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arm: dts: mt6589: Add device tree for Fairphone 1 

Add rudimentary support for the Fairphone 1, based on MT6589 to boot to
UART console.

The recently added SMP support needs to be disabled for this board as
the kernel panics executing /init with it, even though the CPUs seem to
start up fine - maybe a stability issue.

[    0.072010] smp: Bringing up secondary CPUs ...
[    0.131888] CPU1: thread -1, cpu 1, socket 0, mpidr 80000001
[    0.191889] CPU2: thread -1, cpu 2, socket 0, mpidr 80000002
[    0.251890] CPU3: thread -1, cpu 3, socket 0, mpidr 80000003
[    0.251982] smp: Brought up 1 node, 4 CPUs
[    0.254745] SMP: Total of 4 processors activated (7982.28 BogoMIPS).
[    0.255582] CPU: All CPU(s) started in SVC mode.

[    0.472039] Run /init as init process
[    0.473317] Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000004

Signed-off-by: Luca Weiss <luca@z3ntu.xyz>
Link: https://lore.kernel.org/r/20211024084535.30959-1-luca@z3ntu.xyz
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>
This commit is contained in:
Luca Weiss 2021-10-24 10:45:35 +02:00 committed by Matthias Brugger
parent fa55b7dcdc
commit aa67bacb48
3 changed files with 32 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
arch/arm/boot/dts/Makefile
View File

@ -1457,6 +1457,7 @@ dtb-$(CONFIG_ARCH_MEDIATEK) += \
mt2701-evb.dtb \
mt6580-evbp1.dtb \
mt6589-aquaris5.dtb \
mt6589-fairphone-fp1.dtb \
mt6592-evb.dtb \
mt7623a-rfb-emmc.dtb \
mt7623a-rfb-nand.dtb \

30
arch/arm/boot/dts/mt6589-fairphone-fp1.dts Normal file
View File

@ -0,0 +1,30 @@
// SPDX-License-Identifier: BSD-3-Clause
/*
* Copyright (c) 2021, Luca Weiss <luca@z3ntu.xyz>
*/
/dts-v1/;
#include "mt6589.dtsi"
/ {
model = "Fairphone 1";
compatible = "fairphone,fp1", "mediatek,mt6589";
chosen {
stdout-path = &uart3;
};
memory@80000000 {
device_type = "memory";
reg = <0x80000000 0x40000000>;
};
};
&cpus {
/* SMP is not stable on this board, makes the kernel panic */
/delete-property/ enable-method;
};
&uart3 {
status = "okay";
};

2
arch/arm/boot/dts/mt6589.dtsi
View File

@ -14,7 +14,7 @@
compatible = "mediatek,mt6589";
interrupt-parent = <&sysirq>;
cpus {
cpus: cpus {
#address-cells = <1>;
#size-cells = <0>;
enable-method = "mediatek,mt6589-smp";