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Mon, 02 Nov 2026 09:19:20 -0800 (PST) Received: from server.lan ([168.138.199.194]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-36a429467cdsm36978047eec.19.2026.11.02.09.19.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 02 Nov 2026 09:19:20 -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 v2 6/6] arm64: dts: rockchip: fix modem power supply on Photonicat Date: Tue, 3 Nov 2026 01:18:38 +0800 Message-ID: <20261102171838.2958552-7-coiaprant@gmail.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20261102171838.2958552-1-coiaprant@gmail.com> References: <20261102171838.2958552-1-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). As a result, the modem loses power when the board runs on battery. Per the schematic, VCC3V4_RF is actually derived from VCC_SYSON (the main system power rail after the power switch) via a ferrite bead (B1). Change the vin-supply of vcc3v4_rf to vcc_syson to match the hardware topology. This ensures the modem remains powered in both DC and battery modes. 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 11ac78acca3be..02d445d7968fe 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