1*85ab0452SFelix Brack# Copyright (C) 2018 EETS GmbH - http://www.eets.ch/ 2*85ab0452SFelix Brack# 3*85ab0452SFelix Brack# SPDX-License-Identifier: GPL-2.0+ 4*85ab0452SFelix Brack# 5*85ab0452SFelix Brack 6*85ab0452SFelix BrackSummary 7*85ab0452SFelix Brack======= 8*85ab0452SFelix Brack 9*85ab0452SFelix BrackThis document covers the PDU001 target. 10*85ab0452SFelix Brack 11*85ab0452SFelix BrackHardware 12*85ab0452SFelix Brack======== 13*85ab0452SFelix Brack 14*85ab0452SFelix BrackThe PDU-001 (Processor and Display Unit) is a plugin card for 19" racks. It is 15*85ab0452SFelix Brackmanufactured by EETS GmbH (https://www.eets.ch). The core of the board is a m2 16*85ab0452SFelix BrackSOM from bytes at work (https://www.bytesatwork.ch) which in turn is based on 17*85ab0452SFelix BrackAM3352 SOC from TI (http://www.ti.com). 18*85ab0452SFelix Brack 19*85ab0452SFelix BrackCustomization 20*85ab0452SFelix Brack============= 21*85ab0452SFelix Brack 22*85ab0452SFelix BrackAs usual the console serial interface is set by CONFIG_CONS_INDEX. Best choice 23*85ab0452SFelix Brackis 4 here since UART3 is wired to the connector K2. 24*85ab0452SFelix BrackThe Run LED on the PDU-001 can be turned on red by setting CONFIG_RUN_LED_RED 25*85ab0452SFelix Brackor green by setting CONFIG_RUN_LED_GREEN. Setting CONFIG_RUN_LED_OFF will turn 26*85ab0452SFelix Brackoff the Run LED. 27*85ab0452SFelix Brack 28*85ab0452SFelix BrackBooting 29*85ab0452SFelix Brack======= 30*85ab0452SFelix Brack 31*85ab0452SFelix BrackThe system boots from either eMMC or SD card cage. It will first try to boot 32*85ab0452SFelix Brackfrom the SD card cage. If this fails (missing or unbootable SD card) it will 33*85ab0452SFelix Bracktry to boot from the internal eMMC. The root file system is always expected to 34*85ab0452SFelix Brackbe located in the second partition of the device (eMMC or SD card) that pro- 35*85ab0452SFelix Brackvided the boot loader. 36