From 576621f1e353339fe81ece6cff7e8bcd12cbc7b8 Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Sun, 22 Nov 2015 19:06:07 +0000 Subject: linux: add support of Synopsys ARC770-based boards This patch introduces support of new boards with ARC cores. [1] Synopsys SDP board This is a new-generation development board from Synopsys that consists of base-board and CPU tile-board (which might have a real ASIC or FPGA with CPU image). It sports a lot of DesignWare peripherals like GMAC, USB, SPI, I2C etc and is intended to be used for early development of ARC-based products. [2] nSIM This is a virtual board implemented in Synopsys proprietary software simulator (even though available for free for open source community). This board has only serial port as a peripheral and so it is meant to be used for runtime testing which is especially useful during bring-up of new tools and platforms. What's also important ARC cores are very configurable so there're many variations of options like cache sizes, their line lengths, additional hardware blocks like multipliers, dividers etc. And this board could be used to make sure built software still runs on different HW configurations. Cc: Felix Fietkau Cc: Jo-Philipp Wich Cc: Jonas Gorski Signed-off-by: Alexey Brodkin SVN-Revision: 47589 --- ...openwrt-arc-remove-dependency-on-DEVTMPFS.patch | 36 ++++++++++++++++++++++ 1 file changed, 36 insertions(+) create mode 100644 target/linux/arc770/patches-4.3/0001-openwrt-arc-remove-dependency-on-DEVTMPFS.patch (limited to 'target/linux/arc770/patches-4.3/0001-openwrt-arc-remove-dependency-on-DEVTMPFS.patch') diff --git a/target/linux/arc770/patches-4.3/0001-openwrt-arc-remove-dependency-on-DEVTMPFS.patch b/target/linux/arc770/patches-4.3/0001-openwrt-arc-remove-dependency-on-DEVTMPFS.patch new file mode 100644 index 0000000000..53f80749bd --- /dev/null +++ b/target/linux/arc770/patches-4.3/0001-openwrt-arc-remove-dependency-on-DEVTMPFS.patch @@ -0,0 +1,36 @@ +From 271777096a31e76b2ffd750bc44efde9656de857 Mon Sep 17 00:00:00 2001 +From: Alexey Brodkin +Date: Thu, 13 Aug 2015 01:56:02 +0300 +Subject: [PATCH] openwrt: arc - remove dependency on DEVTMPFS + +OpenWRT builds initramfs so that it doesn't require DEVTMPFS so dropping +this dependency. That helps to escape 2 separate kernel rebuilds with +and without initramfs. + +2 builds happen because OpenWRT first builds kernel and later modules. +When building entire kernel with simple "make" INITRAMFS sets to a real +value and so was triggering DEVTMPFS selection. Then when building only +modules with "make modules" command INITRAMFS is zeroed and so kernel +config was changing that lead to full kernel rebuild. + +Signed-off-by: Alexey Brodkin +--- + arch/arc/Kconfig | 2 -- + 1 file changed, 2 deletions(-) + +diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig +index cf96ef2..f0c6d4c 100644 +--- a/arch/arc/Kconfig ++++ b/arch/arc/Kconfig +@@ -11,8 +11,6 @@ config ARC + select BUILDTIME_EXTABLE_SORT + select COMMON_CLK + select CLONE_BACKWARDS +- # ARC Busybox based initramfs absolutely relies on DEVTMPFS for /dev +- select DEVTMPFS if !INITRAMFS_SOURCE="" + select GENERIC_ATOMIC64 + select GENERIC_CLOCKEVENTS + select GENERIC_FIND_FIRST_BIT +-- +2.4.3 + -- cgit v1.2.3