From 4905c7cc2b72110e5254bb0172ffccfc0f582a40 Mon Sep 17 00:00:00 2001 From: Petter Mabäcker Date: Fri, 6 Feb 2015 23:16:19 +0100 Subject: README: add info about device tree support MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Add basic info about device tree support for RPi and how to use KERNEL_DEVICETREE. Also fix minor typo in the section about redmine. Change-Id: Ibfee31e319c421c09d6e9cbfbe83364e8d055b95 Signed-off-by: Petter Mabäcker --- README | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) diff --git a/README b/README index fac9826..bb2f4be 100644 --- a/README +++ b/README @@ -24,6 +24,7 @@ Contents: 2.H. Images 2.I. Boot to U-Boot 2.J. Image with Initramfs + 2.K. Device tree support 3. Extra apps 3.A. omxplayer 4. Source code and mirrors @@ -171,6 +172,18 @@ To build an initramfs image : * Set the meta-rasberrypi variable (in raspberrypi.conf for example) - KERNEL_INITRAMFS = "-initramfs" +2.K. Device tree support +========================= +Device tree for RPi is only supported when using linux-raspberrypi 3.18+ +kernels. + + * Set KERNEL_DEVICETREE (in conf/machine/raspberrypi.conf) + - the trailer is added to the kernel image before kernel install task. + While creating the SDCard image, this modified kernel is put on + boot partition (as kernel.img) as well as DeviceTree blobs (.dtb files). + +NOTE: KERNEL_DEVICETREE is empty by default. + 3. Extra apps ============= @@ -247,7 +260,7 @@ In order to manage and trace the meta-raspberrypi issues, we use redmine: Here we report, trace and develop bugs, features or support tickets for this yocto BSP later. -If you push patches which have a remine issue associated, please provide the +If you push patches which have a redmine issue associated, please provide the issue number in the commit log just before "Signed-off-by" line(s). Example line for a bug: [Bug #13] -- cgit v1.2.3-54-g00ecf