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[103.229.18.19]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2a7193dd582sm10446495ad.52.2026.01.15.22.17.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 15 Jan 2026 22:17:57 -0800 (PST) Date: Fri, 16 Jan 2026 11:47:52 +0530 From: Varadarajan Narayanan To: Sumit Garg Cc: Bjorn Andersson , Krzysztof Kozlowski , konradybcio@kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] arm64: dts: qcom: ipq9574: Enable eMMC variant Message-ID: References: <20260102104638.3802715-1-varadarajan.narayanan@oss.qualcomm.com> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Authority-Analysis: v=2.4 cv=JNg2csKb c=1 sm=1 tr=0 ts=6969d817 cx=c_pps a=UNFcQwm+pnOIJct1K4W+Mw==:117 a=Ou0eQOY4+eZoSc0qltEV5Q==:17 a=kj9zAlcOel0A:10 a=vUbySO9Y5rIA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=zoyPwqoJC1DFbwO7Ze0A:9 a=CjuIK1q_8ugA:10 a=uKXjsCUrEbL0IQVhDsJ9:22 X-Proofpoint-ORIG-GUID: DMb0OwEPv7VwRu_jd8TUx7LNTSqA299k X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMTE2MDA0OSBTYWx0ZWRfXyJhAzAoiNIoG aPFrPeEA5ex64V4kQThoPGHS7LDv2iNsz9lYFAHt/JrZrXa6EVn7XTj+HUay3r1PFlPCuVyVo5u Q3Ewi2CZfzK/utl91SycO20L0wq0lGLFBk+my4B1fjODcxoLZsm2W1NpuDAu1r9+rH3jGO6b/qV 3yGrJSvIaJB8cz5P8C5y2dvtZJcuKe6gwdTzVqgcR+LvwX4VnDWwjhsrirdIvhDF14ih9tg6wJ3 gTOPG4hzISWIgNdVgMIXe9rJNNUf2C5D/Hg6fqmMpxUlJ1fW5FzuYnvtHv8JGQp6xI93sQPwM5s ffG/f8gIvrGEq2yApss34ogv2kDgFCw0HQyWHsRcT3VL/jD5SsXqBF3HfJFbG2E/a2uN3OYmFdP tAa067o7oZ6MSuoeeqApjT8pxCEjOBpbzLoWIPnC3jYfJFP66DaKeTKIok8kS/jwZdG2/r6JOvR eWmMLeCCDGdp/2OjCjw== X-Proofpoint-GUID: DMb0OwEPv7VwRu_jd8TUx7LNTSqA299k 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=2026-01-16_02,2026-01-15_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 malwarescore=0 adultscore=0 suspectscore=0 priorityscore=1501 bulkscore=0 lowpriorityscore=0 clxscore=1015 impostorscore=0 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2512120000 definitions=main-2601160049 [ . . . ] > > > > +/* > > > > + * IPQ9574 RDP433 eMMC board variant device tree source > > > > + * > > > > + * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries. > > > > + */ > > > > + > > > > +/dts-v1/; > > > > + > > > > +#include "ipq9574-rdp433.dts" > > > > > > I find it discouraged practice. Although if Bjorn is fine with it, you > > > still need proper compatibles. > > > > > > > Nah, I don't fancy including .dts files. But I do see that I've let a > > few of those slip by over the years. > > > > The general approach for these cases has been to rename dts->dtsi and > > create the two dts files. > > That sounds better to me. > > > > > I wonder though if this would be better served by an overlay, as it's > > the same board, but with modifications applied? > > I am not sure how overlay is a better fit here. AFAIK, the DT overlay is > generally used for plug and play hardware mezzanines. But here we are > dealing with the default boot medium which can either be eMMC or NAND. > Can a developer easily reverse the board modifications to boot from a > different medium? > > And this DT is not only going to be consumed by the kernel but rather > the bootloader (U-Boot) in this case where there isn't a concept of DT > overlays which the prior stage can apply. Bjorn/Dmitry/Sumit, Will proceed with separate dts approach. Please let me know if that is not ok. Thanks Varada