linux-kernel - [PATCH v3] arm64: dts: rockchip: enable UFS controller on FriendlyElec NanoPi M5

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Message-Id: <20251230-nanopi-m5-ufs-v3-1-ed188ae34fdb@gmail.com>
Date: Tue, 30 Dec 2025 17:23:34 +0400
From: Alexey Charkov <alchark@...il.com>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Heiko Stuebner <heiko@...ech.de>
Cc: devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 Alexey Charkov <alchark@...il.com>
Subject: [PATCH v3] arm64: dts: rockchip: enable UFS controller on
 FriendlyElec NanoPi M5

The NanoPi M5 board supports pluggable UFS modules using the UFSHC
inside its Rockchip RK3576 SoC.

Enable the respective devicetree node and add its supply regulators.

Link: https://wiki.friendlyelec.com/wiki/images/9/97/NanoPi_M5_LP5_2411_SCH.pdf
Signed-off-by: Alexey Charkov <alchark@...il.com>
---
Changes in v3:
- Dropped 'en-supply' from fixed regulators, as it's not envisaged by the
  fixed regulator driver and seems like more trouble than its worth
- Link to v2: https://lore.kernel.org/r/20251201-nanopi-m5-ufs-v2-1-ece9c0ee17c4@gmail.com

Changes in v2:
- Describe UFS supply regulators
- Add link to schematic
- Link to v1: https://lore.kernel.org/r/20251127-nanopi-m5-ufs-v1-1-0d28d157712c@gmail.com
---
 arch/arm64/boot/dts/rockchip/rk3576-nanopi-m5.dts | 25 +++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3576-nanopi-m5.dts b/arch/arm64/boot/dts/rockchip/rk3576-nanopi-m5.dts
index cce34c541f7c..c5b34069a443 100644
--- a/arch/arm64/boot/dts/rockchip/rk3576-nanopi-m5.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3576-nanopi-m5.dts
@@ -110,6 +110,22 @@ vcc12v_dcin: regulator-vcc12v-dcin {
 		regulator-name = "vcc12v_dcin";
 	};
 
+	vcc1v2_ufs_vccq: regulator-vcc1v2-ufs-vccq {
+		compatible = "regulator-fixed";
+		regulator-min-microvolt = <1200000>;
+		regulator-max-microvolt = <1200000>;
+		regulator-name = "vcc1v2_ufs_vccq";
+		vin-supply = <&vcc5v0_sys_s5>;
+	};
+
+	vcc1v8_ufs_vccq2: regulator-vcc1v8-ufs-vccq2 {
+		compatible = "regulator-fixed";
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <1800000>;
+		regulator-name = "vcc1v8_ufs_vccq2";
+		vin-supply = <&vcc_1v8_s3>;
+	};
+
 	vcc3v3_m2_keym: regulator-vcc3v3-m2-keym {
 		compatible = "regulator-fixed";
 		enable-active-high;
@@ -906,6 +922,15 @@ &uart0 {
 	status = "okay";
 };
 
+&ufshc {
+	vcc-supply = <&vcc_3v3_s3>;
+	vccq-supply = <&vcc1v2_ufs_vccq>;
+	vccq2-supply = <&vcc1v8_ufs_vccq2>;
+	vdd-hba-supply = <&vdda_1v2_s0>;
+
+	status = "okay";
+};
+
 &usbdp_phy {
 	status = "okay";
 };

---
base-commit: cc3aa43b44bdb43dfbac0fcb51c56594a11338a8
change-id: 20251127-nanopi-m5-ufs-52f2c5070167

Best regards,
-- 
Alexey Charkov <alchark@...il.com>