linux-kernel - [PATCH DNM v2 4/5] arm64: dts: qcom: qcs6490-radxa-dragon-q6a: Enable UFS controller

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Message-Id: <20250914-radxa-dragon-q6a-v2-4-045f7e92b3bb@radxa.com>
Date: Sun, 14 Sep 2025 23:57:07 +0800
From: Xilin Wu <sophon@...xa.com>
To: Bjorn Andersson <andersson@...nel.org>, 
 Konrad Dybcio <konradybcio@...nel.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>
Cc: linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Neil Armstrong <neil.armstrong@...aro.org>, 
 Viken Dadhaniya <viken.dadhaniya@....qualcomm.com>, 
 Ram Kumar Dwivedi <quic_rdwivedi@...cinc.com>, Xilin Wu <sophon@...xa.com>
Subject: [PATCH DNM v2 4/5] arm64: dts: qcom: qcs6490-radxa-dragon-q6a:
 Enable UFS controller

Add and enable UFS related nodes for this board.

Note that UFS Gear-4 Rate-B is unstable due to board and UFS module design
limitations. UFS on this board is stable when working at Gear-4 Rate-A.

Signed-off-by: Xilin Wu <sophon@...xa.com>

---

This change depends on the following patch series:
https://lore.kernel.org/all/20250902164900.21685-1-quic_rdwivedi@quicinc.com/
---
 .../boot/dts/qcom/qcs6490-radxa-dragon-q6a.dts     | 29 ++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/qcs6490-radxa-dragon-q6a.dts b/arch/arm64/boot/dts/qcom/qcs6490-radxa-dragon-q6a.dts
index d30cddfc3eff07237c7e3480a5d42b29091d87d6..3bf85d68c97891db1f1f0b84fb5649803948e06f 100644
--- a/arch/arm64/boot/dts/qcom/qcs6490-radxa-dragon-q6a.dts
+++ b/arch/arm64/boot/dts/qcom/qcs6490-radxa-dragon-q6a.dts
@@ -482,6 +482,11 @@ &i2c13 {
 	status = "okay";
 };
 
+/* It takes a long time in ufshcd_init_crypto when enabled */
+&ice {
+	status = "disabled";
+};
+
 &lpass_audiocc {
 	compatible = "qcom,qcm6490-lpassaudiocc";
 	/delete-property/ power-domains;
@@ -938,6 +943,30 @@ &uart5 {
 	status = "okay";
 };
 
+&ufs_mem_hc {
+	reset-gpios = <&tlmm 175 GPIO_ACTIVE_LOW>;
+	vcc-supply = <&vreg_l7b_2p96>;
+	vcc-max-microamp = <800000>;
+	vccq-supply = <&vreg_l9b_1p2>;
+	vccq-max-microamp = <900000>;
+	vccq2-supply = <&vreg_l9b_1p2>;
+	vccq2-max-microamp = <1300000>;
+
+	/* Gear-4 Rate-B is unstable due to board */
+	/* and UFS module design limitations */
+	limit-rate = "rate-a";
+	/delete-property/ qcom,ice;
+
+	status = "okay";
+};
+
+&ufs_mem_phy {
+	vdda-phy-supply = <&vreg_l10c_0p88>;
+	vdda-pll-supply = <&vreg_l6b_1p2>;
+
+	status = "okay";
+};
+
 &usb_2 {
 	dr_mode = "host";
 

-- 
2.51.0