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[103.229.16.4]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-c5edf37b380sm9291384a12.34.2026.01.19.05.17.08 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 19 Jan 2026 05:17:10 -0800 (PST) Message-ID: <2e707d63-ead2-447e-bc90-e2bbdd995020@oss.qualcomm.com> Date: Mon, 19 Jan 2026 21:17:04 +0800 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 v2 ath-current 2/2] dt-bindings: net: wireless: ath11k-pci: remove obsolete firmware-name property To: Krzysztof Kozlowski , jjohnson@kernel.org, johannes@sipsolutions.net, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org Cc: ath11k@lists.infradead.org, linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org References: <20251214025230.716387-1-miaoqing.pan@oss.qualcomm.com> <20251214025230.716387-3-miaoqing.pan@oss.qualcomm.com> <4562bdbc-9811-4f73-bc4b-f5a62ba1c965@oss.qualcomm.com> Content-Language: en-US From: Miaoqing Pan In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Authority-Analysis: v=2.4 cv=ds7Wylg4 c=1 sm=1 tr=0 ts=696e2ed8 cx=c_pps a=RP+M6JBNLl+fLTcSJhASfg==:117 a=nuhDOHQX5FNHPW3J6Bj6AA==:17 a=IkcTkHD0fZMA:10 a=vUbySO9Y5rIA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=CBmV5aUEGw7Cjg3Rx0gA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=iS9zxrgQBfv6-_F4QbHw:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMTE5MDExMCBTYWx0ZWRfX/gJANPB+OEZS suQWig7NSauybg9o5w9JwcbYwvchO/Y+IfORtcAhoN1uDJKvtv7WO09oHzEf8+Vt1lSRYtB25uS 9dA0KaxeVLlye/BvmcuwRzydG1o96nFQnrJPMtHqdP1xta048i6TSMp+2UT+Ji+KRECDG9z6xRH j0U7D98Y9nQ3Ly3vbEbwTOJaw5V7clDQv+JwHVb/jB5FaY/5DfTsu3epEfEu39LKYjP5JgGboux hKiYcSZ9xE4QUgs9xKY0wn3JwAKMs6W28x0yXwDFhqUDctZbXffROpxmMimBPDoggUXafHpK08a 2Um7UUABb/wdtedf7+rR0QpFLOpZKbEBpb/Ki1N8wzm1PlegCDwTp28kOv8k2T5hYUXZCuz9AWR 2XSHj78Cr5s7FzxHsGHq9xg0B9DvOB3rL5a7oKHdLbLc6mJlSrxRuKnOpSQCgLaJsiJXGKKYri9 H7ysVSlk6s0O3SiUc+g== X-Proofpoint-ORIG-GUID: yLlVuClY8NR3RlKvsOmQd5dBlhe5HkZ1 X-Proofpoint-GUID: yLlVuClY8NR3RlKvsOmQd5dBlhe5HkZ1 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.100.49 definitions=2026-01-19_03,2026-01-19_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 impostorscore=0 phishscore=0 priorityscore=1501 spamscore=0 clxscore=1015 adultscore=0 malwarescore=0 lowpriorityscore=0 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2601150000 definitions=main-2601190110 On 1/19/2026 3:08 PM, Krzysztof Kozlowski wrote: > On 19/01/2026 02:34, Miaoqing Pan wrote: >> >> >> On 1/13/2026 3:28 PM, Krzysztof Kozlowski wrote: >>> On 14/12/2025 03:52, Miaoqing Pan wrote: >>>> The firmware-name property was introduced to allow end-users and >>>> integrators to select usecase specific firmware for the WCN6855. >>>> However, specifying firmware for an M.2 WLAN module in the Device >>>> Tree is not appropriate. Instead, this functionality will be handled >>>> within the ath11k driver. >>>> >>>> The driver has removed all support for firmware-name, and no upstream >>>> Device Tree files reference this property. Therefore, this patch >>>> removes the property from the binding and marks it as obsolete. >>> >>> No, it does not mark it obsolete. Point me to the place. >>> >>>> >>>> This is a DT ABI-breaking change, but safe since there are no in-tree >>>> users. >>> >>> It's not safe. What about my board using this WiFi? Or Mr. foo's board? >>> >>> Still NAK, you did not improve it. >>> >>> >> >> I think it’s necessary to clarify the background here. As you can see >> from the git log, all changes related to ath11k firmware-name were >> submitted by me, and the intention was to allow the lemans-evk, >> monaco-evk, and hamoa-iot-evk boards to specify dedicated firmware for >> the WCN6855 Wi-Fi chip. However, the Wi-Fi‑related DTS nodes for these >> boards have never been submitted upstream, because adding a >> firmware-name property for an M.2 device is not appropriate and would be >> difficult for the community to accept. Therefore, the original approach >> was abandoned. > > You added new ABI which can be used by anyone and your commit did not > help me to understand the impact on other users of this ABI. > >> >> The alternative solution is to propose a static lookup table that maps >> device compatibles to firmware names. As a result, we have not submitted >> any DTS patches adding firmware-name for those boards to date. This is >> why I believe that removing firmware-name from the bindings is safe. >> >> If this explanation is still not sufficient, please let me know what >> additional steps are required for accepting these two patches. Thank you. > > You need to deprecate the property and keep the ABI backwards compatible. > Ok, will update in v3.