From fd7b48b1f91e1830e22e73744e7525af24d8ae25 Mon Sep 17 00:00:00 2001 From: Anand Moon Date: Mon, 25 Aug 2025 12:21:42 +0530 Subject: [PATCH] arm64: dts: amlogic: Add cache information to the Amlogic SM1 SoC As per S905X3 datasheet add missing cache information to the Amlogic SM1 SoC. ARM Cortex-A55 CPU uses unified L3 cache instead of L2 cache. - Each Cortex-A55 core has 32KB of L1 instruction cache available and 32KB of L1 data cache available. - Along with 256KB Unified L2 cache. Cache memory significantly reduces the time it takes for the CPU to access data and instructions, leading to faster program execution and overall system responsiveness. Signed-off-by: Anand Moon Link: https://lore.kernel.org/r/20250825065240.22577-3-linux.amoon@gmail.com Signed-off-by: Neil Armstrong --- arch/arm64/boot/dts/amlogic/meson-sm1.dtsi | 27 ++++++++++++++++++++++ 1 file changed, 27 insertions(+) diff --git a/arch/arm64/boot/dts/amlogic/meson-sm1.dtsi b/arch/arm64/boot/dts/amlogic/meson-sm1.dtsi index 966ebb19cc55f..e5db8ce940620 100644 --- a/arch/arm64/boot/dts/amlogic/meson-sm1.dtsi +++ b/arch/arm64/boot/dts/amlogic/meson-sm1.dtsi @@ -55,6 +55,12 @@ compatible = "arm,cortex-a55"; reg = <0x0 0x0>; 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>; #cooling-cells = <2>; }; @@ -64,6 +70,12 @@ compatible = "arm,cortex-a55"; reg = <0x0 0x1>; 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>; #cooling-cells = <2>; }; @@ -73,6 +85,12 @@ compatible = "arm,cortex-a55"; reg = <0x0 0x2>; 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>; #cooling-cells = <2>; }; @@ -82,6 +100,12 @@ compatible = "arm,cortex-a55"; reg = <0x0 0x3>; 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>; #cooling-cells = <2>; }; @@ -90,6 +114,9 @@ compatible = "cache"; cache-level = <2>; cache-unified; + cache-size = <0x40000>; /* L2. 256 KB */ + cache-line-size = <64>; + cache-sets = <256>; }; }; -- 2.47.3