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[2001:1c00:c0c:fe00:d2ea:f29d:118b:24dc]) by smtp.gmail.com with ESMTPSA id u16sm2416359ejy.90.2020.12.06.02.41.46 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 06 Dec 2020 02:41:47 -0800 (PST) Subject: Re: [PATCH v2 0/9] Add support for Microsoft Surface System Aggregator Module To: Leon Romanovsky Cc: Maximilian Luz , Greg Kroah-Hartman , linux-kernel@vger.kernel.org, Mark Gross , Andy Shevchenko , =?UTF-8?Q?Barnab=c3=a1s_P=c5=91cze?= , Arnd Bergmann , Rob Herring , Jiri Slaby , "Rafael J . Wysocki" , Len Brown , Steven Rostedt , Ingo Molnar , Masahiro Yamada , Michal Marek , Jonathan Corbet , =?UTF-8?Q?Bla=c5=be_Hrastnik?= , Dorian Stoll , platform-driver-x86@vger.kernel.org, linux-serial@vger.kernel.org, linux-acpi@vger.kernel.org, linux-kbuild@vger.kernel.org, linux-doc@vger.kernel.org References: <20201203212640.663931-1-luzmaximilian@gmail.com> <20201206070705.GA686270@unreal> <052ecf4d-9e08-2c08-8a06-c30ba2b28d82@redhat.com> <20201206085631.GE210929@unreal> <20201206103339.GB693271@unreal> From: Hans de Goede Message-ID: Date: Sun, 6 Dec 2020 11:41:46 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.4.0 MIME-Version: 1.0 In-Reply-To: <20201206103339.GB693271@unreal> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-doc@vger.kernel.org Hi, On 12/6/20 11:33 AM, Leon Romanovsky wrote: > On Sun, Dec 06, 2020 at 11:04:06AM +0100, Hans de Goede wrote: >> But there is a difference between being careful and just nacking >> it because no new UAPI may be added at all (also see GKH's response). > > I saw, the author misunderstood the Greg's comments. Quoting from patch 8/9: " +============================== +User-Space EC Interface (cdev) +============================== + +The ``surface_aggregator_cdev`` module provides a misc-device for the SSAM +controller to allow for a (more or less) direct connection from user-space to +the SAM EC. It is intended to be used for development and debugging, and +therefore should not be used or relied upon in any other way. Note that this +module is not loaded automatically, but instead must be loaded manually. " If I'm not mistaken that seems to be pretty much what Greg asked for. Regards, Hans