linux-kernel - [PATCH 4/4] riscv: dts: spacemit: add eMMC to OrangePi R2S

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Message-ID: <20251109222858.3085488-5-michael.opdenacker@rootcommit.com>
Date: Sun,  9 Nov 2025 22:30:12 +0000 (UTC)
From: michael.opdenacker@...tcommit.com
To: Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Paul Walmsley <pjw@...nel.org>,
	Palmer Dabbelt <palmer@...belt.com>,
	Albert Ou <aou@...s.berkeley.edu>,
	Alexandre Ghiti <alex@...ti.fr>,
	Yixun Lan <dlan@...too.org>
Cc: Michael Opdenacker <michael.opdenacker@...tcommit.com>,
	devicetree@...r.kernel.org,
	linux-riscv@...ts.infradead.org,
	spacemit@...ts.linux.dev,
	linux-kernel@...r.kernel.org
Subject: [PATCH 4/4] riscv: dts: spacemit: add eMMC to OrangePi R2S

From: Michael Opdenacker <michael.opdenacker@...tcommit.com>

The OrangePi R2S board includes a 8 GB eMMC chip for storage.

It works fine with the same description as on the BananaPi F3 board DTS.

Signed-off-by: Michael Opdenacker <michael.opdenacker@...tcommit.com>

---

Read tests
----------

hdparm -t --direct /dev/mmcblk0

/dev/mmcblk0:
Timing O_DIRECT disk reads: 846 MB in 3.01 seconds = 281.52 MB/sec

Write tests
-----------

dd if=/dev/zero of=/dev/mmcblk0p2 bs=4M oflag=direct status=progress
7600078848 bytes (7.6 GB, 7.1 GiB) copied, 127 s, 59.8 MB/s
dd: error writing '/dev/mmcblk0p2': No space left on device
1825+0 records in
1824+0 records out
7650410496 bytes (7.7 GB, 7.1 GiB) copied, 127.866 s, 59.8 MB/s
---
 arch/riscv/boot/dts/spacemit/k1-orangepi-r2s.dts | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/arch/riscv/boot/dts/spacemit/k1-orangepi-r2s.dts b/arch/riscv/boot/dts/spacemit/k1-orangepi-r2s.dts
index a4007a7a1656..58098c4a2aab 100644
--- a/arch/riscv/boot/dts/spacemit/k1-orangepi-r2s.dts
+++ b/arch/riscv/boot/dts/spacemit/k1-orangepi-r2s.dts
@@ -23,6 +23,16 @@ chosen {
 	};
 };
 
+&emmc {
+	bus-width = <8>;
+	mmc-hs400-1_8v;
+	mmc-hs400-enhanced-strobe;
+	non-removable;
+	no-sd;
+	no-sdio;
+	status = "okay";
+};
+
 &eth0 {
 	phy-handle = <&rgmii0>;
 	phy-mode = "rgmii-id";