linux-kernel - [PATCH RFC v3 0/4] spmi: pmic-arb: Add support for multiple buses

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Message-Id: <20240214-spmi-multi-master-support-v3-0-0bae0ef04faf@linaro.org>
Date: Wed, 14 Feb 2024 23:13:45 +0200
From: Abel Vesa <abel.vesa@...aro.org>
To: Stephen Boyd <sboyd@...nel.org>, 
 Matthias Brugger <matthias.bgg@...il.com>, 
 Bjorn Andersson <andersson@...nel.org>, 
 Konrad Dybcio <konrad.dybcio@...aro.org>, 
 Dmitry Baryshkov <dmitry.baryshkov@...aro.org>, 
 Neil Armstrong <neil.armstrong@...aro.org>, 
 AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
Cc: Srini Kandagatla <srinivas.kandagatla@...aro.org>, 
 Johan Hovold <johan@...nel.org>, linux-kernel@...r.kernel.org, 
 linux-arm-kernel@...ts.infradead.org, linux-arm-msm@...r.kernel.org, 
 linux-mediatek@...ts.infradead.org, Abel Vesa <abel.vesa@...aro.org>
Subject: [PATCH RFC v3 0/4] spmi: pmic-arb: Add support for multiple buses

This RFC prepares for and adds support for 2 buses, which is supported
in HW starting with version 7. Until now, none of the currently
supported platforms in upstream have used the second bus. The X1E80100
platform, on the other hand, needs the second bus for the USB2.0 to work
as there are 3 SMB2360 PMICs which provide eUSB2 repeaters and they are
all found on the second bus.

Signed-off-by: Abel Vesa <abel.vesa@...aro.org>
---
Changes in v3:
- Split the change into 3 separate patches. First 2 patches are moving
  apid init and core resources into version specific ops. Third one is
  adding the support for 2 buses and dedicated compatible.
- Added separate bindings patch
- Link to v2: https://lore.kernel.org/r/20240213-spmi-multi-master-support-v2-1-b3b102326906@linaro.org

Changes in v2:
- Reworked it so that it registers a spmi controller for each bus
  rather than relying on the generic framework to pass on the bus
  (master) id.
- Link to v1: https://lore.kernel.org/r/20240207-spmi-multi-master-support-v1-0-ce57f301c7fd@linaro.org

---
Abel Vesa (4):
      dt-bindings: spmi: Add PMIC ARB v7 schema
      spmi: pmic-arb: Make the APID init a version operation
      spmi: pmic-arb: Make core resources acquiring a version operation
      spmi: pmic-arb: Add multi bus support

 .../bindings/spmi/qcom,spmi-pmic-arb-v7.yaml       | 119 +++
 drivers/spmi/spmi-pmic-arb.c                       | 956 +++++++++++++--------
 2 files changed, 712 insertions(+), 363 deletions(-)
---
base-commit: 2c3b09aac00d7835023bbc4473ee06696be64fa8
change-id: 20240207-spmi-multi-master-support-832a704b779b

Best regards,
-- 
Abel Vesa <abel.vesa@...aro.org>