While uncommon, some Ax NSP SoCs exist in the wild. This stepping
requires a modified secondary CPU boot-reg and removal of DMA coherency
properties. Without these modifications, the secondary CPU will be
inactive and many peripherals will exhibit undefined behaviour.
Signed-off-by: Matthew Hagan <mnhagan88@xxxxxxxxx>
---
arch/arm/boot/dts/bcm-nsp-ax.dtsi | 70 +++++++++++++++++++++++++++++++
1 file changed, 70 insertions(+)
create mode 100644 arch/arm/boot/dts/bcm-nsp-ax.dtsi
diff --git a/arch/arm/boot/dts/bcm-nsp-ax.dtsi b/arch/arm/boot/dts/bcm-nsp-ax.dtsi
new file mode 100644
index 000000000000..a21e275935ce
--- /dev/null
+++ b/arch/arm/boot/dts/bcm-nsp-ax.dtsi
@@ -0,0 +1,70 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+/*
+ * Broadcom Northstar Plus Ax stepping-specific bindings.
+ * Notable differences from B0+ are the secondary-boot-reg and
+ * lack of DMA coherency.
+ */
+
+&cpu1 {
+ secondary-boot-reg = <0xffff042c>;
+};
+
+&dma {
+ /delete-property/ dma-coherent;
+};
+
+&sdio {
+ /delete-property/ dma-coherent;
+};
+
+&amac0 {
+ /delete-property/ dma-coherent;
+};
+
+&amac1 {
+ /delete-property/ dma-coherent;
+};
+
+&amac2 {
+ /delete-property/ dma-coherent;
+};
+
+&ehci0 {
+ /delete-property/ dma-coherent;
+};
+
+&mailbox {
+ /delete-property/ dma-coherent;
+};
+
+&xhci {
+ /delete-property/ dma-coherent;
+};
+
+&ehci0 {
+ /delete-property/ dma-coherent;
+};
+
+&ohci0 {
+ /delete-property/ dma-coherent;
+};
+
+&i2c0 {
+ /delete-property/ dma-coherent;
+};
+
+&sata {
+ /delete-property/ dma-coherent;
+};
+
+&pcie0 {
+ /delete-property/ dma-coherent;
+};
+
+&pcie1 {
+ /delete-property/ dma-coherent;
+};
+
+&pcie2 {
+ /delete-property/ dma-coherent;
+};
--
2.26.3
