Add imx8m support:
- add a cortexa53 subtarget to imx
- move ARCH and KERNELNAME to subtargets
- account for kernel modules that are not used for cortexa53
No device-specific targets or firmware images are created yet but all
imx8m* dtbs will be built.
enabling CONFIG_TARGET_ROOTFS_INITRAMFS results in
openwrt-imx-cortexa53-imx8m-initramfs-kernel.bin which has been
successfully booted on an imx8mm-evk using the following:
u-boot=> tftpboot $fdt_addr_r image-imx8mm-evk.dtb && \
tftpboot $kernel_addr_r openwrt-imx-cortexa53-imx8m-initramfs-kernel.bin && \
booti $kernel_addr_r - $fdt_addr_r
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
In imx target we're sharing single, version agnostic kernel
`config-default` file, which doesn't work very well with current 5.10
and upcoming 5.15 kernel symbols as recent rebase onto 5.15 kernel
introduced in commit 2b395c2982 ("imx: update config for 5.15) has
introduced following regression with 5.10 kernel:
Marvell 88E6xxx Ethernet switch fabric support (NET_DSA_MV88E6XXX) [Y/n/m/?] y
Switch Global 2 Registers support (NET_DSA_MV88E6XXX_GLOBAL2) [Y/n/?] (NEW)
That NET_DSA_MV88E6XXX_GLOBAL2 kernel config symbol has been removed in
upstream commit 63368a7416df ("net: dsa: mv88e6xxx: Make global2 support
mandatory") in kernel version 5.12.
This issue could be probably fixed by introduction of separate kernel
config files for each currently used kernel versions and subtarget, but
it is not worth the hassle and resources as imx target is running mostly
upstream kernel, so lets fix it by switching to 5.15 version instead.
Fixes: 2b395c2982 ("imx: update config for 5.15")
Acked-by: Piotr Dymacz <pepe2k@gmail.com>
Signed-off-by: Petr Štetiar <ynezz@true.cz>
This adds some essential files required by new 'cortexa7' subtarget,
dedicated for Cortex-A7 based NXP i.MX series. For now, the kernel
config-default focuses only on the i.MX 6UL family, as the following
changeset will introduce support for i.MX 6ULL based device. Support
for more platforms (e.g. i.MX 7) might be enabled later, while adding
more devices.
Signed-off-by: Piotr Dymacz <pepe2k@gmail.com>
Modern NXP i.MX series includes several different families, based on
single- or multi-core Arm Cortex-A CPUs. To be able to support more
families within a single target, we split the 'imx' in arch-specific
subtargets, starting with 'cortexa9' for the Cortex-A9 based i.MX 6,
already supported by the original 'imx6' target.
Signed-off-by: Piotr Dymacz <pepe2k@gmail.com>
This is first step in migrating to a generic i.MX target which in the
next steps will also get divided into arch-specific subtargets.
In the result, this will make it possible to support, within a single
target, also other modern NXP i.MX families, like the i.MX 7, i.MX 8
or recently introduced i.MX 9.
Signed-off-by: Piotr Dymacz <pepe2k@gmail.com>
