[PATCH 1/2] ARM: at91: dts: sama5d27-som1: adapt to upstream partition layout

[Ahmad Fatoum]

Linux v5.8-rc1 adds partitions to the flash at 0 node, which now overlap
with the partitions we define and resulting in errors:

  ERROR: m25p0.barebox: New partition m25p0.barebox conflicts
	with m25p0.at91bootstrap
  ERROR: m25p0.barebox-environment: New partition
  	m25p0.barebox-environment conflicts with m25p0.bootloader

We don't want to reuse those partitions as their name may and probably
will change (they have leading zeroes in the unit address).
We could use the &{/path/to/partition} syntax, but that might be broken
soon as well, as the nodes aren't inside a partitions node with a
"fixed-partitions" compatible.
The busses also don't align with the yaml schema and might be renamed.

Nuke the full flash at 0 node and supply ours and avoid these problems.
The offsets of the partitions have been adjusted to coincide with the
upstream offsets for second stage bootloader and environment.

Signed-off-by: Ahmad Fatoum <ahmad at a3f.at>
---
Hello Sascha,

The brekage doesn't seem to end..
if possible please reorder before v5.8-rc1 dts/ sync.
---
 arch/arm/dts/at91-sama5d27_som1_ek.dts | 28 +++++++++++++++++---------
 1 file changed, 19 insertions(+), 9 deletions(-)

diff --git a/arch/arm/dts/at91-sama5d27_som1_ek.dts b/arch/arm/dts/at91-sama5d27_som1_ek.dts
index befee89ad78a..97a326dd2b26 100644
--- a/arch/arm/dts/at91-sama5d27_som1_ek.dts
+++ b/arch/arm/dts/at91-sama5d27_som1_ek.dts
@@ -31,18 +31,28 @@
 };
 
 &qspi1 {
+	/delete-node/ flash at 0;
+
 	flash at 0 {
-		#address-cells = <1>;
-		#size-cells = <1>;
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <80000000>;
+		m25p,fast-read;
 
-		partition at 0 {
-			label = "barebox";
-			reg = <0x0 0x80000>;
-		};
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			barebox at 40000 {
+				label = "barebox";
+				reg = <0x40000 0xc0000>;
+			};
 
-		barebox_env: partition at 80000 {
-			label = "barebox-environment";
-			reg = <0x80000 0x80000>;
+			barebox_env: barebox-env at 100000 {
+				label = "barebox-environment";
+				reg = <0x100000 0x40000>;
+			};
 		};
 	};
 };
-- 
2.27.0