linux-kernel - [PATCH v2 2/2] arm64: dts: broadcom: bcm4908: Fix cpu node for smp boot

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Message-Id: <20220708182507.23542-2-william.zhang@broadcom.com>
Date:   Fri,  8 Jul 2022 11:25:07 -0700
From:   William Zhang <william.zhang@...adcom.com>
To:     Linux ARM List <linux-arm-kernel@...ts.infradead.org>
Cc:     Broadcom Kernel List <bcm-kernel-feedback-list@...adcom.com>,
        William Zhang <william.zhang@...adcom.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Rafał Miłecki <rafal@...ecki.pl>,
        Rob Herring <robh+dt@...nel.org>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2 2/2] arm64: dts: broadcom: bcm4908: Fix cpu node for smp boot

Add spin-table enable-method and cpu-release-addr properties for
cpu0 node. This is required by all ARMv8 SoC. Otherwise some
bootloader like u-boot can not update cpu-release-addr and linux
fails to start up secondary cpus.

Fixes: 2961f69f151c ("arm64: dts: broadcom: add BCM4908 and Asus
GT-AC5300 early DTS files")

Signed-off-by: William Zhang <william.zhang@...adcom.com>
Reviewed-by: Florian Fainelli <f.fainelli@...il.com>

---

Changes in v2:
- Split into two patches and add fix reference

 arch/arm64/boot/dts/broadcom/bcm4908/bcm4908.dtsi | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/boot/dts/broadcom/bcm4908/bcm4908.dtsi b/arch/arm64/boot/dts/broadcom/bcm4908/bcm4908.dtsi
index a4be040a00c0..967d2cd3c3ce 100644
--- a/arch/arm64/boot/dts/broadcom/bcm4908/bcm4908.dtsi
+++ b/arch/arm64/boot/dts/broadcom/bcm4908/bcm4908.dtsi
@@ -29,6 +29,8 @@ cpu0: cpu@0 {
 			device_type = "cpu";
 			compatible = "brcm,brahma-b53";
 			reg = <0x0>;
+			enable-method = "spin-table";
+			cpu-release-addr = <0x0 0xfff8>;
 			next-level-cache = <&l2>;
 		};
 
-- 
2.34.1


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