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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-59e07481b5asm3638004e87.19.2026.02.02.06.53.54 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 02 Feb 2026 06:53:56 -0800 (PST) Message-ID: <6e5924f2-a9e0-45db-8a79-b328ebd12a0d@oss.qualcomm.com> Date: Mon, 2 Feb 2026 15:53:53 +0100 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: Praveen Talari , 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: Konrad Dybcio In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Proofpoint-ORIG-GUID: 3ksldkQWmzWtjnV7tIKEU6jjYxLdstno X-Authority-Analysis: v=2.4 cv=VJ/QXtPX c=1 sm=1 tr=0 ts=6980ba86 cx=c_pps a=oc9J++0uMp73DTRD5QyR2A==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=HzLeVaNsDn8A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=Hn_5opO5PlqZgVx7yE0A:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=iYH6xdkBrDN1Jqds4HTS:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMjAyMDExNyBTYWx0ZWRfXxzT+9D9mIWQ+ m6IxcPlJ3yL3Uyj9tnWwN06nRYwGLeVHmRdSfTN53hKiiggVotW0OFc2KgDRtO2k/82JksO67p6 80CKbFXQ5aY8eBQJ7a7SaVZ2NIETm4OKSyoCzp/UCRBCfs7ZSoPygCZFvgBLxp6iT7zdZ1fGWXJ /jrCfbVvirjff9AVwQqy/gZsbvUaFa5AQNwFAzl4MGEsv2SLXXEu8DrLRdp8tvDRaQK7KiTq7tE v36rhdXlD/xm81TzCiB30A8n2HAtupyrWXrIYqw9uNejHiG3gCqAHnF1iOJBvfydzpmJkjIoehK G3vUoXgV9FraFYQeRolv39t0tZe9HXv1GIogduVADpNaeXsp4v9fkfo8NoLlrDdZPGmWkbZAQbL 3Ff2HmS7kRGebBUoGp7at85FcWwPfGdW7ZDCC7XH2hnC5sDlZpDLGIkEEc6RSVPAPRDRs9Kt7EU B0LYi2digNTbMhHl2bg== X-Proofpoint-GUID: 3ksldkQWmzWtjnV7tIKEU6jjYxLdstno 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=2026-02-02_04,2026-01-30_04,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 adultscore=0 malwarescore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 phishscore=0 priorityscore=1501 impostorscore=0 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2601150000 definitions=main-2602020117 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 Konrad