[PATCH 7/7] arm64: dts: apple: t8122: Add NVMe device nodes
From: Janne Grunau
Date: Fri Sep 25 2026 - 05:48:10 EST
From: Michael Reeves <michael.reeves077@xxxxxxxxx>
On Apple Silicon, NVMe communication is mediated by a
coprocessor known as the ANS, and protected by its own
IOMMU known as the SART.
Add the following nodes to the M3 (t8122) device tree:
- Mailbox for the ANS coprocessor
- SART (IOMMU for the ANS coprocessor)
- The NVMe / ANS coprocessor itself
Signed-off-by: Michael Reeves <michael.reeves077@xxxxxxxxx>
Signed-off-by: Janne Grunau <j@xxxxxxxxxx>
---
arch/arm64/boot/dts/apple/t8122.dtsi | 40 ++++++++++++++++++++++++++++++++++++
1 file changed, 40 insertions(+)
diff --git a/arch/arm64/boot/dts/apple/t8122.dtsi b/arch/arm64/boot/dts/apple/t8122.dtsi
index 52257fa22631..959ddf36efa1 100644
--- a/arch/arm64/boot/dts/apple/t8122.dtsi
+++ b/arch/arm64/boot/dts/apple/t8122.dtsi
@@ -454,6 +454,46 @@ pinctrl_aop: pinctrl@2f4824000 {
apple,npins = <54>;
};
+
+ ans_mbox: mbox@309408000 {
+ compatible = "apple,t8122-asc-mailbox",
+ "apple,asc-mailbox-v4";
+ reg = <0x3 0x09408000 0x0 0x4000>;
+
+ interrupt-parent = <&aic>;
+ interrupts = <AIC_IRQ 730 IRQ_TYPE_LEVEL_HIGH>,
+ <AIC_IRQ 731 IRQ_TYPE_LEVEL_HIGH>,
+ <AIC_IRQ 732 IRQ_TYPE_LEVEL_HIGH>,
+ <AIC_IRQ 733 IRQ_TYPE_LEVEL_HIGH>;
+ interrupt-names = "send-empty", "send-not-empty",
+ "recv-empty", "recv-not-empty";
+
+ #mbox-cells = <0>;
+ power-domains = <&ps_ans>;
+ };
+
+ sart: sart@30dc50000 {
+ compatible = "apple,t8122-sart", "apple,t6000-sart";
+ reg = <0x3 0x0dc50000 0x0 0x10000>;
+ power-domains = <&ps_ans>;
+ };
+
+ nvme: nvme@30dcc0000 {
+ compatible = "apple,t8122-nvme-ans2",
+ "apple,t8103-nvme-ans2";
+ reg = <0x3 0x0dcc0000 0x0 0x60000>,
+ <0x3 0x09400000 0x0 0x4000>;
+ reg-names = "nvme", "ans";
+
+ interrupt-parent = <&aic>;
+ interrupts = <AIC_IRQ 742 IRQ_TYPE_LEVEL_HIGH>;
+ mboxes = <&ans_mbox>;
+ power-domains = <&ps_ans>, <&ps_apcie_st>;
+ power-domain-names = "ans", "apcie0";
+ resets = <&ps_ans>;
+
+ apple,sart = <&sart>;
+ };
};
timer {
--
2.55.0