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The H-A133L board is an industrial development board made by Liontron. It contains a number of dedicated JST connectors, to connect external peripherals. It features: - Allwinner A133 SoC (4 * Arm Cortex-A53 cores at up to 1.6 GHz) - 1 GiB, 2 GiB or 4 GiB of LPDDR4 DRAM - between 16 and 128 GiB eMMC flash - AXP707 PMIC (compatible to AXP803) - 100 Mbit/s RJ45 Ethernet socket, using an JLSemi JL1101 PHY - XR829 WIFI+Bluetooth chip - 2 * USB 2.0 USB-A ports, plus three sets of USB pins on connectors (connected via a USB hub connected to USB1 on the SoC) - microSD card slot - 3.5mm A/V port - 12V power supply - connectors for an LVDS or MIPI-DSI panel Add the devicetree describing the board's peripherals and their connections. Despite being a devboard, the manufacturer does not publish a schematic (I asked), so the PMIC rail assignments were bases on BSP dumps, educated guesses and some experimentation. Dropping the always-on property from any of the rails carrying it will make the board hang as soon as the kernel turns off unused regulators. Signed-off-by: Andre Przywara <andre.przywara@arm.com> Link: https://patch.msgid.link/20250505164729.18175-4-andre.przywara@arm.com [wens@csie.org: fix property in &usbphy; fix comment typo in &usb_otg] Signed-off-by: Chen-Yu Tsai <wens@csie.org> |
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| README | ||
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.