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SubjectRe: [PATCH v2 03/12] arm: dts: mt7623: fix invalid memory node being generated
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On Fri, 2018-05-11 at 17:03 +0200, Matthias Brugger wrote:
>
> On 04/11/2018 10:53 AM, sean.wang@mediatek.com wrote:
> > From: Sean Wang <sean.wang@mediatek.com>
> >
> > Below two wrong nodes in existing DTS files would cause a fail boot since
> > in fact the address 0 is not the correct place the memory device locates
> > at.
> >
> > memory {
> > device_type = "memory";
> > reg = <0x0 0x0 0x0 0x0>;
> > };
> >
> > memory@80000000 {
> > reg = <0x0 0x80000000 0x0 0x40000000>;
> > };
> >
> > In order to avoid having a memory node starting at address 0, we can't
> > include file skeleton64.dtsi and instead need to explicitly manually
> > define a few of properties the DTS relies on such as #address-cells
> > and #size-cells in root node and device_type in the node memory@80000000.
> >
> > Cc: stable@vger.kernel.org
> > Fixes: 31ac0d69a1d4 ("ARM: dts: mediatek: add MT7623 basic support")
> > Signed-off-by: Sean Wang <sean.wang@mediatek.com>
> > Cc: Rob Herring <robh+dt@kernel.org>
> > ---
> > arch/arm/boot/dts/mt7623.dtsi | 3 ++-
> > arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts | 1 +
> > arch/arm/boot/dts/mt7623n-rfb.dtsi | 1 +
> > 3 files changed, 4 insertions(+), 1 deletion(-)
> >
>
> merged. We would need this at least for mt2701 as well, correct?
> Would you mind to provide a patch.
>
> Regards,
> Matthias
>

Thanks! I totally think the same problem could happen on mt2701, so I'm
happy to come up with a patch for that.

Sean

> > diff --git a/arch/arm/boot/dts/mt7623.dtsi b/arch/arm/boot/dts/mt7623.dtsi
> > index fec4715..406a9f3 100644
> > --- a/arch/arm/boot/dts/mt7623.dtsi
> > +++ b/arch/arm/boot/dts/mt7623.dtsi
> > @@ -15,11 +15,12 @@
> > #include <dt-bindings/phy/phy.h>
> > #include <dt-bindings/reset/mt2701-resets.h>
> > #include <dt-bindings/thermal/thermal.h>
> > -#include "skeleton64.dtsi"
> >
> > / {
> > compatible = "mediatek,mt7623";
> > interrupt-parent = <&sysirq>;
> > + #address-cells = <2>;
> > + #size-cells = <2>;
> >
> > cpu_opp_table: opp-table {
> > compatible = "operating-points-v2";
> > diff --git a/arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts b/arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts
> > index bbf56f8..5938e4c 100644
> > --- a/arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts
> > +++ b/arch/arm/boot/dts/mt7623n-bananapi-bpi-r2.dts
> > @@ -109,6 +109,7 @@
> > };
> >
> > memory@80000000 {
> > + device_type = "memory";
> > reg = <0 0x80000000 0 0x40000000>;
> > };
> > };
> > diff --git a/arch/arm/boot/dts/mt7623n-rfb.dtsi b/arch/arm/boot/dts/mt7623n-rfb.dtsi
> > index a199ae7..343e8ef 100644
> > --- a/arch/arm/boot/dts/mt7623n-rfb.dtsi
> > +++ b/arch/arm/boot/dts/mt7623n-rfb.dtsi
> > @@ -40,6 +40,7 @@
> > };
> >
> > memory@80000000 {
> > + device_type = "memory";
> > reg = <0 0x80000000 0 0x40000000>;
> > };
> >
> >


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