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From: Matthew Hagan <mnhagan88@gmail.com>
To: unlisted-recipients:; (no To-header on input)
Cc: Vladimir Oltean <olteanv@gmail.com>,
	Florian Fainelli <f.fainelli@gmail.com>,
	Matthew Hagan <mnhagan88@gmail.com>,
	Rob Herring <robh+dt@kernel.org>, Arnd Bergmann <arnd@arndb.de>,
	Olof Johansson <olof@lixom.net>,
	soc@kernel.org, Ray Jui <rjui@broadcom.com>,
	Scott Branden <sbranden@broadcom.com>,
	bcm-kernel-feedback-list@broadcom.com,
	Krzysztof Kozlowski <krzk@kernel.org>,
	Viresh Kumar <viresh.kumar@linaro.org>,
	Geert Uytterhoeven <geert+renesas@glider.be>,
	devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH v5 2/5] ARM: dts: NSP: Add Ax stepping modifications
Date: Fri,  6 Aug 2021 21:44:33 +0100	[thread overview]
Message-ID: <20210806204446.2981299-3-mnhagan88@gmail.com> (raw)
In-Reply-To: <20210806204446.2981299-1-mnhagan88@gmail.com>

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>
---
 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


  parent reply	other threads:[~2021-08-06 20:45 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-06 20:44 [PATCH v5 0/5] ARM: dts: NSP: add Meraki MX64/MX65 series Matthew Hagan
2021-08-06 20:44 ` [PATCH v5 1/5] ARM: dts: NSP: Add common bindings for MX64/MX65 Matthew Hagan
2021-08-22 19:06   ` Florian Fainelli
2021-08-06 20:44 ` Matthew Hagan [this message]
2021-08-22 19:07   ` [PATCH v5 2/5] ARM: dts: NSP: Add Ax stepping modifications Florian Fainelli
2021-08-06 20:44 ` [PATCH v5 3/5] ARM: dts: NSP: Add DT files for Meraki MX64 series Matthew Hagan
2021-08-22 19:07   ` Florian Fainelli
2021-08-06 20:44 ` [PATCH v5 4/5] ARM: dts: NSP: Add DT files for Meraki MX65 series Matthew Hagan
2021-08-22 19:08   ` Florian Fainelli
2021-08-06 20:44 ` [PATCH v5 5/5] dt-bindings: arm: bcm: NSP: add Meraki MX64/MX65 Matthew Hagan
2021-08-22 19:11   ` Florian Fainelli
2021-08-22 19:11 ` [PATCH v5 0/5] ARM: dts: NSP: add Meraki MX64/MX65 series Florian Fainelli

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