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Tue, 23 Aug 2022 10:29:49 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 165.204.84.17) smtp.mailfrom=amd.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=amd.com; Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.17) by DM6NAM11FT010.mail.protection.outlook.com (10.13.172.222) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.5546.15 via Frontend Transport; Tue, 23 Aug 2022 10:29:48 +0000 Received: from jatayu.amd.com (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.28; Tue, 23 Aug 2022 05:29:46 -0500 From: Shyam Sundar S K To: , CC: , , "Shyam Sundar S K" Subject: [PATCH 3/4] Documentation/ABI/testing/sysfs-amd-pmf: Add ABI doc for AMD PMF Date: Tue, 23 Aug 2022 15:59:12 +0530 Message-ID: <20220823102913.4181217-4-Shyam-sundar.S-k@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220823102913.4181217-1-Shyam-sundar.S-k@amd.com> References: <20220823102913.4181217-1-Shyam-sundar.S-k@amd.com> MIME-Version: 1.0 X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB04.amd.com (10.181.40.145) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 387f8fa5-a4bb-4b5f-55e5-08da84f2680a X-MS-TrafficTypeDiagnostic: DM5PR12MB1369:EE_ X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 23 Aug 2022 10:29:48.7868 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 387f8fa5-a4bb-4b5f-55e5-08da84f2680a X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: DM6NAM11FT010.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM5PR12MB1369 Precedence: bulk List-ID: X-Mailing-List: platform-driver-x86@vger.kernel.org AMD PMF driver provides the flexibility to turn "on" or "off" CnQF feature (introduced in the earlier patch). Add corresponding ABI documentation for the new sysfs node. Signed-off-by: Shyam Sundar S K --- Documentation/ABI/testing/sysfs-amd-pmf | 11 +++++++++++ 1 file changed, 11 insertions(+) create mode 100644 Documentation/ABI/testing/sysfs-amd-pmf diff --git a/Documentation/ABI/testing/sysfs-amd-pmf b/Documentation/ABI/testing/sysfs-amd-pmf new file mode 100644 index 000000000000..5935dc549185 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-amd-pmf @@ -0,0 +1,11 @@ +What: /sys/devices/platform/AMDI0102\:00/cnqf/feat +Date: July 2022 +Contact: Shyam Sundar S K +Description: Reading this file tells if the AMD Platform Management(PMF) + Cool n Quiet Framework(CnQF) feature is enabled or not. + + This feature is not enabled by default and gets only turned on + if OEM BIOS passes a "flag" to PMF ACPI function (index 11 or 12) + or in case the user writes "on". + + To turn off CnQF user can write "off" to the sysfs node.