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[79.54.86.139]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-482b14c3775sm10021606f8f.26.2026.08.20.02.17.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 20 Aug 2026 02:17:44 -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 15/16] arm64: dts: st: support Engicam MicroGEA-STM32MP257D-RMM board Date: Thu, 20 Aug 2026 11:12:23 +0200 Message-ID: <20260820091652.43541-16-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=gm5v1uOA; 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: , Support for Engicam MicroGEA-STM32MP257D-RMM board with: - 8 GB eMMC Flash - 2 GB LPDDR4 DRAM - CAN - LEDs - LCD panel with touchscreen - Micro SD card connector - Audio codec - Buzzer Signed-off-by: Dario Binacchi --- Changes in v8: - Rename stm32mp257-engicam-microgea-rmm.dts to stm32mp257d-engicam-microgea-rmm.dts and update the Makefile entry accordingly. - Rename the board compatible engicam,microgea-stm32mp257-rmm to engicam,microgea-stm32mp257d-rmm. Changes in v5: - Fix touchscreen resolution to 480x854 - Fix SPI1 CS0 polarity to GPIO_ACTIVE_LOW Changes in v2: - Drop the clocks property from the sai1 node in stm32mp257-engicam-microgea-rmm.dts to avoid overriding the peripheral bus clock reference defined in the base SoC device tree. Suggested by Sashiko. - Reference the existing labeled nodes directly at the root level using &sai1a and &sai1b in stm32mp257-engicam-microgea-rmm.dts instead of redefining the entire node structure and redeclaring the labels. Suggested by Sashiko. - Drop the #clock-cells property from sai1a and remove the reference to sai1a from the clocks array in sai1b, relying strictly on the st,sync property to handle internal synchronization. arch/arm64/boot/dts/st/Makefile | 1 + .../st/stm32mp257d-engicam-microgea-rmm.dts | 319 ++++++++++++++++++ 2 files changed, 320 insertions(+) create mode 100644 arch/arm64/boot/dts/st/stm32mp257d-engicam-microgea-rmm.dts diff --git a/arch/arm64/boot/dts/st/Makefile b/arch/arm64/boot/dts/st/Makefile index 63908113ae36..6cbccfd50993 100644 --- a/arch/arm64/boot/dts/st/Makefile +++ b/arch/arm64/boot/dts/st/Makefile @@ -2,5 +2,6 @@ dtb-$(CONFIG_ARCH_STM32) += \ stm32mp215f-dk.dtb \ stm32mp235f-dk.dtb \ + stm32mp257d-engicam-microgea-rmm.dtb \ stm32mp257f-dk.dtb \ stm32mp257f-ev1.dtb diff --git a/arch/arm64/boot/dts/st/stm32mp257d-engicam-microgea-rmm.dts b/arch/arm64/boot/dts/st/stm32mp257d-engicam-microgea-rmm.dts new file mode 100644 index 000000000000..f5af0913bf1b --- /dev/null +++ b/arch/arm64/boot/dts/st/stm32mp257d-engicam-microgea-rmm.dts @@ -0,0 +1,319 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2026 Amarula Solutions, Dario Binacchi + * Copyright (C) 2026 Engicam srl + */ + +/dts-v1/; + +#include +#include +#include + +#include "stm32mp257-engicam-microgea.dtsi" + +/ { + model = "Engicam MicroGEA STM32MP257D RMM Board"; + compatible = "engicam,microgea-stm32mp257d-rmm", + "engicam,microgea-stm32mp257", "st,stm32mp257"; + + aliases { + mmc0 = &sdmmc1; + mmc1 = &sdmmc2; + serial0 = &usart2; + serial1 = &usart1; + }; + + backlight: backlight { + compatible = "pwm-backlight"; + brightness-levels = <0 100>; + num-interpolated-steps = <100>; + default-brightness-level = <85>; + pwms = <&pwm2 0 100000 0>; + }; + + buzzer { + compatible = "pwm-beeper"; + pwms = <&pwm4 0 1000000 0>; + }; + + chosen { + stdout-path = "serial0:115200n8"; + #address-cells = <2>; + #size-cells = <2>; + ranges; + + framebuffer { + compatible = "simple-framebuffer"; + clocks = <&rcc CK_BUS_LTDC>, <&rcc CK_KER_LTDC>; + lcd-supply = <®_3v3>; + status = "disabled"; + }; + }; + + leds { + compatible = "gpio-leds"; + + led-0 { + gpios = <&gpioh 2 GPIO_ACTIVE_HIGH>; + default-state = "off"; + status = "okay"; + }; + + led-1 { + gpios = <&gpioh 6 GPIO_ACTIVE_HIGH>; + default-state = "off"; + status = "okay"; + }; + }; + + mclk: clock-mclk { + compatible = "fixed-clock"; + #clock-cells = <0>; + clock-frequency = <24000000>; + }; + + reg_1v8: regulator-1v8 { + compatible = "regulator-fixed"; + regulator-name = "1v8"; + regulator-min-microvolt = <1800000>; + regulator-max-microvolt = <1800000>; + }; + + reg_3v3: regulator-3v3 { + compatible = "regulator-fixed"; + regulator-name = "3v3"; + regulator-min-microvolt = <3300000>; + regulator-max-microvolt = <3300000>; + }; + + reg_ext_pwr: regulator-ext-pwr { + compatible = "regulator-fixed"; + regulator-name = "ext-pwr"; + regulator-min-microvolt = <5000000>; + regulator-max-microvolt = <5000000>; + gpio = <&gpiog 0 GPIO_ACTIVE_HIGH>; + enable-active-high; + regulator-always-on; + }; + + sound { + compatible = "audio-graph-card"; + label = "STM32MP25-RMM"; + widgets = "Headphone", "Headphone Jack", + "Microphone", "Microphone Jack"; + routing = "Headphone Jack", "HP_OUT", + "MIC_IN", "Microphone Jack", + "Microphone Jack", "Mic Bias"; + dais = <&sai1a_port &sai1b_port>; + status = "okay"; + }; +}; + +&arm_wdt { + timeout-sec = <32>; + status = "okay"; +}; + +&i2c1 { + pinctrl-names = "default", "sleep"; + pinctrl-0 = <&i2c1_pins_a>; + pinctrl-1 = <&i2c1_sleep_pins_a>; + i2c-scl-rising-time-ns = <185>; + i2c-scl-falling-time-ns = <20>; + status = "okay"; + /* spare dmas for other usage */ + /delete-property/dmas; + /delete-property/dma-names; + + touchscreen@38 { + compatible = "edt,edt-ft5306"; + reg = <0x38>; + interrupt-parent = <&gpiob>; + interrupts = <0 IRQ_TYPE_EDGE_FALLING>; + reset-gpios = <&gpiod 1 GPIO_ACTIVE_LOW>; + touchscreen-size-x = <480>; + touchscreen-size-y = <854>; + }; +}; + +&i2c2 { + pinctrl-names = "default", "sleep"; + pinctrl-0 = <&i2c2_pins_a>; + pinctrl-1 = <&i2c2_sleep_pins_a>; + i2c-scl-rising-time-ns = <185>; + i2c-scl-falling-time-ns = <20>; + status = "okay"; + /* spare dmas for other usage */ + /delete-property/dmas; + /delete-property/dma-names; + + sgtl5000: codec@a { + compatible = "fsl,sgtl5000"; + reg = <0x0a>; + #sound-dai-cells = <0>; + clocks = <&mclk>; + + VDDA-supply = <®_3v3>; + VDDIO-supply = <®_3v3>; + VDDD-supply = <®_1v8>; + + sgtl5000_port: port { + #address-cells = <1>; + #size-cells = <0>; + + sgtl5000_tx_endpoint: endpoint@0 { + reg = <0>; + remote-endpoint = <&sai1a_endpoint>; + frame-master = <&sgtl5000_tx_endpoint>; + bitclock-master = <&sgtl5000_tx_endpoint>; + }; + + sgtl5000_rx_endpoint: endpoint@1 { + reg = <1>; + remote-endpoint = <&sai1b_endpoint>; + frame-master = <&sgtl5000_rx_endpoint>; + bitclock-master = <&sgtl5000_rx_endpoint>; + }; + }; + }; +}; + +<dc { + pinctrl-names = "default", "sleep"; + pinctrl-0 = <<dc_pins_a>; + pinctrl-1 = <<dc_sleep_pins_a>; + status = "okay"; + + port { + ltdc_out: endpoint { + remote-endpoint = <&panel_in>; + }; + }; +}; + +&m_can1 { + pinctrl-names = "default", "sleep"; + pinctrl-0 = <&m_can1_pins_a>; + pinctrl-1 = <&m_can1_sleep_pins_a>; + status = "okay"; +}; + +&sai1 { + pinctrl-names = "default", "sleep"; + pinctrl-0 = <&sai1a_pins_a>, <&sai1b_pins_a>; + pinctrl-1 = <&sai1a_sleep_pins_a>, <&sai1b_sleep_pins_a>; + status = "okay"; +}; + +&sai1a { + dma-names = "tx"; + status = "okay"; + + sai1a_port: port { + sai1a_endpoint: endpoint { + remote-endpoint = <&sgtl5000_tx_endpoint>; + dai-format = "i2s"; + mclk-fs = <512>; + }; + }; +}; + +&sai1b { + dma-names = "rx"; + st,sync = <&sai1a 2>; + clocks = <&rcc CK_KER_SAI1>; + clock-names = "sai_ck"; + status = "okay"; + + sai1b_port: port { + sai1b_endpoint: endpoint { + remote-endpoint = <&sgtl5000_rx_endpoint>; + dai-format = "i2s"; + mclk-fs = <512>; + }; + }; +}; + +/* MicroSD */ +&sdmmc1 { + pinctrl-names = "default", "opendrain", "sleep"; + pinctrl-0 = <&sdmmc1_b4_pins_a>; + pinctrl-1 = <&sdmmc1_b4_od_pins_a>; + pinctrl-2 = <&sdmmc1_b4_sleep_pins_a>; + broken-cd; + disable-wp; + st,neg-edge; + bus-width = <4>; + vmmc-supply = <&scmi_v3v3>; + vqmmc-supply = <&scmi_vddio1>; + no-1-8-v; + status = "okay"; +}; + +&spi1 { + pinctrl-names = "default", "sleep"; + pinctrl-0 = <&spi1_pins_a>; + pinctrl-1 = <&spi1_sleep_pins_a>; + #address-cells = <1>; + #size-cells = <0>; + cs-gpios = <&gpioh 8 GPIO_ACTIVE_LOW>, <&gpioh 3 GPIO_ACTIVE_HIGH>; + status = "okay"; + + display: display@0 { + compatible = "rocktech,rk050hr345-ct106a", "ilitek,ili9806e"; + reg = <0>; + vdd-supply = <®_3v3>; + spi-max-frequency = <10000000>; + reset-gpios = <&gpiob 6 GPIO_ACTIVE_LOW>; + backlight = <&backlight>; + + port { + panel_in: endpoint { + remote-endpoint = <<dc_out>; + }; + }; + }; +}; + +&timers2 { + status = "okay"; + + pwm2: pwm { + pinctrl-0 = <&pwm2_pins_a>; + pinctrl-1 = <&pwm2_sleep_pins_a>; + pinctrl-names = "default", "sleep"; + status = "okay"; + }; +}; + +&timers4 { + status = "okay"; + + pwm4: pwm { + pinctrl-names = "default", "sleep"; + pinctrl-0 = <&pwm4_pins_a>; + pinctrl-1 = <&pwm4_sleep_pins_a>; + status = "okay"; + }; +}; + +&usart1 { + pinctrl-names = "default", "idle", "sleep"; + pinctrl-0 = <&usart1_pins_b>; + pinctrl-1 = <&usart1_idle_pins_b>; + pinctrl-2 = <&usart1_sleep_pins_b>; + /delete-property/ dmas; + /delete-property/ dma-names; + status = "okay"; +}; + +&usart2 { + pinctrl-names = "default", "idle", "sleep"; + pinctrl-0 = <&usart2_pins_a>; + pinctrl-1 = <&usart2_idle_pins_a>; + pinctrl-2 = <&usart2_sleep_pins_a>; + /delete-property/ dmas; + /delete-property/ dma-names; + status = "okay"; +};