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[103.229.16.4]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-82379c22672sm18151053b3a.51.2026.02.03.01.42.01 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 03 Feb 2026 01:42:05 -0800 (PST) Message-ID: <09605e0f-6975-44c9-8f27-4b4301c412d2@oss.qualcomm.com> Date: Tue, 3 Feb 2026 17:41:59 +0800 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 1/3] dt-binding: document QCOM platforms for CTCU device To: Suzuki K Poulose , Konrad Dybcio , Mike Leach , James Clark , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Tingwei Zhang , Bjorn Andersson , Konrad Dybcio Cc: coresight@lists.linaro.org, linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org References: <20260203-enable-ctcu-and-etr-v1-0-a5371a2ec2b8@oss.qualcomm.com> <20260203-enable-ctcu-and-etr-v1-1-a5371a2ec2b8@oss.qualcomm.com> <6019b38d-3a15-41f5-989e-1f576c327446@oss.qualcomm.com> <6c823646-9085-409e-a692-ae3e77347742@oss.qualcomm.com> <5911fe77-fe2c-4321-96a9-a1b6b3b5d1e3@arm.com> Content-Language: en-US From: Jie Gan In-Reply-To: <5911fe77-fe2c-4321-96a9-a1b6b3b5d1e3@arm.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMjAzMDA3NiBTYWx0ZWRfXy26QR3bDQy97 TltnRq8khXfpBhrHGYj2l5RaexqZs2Xq8s2H+Q/r+Lyi8UYWr+9F1DsDs/9vvIM1d3veCrFb+d2 0GTZ47iH+ns9BCYdgxsRWVK9WqRFlB/cOyUhDJMMrSp9yqtViEKsorZCgW9v/FvPlMQD+ILUUgH f5ZUsyrlUsyyCSd59uJbSSZ+f79EWYcfo56tkZUP2UFMZXC68M2gNqgnbPvk6UHPAv5U7nhf6Bc pJuC61TxKM5TPkb2VnlGYgiH7IP90caPHk3RKyT5y4MxNQAdVBwmZ2JmzrUFZKf+twN3b9PMCtu HFIjr/d+Ckuj4c1eaZe282rwhYvRF7qKqO0+Qfbo3T3f6j9524X2/+Xz8ydhbtMZXyTJnZ2XWf0 TLVkTic+p4jh5cGE4/qgTGcxg0QXueHzk/I+zIohY+a6sWfbaQ9+NPVZmj7YYW/9CHzavhzHFKx N7CdIeJiZlqRqUwIheg== X-Authority-Analysis: v=2.4 cv=FrgIPmrq c=1 sm=1 tr=0 ts=6981c2ef cx=c_pps a=mDZGXZTwRPZaeRUbqKGCBw==:117 a=nuhDOHQX5FNHPW3J6Bj6AA==:17 a=IkcTkHD0fZMA:10 a=HzLeVaNsDn8A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=EUspDBNiAAAA:8 a=wkLu1GTWYP2ahK5n7AMA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=zc0IvFSfCIW2DFIPzwfm:22 X-Proofpoint-ORIG-GUID: 1ZIXlB-06m3DMo4uqpw2dcPvO_4qLzcR X-Proofpoint-GUID: 1ZIXlB-06m3DMo4uqpw2dcPvO_4qLzcR 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_03,2026-02-02_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 spamscore=0 clxscore=1015 priorityscore=1501 lowpriorityscore=0 suspectscore=0 phishscore=0 impostorscore=0 bulkscore=0 adultscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2601150000 definitions=main-2602030076 On 2/3/2026 5:31 PM, Suzuki K Poulose wrote: > On 03/02/2026 09:00, Jie Gan wrote: >> >> >> On 2/3/2026 4:50 PM, Konrad Dybcio wrote: >>> On 2/3/26 9:08 AM, Jie Gan wrote: >>>> Document the platforms that fallback to using the qcom,sa8775p-ctcu >>>> compatible for probing. >>>> >>>> Signed-off-by: Jie Gan >>>> --- >>>>   Documentation/devicetree/bindings/arm/qcom,coresight-ctcu.yaml | 4 >>>> ++++ >>>>   1 file changed, 4 insertions(+) >>>> >>>> diff --git a/Documentation/devicetree/bindings/arm/qcom,coresight- >>>> ctcu.yaml b/Documentation/devicetree/bindings/arm/qcom,coresight- >>>> ctcu.yaml >>>> index e002f87361ad..68853db52bef 100644 >>>> --- a/Documentation/devicetree/bindings/arm/qcom,coresight-ctcu.yaml >>>> +++ b/Documentation/devicetree/bindings/arm/qcom,coresight-ctcu.yaml >>>> @@ -29,6 +29,10 @@ properties: >>>>       oneOf: >>>>         - items: >>>>             - enum: >>>> +              - qcom,glymur-ctcu >>>> +              - qcom,hamoa-ctcu >>>> +              - qcom,kaanapali-ctcu >>>> +              - qcom,pakala-ctcu >>> >>> Platforms with existing numeric compatibles should continue to use them, >>> so that the mess is somewhat containable >> >> Sure Konrad. So for Pakala, I will change it back to qcom,sm8750-ctcu > > Why do we need different compatibles for the others ? Are they not all > compliant to the CTCU programming model ? i.e., sa8775p-ctcu ? or even, > a generic, > > qcom,coresight-ctcu Hi Suzuki, The platforms here have two ETR devices, using same "data" in driver. We also have platforms only contain one ETR device and we need create a new data for these platforms. I have proposed previously to have generic compatible for CTCU device but I got comment for preferring use platform-specific compatible. Is that acceptable to use qcom,coresight-ctcu-v1 for TWO ETR devices platform and qcom,coresight-ctcu-v2 for ONE ETR device platform? I think it's better to avoid annoying dt-binding patches for the CTCU device. Thanks, Jie > > Suzuki > > > >> >> Thanks, >> Jie >> >>> >>> Konrad >> >