Hi Petr,

> -----Original Message-----
> From: openwrt-devel [mailto:openwrt-devel-boun...@lists.openwrt.org]
> On Behalf Of Petr Štetiar
> Sent: Montag, 20. Januar 2020 20:40
> To: openwrt-devel@lists.openwrt.org
> Cc: Petr Štetiar <yn...@true.cz>
> Subject: [OpenWrt-Devel] [PATCH 19.07] ramips: mt7621: ubnt-erx: allow
> sysupgrade from master
> 
> Currently it's not possible to downgrade from master:
> 
>  Device ubiquiti,edgerouterx not supported by this image  Supported
> devices: ubnt-erx
> 
> So fix it by adding a DTS based device name from master into
> SUPPORTED_DEVICES list.

Note that I changed somewhat between 100 and 150 devices when reorganizing 
board names in ramips between master and 19.07.

So, unless you have a specific reason to deal with this particular device, 
there are more to come. ;-)

I thus personally would not start to actively support "downgrading". On the 
other side, there is no downside to adding downgrade support for this 
particular device, so feel free to go ...

Best

Adrian

> 
> Signed-off-by: Petr Štetiar <yn...@true.cz>
> ---
>  target/linux/ramips/image/mt7621.mk | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/target/linux/ramips/image/mt7621.mk
> b/target/linux/ramips/image/mt7621.mk
> index 53a264f527a6..a8999974731a 100644
> --- a/target/linux/ramips/image/mt7621.mk
> +++ b/target/linux/ramips/image/mt7621.mk
> @@ -483,6 +483,7 @@ define Device/ubnt-erx
>    KERNEL_INITRAMFS := $$(KERNEL) | ubnt-erx-factory-image
> $(KDIR)/tmp/$$(KERNEL_INITRAMFS_PREFIX)-factory.tar
>    IMAGE/sysupgrade.bin := sysupgrade-tar | append-metadata
>    DEVICE_TITLE := Ubiquiti EdgeRouter X
> +  SUPPORTED_DEVICES += ubiquiti_edgerouterx
>  endef
>  TARGET_DEVICES += ubnt-erx
> 
> @@ -491,6 +492,7 @@ define Device/ubnt-erx-sfp
>    DTS := UBNT-ERX-SFP
>    DEVICE_TITLE := Ubiquiti EdgeRouter X-SFP
>    DEVICE_PACKAGES += kmod-i2c-algo-pca kmod-gpio-pca953x kmod-i2c-
> gpio-custom
> +  SUPPORTED_DEVICES += ubiquiti_edgerouterx-sfp
>  endef
>  TARGET_DEVICES += ubnt-erx-sfp
> 
> 
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