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[79.54.86.139]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-482b14c3775sm10021606f8f.26.2026.08.20.02.17.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 20 Aug 2026 02:17:22 -0700 (PDT) From: Dario Binacchi To: linux-kernel@vger.kernel.org Cc: alexandre.torgue@foss.st.com, francesco.utel@engicam.com, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, domenico.acri@engicam.com, michael@amarulasolutions.com, linux-amarula@amarulasolutions.com, Dario Binacchi , Conor Dooley , Krzysztof Kozlowski , Maxime Coquelin , Rob Herring , devicetree@vger.kernel.org Subject: [PATCH v8 07/16] arm64: dts: st: add ltdc pins for stm32mp25 Date: Thu, 20 Aug 2026 11:12:15 +0200 Message-ID: <20260820091652.43541-8-dario.binacchi@amarulasolutions.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260820091652.43541-1-dario.binacchi@amarulasolutions.com> References: <20260820091652.43541-1-dario.binacchi@amarulasolutions.com> MIME-Version: 1.0 X-Original-Sender: dario.binacchi@amarulasolutions.com X-Original-Authentication-Results: mx.google.com; dkim=pass header.i=@amarulasolutions.com header.s=google header.b=hTrNGeo2; spf=pass (google.com: domain of dario.binacchi@amarulasolutions.com designates 209.85.220.41 as permitted sender) smtp.mailfrom=dario.binacchi@amarulasolutions.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=amarulasolutions.com; dara=neutral header.i=@amarulasolutions.com Content-Type: text/plain; charset="UTF-8" Precedence: list Mailing-list: list linux-amarula@amarulasolutions.com; contact linux-amarula+owners@amarulasolutions.com List-ID: X-Spam-Checked-In-Group: linux-amarula@amarulasolutions.com X-Google-Group-Id: 476853432473 List-Post: , List-Help: , List-Archive: List-Unsubscribe: , Add the LTDC pins used on MicroGEA-STM32MP257D-RMM board. Signed-off-by: Dario Binacchi --- (no changes since v5) Changes in v5: - Increase slew-rate to <1> to support the 27 MHz pixel clock and prevent timing violations. Suggested by Sashiko arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi | 71 +++++++++++++++++++ 1 file changed, 71 insertions(+) diff --git a/arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi b/arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi index db485b9ed904..50f454630cf2 100644 --- a/arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi +++ b/arch/arm64/boot/dts/st/stm32mp25-pinctrl.dtsi @@ -260,6 +260,77 @@ pins { }; }; + /omit-if-no-ref/ + ltdc_pins_a: ltdc-0 { + pins { + pinmux = , /* LCD_CLK */ + , /* LCD_HSYNC */ + , /* LCD_VSYNC */ + , /* LCD_DE */ + , /* LCD_R0 */ + , /* LCD_R1 */ + , /* LCD_R2 */ + , /* LCD_R3 */ + , /* LCD_R4 */ + , /* LCD_R5 */ + , /* LCD_R6 */ + , /* LCD_R7 */ + , /* LCD_G0 */ + , /* LCD_G1 */ + , /* LCD_G2 */ + , /* LCD_G3 */ + , /* LCD_G4 */ + , /* LCD_G5 */ + , /* LCD_G6 */ + , /* LCD_G7 */ + , /* LCD_B0 */ + , /* LCD_B1 */ + , /* LCD_B2 */ + , /* LCD_B3 */ + , /* LCD_B4 */ + , /* LCD_B5 */ + , /* LCD_B6 */ + ; /* LCD_B7 */ + bias-disable; + drive-push-pull; + slew-rate = <1>; + }; + }; + + /omit-if-no-ref/ + ltdc_sleep_pins_a: ltdc-sleep-0 { + pins { + pinmux = , /* LCD_CLK */ + , /* LCD_HSYNC */ + , /* LCD_VSYNC */ + , /* LCD_DE */ + , /* LCD_R0 */ + , /* LCD_R1 */ + , /* LCD_R2 */ + , /* LCD_R3 */ + , /* LCD_R4 */ + , /* LCD_R5 */ + , /* LCD_R6 */ + , /* LCD_R7 */ + , /* LCD_G0 */ + , /* LCD_G1 */ + , /* LCD_G2 */ + , /* LCD_G3 */ + , /* LCD_G4 */ + , /* LCD_G5 */ + , /* LCD_G6 */ + , /* LCD_G7 */ + , /* LCD_B0 */ + , /* LCD_B1 */ + , /* LCD_B2 */ + , /* LCD_B3 */ + , /* LCD_B4 */ + , /* LCD_B5 */ + , /* LCD_B6 */ + ; /* LCD_B7 */ + }; + }; + /omit-if-no-ref/ ospi_port1_clk_pins_a: ospi-port1-clk-0 { pins {