linux-kernel - [PATCH v2] arm64: dts: qcom: qcm6490-fairphone-fp5: Enable UFS

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Message-Id: <20231002-fp5-ufs-v2-1-e2d7de522134@fairphone.com>
Date:   Mon, 02 Oct 2023 14:30:41 +0200
From:   Luca Weiss <luca.weiss@...rphone.com>
To:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Nitin Rawat <quic_nitirawa@...cinc.com>
Cc:     ~postmarketos/upstreaming@...ts.sr.ht, phone-devel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, Luca Weiss <luca.weiss@...rphone.com>
Subject: [PATCH v2] arm64: dts: qcom: qcm6490-fairphone-fp5: Enable UFS

Enable the UFS phy and controller so that we can access the internal
storage of the phone.

At the same time we need to bump the minimum voltage used for UFS VCC,
otherwise it doesn't initialize properly. The 2.952V is taken from the
vcc-voltage-level property downstream.

See also the following link for more information about the VCCQ/VCCQ2:
https://gerrit-public.fairphone.software/plugins/gitiles/kernel/msm-extra/devicetree/+/1590a3739e7dc29d2597307881553236d492f188/fp5/yupik-idp-pm7250b.dtsi#207

Signed-off-by: Luca Weiss <luca.weiss@...rphone.com>
---
Depends on: https://lore.kernel.org/linux-arm-msm/20230927081858.15961-1-quic_nitirawa@quicinc.com/
---
Changes in v2:
- Constrain UFS voltage to only 2.952V
- Link to v1: https://lore.kernel.org/r/20230929-fp5-ufs-v1-1-122941e28b06@fairphone.com
---
 arch/arm64/boot/dts/qcom/qcm6490-fairphone-fp5.dts | 27 ++++++++++++++++++++--
 1 file changed, 25 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/qcm6490-fairphone-fp5.dts b/arch/arm64/boot/dts/qcom/qcm6490-fairphone-fp5.dts
index 2de0b8c26c35..762c5db29520 100644
--- a/arch/arm64/boot/dts/qcom/qcm6490-fairphone-fp5.dts
+++ b/arch/arm64/boot/dts/qcom/qcm6490-fairphone-fp5.dts
@@ -182,8 +182,9 @@ vreg_l6b: ldo6 {
 		};
 
 		vreg_l7b: ldo7 {
-			regulator-min-microvolt = <2400000>;
-			regulator-max-microvolt = <3544000>;
+			/* Constrained for UFS VCC, at least until UFS driver scales voltage */
+			regulator-min-microvolt = <2952000>;
+			regulator-max-microvolt = <2952000>;
 			regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
 		};
 
@@ -632,6 +633,28 @@ bluetooth: bluetooth {
 	};
 };
 
+&ufs_mem_hc {
+	reset-gpios = <&tlmm 175 GPIO_ACTIVE_LOW>;
+
+	vcc-supply = <&vreg_l7b>;
+	vcc-max-microamp = <800000>;
+	/*
+	 * Technically l9b enables an eLDO (supplied by s1b) which then powers
+	 * VCCQ2 of the UFS.
+	 */
+	vccq-supply = <&vreg_l9b>;
+	vccq-max-microamp = <900000>;
+
+	status = "okay";
+};
+
+&ufs_mem_phy {
+	vdda-phy-supply = <&vreg_l10c>;
+	vdda-pll-supply = <&vreg_l6b>;
+
+	status = "okay";
+};
+
 &usb_1 {
 	status = "okay";
 };

---
base-commit: d85348daa4407216e47198ed35a43a66883edab6
change-id: 20230929-fp5-ufs-e2c0e21a0142

Best regards,
-- 
Luca Weiss <luca.weiss@...rphone.com>