From 584d7c53bd2d286a71fe5e8244624f59c529cb26 Mon Sep 17 00:00:00 2001
From: Tomasz Maciej Nowak <tomek_n@o2.pl>
Date: Wed, 7 Mar 2018 22:10:02 +0100
Subject: mvebu: new subtarget cortex A53
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This commit introduces new subtarget for Marvell EBU Armada Cortex A53
processor based devices.

The first device is Globalscale ESPRESSObin. Some hardware specs:

SoC: Marvell Armada 3700LP (88F3720) dual core ARM Cortex A53
     processor up to 1.2GHz
RAM: 512MB, 1GB or 2GB DDR3
Storage: SATA interface
         µSD card slot with footprint for an optional 4GB EMMC
         4MB SPI NOR flash for bootloader
Ethernet: Topaz Networking Switch (88E6341) with 3x GbE ports
Connectors: USB 3.0
            USB 2.0
            µUSB port connected to PL2303SA (USB to serial bridge
            controller) for UART access
Expansion: 2x 46-pin GPIO headers for accessories and shields with
           I2C, GPIOs, PWM, UART, SPI, MMC, etc
           MiniPCIe slot
Misc: Reset button, JTAG interface

Currently booting only from µSD card is supported.
The boards depending on date of dispatch can come with various U-Boot
versions. For the newest version 2017.03-armada-17.10 no manual
intervention should be needed to boot OpenWrt image. For the older ones
it's necessary to modify default U-Boot environment:

 1. Interrupt boot process to run U-Boot command line,

 2. Run following commands:
    (for version 2017.03-armada-17.06 and 2017.03-armada-17.08)
     setenv bootcmd "load mmc 0:1 0x4d00000 boot.scr; source 0x4d00000"
     saveenv

    (for version 2015.01-armada-17.02 and 2015.01-armada-17.04)
     setenv bootargs "console=ttyMV0,115200 root=/dev/mmcblk0p2 rw rootwait"
     setenv bootcmd "ext4load mmc 0:1 ${fdt_addr} armada-3720-espressobin.dtb; ext4load mmc 0:1 ${kernel_addr} Image; booti ${kernel_addr} - ${fdt_addr}"
     saveenv

 3. Poweroff, insert SD card with OpenWrt image, boot and enjoy.

Signed-off-by: Tomasz Maciej Nowak <tomek_n@o2.pl>
---
 target/linux/mvebu/config-4.14 | 1 +
 1 file changed, 1 insertion(+)

(limited to 'target/linux/mvebu/config-4.14')

diff --git a/target/linux/mvebu/config-4.14 b/target/linux/mvebu/config-4.14
index 738f0378b4..5286bf9b83 100644
--- a/target/linux/mvebu/config-4.14
+++ b/target/linux/mvebu/config-4.14
@@ -39,6 +39,7 @@ CONFIG_ARMADA_38X_CLK=y
 CONFIG_ARMADA_THERMAL=y
 CONFIG_ARMADA_XP_CLK=y
 CONFIG_ARM_APPENDED_DTB=y
+# CONFIG_ARM_ARMADA_37XX_CPUFREQ is not set
 CONFIG_ARM_ATAG_DTB_COMPAT=y
 # CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND is not set
 CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER=y
-- 
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