linux-kernel - [PATCH v1] arm64: dts: rockchip: Add cache information to the Rockchip RK3566 and RK3568 SoC

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Date: Mon, 26 Feb 2024 23:53:03 +0530
From: Anand Moon <linux.amoon@...il.com>
To: Rob Herring <robh+dt@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Heiko Stuebner <heiko@...ech.de>
Cc: Anand Moon <linux.amoon@...il.com>,
	devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-rockchip@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v1] arm64: dts: rockchip: Add cache information to the Rockchip RK3566 and RK3568 SoC

As per RK3568 Datasheet and TRM add missing cache information to
the Rockchip RK3566 and RK3568 SoC.

- Each Cortex-A55 core has 32KB of L1 instruction cache available and
	32KB of L1 data cache available with ECC.
- Along with 512KB Unified L3 cache with ECC.

With adding instruction cache and data cache and a write buffer to
reduce the effect of main memory bandwidth and latency on data
access performance.

Signed-off-by: Anand Moon <linux.amoon@...il.com>
---
[0] http://www.rock-chips.com/uploads/pdf/2022.8.26/191/RK3568%20Brief%20Datasheet.pdf
[1] https://dl.radxa.com/rock3/docs/hw/datasheet/Rockchip%20RK3568%20TRM%20Part1%20V1.1-20210301.pdf
---
 arch/arm64/boot/dts/rockchip/rk356x.dtsi | 37 ++++++++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk356x.dtsi b/arch/arm64/boot/dts/rockchip/rk356x.dtsi
index c19c0f1b3778..49235efefb6b 100644
--- a/arch/arm64/boot/dts/rockchip/rk356x.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk356x.dtsi
@@ -56,6 +56,13 @@ cpu0: cpu@0 {
 			clocks = <&scmi_clk 0>;
 			#cooling-cells = <2>;
 			enable-method = "psci";
+			d-cache-line-size = <32>;
+			d-cache-size = <0x8000>;
+			d-cache-sets = <32>;
+			i-cache-line-size = <32>;
+			i-cache-size = <0x8000>;
+			i-cache-sets = <32>;
+			next-level-cache = <&l2>;
 			operating-points-v2 = <&cpu0_opp_table>;
 		};
 
@@ -65,6 +72,13 @@ cpu1: cpu@100 {
 			reg = <0x0 0x100>;
 			#cooling-cells = <2>;
 			enable-method = "psci";
+			d-cache-line-size = <32>;
+			d-cache-size = <0x8000>;
+			d-cache-sets = <32>;
+			i-cache-line-size = <32>;
+			i-cache-size = <0x8000>;
+			i-cache-sets = <32>;
+			next-level-cache = <&l2>;
 			operating-points-v2 = <&cpu0_opp_table>;
 		};
 
@@ -74,6 +88,13 @@ cpu2: cpu@200 {
 			reg = <0x0 0x200>;
 			#cooling-cells = <2>;
 			enable-method = "psci";
+			d-cache-line-size = <32>;
+			d-cache-size = <0x8000>;
+			d-cache-sets = <32>;
+			i-cache-line-size = <32>;
+			i-cache-size = <0x8000>;
+			i-cache-sets = <32>;
+			next-level-cache = <&l2>;
 			operating-points-v2 = <&cpu0_opp_table>;
 		};
 
@@ -83,8 +104,24 @@ cpu3: cpu@300 {
 			reg = <0x0 0x300>;
 			#cooling-cells = <2>;
 			enable-method = "psci";
+			d-cache-line-size = <32>;
+			d-cache-size = <0x8000>;
+			d-cache-sets = <32>;
+			i-cache-line-size = <32>;
+			i-cache-size = <0x8000>;
+			i-cache-sets = <32>;
+			next-level-cache = <&l2>;
 			operating-points-v2 = <&cpu0_opp_table>;
 		};
+
+		l2: l2-cache0 {
+			compatible = "cache";
+			cache-level = <3>;
+			cache-unified;
+			cache-size = <0x7d000>; /* L3. 512 KB */
+			cache-line-size = <64>;
+			cache-sets = <512>;
+		};
 	};
 
 	cpu0_opp_table: opp-table-0 {
-- 
2.43.0