linux-kernel - [PATCH] riscv: dts: spacemit: enable eMMC for K1 SoC

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Message-Id: <20250523-22-k1-sdhci-v1-1-6e0adddf7494@gentoo.org>
Date: Fri, 23 May 2025 21:21:04 +0800
From: Yixun Lan <dlan@...too.org>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Paul Walmsley <paul.walmsley@...ive.com>, 
 Palmer Dabbelt <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>, 
 Alexandre Ghiti <alex@...ti.fr>
Cc: Ulf Hansson <ulf.hansson@...aro.org>, linux-mmc@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-riscv@...ts.infradead.org, 
 spacemit@...ts.linux.dev, linux-kernel@...r.kernel.org, 
 Yixun Lan <dlan@...too.org>
Subject: [PATCH] riscv: dts: spacemit: enable eMMC for K1 SoC

Enable eMMC support for SpacemiT K1 SoC, successfully tested on
Bananapi-F3 board which shipped with a 16GB eMMC chip - KLMAG1JETD-B041.

Signed-off-by: Yixun Lan <dlan@...too.org>
---
Adjust DTS to enable eMMC support for K1 SoC, tested on Bananapi-F3
board.

This patch is currently based on SpacemiT SoC tree[1] for-next branch.

Link: https://github.com/spacemit-com/linux/ [1]
---
 arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts | 10 ++++++++++
 arch/riscv/boot/dts/spacemit/k1.dtsi            |  9 +++++++++
 2 files changed, 19 insertions(+)

diff --git a/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts b/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts
index 816ef1bc358ec490aff184d5915d680dbd9f00cb..fe22c747c5012fe56d42ac8a7efdbbdb694f31b6 100644
--- a/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts
+++ b/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts
@@ -30,6 +30,16 @@ led1 {
 	};
 };
 
+&emmc {
+	bus-width = <8>;
+	mmc-hs400-1_8v;
+	mmc-hs400-enhanced-strobe;
+	non-removable;
+	no-sd;
+	no-sdio;
+	status = "okay";
+};
+
 &uart0 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&uart0_2_cfg>;
diff --git a/arch/riscv/boot/dts/spacemit/k1.dtsi b/arch/riscv/boot/dts/spacemit/k1.dtsi
index c0f8c5fca975d73b6ea6886da13fcf55289cb16c..14097f1f6f447bd33ff3aaa07382d27ca8e59a48 100644
--- a/arch/riscv/boot/dts/spacemit/k1.dtsi
+++ b/arch/riscv/boot/dts/spacemit/k1.dtsi
@@ -511,6 +511,15 @@ pll: clock-controller@...90000 {
 			#clock-cells = <1>;
 		};
 
+		emmc: mmc@...81000 {
+			compatible = "spacemit,k1-sdhci";
+			reg = <0x0 0xd4281000 0x0 0x200>;
+			clocks = <&syscon_apmu CLK_SDH_AXI>, <&syscon_apmu CLK_SDH2>;
+			clock-names = "core", "io";
+			interrupts = <101>;
+			status = "disabled";
+		};
+
 		syscon_apmu: system-controller@...82800 {
 			compatible = "spacemit,k1-syscon-apmu";
 			reg = <0x0 0xd4282800 0x0 0x400>;

---
base-commit: 3aa64cd126b4fd298ba5d28227ea3f82cd6f541c
change-id: 20250522-22-k1-sdhci-95c759a876b5

Best regards,
-- 
Yixun Lan