ARM: dts: bcm2711: Add the missing L1/L2 cache information

This patch fixes the kernel warning
"cacheinfo: Unable to detect cache hierarchy for CPU 0"
for the bcm2711 on newer kernel versions.

Signed-off-by: Richard Schleich <rs@noreya.tech>
Tested-by: Stefan Wahren <stefan.wahren@i2se.com>
[florian: Align and remove comments matching property values]
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>

diff --git a/arch/arm/boot/dts/bcm2711.dtsi b/arch/arm/boot/dts/bcm2711.dtsi
index dff18fc..0f2f26d 100644 (file)
--- a/arch/arm/boot/dts/bcm2711.dtsi
+++ b/arch/arm/boot/dts/bcm2711.dtsi
@@ -458,12 +458,26 @@
                #size-cells = <0>;
                enable-method = "brcm,bcm2836-smp"; // for ARM 32-bit
 
+               /* Source for d/i-cache-line-size and d/i-cache-sets
+                * https://developer.arm.com/documentation/100095/0003
+                * /Level-1-Memory-System/About-the-L1-memory-system?lang=en
+                * Source for d/i-cache-size
+                * https://www.raspberrypi.com/documentation/computers
+                * /processors.html#bcm2711
+                */
                cpu0: cpu@0 {
                        device_type = "cpu";
                        compatible = "arm,cortex-a72";
                        reg = <0>;
                        enable-method = "spin-table";
                        cpu-release-addr = <0x0 0x000000d8>;
+                       d-cache-size = <0x8000>;
+                       d-cache-line-size = <64>;
+                       d-cache-sets = <256>; // 32KiB(size)/64(line-size)=512ways/2-way set
+                       i-cache-size = <0xc000>;
+                       i-cache-line-size = <64>;
+                       i-cache-sets = <256>; // 48KiB(size)/64(line-size)=768ways/3-way set
+                       next-level-cache = <&l2>;
                };
 
                cpu1: cpu@1 {
@@ -472,6 +486,13 @@
                        reg = <1>;
                        enable-method = "spin-table";
                        cpu-release-addr = <0x0 0x000000e0>;
+                       d-cache-size = <0x8000>;
+                       d-cache-line-size = <64>;
+                       d-cache-sets = <256>; // 32KiB(size)/64(line-size)=512ways/2-way set
+                       i-cache-size = <0xc000>;
+                       i-cache-line-size = <64>;
+                       i-cache-sets = <256>; // 48KiB(size)/64(line-size)=768ways/3-way set
+                       next-level-cache = <&l2>;
                };
 
                cpu2: cpu@2 {
@@ -480,6 +501,13 @@
                        reg = <2>;
                        enable-method = "spin-table";
                        cpu-release-addr = <0x0 0x000000e8>;
+                       d-cache-size = <0x8000>;
+                       d-cache-line-size = <64>;
+                       d-cache-sets = <256>; // 32KiB(size)/64(line-size)=512ways/2-way set
+                       i-cache-size = <0xc000>;
+                       i-cache-line-size = <64>;
+                       i-cache-sets = <256>; // 48KiB(size)/64(line-size)=768ways/3-way set
+                       next-level-cache = <&l2>;
                };
 
                cpu3: cpu@3 {
@@ -488,6 +516,28 @@
                        reg = <3>;
                        enable-method = "spin-table";
                        cpu-release-addr = <0x0 0x000000f0>;
+                       d-cache-size = <0x8000>;
+                       d-cache-line-size = <64>;
+                       d-cache-sets = <256>; // 32KiB(size)/64(line-size)=512ways/2-way set
+                       i-cache-size = <0xc000>;
+                       i-cache-line-size = <64>;
+                       i-cache-sets = <256>; // 48KiB(size)/64(line-size)=768ways/3-way set
+                       next-level-cache = <&l2>;
+               };
+
+               /* Source for d/i-cache-line-size and d/i-cache-sets
+                *  https://developer.arm.com/documentation/100095/0003
+                *  /Level-2-Memory-System/About-the-L2-memory-system?lang=en
+                *  Source for d/i-cache-size
+                *  https://www.raspberrypi.com/documentation/computers
+                *  /processors.html#bcm2711
+                */
+               l2: l2-cache0 {
+                       compatible = "cache";
+                       cache-size = <0x100000>;
+                       cache-line-size = <64>;
+                       cache-sets = <1024>; // 1MiB(size)/64(line-size)=16384ways/16-way set
+                       cache-level = <2>;
                };
        };