From: Mukesh Kumar Savaliya <mukesh.savaliya@oss.qualcomm.com>
To: viken.dadhaniya@oss.qualcomm.com, andi.shyti@kernel.org,
robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org,
vkoul@kernel.org, Frank.Li@kernel.org, andersson@kernel.org,
konradybcio@kernel.org, dmitry.baryshkov@oss.qualcomm.com,
linmq006@gmail.com, quic_jseerapu@quicinc.com, agross@kernel.org,
linux-arm-msm@vger.kernel.org, linux-i2c@vger.kernel.org,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
dmaengine@vger.kernel.org
Cc: krzysztof.kozlowski@oss.qualcomm.com,
bartosz.golaszewski@oss.qualcomm.com,
bjorn.andersson@oss.qualcomm.com, konrad.dybcio@oss.qualcomm.com,
Mukesh Kumar Savaliya <mukesh.savaliya@oss.qualcomm.com>
Subject: [PATCH v7 1/4] dt-bindings: i2c: qcom,i2c-geni: Document multi-owner controller support
Date: Thu, 23 Apr 2026 20:25:48 +0530 [thread overview]
Message-ID: <20260423145705.545552-2-mukesh.savaliya@oss.qualcomm.com> (raw)
In-Reply-To: <20260423145705.545552-1-mukesh.savaliya@oss.qualcomm.com>
Document a DeviceTree property to describe QUP-based I2C controllers that
are shared with one or more other system processors.
On some Qualcomm platforms, a QUP-based I2C controller may be accessed by
multiple system processors (for example, APPS and DSP). In such
configurations, the operating system must not assume exclusive ownership
of the controller or its associated hardware resources.
The new qcom,qup-multi-owner property indicates that the controller is
externally shared and that the operating system must avoid operations
which rely on sole control of the hardware.
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Mukesh Kumar Savaliya <mukesh.savaliya@oss.qualcomm.com>
---
.../devicetree/bindings/i2c/qcom,i2c-geni-qcom.yaml | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/Documentation/devicetree/bindings/i2c/qcom,i2c-geni-qcom.yaml b/Documentation/devicetree/bindings/i2c/qcom,i2c-geni-qcom.yaml
index 51534953a69c..9401dc2d5052 100644
--- a/Documentation/devicetree/bindings/i2c/qcom,i2c-geni-qcom.yaml
+++ b/Documentation/devicetree/bindings/i2c/qcom,i2c-geni-qcom.yaml
@@ -60,6 +60,13 @@ properties:
power-domains:
maxItems: 1
+ qcom,qup-multi-owner:
+ type: boolean
+ description:
+ Indicates that the QUP-based controller is shared with one or more
+ other system processors and must not be assumed to have exclusive
+ ownership by the operating system.
+
reg:
maxItems: 1
--
2.43.0
next prev parent reply other threads:[~2026-04-23 14:57 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-23 14:55 [PATCH v7 0/4] Enable multi-owner I2C support for QCOM GENI controllers Mukesh Kumar Savaliya
2026-04-23 14:55 ` Mukesh Kumar Savaliya [this message]
2026-04-23 14:55 ` [PATCH v7 2/4] dmaengine: qcom: gpi: Add lock/unlock TREs for multi-owner I2C transfers Mukesh Kumar Savaliya
2026-04-23 14:55 ` [PATCH v7 3/4] soc: qcom: geni-se: Keep pinctrl active for multi-owner controllers Mukesh Kumar Savaliya
2026-04-23 14:55 ` [PATCH v7 4/4] i2c: qcom-geni: Support multi-owner controllers in GPI mode Mukesh Kumar Savaliya
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