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boards: arm: Add Legend 2.5" boards

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This commit adds support for the Legend 2.5" boards (legend25_ssd and
legend25_hdd) based on the STM32F070CB MCU. These boards can be found in
the Seagate FireCuda Gaming Drive, Gaming Drive for Xbox, SSD Gaming
Drive for Xbox, and Gaming Drive for PlayStation devices. Both boards
contain the following hardware components:
- A B1414 LED strip connected to the PA7 pin (SPI MOSI)
- A SPI flash (FM25F005) connected on SPI2 bus

The Legend 2.5" HDD board also contains an activity LED connected on
TIM3 CH3

Signed-off-by: Maxime Bittan <maxime.bittan@seagate.com>
Signed-off-by: Simon Guinot <simon.guinot@seagate.com>
This commit is contained in:
Maxime Bittan 2020-10-22 18:43:41 +02:00 • committed by Christopher Friedt
commit 39614b8960
14 changed files with 532 additions and 0 deletions
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include/dt-bindings/led/seagate_legend_b1414.h Normal file
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/*
* Copyright (c) 2021, Seagate Technology LLC
*
* SPDX-License-Identifier: Apache-2.0
*/
#ifndef ZEPHYR_SAMPLES_DRIVERS_LED_B1414_H_
#define ZEPHYR_SAMPLES_DRIVERS_LED_B1414_H_
/*
* At 6 MHz: 1 bit in 166.666 ns
* 1200 ns -> 7.2 bits
* 300 ns -> 1.8 bits
* 900 ns -> 5.4 bits
*/
#define SPI_FREQ 6000000
#define ZERO_FRAME 0x60
#define ONE_FRAME 0x7C
#endif