[Buildroot] [PATCH v2] board: add support for ARC AXS101 and AXS103 Software Development Platforms

[Buildroot] [PATCH v2] board: add support for ARC AXS101 and AXS103 Software Development Platforms

[Alexey Brodkin]

The AXS10x Platform consists of a DesignWare AXC001 CPU
Card (with ARC 770D core) in case of AXS101 or AXC003 CPU Card
(typically with ARC HS38 core) in case of AXS103 mounted on an
ARC Software Development Platform Mainboard with DesignWare peripherals:
 * SD/MMC contoller
 * Gigabit network contoller
 * Serial ports (8250-compatible)
 * USB 2.0
 * SPI
 * I2C

It also houses HDMI output for external monitor connection.

For stand-alone usage of the board (with only keyboard, mouse and montor
attached) kernel console and getty made available on tty0 as well as on
serial port (ttyS3).

Note there're 2 prerequisites:
 [1] u-boot: 2015.07 - fix creation of .config
     http://patchwork.ozlabs.org/patch/502558/

 [2] binutils: fix buildng of Linux kernel for ARCv2 ISA
     http://patchwork.ozlabs.org/patch/503550/

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Gustavo Zacarias <gustavo@zacarias.com.ar>
---

Changes in v2:
 [1] Clean-up of /etc/inittab so it matches Buildroot's default
     with only changes
     a) addition of getty on tty0
     b) use default serial console instead of hard-coded ttyS0

 [2] Rework of defconfigs
     a) Beautify congifs with comments and spaces between sections
     b) Explicitly specify Linux kernel and headers versions so
        build results are reproducible.

 board/synopsys/axs10x/fs-overlay/etc/inittab | 38 ++++++++++++++++++++++++++++
 configs/snps_axs101_defconfig                | 28 ++++++++++++++++++++
 configs/snps_axs103_defconfig                | 29 +++++++++++++++++++++
 3 files changed, 95 insertions(+)
 create mode 100644 board/synopsys/axs10x/fs-overlay/etc/inittab
 create mode 100644 configs/snps_axs101_defconfig
 create mode 100644 configs/snps_axs103_defconfig

diff --git a/board/synopsys/axs10x/fs-overlay/etc/inittab b/board/synopsys/axs10x/fs-overlay/etc/inittab
new file mode 100644
index 0000000..43bacc6
--- /dev/null
+++ b/board/synopsys/axs10x/fs-overlay/etc/inittab
@@ -0,0 +1,38 @@
+# /etc/inittab
+#
+# Copyright (C) 2001 Erik Andersen <andersen@codepoet.org>
+#
+# Note: BusyBox init doesn't support runlevels.  The runlevels field is
+# completely ignored by BusyBox init. If you want runlevels, use
+# sysvinit.
+#
+# Format for each entry: <id>:<runlevels>:<action>:<process>
+#
+# id        == tty to run on, or empty for /dev/console
+# runlevels == ignored
+# action    == one of sysinit, respawn, askfirst, wait, and once
+# process   == program to run
+
+# Startup the system
+null::sysinit:/bin/mount -t proc proc /proc
+null::sysinit:/bin/mount -o remount,rw /
+null::sysinit:/bin/mkdir -p /dev/pts
+null::sysinit:/bin/mkdir -p /dev/shm
+null::sysinit:/bin/mount -a
+null::sysinit:/bin/hostname -F /etc/hostname
+# now run any rc scripts
+::sysinit:/etc/init.d/rcS
+
+# /sbin/getty invocation for tty0
+tty0::respawn:/sbin/getty 115200 tty0
+
+# Put a getty on the serial port
+console::respawn:/sbin/getty -L console 0 vt100
+
+# Stuff to do for the 3-finger salute
+::ctrlaltdel:/sbin/reboot
+
+# Stuff to do before rebooting
+::shutdown:/etc/init.d/rcK
+::shutdown:/sbin/swapoff -a
+::shutdown:/bin/umount -a -r
diff --git a/configs/snps_axs101_defconfig b/configs/snps_axs101_defconfig
new file mode 100644
index 0000000..9755756
--- /dev/null
+++ b/configs/snps_axs101_defconfig
@@ -0,0 +1,28 @@
+# Architecture
+BR2_arcle=y
+
+# System
+BR2_TARGET_GENERIC_HOSTNAME="axs101"
+BR2_TARGET_GENERIC_ISSUE="Welcome to the ARC Software Development Platform"
+BR2_TARGET_ROOTFS_INITRAMFS=y
+BR2_SYSTEM_DHCP="eth0"
+BR2_ROOTFS_OVERLAY="board/synopsys/axs10x/fs-overlay"
+
+# Headers
+BR2_KERNEL_HEADERS_VERSION=y
+BR2_DEFAULT_KERNEL_VERSION="4.1"
+BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_4_1=y
+
+# Kernel
+BR2_LINUX_KERNEL=y
+BR2_LINUX_KERNEL_CUSTOM_VERSION=y
+BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="4.2-rc5"
+BR2_LINUX_KERNEL_DEFCONFIG="axs101"
+
+# Bootloader
+BR2_TARGET_UBOOT=y
+BR2_TARGET_UBOOT_BUILD_SYSTEM_KCONFIG=y
+BR2_TARGET_UBOOT_CUSTOM_VERSION=y
+BR2_TARGET_UBOOT_CUSTOM_VERSION_VALUE="2015.07"
+BR2_TARGET_UBOOT_BOARD_DEFCONFIG="axs101"
+
diff --git a/configs/snps_axs103_defconfig b/configs/snps_axs103_defconfig
new file mode 100644
index 0000000..f68718e
--- /dev/null
+++ b/configs/snps_axs103_defconfig
@@ -0,0 +1,29 @@
+# Architecture
+BR2_arcle=y
+BR2_archs38=y
+
+# System
+BR2_TARGET_GENERIC_HOSTNAME="axs103"
+BR2_TARGET_GENERIC_ISSUE="Welcome to the ARC Software Development Platform"
+BR2_TARGET_ROOTFS_INITRAMFS=y
+BR2_SYSTEM_DHCP="eth0"
+BR2_ROOTFS_OVERLAY="board/synopsys/axs10x/fs-overlay"
+
+# Headers
+BR2_KERNEL_HEADERS_VERSION=y
+BR2_DEFAULT_KERNEL_VERSION="4.1"
+BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_4_1=y
+
+# Kernel
+BR2_LINUX_KERNEL=y
+BR2_LINUX_KERNEL_CUSTOM_VERSION=y
+BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="4.2-rc5"
+BR2_LINUX_KERNEL_DEFCONFIG="axs103_smp"
+
+# Bootloader
+BR2_TARGET_UBOOT=y
+BR2_TARGET_UBOOT_BUILD_SYSTEM_KCONFIG=y
+BR2_TARGET_UBOOT_CUSTOM_VERSION=y
+BR2_TARGET_UBOOT_CUSTOM_VERSION_VALUE="2015.07"
+BR2_TARGET_UBOOT_BOARD_DEFCONFIG="axs103"
+
-- 
2.4.3

[Buildroot] [PATCH v2] board: add support for ARC AXS101 and AXS103 Software Development Platforms

[Thomas Petazzoni]

Dear Alexey Brodkin,

On Tue,  4 Aug 2015 17:21:50 +0300, Alexey Brodkin wrote:
> The AXS10x Platform consists of a DesignWare AXC001 CPU
> Card (with ARC 770D core) in case of AXS101 or AXC003 CPU Card
> (typically with ARC HS38 core) in case of AXS103 mounted on an
> ARC Software Development Platform Mainboard with DesignWare peripherals:
>  * SD/MMC contoller
>  * Gigabit network contoller
>  * Serial ports (8250-compatible)
>  * USB 2.0
>  * SPI
>  * I2C
> 
> It also houses HDMI output for external monitor connection.
> 
> For stand-alone usage of the board (with only keyboard, mouse and montor
> attached) kernel console and getty made available on tty0 as well as on
> serial port (ttyS3).
> 
> Note there're 2 prerequisites:
>  [1] u-boot: 2015.07 - fix creation of .config
>      http://patchwork.ozlabs.org/patch/502558/
> 
>  [2] binutils: fix buildng of Linux kernel for ARCv2 ISA
>      http://patchwork.ozlabs.org/patch/503550/
> 
> Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
> Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
> Cc: Gustavo Zacarias <gustavo@zacarias.com.ar>
> ---

Applied, thanks. For defconfigs, we generally like to have a readme.txt
file in board/<something>/ that explains how to flash/use the generated
system on the HW. But that's of course only if special instructions are
needed.

Thanks!

Thomas
-- 
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com

[Buildroot] [PATCH v2] board: add support for ARC AXS101 and AXS103 Software Development Platforms

[Alexey Brodkin]

Hi Thomas,

On Tue, 2015-08-04 at 20:06 +0200, Thomas Petazzoni wrote:
> Dear Alexey Brodkin,
> 
> On Tue,  4 Aug 2015 17:21:50 +0300, Alexey Brodkin wrote:
> > The AXS10x Platform consists of a DesignWare AXC001 CPU
> > Card (with ARC 770D core) in case of AXS101 or AXC003 CPU Card
> > (typically with ARC HS38 core) in case of AXS103 mounted on an
> > ARC Software Development Platform Mainboard with DesignWare peripherals:
> >  * SD/MMC contoller
> >  * Gigabit network contoller
> >  * Serial ports (8250-compatible)
> >  * USB 2.0
> >  * SPI
> >  * I2C
> > 
> > It also houses HDMI output for external monitor connection.
> > 
> > For stand-alone usage of the board (with only keyboard, mouse and montor
> > attached) kernel console and getty made available on tty0 as well as on
> > serial port (ttyS3).
> > 
> > Note there're 2 prerequisites:
> >  [1] u-boot: 2015.07 - fix creation of .config
> >      http://patchwork.ozlabs.org/patch/502558/
> > 
> >  [2] binutils: fix buildng of Linux kernel for ARCv2 ISA
> >      http://patchwork.ozlabs.org/patch/503550/
> > 
> > Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
> > Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
> > Cc: Gustavo Zacarias <gustavo@zacarias.com.ar>
> > ---
> 
> Applied, thanks. For defconfigs, we generally like to have a readme.txt
> file in board/<something>/ that explains how to flash/use the generated
> system on the HW. But that's of course only if special instructions are
> needed.

Thanks for that.

I will send instructions shortly (probably in few days) because do have some
things to mention on how to use that board with generated files.

Also note I mentioned another prerequisite:
----------->8----------
u-boot: 2015.07 - fix creation of .config
http://patchwork.ozlabs.org/patch/502558/
----------->8----------
without which snps_axs103_defconfig will fail to build U-Boot.

I'm wondering if you saw my recent comments for that patch, probably we may
want to revisit it sometime soon.

-Alexey