arm64: dts: apple: Fix style issues for t600x multi die .dtsi

The M1 Pro/Max/Ultra .dtsi files containing most MMIO nodes are a
collection of nodes without parent. The proper embedding inside a
"simple-bus" parent only happens in t6001.dtsi and t6002.dtsi.
Fix these dt style issue by using a define for their parent soc node and
bracket those MMIO nodes inside it.

Link: https://lore.kernel.org/asahi/e2365307-32d6-4ef9-9919-55ba69786741@kernel.org/
Suggested-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Janne Grunau <j@jannau.net>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Link: https://patch.msgid.link/20260903-apple-soc-multi-die-style-v1-1-eeb05ea0c187@jannau.net
Signed-off-by: Sven Peter <sven@kernel.org>

Author: jannau

arch/arm64/boot/dts/apple/t6001.dtsi

@@ -35,18 +35,17 @@
 
 #define DIE
 #define DIE_NO 0
+#define SOC_NODE {/soc}
 
-&{/soc} {
-	#include "t600x-die0.dtsi"
-	#include "t600x-dieX.dtsi"
-	#include "t600x-nvme.dtsi"
-};
-
+#include "t600x-die0.dtsi"
+#include "t600x-dieX.dtsi"
+#include "t600x-nvme.dtsi"
 #include "t600x-gpio-pins.dtsi"
 #include "t600x-pmgr.dtsi"
 
 #undef DIE
 #undef DIE_NO
+#undef SOC_NODE
 
 
 &aic {

arch/arm64/boot/dts/apple/t6002.dtsi

@@ -254,30 +254,28 @@
 
 #define DIE
 #define DIE_NO 0
+#define SOC_NODE die0
 
-&die0 {
-	#include "t600x-die0.dtsi"
-	#include "t600x-dieX.dtsi"
-};
-
+#include "t600x-die0.dtsi"
+#include "t600x-dieX.dtsi"
 #include "t600x-pmgr.dtsi"
 #include "t600x-gpio-pins.dtsi"
 
 #undef DIE
 #undef DIE_NO
+#undef SOC_NODE
 
 #define DIE _die1
 #define DIE_NO 1
+#define SOC_NODE die1
 
-&die1 {
-	#include "t600x-dieX.dtsi"
-	#include "t600x-nvme.dtsi"
-};
-
+#include "t600x-dieX.dtsi"
+#include "t600x-nvme.dtsi"
 #include "t600x-pmgr.dtsi"
 
 #undef DIE
 #undef DIE_NO
+#undef SOC_NODE
 
 &aic {
 	affinities {

arch/arm64/boot/dts/apple/t600x-die0.dtsi

@@ -6,7 +6,7 @@
  * Copyright The Asahi Linux Contributors
  */
 
-
+&SOC_NODE {
 	nco: clock-controller@28e03c000 {
 		compatible = "apple,t6000-nco", "apple,nco";
 		reg = <0x2 0x8e03c000 0x0 0x14000>;
@@ -537,3 +537,4 @@
 			status = "disabled";
 		};
 	};
+};

arch/arm64/boot/dts/apple/t600x-dieX.dtsi

@@ -6,6 +6,7 @@
  * Copyright The Asahi Linux Contributors
  */
 
+&SOC_NODE {
 	DIE_NODE(cpufreq_e): cpufreq@210e20000 {
 		compatible = "apple,t6000-cluster-cpufreq", "apple,t8103-cluster-cpufreq", "apple,cluster-cpufreq";
 		reg = <0x2 0x10e20000 0 0x1000>;
@@ -331,3 +332,4 @@
 		mode-switch;
 		power-domains = <&DIE_NODE(ps_atc3_usb)>;
 	};
+};

arch/arm64/boot/dts/apple/t600x-nvme.dtsi

@@ -5,6 +5,7 @@
  * Copyright The Asahi Linux Contributors
  */
 
+&SOC_NODE {
 	DIE_NODE(ans_mbox): mbox@38f408000 {
 		compatible = "apple,t6000-asc-mailbox", "apple,asc-mailbox-v4";
 		reg = <0x3 0x8f408000 0x0 0x4000>;
@@ -40,3 +41,4 @@
 		power-domain-names = "ans", "apcie0", "apcie1";
 		resets = <&DIE_NODE(ps_ans2)>;
 	};
+};