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([2405:201:3006:188a:ab1c:a345:8b47:60e8]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2a2f3c66629sm369715935ad.14.2026.01.01.22.24.11 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 01 Jan 2026 22:24:14 -0800 (PST) Message-ID: <5795292f-d732-4f75-a827-b86bb6c69ab7@gmail.com> Date: Fri, 2 Jan 2026 15:24:09 +0900 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v6 1/2] platform/x86: thinkpad_acpi: Add support to detect hardware damage detection capability. To: =?UTF-8?Q?Ilpo_J=C3=A4rvinen?= Cc: Hans de Goede , platform-driver-x86@vger.kernel.org, LKML , njoshi1@lenovo.com, Mark Pearson References: <20251224095019.11622-1-nitjoshi@gmail.com> Content-Language: en-US From: Nitin In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit On 12/30/25 01:49, Ilpo Järvinen wrote: > On Wed, 24 Dec 2025, Nitin Joshi wrote: > >> Thinkpads are adding the ability to detect and report hardware damage >> status. Add new sysfs interface to identify whether hardware damage >> is detected or not. >> >> Initial support is available for the USB-C replaceable connector. >> >> Reviewed-by: Mark Pearson >> Signed-off-by: Nitin Joshi >> --- >> Changes since v1: >> -Split patch between hwdd_status and hwdd_detail >> -Incorporated review comments >> Changes since v2: >> -Control visibility of the sysfs attribute based upon ucdd_supported >> Changes since v3: >> -Fix documentation build warning >> Changes since v4: >> -Removed extra line >> Changes since v5: >> -Improved code indentation >> --- >> .../admin-guide/laptops/thinkpad-acpi.rst | 21 ++++ >> drivers/platform/x86/lenovo/thinkpad_acpi.c | 105 ++++++++++++++++++ >> 2 files changed, 126 insertions(+) >> >> diff --git a/Documentation/admin-guide/laptops/thinkpad-acpi.rst b/Documentation/admin-guide/laptops/thinkpad-acpi.rst >> index 4ab0fef7d440..2db05f718b11 100644 >> --- a/Documentation/admin-guide/laptops/thinkpad-acpi.rst >> +++ b/Documentation/admin-guide/laptops/thinkpad-acpi.rst >> @@ -54,6 +54,7 @@ detailed description): >> - Setting keyboard language >> - WWAN Antenna type >> - Auxmac >> + - Hardware damage detection capability >> >> A compatibility table by model and feature is maintained on the web >> site, http://ibm-acpi.sf.net/. I appreciate any success or failure >> @@ -1576,6 +1577,26 @@ percentage level, above which charging will stop. >> The exact semantics of the attributes may be found in >> Documentation/ABI/testing/sysfs-class-power. >> >> +Hardware damage detection capability >> +------------------------------------ >> + >> +sysfs attributes: hwdd_status >> + >> +Thinkpads are adding the ability to detect and report hardware damage. >> +Add new sysfs interface to identify the damaged device status. >> +Initial support is available for the USB-C replaceable connector. >> + >> +The command to check device damaged status is:: >> + >> + cat /sys/devices/platform/thinkpad_acpi/hwdd_status >> + >> +This value displays status of device damaged >> +- 0 = Not Damaged >> +- 1 = Damaged > This seems to result in not the best formatting for htmldocs: > > "This value displays status of device damaged - 0 = Not Damaged - 1 = Damaged" Ack. I will modify it and send updated patch for this. I will also modify slightly for Patch 2/2 as well.  Happy New Year ! Best Regards, Nitin Joshi