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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-b07b32f2098sm337290866b.74.2025.09.12.02.21.56 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 12 Sep 2025 02:21:58 -0700 (PDT) Message-ID: Date: Fri, 12 Sep 2025 11:21:55 +0200 Precedence: bulk X-Mailing-List: linux-clk@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v5 02/10] dt-bindings: clock: Add required "interconnect-cells" property To: Krzysztof Kozlowski , Luo Jie Cc: Bjorn Andersson , Michael Turquette , Stephen Boyd , Varadarajan Narayanan , Georgi Djakov , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Anusha Rao , Manikanta Mylavarapu , Devi Priya , Philipp Zabel , Richard Cochran , Konrad Dybcio , Catalin Marinas , Will Deacon , linux-arm-msm@vger.kernel.org, linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, devicetree@vger.kernel.org, netdev@vger.kernel.org, linux-arm-kernel@lists.infradead.org, quic_kkumarcs@quicinc.com, quic_linchen@quicinc.com, quic_leiwei@quicinc.com, quic_pavir@quicinc.com, quic_suruchia@quicinc.com References: <20250909-qcom_ipq5424_nsscc-v5-0-332c49a8512b@quicinc.com> <20250909-qcom_ipq5424_nsscc-v5-2-332c49a8512b@quicinc.com> <20250912-nocturnal-horse-of-acumen-5b2cbd@kuoka> <2951b362-c3c1-4608-8534-4d25b089f927@oss.qualcomm.com> <52714c33-5bd7-4ca5-bf1d-c89318c77746@linaro.org> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <52714c33-5bd7-4ca5-bf1d-c89318c77746@linaro.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Authority-Analysis: v=2.4 cv=aPDwqa9m c=1 sm=1 tr=0 ts=68c3e638 cx=c_pps a=EVbN6Ke/fEF3bsl7X48z0g==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=yJojWOMRYYMA:10 a=UDPjpuflI1CVcGcpNKsA:9 a=QEXdDO2ut3YA:10 a=a_PwQJl-kcHnX1M80qC6:22 X-Proofpoint-GUID: V2GJMdJrKE6jZb0Lf5NZQwLdJ__BAQQ8 X-Proofpoint-ORIG-GUID: V2GJMdJrKE6jZb0Lf5NZQwLdJ__BAQQ8 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwOTExMDA0MCBTYWx0ZWRfXzfpppcDoj75j Z4azyIIBXfqzdzN9ucLHXVXblBUwZuftGvpa0RySwQMI4A9gFWlyeusMy0Wk792xy/lc5UTKVid iztzqcDY7WqKe603X9HeMpj7Ik+F+dfzbDQOKx7kdZ0QBrNOzlgc0Pg+Y3DBUudOGXmQ399o+Av Z+5WzSHE8nI/wRGSYZBBV+ecGmGuEqg0buN0wN6X6dLH+YbjOmSKUlWItUL9GQNTPNufsl2X7O2 NZxXbQZwJ0F+iYIHPzxr61227qTiIMkBy9I169JlvsM5WVjkgF908X/p2pP4X4J7k/futzX0mzx kdN0eKg3MxTYdRt32CbOoSizlsGrY5LsWmsTub1VKHaLD2UiQS6QPuBka8E6wjqFLtVpPFuf8XT nHZixkzS X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1117,Hydra:6.1.9,FMLib:17.12.80.40 definitions=2025-09-12_03,2025-09-11_02,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 phishscore=0 impostorscore=0 malwarescore=0 bulkscore=0 clxscore=1015 spamscore=0 suspectscore=0 adultscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2507300000 definitions=main-2509110040 On 9/12/25 11:17 AM, Krzysztof Kozlowski wrote: > On 12/09/2025 11:13, Konrad Dybcio wrote: >> On 9/12/25 11:13 AM, Konrad Dybcio wrote: >>> On 9/12/25 9:04 AM, Krzysztof Kozlowski wrote: >>>> On Tue, Sep 09, 2025 at 09:39:11PM +0800, Luo Jie wrote: >>>>> The Networking Subsystem (NSS) clock controller acts as both a clock >>>>> provider and an interconnect provider. The #interconnect-cells property >>>>> is mandatory in the Device Tree Source (DTS) to ensure that client >>>>> drivers, such as the PPE driver, can correctly acquire ICC clocks from >>>>> the NSS ICC provider. >>>>> >>>>> Although this property is already present in the NSS CC node of the DTS >>>>> for CMN PLL for IPQ9574 SoC which is currently supported, it was previously >>>>> omitted from the list of required properties in the bindings documentation. >>>>> Adding this as a required property is not expected to break the ABI for >>>>> currently supported SoC. >>>>> >>>>> Marking #interconnect-cells as required to comply with Device Tree (DT) >>>>> binding requirements for interconnect providers. >>>> >>>> DT bindings do not require interconnect-cells, so that's not a correct >>>> reason. Drop them from required properties. >>> >>> "Mark #interconnect-cells as required to allow consuming the provided >>> interconnect endpoints"? >> >> "which are in turn necessary for the SoC to function" > > If this never worked and code was buggy, never booted, was sent > incomplete and in junk state, then sure. Say like that. :) > > But I have a feeling code was working okayish... If Linux is unaware of resources, it can't turn them off/on, so it was only working courtesy of the previous boot stages messing with them. Konrad