From patchwork Sat Apr 29 22:55:24 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Armin Wolf X-Patchwork-Id: 13227115 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D8F3BC7EE24 for ; Sat, 29 Apr 2023 22:55:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231136AbjD2Wzq (ORCPT ); Sat, 29 Apr 2023 18:55:46 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40098 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230504AbjD2Wzo (ORCPT ); Sat, 29 Apr 2023 18:55:44 -0400 Received: from mout.gmx.net (mout.gmx.net [212.227.15.18]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8864C1A2; Sat, 29 Apr 2023 15:55:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gmx.de; s=s31663417; t=1682808927; i=w_armin@gmx.de; bh=O7T6MqzGwzfkORnnXEU9Ca1L9XPKFA5dEiWReOnhImk=; h=X-UI-Sender-Class:From:To:Cc:Subject:Date; b=BxjGcdvQQC9Qjx3wb4Ad3lvsVEc1dN4+NXY616VRa2OD+0pk2iT3VCJuDaRp2pdIT 5SeO1nkDzTd0a9+l8cYX1XxGnBNhh/GTOyqlOm0ZDNxE3qx+mGGJQ8hn3ElSH7Af0j 8YXuU0mMaZTveGI4IfWH+lU5fG1x5QMlatuFrPul+r2nza12HeqkLUfDjlymVdfJlo pIPzydVv8FPrpuwzOqUZOeAmJ5y8uGa3ozk1xKVbWQBLkqYolxrcYzt9+PKHmah80t bd5UFv2n4Fw3idj/wMvq0tZh+ZVZKupkTI2aF8qpNEZrwwKsEoHSPdBxCd3MpN5CT8 nVDLNoWewEYXA== X-UI-Sender-Class: 724b4f7f-cbec-4199-ad4e-598c01a50d3a Received: from esprimo-mx.users.agdsn.de ([141.30.226.129]) by mail.gmx.net (mrgmx005 [212.227.17.190]) with ESMTPSA (Nemesis) id 1Md6Mj-1qSEUW2xF5-00aHoN; Sun, 30 Apr 2023 00:55:27 +0200 From: Armin Wolf To: hdegoede@redhat.com, markgross@kernel.org Cc: corbet@lwn.net, platform-driver-x86@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 1/2] platform/x86: dell-ddv: Add documentation Date: Sun, 30 Apr 2023 00:55:24 +0200 Message-Id: <20230429225525.10507-1-W_Armin@gmx.de> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 X-Provags-ID: V03:K1:pZUwOFjf6yFsgNpFxeZikCjOoIo8eNo/sm9b+narfc+DkvfYjaJ +GD4XB5p01d9+NNGgu1Z9cZSI4xKNMoDUZKEVjNa6VPr1P+hThZ+NlmdTh4vC8UBC0qdo0T p5luMVdRstxqX8fXn3xoo1sMQHV12d9ou1TPsaSktCBa+DO1h+3pAtr3P+wk5/vbv85aWlm 6g08Iq6MyRqIdh7PDjINQ== UI-OutboundReport: notjunk:1;M01:P0:fkys7buEuJk=;rO1VP2ROclAwbzWENQQHb2Kr00B BOmpi6tgPgflGTaVOzUhe6Wf4Cs4CHoCK1sJHZxDfxUt7nhsi2fUu0xsplwWvxAV6C26oP8tN kii9Kw1G2ju/eaVqx9zhlWPf3NqpTVPtHEBSoCwat5sohr2TdOJQOzTQTiMKbF5grQQJu3ZXN 2kXgXVzhV/PO3bH4FIjBLSHgI0IE8xUg/uk6D8dnevlpzBAffkcNO2oL0bFxvj1Qxw7jK6Dlg 0dZbCkim9TpvUAuGf5vUxQ/pyWTPPZCJQOwhA87rvpEcpj0MPP9J9PfenglUEdkyhIsKvOspE yFwhJB3wogVvvyRc1hBgWsmoSrL4kJBC9gXQSg9UHdfx0X7IoCLUEVlcUeZHAlkJXfJs9RMYG cnTaVFvTzW7GhlS3rkI2KP7gbQcwbMEp6pq44MBztHpIH+TipQj01nPC4vtd6+5IhwCgmhaO3 vHJNQLoD1xx+yEZ3tIe5g3wYq+I7104Q0H38sC0Um0BMIq/vdvyok9877QqIXNVYd/kfq5d1B rsXCLcYVw8Iy7JyBBcs2wHdItQbqONaz6w33oLCUkotfkFPQB8zcAAVqVMYs95WSMGyaG5tqa gauBX+tmie1ULlI7w7GaZL4DOn9vYQdi9CqT8vTK+k2RpspLKgrAIpI/RL97+JDjYx+8LBbA+ DIh0WDylpYVwYLSy25IKdmL3LXApGf0PqNIxDXfIHCwsQ9kZ5W25XnzN9YHvzvsM/axx9t6t4 7ZFYCFCPnbGEN003hSMPk4igK0uTKqBLCVch5h/+kqLgXmP6EnSZnPVEblAl4nTj9ov+IhC3U kZk6HcpppRFwZ5CLZwivSk7Ew3VKeYmE8VvraTyeNgscS4BmlP7LIUUYw0pjvsbFpPKsBeRyj kC2qaQzK5CpdXmy3rn8E7W3IwITMtaDFN/a2WAbzaX9PLcOxJYx4AgTUVR0CEH52yN4nd5sqa KRP2T0alCsCenhKw0aLXBWsL2f8= Precedence: bulk List-ID: X-Mailing-List: platform-driver-x86@vger.kernel.org The WMI interface used by the dell-wmi-ddv driver contains many methods which are currently unused, making it difficult to document these inside the drivers source code. Create the necessary documentation based on current knowledge so that all details of the WMI interface are written down for later use. Signed-off-by: Armin Wolf --- Documentation/wmi/devices/dell-wmi-ddv.rst | 294 +++++++++++++++++++++ MAINTAINERS | 1 + 2 files changed, 295 insertions(+) create mode 100644 Documentation/wmi/devices/dell-wmi-ddv.rst -- 2.30.2 diff --git a/Documentation/wmi/devices/dell-wmi-ddv.rst b/Documentation/wmi/devices/dell-wmi-ddv.rst new file mode 100644 index 000000000000..3fc6ee3e9f9b --- /dev/null +++ b/Documentation/wmi/devices/dell-wmi-ddv.rst @@ -0,0 +1,294 @@ +.. SPDX-License-Identifier: GPL-2.0-or-later + +============================================ +Dell DDV WMI interface driver (dell-wmi-ddv) +============================================ + +Introduction +============ + +Many Dell notebooks made after ~2020 support a WMI-based interface for +retrieving various system data like battery temperature, ePPID, diagostic data +and fan/thermal sensor data. + +This interface is likely used by the `Dell Data Vault` software on Windows, +so it was called `DDV`. Currently the ``dell-wmi-ddv`` driver supports +version 2 and 3 of the interface, with support for new interface versions +easily added. + +.. warning:: The interface is regarded as internal by Dell, so no vendor + documentation is available. All knowledge was thus obtained by + trial-and-error, please keep that in mind. + +Dell ePPID (electronic Piece Part Identification) +================================================= + +The Dell ePPID is used to uniquely identify components in Dell machines, +including batteries. It has a form similar to `CC-PPPPPP-MMMMM-YMD-SSSS-FFF` +and contains the following information: + +* Country code of origin (CC). +* Part number with the first character being a filling number (PPPPPP). +* Manufacture Identification (MMMMM). +* Manufacturing Year/Month/Date (YMD) in base 36, with Y being the last digit + of the year. +* Manufacture Sequence Number (SSSS). +* Optional Firmware Version/Revision (FFF). + +The `eppidtool `_ python utility can be used +to decode and display this information. + +All information regarding the Dell ePPID was gathered using Dell support +documentation and `this website `_. + +WMI interface description +========================= + +The WMI interface description can be decoded from the embedded binary MOF (bmof) +data using the `bmfdec `_ utility: + +:: + + [WMI, Dynamic, Provider("WmiProv"), Locale("MS\\0x409"), Description("WMI Function"), guid("{8A42EA14-4F2A-FD45-6422-0087F7A7E608}")] + class DDVWmiMethodFunction { + [key, read] string InstanceName; + [read] boolean Active; + + [WmiMethodId(1), Implemented, read, write, Description("Return Battery Design Capacity.")] void BatteryDesignCapacity([in] uint32 arg2, [out] uint32 argr); + [WmiMethodId(2), Implemented, read, write, Description("Return Battery Full Charge Capacity.")] void BatteryFullChargeCapacity([in] uint32 arg2, [out] uint32 argr); + [WmiMethodId(3), Implemented, read, write, Description("Return Battery Manufacture Name.")] void BatteryManufactureName([in] uint32 arg2, [out] string argr); + [WmiMethodId(4), Implemented, read, write, Description("Return Battery Manufacture Date.")] void BatteryManufactureDate([in] uint32 arg2, [out] uint32 argr); + [WmiMethodId(5), Implemented, read, write, Description("Return Battery Serial Number.")] void BatterySerialNumber([in] uint32 arg2, [out] uint32 argr); + [WmiMethodId(6), Implemented, read, write, Description("Return Battery Chemistry Value.")] void BatteryChemistryValue([in] uint32 arg2, [out] string argr); + [WmiMethodId(7), Implemented, read, write, Description("Return Battery Temperature.")] void BatteryTemperature([in] uint32 arg2, [out] uint32 argr); + [WmiMethodId(8), Implemented, read, write, Description("Return Battery Current.")] void BatteryCurrent([in] uint32 arg2, [out] uint32 argr); + [WmiMethodId(9), Implemented, read, write, Description("Return Battery Voltage.")] void BatteryVoltage([in] uint32 arg2, [out] uint32 argr); + [WmiMethodId(10), Implemented, read, write, Description("Return Battery Manufacture Access(MA code).")] void BatteryManufactureAceess([in] uint32 arg2, [out] uint32 argr); + [WmiMethodId(11), Implemented, read, write, Description("Return Battery Relative State-Of-Charge.")] void BatteryRelativeStateOfCharge([in] uint32 arg2, [out] uint32 argr); + [WmiMethodId(12), Implemented, read, write, Description("Return Battery Cycle Count")] void BatteryCycleCount([in] uint32 arg2, [out] uint32 argr); + [WmiMethodId(13), Implemented, read, write, Description("Return Battery ePPID")] void BatteryePPID([in] uint32 arg2, [out] string argr); + [WmiMethodId(14), Implemented, read, write, Description("Return Battery Raw Analytics Start")] void BatteryeRawAnalyticsStart([in] uint32 arg2, [out] uint32 argr); + [WmiMethodId(15), Implemented, read, write, Description("Return Battery Raw Analytics")] void BatteryeRawAnalytics([in] uint32 arg2, [out] uint32 RawSize, [out, WmiSizeIs("RawSize") : ToInstance] uint8 RawData[]); + [WmiMethodId(16), Implemented, read, write, Description("Return Battery Design Voltage.")] void BatteryDesignVoltage([in] uint32 arg2, [out] uint32 argr); + [WmiMethodId(17), Implemented, read, write, Description("Return Battery Raw Analytics A Block")] void BatteryeRawAnalyticsABlock([in] uint32 arg2, [out] uint32 RawSize, [out, WmiSizeIs("RawSize") : ToInstance] uint8 RawData[]); + [WmiMethodId(18), Implemented, read, write, Description("Return Version.")] void ReturnVersion([in] uint32 arg2, [out] uint32 argr); + [WmiMethodId(32), Implemented, read, write, Description("Return Fan Sensor Information")] void FanSensorInformation([in] uint32 arg2, [out] uint32 RawSize, [out, WmiSizeIs("RawSize") : ToInstance] uint8 RawData[]); + [WmiMethodId(34), Implemented, read, write, Description("Return Thermal Sensor Information")] void ThermalSensorInformation([in] uint32 arg2, [out] uint32 RawSize, [out, WmiSizeIs("RawSize") : ToInstance] uint8 RawData[]); + }; + +Each WMI method takes an ACPI buffer containing a 32-bit index as input argument, +with the first 8 bit being used to specify the battery when using battery-related +WMI methods. Other WMI methods may ignore this argument or interpret it +differently. The WMI method output format varies: + +* if the function has only a single output, then an ACPI object + of the corresponding type is returned +* if the function has multiple outputs, when an ACPI package + containing the outputs in the same order is returned + +The format of the output should be thoroughly checked, since many methods can +return malformed data in case of an error. + +The data format of many battery-related methods seems to be based on the +`Smart Battery Data Specification`, so unknown battery-related methods are +likely to follow this standard in some way. + +WMI method GetBatteryDesignCapacity() +------------------------------------- + +Returns the design capacity of the battery in mAh as an u16. + +WMI method BatteryFullCharge() +------------------------------ + +Returns the full charge capacity of the battery in mAh as an u16. + +WMI method BatteryManufactureName() +----------------------------------- + +Returns the manufacture name of the battery as an ASCII string. + +WMI method BatteryManufactureDate() +----------------------------------- + +Returns the manufacture date of the battery as an u16. +The date is encoded in the following manner: + +- bits 0 to 4 contain the manufacture day. +- bits 5 to 8 contain the manufacture month. +- bits 9 to 15 contain the manufacture year biased by 1980. + +.. note:: + The data format needs to be verified on more machines. + +WMI method BatterySerialNumber() +-------------------------------- + +Returns the serial number of the battery as an u16. + +WMI method BatteryChemistryValue() +---------------------------------- + +Returns the chemistry of the battery as an ASCII string. +Known values are: + +- "Li-I" for Li-Ion + +WMI method BatteryTemperature() +------------------------------- + +Returns the temperature of the battery in tenth degree kelvin as an u16. + +WMI method BatteryCurrent() +--------------------------- + +Returns the current flow of the battery in mA as an s16. +Negative values indicate discharging. + +WMI method BatteryVoltage() +--------------------------- + +Returns the voltage flow of the battery in mV as an u16. + +WMI method BatteryManufactureAccess() +------------------------------------- + +Returns a manufacture-defined value as an u16. + +WMI method BatteryRelativeStateOfCharge() +----------------------------------------- + +Returns the capacity of the battery in percent as an u16. + +WMI method BatteryCycleCount() +------------------------------ + +Returns the cycle count of the battery as an u16. + +WMI method BatteryePPID() +------------------------- + +Returns the ePPID of the battery as an ASCII string. + +WMI method BatteryeRawAnalyticsStart() +-------------------------------------- + +Performs an analysis of the battery and returns a status code: + +- ``0x0``: Success +- ``0x1``: Interface not supported +- ``0xfffffffe``: Error/Timeout + +.. note:: + The meaning of this method is still largely unknown. + +WMI method BatteryeRawAnalytics() +--------------------------------- + +Returns a buffer usually containg 12 blocks of analytics data. +Those blocks contain: +- block number starting with 0 (u8) +- 31 bytes of unknown data + +.. note:: + The meaning of this method is still largely unknown. + +WMI method BatteryDesignVoltage() +--------------------------------- + +Returns the design voltage of the battery in mV as an u16. + +WMI method BatteryeRawAnalyticsABlock() +--------------------------------------- + +Returns a single block of analytics data, with the second byte +of the index being used for selecting the block number. + +*Supported since WMI interface version 3!* + +.. note:: + The meaning of this method is still largely unknown. + +WMI method ReturnVersion() +-------------------------- + +Returns the WMI interface version as an u32. + +WMI method FanSensorInformation() +--------------------------------- + +Returns a buffer containg fan sensor entries, terminated +with a single ``0xff``. +Those entries contain: + +- fan type (u8) +- fan speed in RPM (little endian u16) + +WMI method ThermalSensorInformation() +------------------------------------- + +Returns a buffer containing thermal sensor entries, terminated +with a single ``0xff``. +Those entries contain: + +- thermal type (u8) +- current temperature (s8) +- min. temperature (s8) +- max. temperature (s8) +- unknown field (u8) + +.. note:: + Find out what the meaning of the last byte is. + +ACPI battery matching algorithm +=============================== + +The algorithm used to match ACPI batteries to indices is based on information +which was found inside the logging messages of the OEM software. + +Basically for each new ACPI battery, the serial numbers of the batteries behind +indices 1 till 3 are compared with the serial number of the ACPI battery. +Since the serial number of the ACPI battery can either be encoded as a normal +integer or as a hexadecimal value, both cases need to be checked. The first +index with a matching serial number is then selected. + +A serial number of 0 indicates that the corresponding index is not associated +with an actual battery, or that the associated battery is not present. + +Some machines like the Dell Inspiron 3505 only support a single battery and thus +ignore the battery index. Because of this the driver depends on the ACPI battery +hook mechanism to discover batteries. + +.. note:: + The ACPI battery matching algorithm currently used inside the driver is + outdated and does not match the algorithm described above. The reasons for + this are differences in the handling of the ToHexString() ACPI opcode between + Linux and Windows, which distorts the serial number of ACPI batteries on many + machines. Until this issue is resolved, the driver cannot use the above + algorithm. + +Reverse-Engineering the DDV WMI interface +========================================= + +1. Find a supported Dell notebook, usually made after ~2020. +2. Dump the ACPI tables and search for the WMI device (usually called "ADDV"). +3. Decode the corresponding bmof data and look at the ASL code. +4. Try to deduce the meaning of a certain WMI method by comparing the control + flow with other ACPI methods (_BIX or _BIF for battery related methods + for example). +5. Use the built-in UEFI diagostics to view sensor types/values for fan/thermal + related methods (sometimes overwriting static ACPI data fields can be used + to test different sensor type values, since on some machines this data is + not reinitialized upon a warm reset). + +Alternatively: + +1. Load the ``dell-wmi-ddv`` driver, use the ``force`` module param + if necessary. +2. Use the debugfs interface to access the raw fan/thermal sensor buffer data. +3. Compare the data with the built-in UEFI diagnostics. + +In case the DDV WMI interface version available on your Dell notebook is not +supported or you are seeing unknown fan/thermal sensors, please submit a +bugreport on `bugzilla `_ so they can be added +to the ``dell-wmi-ddv`` driver. diff --git a/MAINTAINERS b/MAINTAINERS index 4d5b1f6d77f6..66e4eabaf972 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -5804,6 +5804,7 @@ M: Armin Wolf S: Maintained F: Documentation/ABI/testing/debugfs-dell-wmi-ddv F: Documentation/ABI/testing/sysfs-platform-dell-wmi-ddv +F: Documentation/wmi/devices/dell-wmi-ddv.rst F: drivers/platform/x86/dell/dell-wmi-ddv.c DELL WMI SYSMAN DRIVER From patchwork Sat Apr 29 22:55:25 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Armin Wolf X-Patchwork-Id: 13227114 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 344DEC77B7C for ; Sat, 29 Apr 2023 22:55:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230474AbjD2Wzo (ORCPT ); Sat, 29 Apr 2023 18:55:44 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40096 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230353AbjD2Wzn (ORCPT ); Sat, 29 Apr 2023 18:55:43 -0400 Received: from mout.gmx.net (mout.gmx.net [212.227.17.21]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B4C7ADE; Sat, 29 Apr 2023 15:55:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gmx.de; s=s31663417; t=1682808930; i=w_armin@gmx.de; bh=OPVah3fGgiFDxtemCf8HhtgjxqFM4GudTMA58n/qrqg=; h=X-UI-Sender-Class:From:To:Cc:Subject:Date:In-Reply-To:References; b=n3pyPON8ToRzN9zU24IWOAsIgtuJmV9Y+1AVeTsBmx2htwdYmJ70zx9H5ooOltxAv f03FPekgMENIepTWIXeLlVtbuP6PjkjbxvZwzW6pOFOLU31AiAtdWoVPCrWriDikIC uegD7pnPGotauBVOvEBhccFlNwFCxyeyWxa0MGUuctSbKHYg+YQpesHNlPeYf1LA42 id7O23vFPl9USeMdm6RsK17sSzVDRGl4IIIKNMwfP9vNUWH10vBvFrw0fyoNpiLc/l QSktCg5mAbaPbOCjM8l8wFuahI0MOhnWdBJFYybzHoorQCjKD90j8Hg/Kw3lH2wDaz 2CyPICCHcJuDg== X-UI-Sender-Class: 724b4f7f-cbec-4199-ad4e-598c01a50d3a Received: from esprimo-mx.users.agdsn.de ([141.30.226.129]) by mail.gmx.net (mrgmx105 [212.227.17.168]) with ESMTPSA (Nemesis) id 1MWASY-1pmuF93rqc-00Xe6z; Sun, 30 Apr 2023 00:55:30 +0200 From: Armin Wolf To: hdegoede@redhat.com, markgross@kernel.org Cc: corbet@lwn.net, platform-driver-x86@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 2/2] platform/x86: dell-ddv: Update ABI documentation Date: Sun, 30 Apr 2023 00:55:25 +0200 Message-Id: <20230429225525.10507-2-W_Armin@gmx.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20230429225525.10507-1-W_Armin@gmx.de> References: <20230429225525.10507-1-W_Armin@gmx.de> MIME-Version: 1.0 X-Provags-ID: V03:K1:IkdI6Yin7g1agGdxzczipPFzmKmyhclawkTmmmdxepL/Nk4/4en r1S9+rKZCaPsBnlV7swakSdQqV3UZBADEDERilt3SbTESYvt9nbYzyGrldUj7mw/916dBAw BM4PaQBFNmS4U4qLDe7RFNzxLxkaLi6br421uBmyKojcRC0/nfiVoH3LBBCbGLgeFnvArbC MP0lRUqZ75rocy0x4tesQ== UI-OutboundReport: notjunk:1;M01:P0:NucOP6JeLGo=;nx8EOk6dhE4hbOh9HTCkmd26eET ii6KQePZj2OY2lgMmMAhxqu1OoQ95BtJ9g13SbtuN3LIrXceFzPo9+MS8YS6WiFczXFbOGVRP dFElhL7ABv4PAbiBltN1n9blWYrOI9xWoo4nU9Oqpx59dpT5WlaAI0KcYoiiwll66ZKYTlSeE 90IzXf3mNC3EjFAmI6wysYlW1dNchLuEeKQ9DJHUGERCDo/zfipYK3XS2Og7J10B0gMLCJL8m mTdZ7f6jJItnAL2IikDkGtNKLEGhgLx2Xd33cSkIHmmsl1WJJegVWUpDjba6j8EFh4qNUjt6W l0mR/HgozVIPjCIZUG+7cDZwpKqh2Ktpee0fBEhA9jsvVSXmPQmAJOuprofvgEkNWdTb2AiPW EQdW5LWBInijaVCEQLrz3bVqLpuIjzOgrdu/wCHbmClxRcMJ0expoHR8sA10fNCUqu+JUFaqW ag91cr97EEz5xMZqWAPmGyzs1Owp07lZ4S9zFRa2Suu0/kHN0L6bZ6egkAcpX2q16kVxx3IPu tONtWRYK6AIOx+vhQXeZ5AwrnWHtxK1LN0Xg/OEoP5SrmzHHPslaY1ifFwR/WyQs/nM7DJy4U T/N6X2YHqnOZrF8t/iqozrTLjOwFv4lROAz1e3V8yN33nmS+5ix+l+/NqfdNeNPL7lDFhu0B5 DOI8o4fnarMXZqaoc84uRrSM80ZNEYPNfEPwWOAKQqZYNByyCKQsW5p1y4pbudz8MNUjfONgG 4nbqR0dun9ptkcTSPMHTRUGN38/se5wWSSUltOPrhFsLj2fucSVtMm059Ilqm0v3CBKVnL+Ds RJfoYq8ISam3ZNUfCtgawR3MTyeja2cDB+oMRvaqUWjMp2bD2L1iXQlF/h1P4+BN9IW6S9R45 LMEFH4HGG4w3SZqdq64hUwjkDHCPkVK6k3cQWEQVOj3N551jK0EpCFvST/bpKTIXaDac0Kj1V CZuoZyK+V9+uYndyoYeqxQdXDjc= Precedence: bulk List-ID: X-Mailing-List: platform-driver-x86@vger.kernel.org Synchronize the ABI documentation with the driver documentation and direct users to the latter in case they are interested in more detailed information. Signed-off-by: Armin Wolf --- .../ABI/testing/debugfs-dell-wmi-ddv | 29 ++++++++++++++----- .../ABI/testing/sysfs-platform-dell-wmi-ddv | 4 ++- 2 files changed, 24 insertions(+), 9 deletions(-) -- 2.30.2 diff --git a/Documentation/ABI/testing/debugfs-dell-wmi-ddv b/Documentation/ABI/testing/debugfs-dell-wmi-ddv index fbcc5d6f7388..81cfc788be15 100644 --- a/Documentation/ABI/testing/debugfs-dell-wmi-ddv +++ b/Documentation/ABI/testing/debugfs-dell-wmi-ddv @@ -3,19 +3,32 @@ Date: September 2022 KernelVersion: 6.1 Contact: Armin Wolf Description: - This file contains the contents of the fan sensor information buffer, - which contains fan sensor entries and a terminating character (0xFF). + This file contains the contents of the fan sensor information + buffer, which contains fan sensor entries and a terminating + character (0xFF). - Each fan sensor entry consists of three bytes with an unknown meaning, - interested people may use this file for reverse-engineering. + Each fan sensor entry contains: + + - fan type (single byte) + - fan speed in RPM (two bytes, little endian) + + See Documentation/wmi/devices/dell-wmi-ddv.rst for details. What: /sys/kernel/debug/dell-wmi-ddv-/thermal_sensor_information Date: September 2022 KernelVersion: 6.1 Contact: Armin Wolf Description: - This file contains the contents of the thermal sensor information buffer, - which contains thermal sensor entries and a terminating character (0xFF). + This file contains the contents of the thermal sensor information + buffer, which contains thermal sensor entries and a terminating + character (0xFF). + + Each thermal sensor entry contains: + + - thermal type (single byte) + - current temperature (single byte) + - min. temperature (single byte) + - max. temperature (single byte) + - unknown field (single byte) - Each thermal sensor entry consists of five bytes with an unknown meaning, - interested people may use this file for reverse-engineering. + See Documentation/wmi/devices/dell-wmi-ddv.rst for details. diff --git a/Documentation/ABI/testing/sysfs-platform-dell-wmi-ddv b/Documentation/ABI/testing/sysfs-platform-dell-wmi-ddv index 1d97ad615c66..a9d39d9e8865 100644 --- a/Documentation/ABI/testing/sysfs-platform-dell-wmi-ddv +++ b/Documentation/ABI/testing/sysfs-platform-dell-wmi-ddv @@ -3,5 +3,7 @@ Date: September 2022 KernelVersion: 6.1 Contact: Armin Wolf Description: - Reports the Dell ePPID (electronic Dell Piece Part Identification) + Reports the Dell ePPID (electronic Piece Part Identification) of the ACPI battery. + + See Documentation/wmi/devices/dell-wmi-ddv.rst for details.