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Mon, 02 Nov 2026 09:45:24 -0800 (PST) Received: from server.lan ([168.138.199.194]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-36a42935b4asm53290803eec.16.2026.11.02.09.45.20 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 02 Nov 2026 09:45:23 -0800 (PST) From: Coia Prant To: Heiko Stuebner Cc: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Andrew Lunn , Frank Wunderlich , Peter Geis , Junhao Xie , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org, Coia Prant Subject: [PATCH v3 6/6] arm64: dts: rockchip: fix modem power supply topology on Photonicat Date: Tue, 3 Nov 2026 01:44:50 +0800 Message-ID: <20261102174450.3000397-7-coiaprant@gmail.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20261102174450.3000397-1-coiaprant@gmail.com> References: <20261102174450.3000397-1-coiaprant@gmail.com> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit The vcc3v4_rf regulator supplies the M.2 B-Key 5G modem. It was incorrectly modeled as being supplied by vccin_5v (the external DC input, before the main power switch). Per the schematic, VCC3V4_RF is actually derived from VCC_SYSON (the main system power rail after the power switch Q5013) via a ferrite bead (B1). Change the vin-supply of vcc3v4_rf to vcc_syson to accurately reflect the hardware topology. While both vccin_5v and vcc_syson are always-on fixed regulators without runtime GPIO control, this ensures the DT power tree matches the schematic and traces the modem's power path correctly. It also clarifies that the modem relies on the main system rail rather than the external DC input directly. Link: https://github.com/photonicat/photonicat-hardware/blob/main/Photonicat_rk3568_sch_20221116.pdf (Page 18) Fixes: ba124e06ce7b ("arm64: dts: rockchip: add dts for Ariaboard Photonicat RK3568") Signed-off-by: Coia Prant --- arch/arm64/boot/dts/rockchip/rk3568-photonicat.dts | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm64/boot/dts/rockchip/rk3568-photonicat.dts b/arch/arm64/boot/dts/rockchip/rk3568-photonicat.dts index 290e3ee97c709..6ba70e5d9037e 100644 --- a/arch/arm64/boot/dts/rockchip/rk3568-photonicat.dts +++ b/arch/arm64/boot/dts/rockchip/rk3568-photonicat.dts @@ -177,7 +177,7 @@ vcc3v4_rf: regulator-vcc3v4-rf { regulator-name = "vcc3v4_rf"; regulator-min-microvolt = <3400000>; regulator-max-microvolt = <3400000>; - vin-supply = <&vccin_5v>; + vin-supply = <&vcc_syson>; }; vcc5v0_usb30_otg0: regulator-vcc5v0-usb30-otg0 { -- 2.47.3