2016-12-23 12:56:02

by Heinrich Schuchardt

Subject: [PATCH 1/1] ARM64: dts: meson-gxbb-odroidc2: linux,usable-memory

After reading the fdt u-boot overwrites the reg property of the
memory node with <0x0 0x0 0x0 0x78000000>.

To override this setting we have to use the property
linux,usable-memory.

If the first 16MB of the 2GB physical memory are used by
the Linux kernel oops occur on the Odroid C2.

For the Odroid C2 this patch replaces
[RFT PATCH] ARM64: dts: meson-gxbb: Add reserved memory zone and
usable memory range
https://lkml.org/lkml/2016/12/12/127

Fixes: 855960342d1e7 ARM64: dts: amlogic: add Hardkernel ODROID-C2
CC: Neil Armstrong <[email protected]>
CC: Kevin Hilman <[email protected]>
Signed-off-by: Heinrich Schuchardt <[email protected]>
---
arch/arm64/boot/dts/amlogic/meson-gxbb-odroidc2.dts | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/amlogic/meson-gxbb-odroidc2.dts b/arch/arm64/boot/dts/amlogic/meson-gxbb-odroidc2.dts
index 238fbeacd330..82ab94417940 100644
--- a/arch/arm64/boot/dts/amlogic/meson-gxbb-odroidc2.dts
+++ b/arch/arm64/boot/dts/amlogic/meson-gxbb-odroidc2.dts
@@ -61,7 +61,7 @@

memory@0 {
device_type = "memory";
- reg = <0x0 0x0 0x0 0x80000000>;
+ linux,usable-memory = <0x0 0x01000000 0x0 0x7f000000>;
};

usb_otg_pwr: regulator-usb-pwrs {
--
2.11.0

2016-12-23 19:48:47

by Neil Armstrong

Subject: Re: [PATCH 1/1] ARM64: dts: meson-gxbb-odroidc2: linux,usable-memory

Le 23/12/2016 13:52, Heinrich Schuchardt a ?crit :
> After reading the fdt u-boot overwrites the reg property of the
> memory node with <0x0 0x0 0x0 0x78000000>.
>
> To override this setting we have to use the property
> linux,usable-memory.
>
> If the first 16MB of the 2GB physical memory are used by
> the Linux kernel oops occur on the Odroid C2.
>
> For the Odroid C2 this patch replaces
> [RFT PATCH] ARM64: dts: meson-gxbb: Add reserved memory zone and
> usable memory range
> https://lkml.org/lkml/2016/12/12/127
>
> Fixes: 855960342d1e7 ARM64: dts: amlogic: add Hardkernel ODROID-C2
> CC: Neil Armstrong <[email protected]>
> CC: Kevin Hilman <[email protected]>
> Signed-off-by: Heinrich Schuchardt <[email protected]>
> ---
> arch/arm64/boot/dts/amlogic/meson-gxbb-odroidc2.dts | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/arm64/boot/dts/amlogic/meson-gxbb-odroidc2.dts b/arch/arm64/boot/dts/amlogic/meson-gxbb-odroidc2.dts
> index 238fbeacd330..82ab94417940 100644
> --- a/arch/arm64/boot/dts/amlogic/meson-gxbb-odroidc2.dts
> +++ b/arch/arm64/boot/dts/amlogic/meson-gxbb-odroidc2.dts
> @@ -61,7 +61,7 @@
>
> memory@0 {
> device_type = "memory";
> - reg = <0x0 0x0 0x0 0x80000000>;
> + linux,usable-memory = <0x0 0x01000000 0x0 0x7f000000>;
> };
>
> usb_otg_pwr: regulator-usb-pwrs {
>

Hi Heinrich,

Thanks a lot for testing and pushing this patch, indeed I missed this point abou u-boot overwriting reg.

I will test this next week, and hopefully get these merged.
Neil