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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-6507bf6648fsm17277585a12.28.2026.01.12.02.54.37 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 12 Jan 2026 02:54:39 -0800 (PST) Message-ID: <36d3ead4-69c3-4bb5-b29f-25e9b7182618@oss.qualcomm.com> Date: Mon, 12 Jan 2026 11:54:37 +0100 Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 4/4] arm64: dts: qcom: Add base PURWA-IOT-EVK board To: Dmitry Baryshkov , Yijie Yang Cc: andersson@kernel.org, konradybcio@kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, krzysztof.kozlowski@oss.qualcomm.com References: <20260109-purwa-v2-0-f39ee10684cb@oss.qualcomm.com> <20260109080000.606603-4-yijie.yang@oss.qualcomm.com> <6e8e6583-033f-439e-bd92-b24fe432fb96@oss.qualcomm.com> <3959a318-aca3-43e2-a431-4a9ae40f911f@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-GUID: -L0saSf6YgdgsPQPBx0w0gSXuK1vZ4su X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMTEyMDA4NiBTYWx0ZWRfXyZM0eHLSqmBR LmmL+ILi8HkXjFOOrSK38hnOPkwDzolHunl8x+wTuNjjrUmmBfqQAl1I7BI3nJmOHHeqHTdrLMs wpqwSydvvuh3ONbWoh1qO77idT7whFJcsiMhj9CFoMCg1tWfx9/TlzCJQPMkhAuQQXZMiV/b7Fl l3DRlwv7SKAaZO4f3Dwb6Es92aG3IGJrbTRgAUdtGzoZmPkslx9gkl5lnEmADTBsi3tWC5ZjFja J0NWGrSRtBj7N0V0bXvUpBRgM5n/glUI0gIiuZhfIr5oriB2OEIW56pRb+83Z6Pfauz4YjTH/B1 C58V1M3tC8va6TIhRFNVykTUpH+k+2ulrtk4oMG15NAOYhwrXdR7ImQ6ldEhFXnf/52ywQ9UOg1 CDZ2XK7Hgs3w1BERFSruAkdWwTDAIuOg5JFZDzEYD1KgDRDh6uKXdzZ4DNkl9BHj9wM5g9eBrI5 MyByOJEd7BWK4MyPwHg== X-Proofpoint-ORIG-GUID: -L0saSf6YgdgsPQPBx0w0gSXuK1vZ4su X-Authority-Analysis: v=2.4 cv=C/XkCAP+ c=1 sm=1 tr=0 ts=6964d2f1 cx=c_pps a=EVbN6Ke/fEF3bsl7X48z0g==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=vUbySO9Y5rIA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=EUspDBNiAAAA:8 a=OTrRQFjmG71tW0adYG4A:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=a_PwQJl-kcHnX1M80qC6:22 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.100.49 definitions=2026-01-12_03,2026-01-09_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 malwarescore=0 spamscore=0 suspectscore=0 bulkscore=0 adultscore=0 lowpriorityscore=0 priorityscore=1501 phishscore=0 impostorscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2512120000 definitions=main-2601120086 On 1/12/26 7:01 AM, Dmitry Baryshkov wrote: > On Mon, 12 Jan 2026 at 07:51, Yijie Yang wrote: >> >> >> >> On 1/12/2026 1:00 PM, Dmitry Baryshkov wrote: >>> On Mon, Jan 12, 2026 at 11:12:09AM +0800, Yijie Yang wrote: >>>> >>>> >>>> On 1/9/2026 7:29 PM, Konrad Dybcio wrote: >>>>> On 1/9/26 8:59 AM, YijieYang wrote: >>>>>> From: Yijie Yang >>>>>> >>>>>> The PURWA-IOT-EVK is an evaluation platform for IoT products, composed of >>>>>> the Purwa IoT SoM and a carrier board. Together, they form a complete >>>>>> embedded system capable of booting to UART. >>>>> >>>>> [...] >>>>> >>>>>> - backlight: backlight { >>>>>> - compatible = "pwm-backlight"; >>>>>> - pwms = <&pmk8550_pwm 0 5000000>; >>>>>> - enable-gpios = <&pmc8380_3_gpios 4 GPIO_ACTIVE_HIGH>; >>>>>> - power-supply = <&vreg_edp_bl>; >>>>>> - >>>>>> - pinctrl-0 = <&edp_bl_en>, <&edp_bl_pwm>; >>>>>> - pinctrl-names = "default"; >>>>>> - }; >>>>> >>>>> Is the backlight infra different on the Purwa IoT EVK? >>>> >>>> As you can see, this Purwa file was copied from the latest >>>> hamoa-iot-evk.dts. However, not all nodes have been verified on Purwa. >>>> Therefore, I need to retain only the functions that work correctly and keep >>>> them aligned with the nodes from my initial version. The deleted nodes will >>>> be updated later by the respective authors from different technical areas. >>> >>> Please, only delete nodes which are not present on the Purwa IoT EVK. >> >> This isn’t a deletion—it’s just not ready yet. Why do we need to include >> all the nodes like a mature Hamoa platform in the initial push? > > Purwa seems to be mature enough. What exactly can't be enabled at this moment? Right, I'm in the same camp. Since you already have the board at your disposal (because I trust you tested this patchset on hardware), why not spend the extra 5-10 minutes verifying that e.g. the display lights up and you can control its brightness? Konrad