linux-kernel - [PATCH 18/31] ARM: dts: rockchip: Enable SMP bringup for RK312x

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Message-ID: <20230829171647.187787-19-knaerzche@gmail.com>
Date:   Tue, 29 Aug 2023 19:16:34 +0200
From:   Alex Bee <knaerzche@...il.com>
To:     Heiko Stuebner <heiko@...ech.de>, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>, Lee Jones <lee@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>, Vinod Koul <vkoul@...nel.org>,
        Kishon Vijay Abraham I <kishon@...nel.org>
Cc:     Elaine Zhang <zhangqing@...k-chips.com>,
        Johan Jonker <jbx6244@...il.com>, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, alsa-devel@...a-project.org,
        linux-clk@...r.kernel.org, linux-phy@...ts.infradead.org,
        Alex Bee <knaerzche@...il.com>
Subject: [PATCH 18/31] ARM: dts: rockchip: Enable SMP bringup for RK312x

For bringup of the non-boot cpu cores the enable-method for RK3036 can be
re-used.

This adds a (small) chunk  of SRAM for execution of the SMP trampoline code
and the respective enable-method property to the cpus.

Signed-off-by: Alex Bee <knaerzche@...il.com>
---
 arch/arm/boot/dts/rockchip/rk312x.dtsi | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/arm/boot/dts/rockchip/rk312x.dtsi b/arch/arm/boot/dts/rockchip/rk312x.dtsi
index b195ac525c37..08b953b005ff 100644
--- a/arch/arm/boot/dts/rockchip/rk312x.dtsi
+++ b/arch/arm/boot/dts/rockchip/rk312x.dtsi
@@ -27,6 +27,7 @@ arm-pmu {
 	cpus {
 		#address-cells = <1>;
 		#size-cells = <0>;
+		enable-method = "rockchip,rk3036-smp";
 
 		cpu0: cpu@f00 {
 			device_type = "cpu";
@@ -87,6 +88,11 @@ imem: sram@...80000 {
 		#address-cells = <1>;
 		#size-cells = <1>;
 		ranges = <0 0x10080000 0x2000>;
+
+		smp-sram@0 {
+			compatible = "rockchip,rk3066-smp-sram";
+			reg = <0x00 0x10>;
+		};
 	};
 
 	pmu: syscon@...a0000 {
-- 
2.42.0