| Felix Brack | 85ab045 | 2018-01-23 18:27:22 +0100 | [diff] [blame] | 1 | # Copyright (C) 2018 EETS GmbH - http://www.eets.ch/ |
| 2 | # |
| 3 | # SPDX-License-Identifier: GPL-2.0+ |
| 4 | # |
| 5 | |
| 6 | Summary |
| 7 | ======= |
| 8 | |
| 9 | This document covers the PDU001 target. |
| 10 | |
| 11 | Hardware |
| 12 | ======== |
| 13 | |
| 14 | The PDU-001 (Processor and Display Unit) is a plugin card for 19" racks. It is |
| 15 | manufactured by EETS GmbH (https://www.eets.ch). The core of the board is a m2 |
| 16 | SOM from bytes at work (https://www.bytesatwork.ch) which in turn is based on |
| 17 | AM3352 SOC from TI (http://www.ti.com). |
| 18 | |
| 19 | Customization |
| 20 | ============= |
| 21 | |
| 22 | As usual the console serial interface is set by CONFIG_CONS_INDEX. Best choice |
| 23 | is 4 here since UART3 is wired to the connector K2. |
| 24 | The Run LED on the PDU-001 can be turned on red by setting CONFIG_RUN_LED_RED |
| 25 | or green by setting CONFIG_RUN_LED_GREEN. Setting CONFIG_RUN_LED_OFF will turn |
| 26 | off the Run LED. |
| 27 | |
| 28 | Booting |
| 29 | ======= |
| 30 | |
| 31 | The system boots from either eMMC or SD card cage. It will first try to boot |
| 32 | from the SD card cage. If this fails (missing or unbootable SD card) it will |
| 33 | try to boot from the internal eMMC. The root file system is always expected to |
| 34 | be located in the second partition of the device (eMMC or SD card) that pro- |
| 35 | vided the boot loader. |