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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: devicetree@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-Details-Enc: AW1haW4tMjYwODI1MDA4MSBTYWx0ZWRfX1ys8aRkxw2Ng v+UpyRo0uuZl63SLIYT+m5LJscvGMla4GVBCostZXHFdmzQgVHLWJOkxN5jWRjQXl8xcx79orfc vBnPHTK7jsob9QPdw4LSFfuDEnbuindiNrTFL4I71N4uPwKwLzm6eINz0f9UKfiDtPOv+9vquBi OdBq4LI3qmDrC3ERAS+9MRdB5JMGtiW17RvFbR/gqyRUs3X9iOe5H40uf0Q8DtDy31GpUX1mYLZ V0429OzvcD4W//SVbJgNTjPoDrdOuidfqPFGzninaSZh4WWuoPxFzYO1trimjQasNyNIG2ZZWxL oRxhj4kmTd5L5OLTTd95bxYDlEziww6m20cUyNxlrW5HwrN4a7H6bHVbr+DeZICT3nLj81MrAB9 OIUluKvuJnNJVHQfEKzpc5IXQ/Ud84P6Sa5Pf3ruNgxhM7G4SOZhSlTH7hQAAWwdrAE/lMNZs4i LraKpRBX8w8lKczVejQ== X-Authority-Analysis: v=2.4 cv=aPHAb79m c=1 sm=1 tr=0 ts=6a8d6332 cx=c_pps a=P2rfLEam3zuxRRdjJWA2cw==:117 a=PRfkaYvzSr8QmIIGAkY2Sg==:17 a=IkcTkHD0fZMA:10 a=Sv0fKeRqtYgA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=3WHJM1ZQz_JShphwDgj5:22 a=qjjNvQ9hGNcemuQZb4oA:9 a=QEXdDO2ut3YA:10 a=ODZdjJIeia2B_SHc_B0f:22 X-Proofpoint-Spam-Info: AW1haW4tMjYwODI1MDA4MSBTYWx0ZWRfX5llWn2r4eij9 abB9c+c+fW1MS+RTpM7qlc+MMmYgwgvIk2jfZanO99yc0EtVpE+vtR2XOarOj+jjUrsE8JH5Nei AhMWlPUq3vFJcvR/mA+10+apyeRzpho= X-Proofpoint-ORIG-GUID: zILlFxWiAbmYaS0REQ4-PPiFQ9mMcOdw X-Proofpoint-GUID: zILlFxWiAbmYaS0REQ4-PPiFQ9mMcOdw 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 phishscore=0 bulkscore=0 adultscore=0 malwarescore=0 clxscore=1015 impostorscore=0 lowpriorityscore=0 priorityscore=1501 suspectscore=0 spamscore=0 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