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Thu, 15 Oct 2026 02:07:29 -0700 (PDT) X-Received: by 2002:a05:620a:458f:b0:93c:61e0:81ff with SMTP id af79cd13be357-93ebd0a3722mr3625337785a.1.1792055248826; Thu, 15 Oct 2026 02:07:28 -0700 (PDT) Received: from [192.168.226.26] ([178.235.128.140]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-6b203762b86sm2295665a12.3.2026.10.15.02.07.26 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 15 Oct 2026 02:07:27 -0700 (PDT) Message-ID: <61d16700-ba79-43e9-91c1-41185363eb92@oss.qualcomm.com> Date: Thu, 15 Oct 2026 11:07:25 +0200 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] arm64: dts: qcom: mahua-lenovo-thinkpad-t14s-gen7: Add Elan touchpad at 0x15 To: Luke Macken , andersson@kernel.org, konradybcio@kernel.org Cc: abelvesa@kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, srinivas.kandagatla@oss.qualcomm.com, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org References: <20261014234949.1730808-1-luke@phorex.org> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <20261014234949.1730808-1-luke@phorex.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Authority-Analysis: v=2.4 cv=VKpIDNPX c=1 sm=1 tr=0 ts=6ad097d2 cx=c_pps a=UgVkIMxJMSkC9lv97toC5g==:117 a=PRfkaYvzSr8QmIIGAkY2Sg==:17 a=IkcTkHD0fZMA:10 a=660iZSQnnn4A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=eoimf2acIAo5FJnRuUoq:22 a=mO8_gwkcAAAA:8 a=EUspDBNiAAAA:8 a=mPIaOuxEOtotnp-c5OAA:9 a=QEXdDO2ut3YA:10 a=1HOtulTD9v-eNWfpl4qZ:22 a=InTEqNb8lIr1xazlwGwc:22 X-Proofpoint-Spam-Info: AW1haW4tMjYxMDE1MDAzNiBTYWx0ZWRfXyBPOVEurvozg 2i7acGTLKd/wg7iFutDAmsXHyOoZ9grWYqfvh2rCq2N0IsIBZjypkUXOqXlxF3bziL1Gcgf9LpG HJ+Gq3cdJDU4LoNOyzJIlF5MNZhRFTk= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMDE1MDAzNiBTYWx0ZWRfX6qhu6ccOiWLi KHIZFVxGeMI45UHQxT6oefZntLDRngm7aFJGMYYM+k8tJHw2FIOLvc0O8XkvHWtfIY/850ppqvP PX3mQkoWDmkz7UCvV5XFFebTLwETOjS7XFNKSj9cooLAnVNrUevWgebl9YToVqKz7GG1lkIRnT4 62jUlcEbhNswZQCz0d+9TNxk2XWHQiWKugWZfD6B5DJq1q9Q2eOpF3hwuw8n4WVNVyxdnJg04t+ 4fEnOAQ+WH+WK7e1hZKn8fjpORZE8sZkDb4xsgqLgDyZEdEaSNcbBSpF4IK1bkUnROgVMshC2Ao RD2QBYxgUoaLeoyGJmwmtHlWNgxe26gueiXR9E4fIUmrwmA0ZGzIk0wHHR7iVC0khu4wgsTHiqF g2bOHaDrv84zhZ0ph+2ZqaK2ioAd7oplIv8KmHrh86hYcF2cEvmc7SBBLfkDi2wqxOyUZParFGi vK+QL957P5uSnj9cLoQ== X-Proofpoint-ORIG-GUID: GdISk1FY6UiE6SB5WShk9HY7QdKVNgdl X-Proofpoint-GUID: GdISk1FY6UiE6SB5WShk9HY7QdKVNgdl X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-10-13_01,2026-10-14_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 bulkscore=0 lowpriorityscore=0 impostorscore=0 suspectscore=0 malwarescore=0 phishscore=0 spamscore=0 clxscore=1015 priorityscore=1501 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2610080000 definitions=main-2610150036 On 10/15/26 1:49 AM, Luke Macken wrote: > Like the T14s Gen 6, the Gen 7 ships with either a Synaptics touchpad at > I2C address 0x2c or an Elan one at 0x15. The dts only describes the > Synaptics part, so on Elan units (e.g. 22A7000VUS) the touchpad@2c probe > fails silently (nothing answers at that address) and there is no > touchpad, while an I2C scan finds the device at 0x15. > > Describe both, as x1e78100-lenovo-thinkpad-t14s.dtsi does; the absent one > fails probe harmlessly. Both share the interrupt GPIO, so move the > tpad_default pinctrl state from the Synaptics node to the i2c0 bus node > rather than have two nodes claim the same pin. > > Assisted-by: LLM > Signed-off-by: Luke Macken > --- Reviewed-by: Konrad Dybcio Konrad