# Re: \[PATCH V7 2/3\] powerpc/ge\_imp3a: Add ISA node to PCI primary bus

- From: Kumar Gala \<hidden\>
- Date: 2012-08-15 21:02:10 
- List: linuxppc-dev
- Page: https://ratatoskr.run/linuxppc-dev/2012/08/9470825
- Thread: https://ratatoskr.run/linuxppc-dev/2012/08/9470815/t.md

```text

On Aug 15, 2012, at 12:31 PM, Scott Wood wrote:

> On 08/15/2012 03:57 AM, Jia Hongtao wrote:
>> PCI primary bus will be determined by looking for ISA node in device =
tree.
>> Also for board ge_imp3a primary bus is the second PCI controller =
detected.
>> So we add ISA node to ge_imp3a's device tree to fit the new =
determination.
>>=20
>> Adding ISA node to other boards' device tree is not necessary. The =
situation
>> that the first bus is primary have already been handled. Please refer =
to the
>> following patch:
>> powerpc/pci: Make sure ISA IO base is not zero
>>=20
>> Signed-off-by: Jia Hongtao <redacted>
>> Signed-off-by: Li Yang <redacted>
>> ---
>> arch/powerpc/boot/dts/ge_imp3a.dts |    4 ++++
>> 1 files changed, 4 insertions(+), 0 deletions(-)
>>=20
>> diff --git a/arch/powerpc/boot/dts/ge_imp3a.dts =
b/arch/powerpc/boot/dts/ge_imp3a.dts
>> index fefae41..aa2c4b5 100644
>> --- a/arch/powerpc/boot/dts/ge_imp3a.dts
>> +++ b/arch/powerpc/boot/dts/ge_imp3a.dts
>> @@ -248,6 +248,10 @@
>> 				  0x1000000 0x0 0x0
>> 				  0x1000000 0x0 0x0
>> 				  0x0 0x10000>;
>> +
>> +			isa@1e {
>> +				device_type =3D "isa";
>> +			};
>> 		};
>> 	};
>> };
>=20
> I believe I already said it's not acceptable to break old device =
trees.
>=20
> -Scott
>=20

I agree w/Scott this is NOT an acceptable solution, both because of old =
device tree and its just wrong to list ISA if it doesn't exist in the =
device.

- k=
```