linux-kernel - [PATCH 4/4] arm64: dts: qcom: sm7225-fairphone-fp4: Enable CCI pull-up

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Message-Id: <20251210-fp4-cam-prep-v1-4-0eacbff271ec@fairphone.com>
Date: Wed, 10 Dec 2025 10:05:30 +0900
From: Luca Weiss <luca.weiss@...rphone.com>
To: Bartosz Golaszewski <brgl@...nel.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Bjorn Andersson <andersson@...nel.org>, 
 Konrad Dybcio <konradybcio@...nel.org>
Cc: ~postmarketos/upstreaming@...ts.sr.ht, phone-devel@...r.kernel.org, 
 linux-i2c@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org, 
 Luca Weiss <luca.weiss@...rphone.com>
Subject: [PATCH 4/4] arm64: dts: qcom: sm7225-fairphone-fp4: Enable CCI
 pull-up

Enable vreg_l6p, which is the voltage source for the pull-up resistor of
the CCI busses.

This ensures that I2C communication works as expected.

Signed-off-by: Luca Weiss <luca.weiss@...rphone.com>
---
 arch/arm64/boot/dts/qcom/sm7225-fairphone-fp4.dts | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sm7225-fairphone-fp4.dts b/arch/arm64/boot/dts/qcom/sm7225-fairphone-fp4.dts
index 0cfb24e3941d..a3c2b26736f4 100644
--- a/arch/arm64/boot/dts/qcom/sm7225-fairphone-fp4.dts
+++ b/arch/arm64/boot/dts/qcom/sm7225-fairphone-fp4.dts
@@ -693,6 +693,8 @@ vreg_l6p: ldo6 {
 				regulator-name = "vreg_l6p";
 				regulator-min-microvolt = <1500000>;
 				regulator-max-microvolt = <1800000>;
+				/* Pull-up for CCI I2C busses */
+				regulator-always-on;
 			};
 
 			vreg_l7p: ldo7 {

-- 
2.52.0