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Fri, 30 Jan 2026 08:44:23 -0800 (PST) X-Received: by 2002:a17:902:ef43:b0:296:2b7a:90cd with SMTP id d9443c01a7336-2a8d990aaebmr36988745ad.32.1769791462739; Fri, 30 Jan 2026 08:44:22 -0800 (PST) Received: from [192.168.1.7] ([49.204.111.90]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2a88b5d9e25sm83063825ad.80.2026.01.30.08.44.15 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 30 Jan 2026 08:44:22 -0800 (PST) Message-ID: Date: Fri, 30 Jan 2026 22:14:12 +0530 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 12/12] i2c: qcom-geni: Enable I2C on SA8255p Qualcomm platforms To: Konrad Dybcio , Andi Shyti , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Mukesh Kumar Savaliya , Viken Dadhaniya , Bjorn Andersson , Konrad Dybcio , linux-arm-msm@vger.kernel.org, linux-i2c@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, bryan.odonoghue@linaro.org, dmitry.baryshkov@oss.qualcomm.com, bjorn.andersson@oss.qualcomm.com Cc: prasad.sodagudi@oss.qualcomm.com, quic_vtanuku@quicinc.com, aniket.randive@oss.qualcomm.com, chandana.chiluveru@oss.qualcomm.com References: <20260112104722.591521-1-praveen.talari@oss.qualcomm.com> <20260112104722.591521-13-praveen.talari@oss.qualcomm.com> <8e410852-37f2-452b-b851-19b7c4222727@oss.qualcomm.com> Content-Language: en-US From: Praveen Talari In-Reply-To: <8e410852-37f2-452b-b851-19b7c4222727@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Proofpoint-ORIG-GUID: Hj0paIZtSeb6WvgeHRETJFF5z11wojOp X-Proofpoint-GUID: Hj0paIZtSeb6WvgeHRETJFF5z11wojOp X-Authority-Analysis: v=2.4 cv=VMTQXtPX c=1 sm=1 tr=0 ts=697cdfe8 cx=c_pps a=JL+w9abYAAE89/QcEU+0QA==:117 a=10aD+GSAjGS7IfLbEAHBKg==:17 a=IkcTkHD0fZMA:10 a=vUbySO9Y5rIA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=hbV_D0MF1U8yBtKqu6sA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=324X-CrmTo6CU4MGRt3R:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMTMwMDEzNyBTYWx0ZWRfX2Ok53VMQKXlL 0rkiyc9fhbNFfzl3WdeaPyrE0C41dtZOVhgLM3esGC5Kf0S9seTpUl81wloVP3l9d7lIrm2YgfM 1owacxi6geyQwRD82vZvGgEF+ZpU1PGryfmHs6bvXcUTShN+MmWpFQlYuvWl7tGZ4qrztwm1DWg hxp/prcJrCtgeMT31SZPIW9v9RTvNYsNPdj4sJAZSmBbKcAjV2GZcbj4Tti5fBtDcuHe1c0MZln zh6prymEP0tp2qPTzJ4dzNx6LTpZRJrrsK9F37JamIokd6GVYPb/zxR2r4de/TzP9HnZSv7DeEg G9FCPAIt/fcz28ulMDDYMzioVIiiKL8ya2BY4Tt4qWz+M8VFxTBBoE9HuwEYv+omAEYu7orgf46 d+fWyTY9EP7qrfDwl2K8eqLTL0sEMToo6XHd38PWAhFl+qgQYFOTzpGuUGzE41OUhQ4qKcGGnYG wKu3f2XdtR7LrNq71vg== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-01-30_02,2026-01-30_03,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 priorityscore=1501 bulkscore=0 lowpriorityscore=0 impostorscore=0 adultscore=0 phishscore=0 suspectscore=0 spamscore=0 malwarescore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2601150000 definitions=main-2601300137 Hi Konrad, On 1/30/2026 6:04 PM, Konrad Dybcio wrote: >> +static const struct geni_i2c_desc sa8255p_geni_i2c = { >> + .resources_init = geni_se_domain_attach, >> + .set_rate = geni_se_set_perf_opp, > This means, on SCMI devices you won't don't the vote on the POWER > domain (or PERF for that matter) and switch the GPIOs to a _suspend > state - is that by design? With PD_FLAG_DEV_LINK_ON enabled, every pm_runtime_get_sync() or pm_runtime_put_sync() on the device triggers a corresponding genpd on/off transition. These transitions are translated into SCMI power‑domain commands, allowing the firmware (GearVM) to perform the actual enable/disable sequencing. Thanks, Praveen.