29.01.2019, 07:08, "Brenden Lai" <brenden_lai@jabil.com>:

Hi all ,

I have couple dts questions about porting OpenBMC into a new machine .

Although there are many dts file located in https://github.com/openbmc/linux/blob/dev-4.13/arch/arm/boot/dts/ ,

But , how does bitbake know which one should be applied .

You describe the needed device tree in the machine config file:

KERNEL_DEVICETREE = "${KMACHINE}-bmc-yandex-${MACHINE}.dtb"

if there are no suitable dts file in github , it should be made by myself , where should I put my dts file in working space source tree?

To do so you can create an append recipe to linux-aspeed, and copy the needed file to the kernel source tree:

========================================================================

$cat linux-aspeed_%.bbappend
FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"

SRC_URI += "file://aspeed-bmc-yandex-my70.dts"
SRC_URI += "file://my70.cfg"

do_patch_append() {
install -m 0644 ${WORKDIR}/aspeed-bmc-yandex-my70.dts ${STAGING_KERNEL_DIR}/arch/arm/boot/dts/aspeed-bmc-yandex-my70.dts
}

========================================================================

Brenden Lai
SR. BMC Design Engineer
E&I, Jabil Design Services

Konstantin Klubnichkin,

lead firmware engineer,

server hardware R&D group,

Yandex Moscow office.

tel: +7-903-510-33-33