linux-kernel - [RFC PATCH] riscv: dts: nezha-d1: Add memory

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Message-Id: <20230331182727.4062790-1-evan@rivosinc.com>
Date:   Fri, 31 Mar 2023 11:27:27 -0700
From:   Evan Green <evan@...osinc.com>
To:     linux-sunxi@...ts.linux.dev
Cc:     conor.dooley@...rochip.com, Evan Green <evan@...osinc.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Chen-Yu Tsai <wens@...e.org>, Conor Dooley <conor@...nel.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Palmer Dabbelt <palmer@...belt.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Rob Herring <robh+dt@...nel.org>,
        Samuel Holland <samuel@...lland.org>,
        Trevor Woerner <twoerner@...il.com>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-riscv@...ts.infradead.org
Subject: [RFC PATCH] riscv: dts: nezha-d1: Add memory

Add memory info for the D1 Nezha, which seems to be required for it to
boot with the stock firmware. Note that this hardcodes 1GB, which is
not technically correct as they also make models with different amounts
of RAM. Is the firmware supposed to populate this?

Signed-off-by: Evan Green <evan@...osinc.com>

---

 arch/riscv/boot/dts/allwinner/sun20i-d1-nezha.dts | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/riscv/boot/dts/allwinner/sun20i-d1-nezha.dts b/arch/riscv/boot/dts/allwinner/sun20i-d1-nezha.dts
index 4ed33c1e7c9c..6aba68cf5541 100644
--- a/arch/riscv/boot/dts/allwinner/sun20i-d1-nezha.dts
+++ b/arch/riscv/boot/dts/allwinner/sun20i-d1-nezha.dts
@@ -32,6 +32,12 @@ / {
 	model = "Allwinner D1 Nezha";
 	compatible = "allwinner,d1-nezha", "allwinner,sun20i-d1";
 
+	// FIXME: this is temporary.
+	memory@...00000 {
+		device_type = "memory";
+		reg = <0x40000000 0x40000000>; /* 1 GB */
+	};
+
 	aliases {
 		ethernet0 = &emac;
 		ethernet1 = &xr829;
-- 
2.25.1