linux-kernel - Re: [PATCH v3 0/5] ACPI: parse the SPCR table

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Date:	Tue, 16 Feb 2016 14:11:43 -0500
From:	Mark Salter <msalter@...hat.com>
To:	Aleksey Makarov <aleksey.makarov@...aro.org>,
	linux-acpi@...r.kernel.org
Cc:	linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	Russell King <linux@....linux.org.uk>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	"Rafael J . Wysocki" <rjw@...ysocki.net>,
	Leif Lindholm <leif.lindholm@...aro.org>,
	Graeme Gregory <graeme.gregory@...aro.org>,
	Al Stone <ahs3@...hat.com>,
	Christopher Covington <cov@...eaurora.org>
Subject: Re: [PATCH v3 0/5] ACPI: parse the SPCR table

On Mon, 2016-02-15 at 21:05 +0300, Aleksey Makarov wrote:
> This patchset is based on the patchset by Leif Lindholm [1]
> 
> 'ARM Server Base Boot Requirements' [2] mentions SPCR (Serial Port
> Console Redirection Table) [3] as a mandatory ACPI table that
> specifies the configuration of serial console.
> 
> SPCR support is included in QEMU's ARM mach-virt since 2.4 release.
> 
> Introduce a new function acpi_console_check().  At the uart port
> registration, this function checks if the ACPI SPCR table specifies
> its argument of type struct uart_port to be a console
> and if so calls add_preferred_console().
> 
> Use SPCR to tell if SBSA serial driver should use 32-bit access to registers.
> 
> To be able to access SPCR table each time any console is registered
> change __init to __ref for early_acpi_os_unmap_memory().
> 
> The patchset should be applied to tty-next.

On Mustang, m400, and Seattle:

Tested-by: Mark Salter <msalter@...hat.com>