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Tue, 05 May 2026 03:14:56 -0700 (PDT) Received: from wenstp920.tpe.corp.google.com ([2a00:79e0:201d:8:f1d4:2ef0:7d08:9dd8]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-839679c8462sm1666121b3a.38.2026.05.05.03.14.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 05 May 2026 03:14:55 -0700 (PDT) From: Chen-Yu Tsai To: Matthias Brugger , AngeloGioacchino Del Regno Cc: Chen-Yu Tsai , linux-mediatek@lists.infradead.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 13/16] arm64: dts: mediatek: mt8195-cherry: Add supply for SPI NOR flash Date: Tue, 5 May 2026 18:14:03 +0800 Message-ID: <20260505101408.1796563-14-wenst@chromium.org> X-Mailer: git-send-email 2.54.0.545.g6539524ca2-goog In-Reply-To: <20260505101408.1796563-1-wenst@chromium.org> References: <20260505101408.1796563-1-wenst@chromium.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260505_111457_664037_EF659955 X-CRM114-Status: GOOD ( 12.37 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The SPI NOR flash is powered by a separate "always on" 1.8V LDO regulated power rail. This rail is fed from the system 3.3V rail. Signed-off-by: Chen-Yu Tsai --- Changes since v1: - New patch --- arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi b/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi index dc1ba143ccf2..62e2d7616f20 100644 --- a/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi +++ b/arch/arm64/boot/dts/mediatek/mt8195-cherry.dtsi @@ -47,6 +47,17 @@ memory@40000000 { reg = <0 0x40000000 0 0x80000000>; }; + /* system critical LDO 1.8V power rail */ + pp1800_ldo_z2: regulator-pp1800-ldo-z2 { + compatible = "regulator-fixed"; + regulator-name = "pp1800_ldo_z2"; + regulator-always-on; + regulator-boot-on; + regulator-min-microvolt = <3300000>; + regulator-max-microvolt = <3300000>; + vin-supply = <&pp3300_z2>; + }; + pp3300_disp_x: regulator-pp3300-disp-x { compatible = "regulator-fixed"; regulator-name = "pp3300_disp_x"; @@ -762,6 +773,7 @@ flash@0 { spi-max-frequency = <52000000>; spi-rx-bus-width = <2>; spi-tx-bus-width = <2>; + vcc-supply = <&pp1800_ldo_z2>; }; }; -- 2.54.0.545.g6539524ca2-goog