linux-kernel - Re: [RFC PATCH 00/14] Support timezone of ACPI TAD and EFI TIME

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Message-ID: <52B4BA0A.1030902@zytor.com>
Date:	Fri, 20 Dec 2013 13:43:38 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	"Rafael J. Wysocki" <rjw@...ysocki.net>
CC:	joeyli <jlee@...e.com>, Alessandro Zummo <a.zummo@...ertech.it>,
	Matt Fleming <matt@...sole-pimps.org>,
	Matthew Garrett <matthew.garrett@...ula.com>, Elliott@...com,
	samer.el-haj-mahmoud@...com, Oliver Neukum <oneukum@...e.de>,
	werner@...e.com, trenn@...e.de, JBeulich@...e.com,
	linux-kernel@...r.kernel.org, rtc-linux@...glegroups.com,
	x86@...nel.org,
	"linux-efi@...r.kernel.org" <linux-efi@...r.kernel.org>,
	linux-acpi@...r.kernel.org, Borislav Petkov <bp@...e.de>
Subject: Re: [RFC PATCH 00/14] Support timezone of ACPI TAD and EFI TIME

On 12/20/2013 01:45 PM, Rafael J. Wysocki wrote:
> 
> My understanding, however, is that to use the TAD, we don't actually need to
> create a struct acpi_device for it.  We just need a handle to the ACPICA
> object which can be found using acpi_get_devices() as soon as the namespace
> has been extracted from the DSDT and friends.  That in turn happens in
> acpi_early_init(), which is called from start_kernel() right before
> efi_late_init().
> 
> Is that early enough?
> 

Possibly... will have to investigate.  I would also ask if the same
applies to the PNP0B0x devices -- all we really need there is the
presence/absence indication and the I/O port base.

	-hpa


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