[RFC PATCH for Juno 2/2] tty: SBSA compatible UART

[Mark Brown]

On Mon, Sep 01, 2014 at 11:06:01PM +0800, Hanjun Guo wrote:
> From: Graeme Gregory <graeme.gregory at linaro.org>
> 
> This is a subset of pl011 UART which does not supprt DMA or baud rate
> changing.
> 
> It is specified in the Server Base System Architecture document from
> ARM.

Is there any reason not to consider submitting this as a TTY driver now
- are there known problems other than the issues with ACPI in general
(I've not reviewed the code at all)?  The ACPI binding in this case
seems particularly safe since it's a purposely basic and unconfigurable
IP.

I guess we may want to consider handoff to the full pl011 driver at some
point but there's a bunch of stuff with clocks to worry about before
then.

> 
> Signed-off-by: Graeme Gregory <graeme.gregory at linaro.org>
> ---

Missing signoff here.

> +config SBSAUART_TTY
> +	tristate "SBSA UART TTY Driver"
> +	help
> +	  Console and system TTY driver for the SBSA UART which is defined
> +	  in the Server Base System Architecure document for ARM64 servers.
> +

depends on ARM || ARM64 || COMPILE_TEST?
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