1 files changed, 90 insertions, 0 deletions
diff --git a/target/linux/bcm53xx/patches-5.10/033-v5.15-0007-ARM-dts-NSP-Add-Ax-stepping-modifications.patch b/target/linux/bcm53xx/patches-5.10/033-v5.15-0007-ARM-dts-NSP-Add-Ax-stepping-modifications.patch
new file mode 100644
index 0000000000..39a69bd9a8
--- /dev/null
+++ b/target/linux/bcm53xx/patches-5.10/033-v5.15-0007-ARM-dts-NSP-Add-Ax-stepping-modifications.patch
@@ -0,0 +1,90 @@
+From 2addf9266a1d0f4ba59c9868b3effcd50de441a4 Mon Sep 17 00:00:00 2001
+From: Matthew Hagan <mnhagan88@gmail.com>
+Date: Fri, 6 Aug 2021 21:44:33 +0100
+Subject: [PATCH] ARM: dts: NSP: Add Ax stepping modifications
+
+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@gmail.com>
+Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
+---
+ 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
+
+--- /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;
++};