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configs/lego_ev3: bump kernel to 4.4 series

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Bump kernel revision used by lego_ev3_defconfig to the latest tag from
ev3dev, as suggested by Peter. This is a 4.4 series kernel, which has the
added benefit of not necessitating a specific gcc to boot.

We need a patch to create an empty drivers/lego/Kconfig file for the build
to succeed though, as the ev3dev kernel normally expects a drivers tree to
be checked out there.

Signed-off-by: Vincent Stehlé <vincent.stehle@laposte.net>
Suggested-by: Peter Korsgaard <peter@korsgaard.com>
Reviewed-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
This commit is contained in:
Vincent Stehlé 2016-10-15 18:51:55 +02:00 committed by Thomas Petazzoni
parent ac0d953460
commit 46a373e2f5
3 changed files with 34 additions and 14 deletions
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24
board/lego/ev3/patches/linux/0001-Create-empty-drivers-lego-Kconfig.patch Normal file
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@ -0,0 +1,24 @@
From 72c5727488f10160abfadcc77dd9763c4408b5e9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Vincent=20Stehl=C3=A9?= <vincent.stehle@laposte.net>
Date: Sat, 15 Oct 2016 16:23:31 +0200
Subject: [PATCH] Create empty drivers/lego/Kconfig
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Signed-off-by: Vincent Stehlé <vincent.stehle@laposte.net>
---
drivers/lego/Kconfig | 1 +
1 file changed, 1 insertion(+)
create mode 100644 drivers/lego/Kconfig
diff --git a/drivers/lego/Kconfig b/drivers/lego/Kconfig
new file mode 100644
index 0000000..d7cbf4f
--- /dev/null
+++ b/drivers/lego/Kconfig
@@ -0,0 +1 @@
+# Empty Kconfig just to make source from drivers/Kconfig succeed.
--
2.9.3

10
board/lego/ev3/readme.txt
View File

@ -16,11 +16,8 @@ See:
The buildroot configuration uses the Linux kernel of the ev3dev project.
See:
- http://botbench.com/blog/2013/07/31/lego-mindstorms-ev3-source-code-available/
- https://github.com/mindboards/ev3sources
Note that the EV3 configuration uses gcc 4.7, as the boot is broken with gcc
4.8.
- https://github.com/ev3dev/ev3-kernel/
- http://www.ev3dev.org/
How it works
============
@ -61,13 +58,12 @@ After building, you should obtain this tree:
├── rootfs.ext3 -> rootfs.ext2
└── uImage
Prepare your SDcard
===================
The following µSD card layout is recommended:
- First partition formated with a FAT filesystem, containing the uImage.
- First partition formatted with a FAT filesystem, containing the uImage.
- Second partition formatted as ext2 or ext3, containing the root filesystem.
Create the SDcard partition table

14
configs/lego_ev3_defconfig
View File

@ -2,23 +2,23 @@
BR2_arm=y
BR2_arm926t=y
# toolchain
# Use gcc 4.7, as gcc 4.8 breaks the boot.
BR2_GCC_VERSION_4_7_X=y
# patches
BR2_GLOBAL_PATCH_DIR="board/lego/ev3/patches"
# system
BR2_TARGET_GENERIC_GETTY=y
BR2_TARGET_GENERIC_GETTY_PORT="ttyS1"
# Linux headers same as kernel, a 3.3 series
BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_3_3=y
# Linux headers same as kernel, a 4.4 series
BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_4_4=y
# Kernel
BR2_LINUX_KERNEL=y
BR2_LINUX_KERNEL_CUSTOM_GIT=y
BR2_LINUX_KERNEL_CUSTOM_REPO_URL="https://github.com/mindboards/ev3dev-kernel.git"
BR2_LINUX_KERNEL_CUSTOM_REPO_VERSION="v3.3.0-2-ev3dev_0"
BR2_LINUX_KERNEL_CUSTOM_REPO_URL="https://github.com/ev3dev/ev3dev-kernel.git"
BR2_LINUX_KERNEL_CUSTOM_REPO_VERSION="v4.4.19-15-ev3dev-ev3_1"
BR2_LINUX_KERNEL_DEFCONFIG="ev3dev"
BR2_LINUX_KERNEL_UIMAGE=y
# filesystem
BR2_TARGET_ROOTFS_EXT2=y