linux-kernel - [PATCH 0/6] soc: qcom: add support for the I2C Master Hub

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Date:   Wed, 16 Nov 2022 11:21:47 +0100
From:   Neil Armstrong <neil.armstrong@...aro.org>
To:     Rob Herring <robh+dt@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Andy Gross <agross@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Bjorn Andersson <andersson@...nel.org>
Cc:     linux-i2c@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        Neil Armstrong <neil.armstrong@...aro.org>
Subject: [PATCH 0/6] soc: qcom: add support for the I2C Master Hub

The I2C Master Hub is a stripped down version of the GENI Serial Engine
QUP Wrapper Controller but only supporting I2C serial engines without
DMA support.

The I2C Master Hub only supports a variant of the I2C serial engine with:
- a separate "core" clock
- no DMA support
- non discoverable fixed FIFO size

Since DMA isn't supported, the wrapper doesn't need the Master AHB clock
and the iommus property neither.

This patchset adds the bindings changes to the QUPv3 wrapper and I2C serial
element bindings to reflect the different resources requirements.

In order to reuse the QUPv3 wrapper and I2C serial element driver support,
the I2C Master Hub requirements are expressed in new desc structs passed
as device match data.

To: Andy Gross <agross@...nel.org>
To: Bjorn Andersson <andersson@...nel.org>
To: Konrad Dybcio <konrad.dybcio@...ainline.org>
To: Rob Herring <robh+dt@...nel.org>
To: Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc: linux-arm-msm@...r.kernel.org
Cc: devicetree@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
Cc: linux-i2c@...r.kernel.org
Signed-off-by: Neil Armstrong <neil.armstrong@...aro.org>

---
Neil Armstrong (6):
      dt-bindings: qcom: geni-se: document I2C Master Hub wrapper variant
      dt-bindings: i2c: qcom-geni: document I2C Master Hub serial I2C engine
      soc: qcom: geni-se: add desc struct to specify clocks from device match data
      soc: qcom: geni-se: add support for I2C Master Hub wrapper variant
      i2c: qcom-geni: add desc struct to prepare support for I2C Master Hub variant
      i2c: qcom-geni: add support for I2C Master Hub variant

 .../bindings/i2c/qcom,i2c-geni-qcom.yaml           | 61 ++++++++++++++++----
 .../devicetree/bindings/soc/qcom/qcom,geni-se.yaml | 43 +++++++++++---
 drivers/i2c/busses/i2c-qcom-geni.c                 | 58 ++++++++++++++++++-
 drivers/soc/qcom/qcom-geni-se.c                    | 67 +++++++++++++++++-----
 4 files changed, 192 insertions(+), 37 deletions(-)
---
base-commit: 3c1f24109dfc4fb1a3730ed237e50183c6bb26b3
change-id: 20221114-narmstrong-sm8550-upstream-i2c-master-hub-44a7fb19475e

Best regards,
-- 
Neil Armstrong <neil.armstrong@...aro.org>