Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932791AbcDHM6J (ORCPT ); Fri, 8 Apr 2016 08:58:09 -0400 Received: from foss.arm.com ([217.140.101.70]:39528 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753572AbcDHM6F (ORCPT ); Fri, 8 Apr 2016 08:58:05 -0400 Subject: Re: [PATCH] mailbox: pcc: Support HW-Reduced Communication Subspace Type 2 To: hotran References: <1459894447-15400-1-git-send-email-hotran@apm.com> Cc: Jassi Brar , "Rafael J. Wysocki" , Len Brown , Robert Moore , Lv Zheng , linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, devel@acpica.org, Sudeep Holla , lho@apm.com, dhdang@apm.com From: Sudeep Holla Organization: ARM Message-ID: <5707AAD8.9070306@arm.com> Date: Fri, 8 Apr 2016 13:58:00 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.6.0 MIME-Version: 1.0 In-Reply-To: <1459894447-15400-1-git-send-email-hotran@apm.com> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1047 Lines: 30 Hi, On 05/04/16 23:14, hotran wrote: > ACPI 6.1 has a HW-Reduced Communication Subspace Type 2 intended for > use on HW-Reduce ACPI Platform, which requires read-modify-write sequence > to acknowledge doorbell interrupt. This patch provides the implementation > for the Communication Subspace Type 2. > > Signed-off-by: Hoan Tran > --- > drivers/mailbox/pcc.c | 384 +++++++++++++++++++++++++++++++++++++------------- > include/acpi/actbl3.h | 8 +- This(2nd) file is generally imported from ACPICA directly. So you need to work with acpica-devel list(you can cc Robert Moore) to get that alone integrated in acpica projected so that iasl tool and other related components also gain support for this first. If the ACPI tables are generated by UEFI, it would be good to add the support in tianocore project. IIRC tianocore has some PCC reference in Acpi60.h header. It would help if the above two are done before we start looking into Linux changes(pcc.c). To summarize this patch needs to be split. -- Regards, Sudeep