linux-kernel - [PATCH] arm64: dts: ti: k3-am62a7-sk: Enable full 4GB DDR

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Message-ID: <20230206115240.6026-1-devarsht@ti.com>
Date:   Mon, 6 Feb 2023 17:22:40 +0530
From:   Devarsh Thakkar <devarsht@...com>
To:     <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <robh+dt@...nel.org>,
        <kristo@...nel.org>, <nm@...com>, <vigneshr@...com>
CC:     <hnagalla@...com>, <praneeth@...com>, <a-bhatia1@...com>,
        <j-luthra@...com>, <devarsht@...com>
Subject: [PATCH] arm64: dts: ti: k3-am62a7-sk: Enable full 4GB DDR

AM62A7-SK board has 4GB LPDDR4 Micron MT53E2G32D4DE-046 AUT:B memory but
only 2GB was enabled early.

Enable full 4GB memory by updating the latter 2GB memory region
which gets mapped to 0x0880000000 i.e. DDR16SS0_SDRAM as referred in
Table 2-1. AM62A Common SoC Memory of AM62Ax TRM.

TRM : https://www.ti.com/lit/zip/spruj16

Logs:
Link : https://gist.github.com/devarsht/e85b6af89c01ddadb3a62f3e5f196af8

Signed-off-by: Devarsh Thakkar <devarsht@...com>
---
 arch/arm64/boot/dts/ti/k3-am62a7-sk.dts | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts b/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts
index 5c9012141ee2..f6a67f072dca 100644
--- a/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts
+++ b/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts
@@ -27,8 +27,9 @@
 
 	memory@...00000 {
 		device_type = "memory";
-		/* 2G RAM */
-		reg = <0x00000000 0x80000000 0x00000000 0x80000000>;
+		/* 4G RAM */
+		reg = <0x00000000 0x80000000 0x00000000 0x80000000>,
+		      <0x00000008 0x80000000 0x00000000 0x80000000>;
 	};
 
 	reserved-memory {
-- 
2.17.1