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Tue, 03 Feb 2026 21:43:58 -0800 (PST) X-Received: by 2002:a05:6a00:4c92:b0:81f:4c37:7647 with SMTP id d2e1a72fcca58-8241c79edfamr1857609b3a.68.1770183838024; Tue, 03 Feb 2026 21:43:58 -0800 (PST) Received: from [10.218.32.171] ([202.46.22.19]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-8241d4a5c28sm1239114b3a.62.2026.02.03.21.43.52 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 03 Feb 2026 21:43:57 -0800 (PST) Message-ID: Date: Wed, 4 Feb 2026 11:13:50 +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> <6e5924f2-a9e0-45db-8a79-b328ebd12a0d@oss.qualcomm.com> Content-Language: en-US From: Praveen Talari In-Reply-To: <6e5924f2-a9e0-45db-8a79-b328ebd12a0d@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Proofpoint-ORIG-GUID: 7Ld0oFTmPe6N6MaA8C6rw2FdS3Xn5mRk X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMjA0MDAzOSBTYWx0ZWRfXwPnqlWcujNAQ UNhPBgcXz3wJrektY9b+g4Juxu1yCaWMML8LNt/NpHVjQkdTPXyfjmKcKd8i+013Or6q8XAXnzq 9foW0O3xfsPSIuzkMMiS8KOtWK+slcB+G//ig/sakeMeJ8VAH9zcvF1U/k3BRrOs3QzADwc+esT eHLoEjFeS0t+kkEH2ki0Mkc8Xz2NTKgUh0eNo4hF3arV1Pof4iyjHx1ccSSeB8QzGM+pRNcljQc L8j0vYvLzKokpJG1huBCjRaYs/1HbPG4lFvYtREphAtTgaOrg+aindABsv8R74AO3X9lMB1BTnp J0AjFZyq7UOwAN5ZnTHwYW84mnrOMAjgJUsrceG0dQXA9xirIIFTRmltvlCMGdCV+dz95FpQeaa Emi/9Kt1rToD4chwIEBA7z338391utJhKR1bhxOj9rXq7G4ulOOh6tnR/IqEigFCGUqHLUdKLAE fp5chifWzfwZS/qlhGw== X-Authority-Analysis: v=2.4 cv=TZmbdBQh c=1 sm=1 tr=0 ts=6982dc9f cx=c_pps a=mDZGXZTwRPZaeRUbqKGCBw==:117 a=fChuTYTh2wq5r3m49p7fHw==:17 a=IkcTkHD0fZMA:10 a=HzLeVaNsDn8A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=WgL0-2sr_UKP2Gu6nnoA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=zc0IvFSfCIW2DFIPzwfm:22 X-Proofpoint-GUID: 7Ld0oFTmPe6N6MaA8C6rw2FdS3Xn5mRk 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=2026-02-03_07,2026-02-03_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 priorityscore=1501 suspectscore=0 lowpriorityscore=0 bulkscore=0 phishscore=0 clxscore=1015 spamscore=0 adultscore=0 malwarescore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2601150000 definitions=main-2602040039 Hi Konrad, On 2/2/2026 8:23 PM, Konrad Dybcio wrote: > On 1/30/26 5:44 PM, Praveen Talari wrote: >> 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. > > Does that handle the >1 pd case too? If so, then all good Yes, Thanks, Praveen Talari > > Konrad