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Tue, 25 Aug 2026 02:41:05 -0700 (PDT) X-Received: by 2002:a05:6102:34f4:b0:77b:fd61:ab6a with SMTP id ada2fe7eead31-77bfd61c1e4mr2511505137.1.1787650865058; Tue, 25 Aug 2026 02:41:05 -0700 (PDT) Received: from [192.168.120.193] ([178.235.128.140]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-6a59e1d741asm12971578a12.27.2026.08.25.02.41.02 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 25 Aug 2026 02:41:04 -0700 (PDT) Message-ID: <9c8e4e57-135b-4f24-97b5-dde9c0418efd@oss.qualcomm.com> Date: Tue, 25 Aug 2026 11:41:02 +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 v3 2/2] i2c: qcom-target: Add driver for Qualcomm I2C target controller To: Viken Dadhaniya , Mukesh Kumar Savaliya , Andi Shyti , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: linux-arm-msm@vger.kernel.org, linux-i2c@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org References: <20260813-i2c-qcom-slave-v3-0-1d3742e2ad47@oss.qualcomm.com> <20260813-i2c-qcom-slave-v3-2-1d3742e2ad47@oss.qualcomm.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <20260813-i2c-qcom-slave-v3-2-1d3742e2ad47@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-Spam-Info: AW1haW4tMjYwODI1MDA4MSBTYWx0ZWRfX97yEoS9j1tvi 9cxsCXBWbktJY8DH1vKcY+3FwLs7jjzNEyJAmc7oXhI5qAmkwhV+m9zsUb/k+O/xg9VaDpnaxAv A1MGDkIIbchah95msm8ieKupDinzSXU= X-Proofpoint-GUID: mOGNqDFxU41zRBRvegXKtL2-nLdTkYBa X-Proofpoint-ORIG-GUID: mOGNqDFxU41zRBRvegXKtL2-nLdTkYBa X-Authority-Analysis: v=2.4 cv=Ru716imK c=1 sm=1 tr=0 ts=6a8d6332 cx=c_pps a=5HAIKLe1ejAbszaTRHs9Ug==:117 a=PRfkaYvzSr8QmIIGAkY2Sg==:17 a=IkcTkHD0fZMA:10 a=Sv0fKeRqtYgA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=_glEPmIy2e8OvE2BGh3C:22 a=qjjNvQ9hGNcemuQZb4oA:9 a=QEXdDO2ut3YA:10 a=gYDTvv6II1OnSo0itH1n:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwODI1MDA4MSBTYWx0ZWRfX+61gi93/khRW zeJGn0WIT+OuupZPRISkBEcENpstw2mU10ZRe3Tt9W/dunbWZW0X1rtOIgT+veBD2Lco462y3de 4NaSNj9+Cww2eVtrmO08W9Cha2yHoJDizR76ZyjRhcRaCBfzKptp7/4uwU7y+SOp+OYNbLqaDV2 dxt0rku3w8ihgea7ywi2wAXIn/hybr8r/SUSNWNqmpV+sgBtDIIgKH0BV37II7jMDe4hfuGtFWN 7wCBI4qw5wX1rcgYXuKhypaVOuAWZ7Eln3F6YfXu9LEHA/MrWQaxJpiSZZcEXikch6vo+kAASxi oSfqiKYguTOR9tz6TubIcbwig+b7m7n0D4CHbEP/46DnmKKz7STCF9zQgjhLUk0E88cZKsrP+fr y1LEQ94fNDl3bxQ2voLuS3l4H2OBBYIiEm3jdBIAcayWWEaCQVXwX6egWiZpewbsITaIvLoKyuL CcfvB9xedIs0Qz7JsJw== 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=2026-08-25_02,2026-08-24_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 clxscore=1015 suspectscore=0 adultscore=0 lowpriorityscore=0 phishscore=0 malwarescore=0 impostorscore=0 spamscore=0 priorityscore=1501 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2608250081 On 8/13/26 5:52 PM, Viken Dadhaniya wrote: > QDU1000 and related Qualcomm SoCs include a dedicated I2C target > controller that operates exclusively in target mode. The existing > Qualcomm I2C controller drivers (GENI, QUP) are master-only and cannot > serve systems where the SoC must respond as an I2C target on the bus. [...] > + ret = clk_prepare_enable(target->xo_clk); > + if (ret) > + return dev_err_probe(dev, ret, "failed to enable XO clock\n"); > + > + ret = clk_prepare_enable(target->ahb_clk); > + if (ret) { > + clk_disable_unprepare(target->xo_clk); > + return dev_err_probe(dev, ret, "failed to enable AHB clock\n"); > + } Does this need an OPP table? Presumably we need a power vote for each bus frequency Konrad