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

[Alexey Charkov]

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 at gmail.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 at gmail.com>