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Message-ID: <20090701110136.576a1d14@lxorguk.ukuu.org.uk>
Date: Wed, 1 Jul 2009 11:01:36 +0100
From: Alan Cox <alan@...rguk.ukuu.org.uk>
To: Andy Isaacson <adi@...are.com>
Cc: linux-kernel@...r.kernel.org, tpmdd-devel@...ts.sourceforge.net,
adi@...apodia.org, Rajiv Andrade <srajiv@...ux.vnet.ibm.com>,
dds@...gle.com, Mimi Zohar <zohar@...ux.vnet.ibm.com>,
Shahbaz Khan <shaz.linux@...il.com>, seiji.munetoh@...il.com,
Andy Isaacson <adi@...are.com>
Subject: Re: [PATCH 5/6] tpm_tis: convert from pnp_driver to acpi_driver
On Tue, 30 Jun 2009 18:04:14 -0700
Andy Isaacson <adi@...are.com> wrote:
> Not all TIS-compatible TPM chips have a _HID method in their ACPI entry,
> and the TPM spec says that the _CID method should be used to enumerate
> the TPM chip.
There are a number of systems with TPMs (older laptops) that don't work
very well if you enable ACPI.
This is therefore a regression - NAK
Probably the best thing to do is to provide both ACPI and PnP
registration according to what is configured into the kernel. (And I
guess spot duplicates although the resource should be busy anyway)
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