linux-kernel - [PATCH/RFC 03/15] ARM: shmobile: r8a7790 dtsi: Add L2 cache-controller nodes

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Message-Id: <1433444021-22167-4-git-send-email-geert+renesas@glider.be>
Date:	Thu,  4 Jun 2015 20:53:29 +0200
From:	Geert Uytterhoeven <geert+renesas@...der.be>
To:	Simon Horman <horms@...ge.net.au>,
	Magnus Damm <magnus.damm@...il.com>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Kevin Hilman <khilman@...nel.org>,
	Ulf Hansson <ulf.hansson@...aro.org>,
	Lina Iyer <lina.iyer@...aro.org>,
	Mark Rutland <mark.rutland@....com>,
	Pawel Moll <pawel.moll@....com>
Cc:	linux-pm@...r.kernel.org, devicetree@...r.kernel.org,
	linux-sh@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	Geert Uytterhoeven <geert+renesas@...der.be>
Subject: [PATCH/RFC 03/15] ARM: shmobile: r8a7790 dtsi: Add L2 cache-controller nodes

Add device nodes for the L2 caches:
  - The L2 cache for the Cortex-A15 CPU cores is 2 MiB large (organized
    as 128 KiB x 16 ways), and requires the following settings:
      - Tag RAM latency: 3 cycles,
      - Data RAM latency: 4 cycles,
      - Data RAM setup: 1 cycle,
  - The L2 cache for the Cortex-A7 CPU cores is 512 KiB large (organized
    as 64 KiB x 8 ways).

Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
---
What are the DT bindings for a Cortex-A15 L2 cache controller?
---
 arch/arm/boot/dts/r8a7790.dtsi | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/arch/arm/boot/dts/r8a7790.dtsi b/arch/arm/boot/dts/r8a7790.dtsi
index 7fbcad087ee384e8..729172090f865e4d 100644
--- a/arch/arm/boot/dts/r8a7790.dtsi
+++ b/arch/arm/boot/dts/r8a7790.dtsi
@@ -112,6 +112,30 @@
 		};
 	};
 
+	L2_CA15: cache-controller@0 {
+		compatible = "cache";
+
+		arm,data-latency = <4 4 1>;
+		arm,tag-latency = <3 3 3>;
+		cache-unified;
+		cache-level = <2>;
+		cache-size = <0x200000>;
+		cache-sets = <4096>;
+		cache-block-size = <32>;
+		cache-line-size = <32>;
+	};
+
+	L2_CA7: cache-controller@1 {
+		compatible = "cache";
+
+		cache-unified;
+		cache-level = <2>;
+		cache-size = <0x80000>;
+		cache-sets = <2048>;
+		cache-block-size = <32>;
+		cache-line-size = <32>;
+	};
+
 	gic: interrupt-controller@...01000 {
 		compatible = "arm,cortex-a15-gic";
 		#interrupt-cells = <3>;
-- 
1.9.1

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