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[2a00:1028:8388:a84e:318a:f58b:5e43:a2b9]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-48dfd500e75sm16386408f8f.42.2026.10.18.05.45.00 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Sun, 18 Oct 2026 05:45:00 -0700 (PDT) From: Josef Schlehofer To: Krzysztof Kozlowski , Alim Akhtar , Peter Griffin , Rob Herring , Conor Dooley Cc: linux-samsung-soc@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH 0/2] ARM: dts: samsung: Add support for Hardkernel ODROID-U2 Date: Sun, 18 Oct 2026 14:44:57 +0200 Message-ID: <20261018124459.3026-1-pepe.schlehofer@gmail.com> X-Mailer: git-send-email 2.54.0 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit This series introduces device tree support for Hardkernel's ODROID-U2 single board computer, based on the Samsung Exynos4412 Prime SoC. ODROID-U2 is the predecessor of ODROID-U3 and shares most of its hardware design (2 GB LPDDR2 RAM, LAN9730 10/100 Ethernet on HSIC0, USB3503A hub on HSIC1, MAX98090 audio codec with headphone jack and on-board MEMS DMIC, MAX77686 PMIC, PWM-controlled cooling fan header, blue heartbeat LED). Key differences from ODROID-U3: - The micro-USB (DWC2 / hsotg) port does not have a VBUS supply switch, so it operates only in peripheral mode (dr_mode = "peripheral"). - The 3.5 mm jack is headphone only, and the board features an on-board MEMS digital microphone (DMIC) rather than an analog mic input. - There is no expansion header with SPI. Hardware verification was performed on a physical ODROID-U2 board running Linux 6.12: - DWC2 USB: verified in peripheral mode via /sys/class/udc and dmesg. - Ethernet: SMSC LAN9730 detected on HSIC0, link up at 100 Mbps Full-Duplex. - Storage: microSD (mmcblk2) detected and functional. eMMC was not tested, as no eMMC module was available. - Thermal: /sys/class/thermal/cooling_device0/type shows pwm-fan (no fan was attached). - Audio: * Stereo headphone playback verified with speaker-test and aplay. * On-board digital MEMS microphone (DMIC) recording verified with: amixer -c OdroidU2 cset name='DMIC Mux' DMIC arecord -D hw:OdroidU2,0 -f S16_LE -r 48000 -c 2 -d 5 /tmp/dmic.wav aplay -D hw:OdroidU2,0 /tmp/dmic.wav Audio routing includes "Mixer DAI RX", "HiFi Capture" connecting the MAX98090 codec capture to the Exynos I2S controller. - LED: blue:heartbeat blinking with heartbeat trigger. Josef Schlehofer (2): dt-bindings: arm: samsung: Add Hardkernel ODROID-U2 ARM: dts: samsung: Add Hardkernel ODROID-U2 .../bindings/arm/samsung/samsung-boards.yaml | 1 + arch/arm/boot/dts/samsung/Makefile | 1 + .../dts/samsung/exynos4412-odroid-common.dtsi | 6 +- .../boot/dts/samsung/exynos4412-odroidu2.dts | 139 ++++++++++++++++++ 4 files changed, 144 insertions(+), 3 deletions(-) create mode 100644 arch/arm/boot/dts/samsung/exynos4412-odroidu2.dts base-commit: 58161ead29e50d70a317ea26b472e0c7508e69da -- 2.54.0 (Apple Git-157)