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

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Message-ID: <20250625064934.4828-2-mihai.sain@microchip.com>
Date: Wed, 25 Jun 2025 09:49:32 +0300
From: Mihai Sain <mihai.sain@...rochip.com>
To: <nicolas.ferre@...rochip.com>, <alexandre.belloni@...tlin.com>,
	<claudiu.beznea@...on.dev>, <robh@...nel.org>, <krzk+dt@...nel.org>,
	<conor+dt@...nel.org>, <linux-arm-kernel@...ts.infradead.org>,
	<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC: Mihai Sain <mihai.sain@...rochip.com>
Subject: [PATCH 1/3] ARM: dts: microchip: sama5d2: Update the cache configuration for CPU

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@...a5d2 ~]$ 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@...rochip.com>
---
 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@...000 {
 			interrupts = <63 IRQ_TYPE_LEVEL_HIGH 4>;
 			cache-unified;
 			cache-level = <2>;
+			cache-size = <0x20000>;		// L2, 128 KB
 		};
 
 		ebi: ebi@...00000 {
-- 
2.50.0