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| Started by | Duc Dang <dhdang@apm.com> |
|---|---|
| First post | 2016-06-21 11:30 +0200 |
| Last post | 2016-06-21 23:50 +0200 |
| Articles | 3 — 2 participants |
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Warning when compiling DTB on X-Gene platform with dtc 1.4.1-g53bf130b Duc Dang <dhdang@apm.com> - 2016-06-21 11:30 +0200
Re: Warning when compiling DTB on X-Gene platform with dtc 1.4.1-g53bf130b Andrew Lunn <andrew@lunn.ch> - 2016-06-21 15:30 +0200
Re: Warning when compiling DTB on X-Gene platform with dtc 1.4.1-g53bf130b Duc Dang <dhdang@apm.com> - 2016-06-21 23:50 +0200
| From | Duc Dang <dhdang@apm.com> |
|---|---|
| Date | 2016-06-21 11:30 +0200 |
| Subject | Warning when compiling DTB on X-Gene platform with dtc 1.4.1-g53bf130b |
| Message-ID | <rMqam-3Th-17@gated-at.bofh.it> |
Hi Rob, I got warning on unit_address_vs_reg similar to this https://lkml.org/lkml/2016/3/7/43 when using v4.7-rc2 dtc to build dtb for X-Gene Mustang: dhdang@xgene-next=>./scripts/dtc/dtc -O dtb -R 16 -o mustang.dtb arch/arm64/boot/dts/apm/apm-mustang.dts Warning (unit_address_vs_reg): Node /soc/reboot@17000014 has a unit name, but no reg property Warning (unit_address_vs_reg): Node /memory has a reg or ranges property, but no unit name Warning (unit_address_vs_reg): Node /gpio-keys/button@1 has a unit name, but no reg property There are nodes that I cannot change the node-name due to backward compatible with old firmware reason (/soc/reboot@17000014 as an example). Is there any other way to avoid the warning? Regards, Duc Dang.
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| From | Andrew Lunn <andrew@lunn.ch> |
|---|---|
| Date | 2016-06-21 15:30 +0200 |
| Subject | Re: Warning when compiling DTB on X-Gene platform with dtc 1.4.1-g53bf130b |
| Message-ID | <rMtUB-6nL-1@gated-at.bofh.it> |
| In reply to | #1427502 |
On Tue, Jun 21, 2016 at 02:02:44AM -0700, Duc Dang wrote: > Hi Rob, > > I got warning on unit_address_vs_reg similar to this > https://lkml.org/lkml/2016/3/7/43 when using v4.7-rc2 dtc to build dtb > for X-Gene Mustang: > > dhdang@xgene-next=>./scripts/dtc/dtc -O dtb -R 16 -o mustang.dtb > arch/arm64/boot/dts/apm/apm-mustang.dts > Warning (unit_address_vs_reg): Node /soc/reboot@17000014 has a unit > name, but no reg property > Warning (unit_address_vs_reg): Node /memory has a reg or ranges > property, but no unit name > Warning (unit_address_vs_reg): Node /gpio-keys/button@1 has a unit > name, but no reg property > > There are nodes that I cannot change the node-name due to backward > compatible with old firmware reason (/soc/reboot@17000014 as an > example). Is there any other way to avoid the warning? I think you have that backwards around. The Kernel needs to be backwards compatible with old DT blobs. DT blobs don't generally need to be backwards compatible to older kernels. However, the kernel should however be happy with or without the unit name. The unit name is pointless in this case. Andrew
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| From | Duc Dang <dhdang@apm.com> |
|---|---|
| Date | 2016-06-21 23:50 +0200 |
| Message-ID | <rMBIu-2Rm-21@gated-at.bofh.it> |
| In reply to | #1427738 |
On Tue, Jun 21, 2016 at 6:25 AM, Andrew Lunn <andrew@lunn.ch> wrote: > On Tue, Jun 21, 2016 at 02:02:44AM -0700, Duc Dang wrote: >> Hi Rob, >> >> I got warning on unit_address_vs_reg similar to this >> https://lkml.org/lkml/2016/3/7/43 when using v4.7-rc2 dtc to build dtb >> for X-Gene Mustang: >> >> dhdang@xgene-next=>./scripts/dtc/dtc -O dtb -R 16 -o mustang.dtb >> arch/arm64/boot/dts/apm/apm-mustang.dts >> Warning (unit_address_vs_reg): Node /soc/reboot@17000014 has a unit >> name, but no reg property >> Warning (unit_address_vs_reg): Node /memory has a reg or ranges >> property, but no unit name >> Warning (unit_address_vs_reg): Node /gpio-keys/button@1 has a unit >> name, but no reg property >> >> There are nodes that I cannot change the node-name due to backward >> compatible with old firmware reason (/soc/reboot@17000014 as an >> example). Is there any other way to avoid the warning? > > I think you have that backwards around. The Kernel needs to be > backwards compatible with old DT blobs. DT blobs don't generally need > to be backwards compatible to older kernels. > > However, the kernel should however be happy with or without the unit > name. The unit name is pointless in this case. I should be more specific: The old firmware I am talking about is the bootloader (U-Boot). U-Boot relies on the full node names to do device tree fix-up, so changing the node names will break the fix-up operation in already-released U-Boot. > > Andrew Regards, Duc Dang.
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