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docs: drop "Device tree support" section

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We no longer provide any Linux kernel which do not have device-tree
support and all machines setup KERNEL_DEVICETREE correctly.

Signed-off-by: Mirza Krak <mirza.krak@endian.se>
This commit is contained in:
Mirza Krak
2017-05-23 15:18:17 +02:00
committed by Andrei Gherzan
parent 34113350f4
commit caabd6a608
1 changed files with 0 additions and 13 deletions
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docs/extra-build-config.md
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@@ -120,19 +120,6 @@ To build an initramfs image:
* Set the meta-rasberrypi variable (in raspberrypi.conf for example) * Set the meta-rasberrypi variable (in raspberrypi.conf for example)
- `KERNEL_INITRAMFS = "-initramfs"` - `KERNEL_INITRAMFS = "-initramfs"`
## 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 default enabled for kernel >= 3.18 and always
disabled for older kernel versions.
## Enable SPI bus ## Enable SPI bus
When using device tree kernels, set this variable to enable the SPI bus: When using device tree kernels, set this variable to enable the SPI bus: