[PATCH 1/3] ARM: dts: microchip: sama5d2: Update the cache configuration for CPU

From: Mihai Sain
Date: Wed Jun 25 2025 - 02:50:47 EST


Add the memory size properties for L1 and L2 according with block
diagram from datasheet:

- L1 cache configuration with 32 KB for both data and instruction cache.
- L2 cache configuration with 128 KB unified cache.

[root@sama5d2 ~]$ lscpu
Architecture: armv7l
Byte Order: Little Endian
CPU(s): 1
On-line CPU(s) list: 0
Vendor ID: ARM
Model name: Cortex-A5
Caches (sum of all):
L1d: 32 KiB (1 instance)
L1i: 32 KiB (1 instance)
L2: 128 KiB (1 instance)

Signed-off-by: Mihai Sain <mihai.sain@xxxxxxxxxxxxx>
---
arch/arm/boot/dts/microchip/sama5d2.dtsi | 3 +++
1 file changed, 3 insertions(+)

diff --git a/arch/arm/boot/dts/microchip/sama5d2.dtsi b/arch/arm/boot/dts/microchip/sama5d2.dtsi
index dc22fb679333..17430d7f2055 100644
--- a/arch/arm/boot/dts/microchip/sama5d2.dtsi
+++ b/arch/arm/boot/dts/microchip/sama5d2.dtsi
@@ -32,6 +32,8 @@ cpu@0 {
device_type = "cpu";
compatible = "arm,cortex-a5";
reg = <0>;
+ d-cache-size = <0x8000>; // L1, 32 KB
+ i-cache-size = <0x8000>; // L1, 32 KB
next-level-cache = <&L2>;
};
};
@@ -160,6 +162,7 @@ L2: cache-controller@a00000 {
interrupts = <63 IRQ_TYPE_LEVEL_HIGH 4>;
cache-unified;
cache-level = <2>;
+ cache-size = <0x20000>; // L2, 128 KB
};

ebi: ebi@10000000 {
--
2.50.0