Implement rx throttling 2018-04-23 10:16:50 +02:00
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include serial/8250: export serial8250_read_char 2018-04-23 10:16:50 +02:00
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Linux kernel
============

There are several guides for kernel developers and users. These guides can
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