linux-kernel - [PATCH v3 0/2] Qualcomm PCIe RC shutdown & reinit

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Message-Id: <20240210-topic-8280_pcie-v3-0-ee7af6f892a0@linaro.org>
Date: Wed, 27 Mar 2024 20:49:07 +0100
From: Konrad Dybcio <konrad.dybcio@...aro.org>
To: Bjorn Andersson <andersson@...nel.org>, 
 Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>, 
 Lorenzo Pieralisi <lpieralisi@...nel.org>, 
 Krzysztof Wilczyński <kw@...ux.com>, 
 Rob Herring <robh@...nel.org>, Bjorn Helgaas <bhelgaas@...gle.com>, 
 Philipp Zabel <p.zabel@...gutronix.de>
Cc: linux-arm-msm@...r.kernel.org, linux-pci@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Johan Hovold <johan+linaro@...nel.org>, 
 Marijn Suijten <marijn.suijten@...ainline.org>, 
 Konrad Dybcio <konrad.dybcio@...aro.org>, 
 Bjorn Andersson <quic_bjorande@...cinc.com>
Subject: [PATCH v3 0/2] Qualcomm PCIe RC shutdown & reinit

Changes in v3:
- Drop "Read back PARF_LTSSM register"
- Drop unnecessary inclusion of qcom,rpm-icc.h
- Fix a couple of commit msg typos
- Rebase, resolve some conflicts
- Link to v2: https://lore.kernel.org/r/20240210-topic-8280_pcie-v2-0-1cef4b606883@linaro.org

Qualcomm PCIe RC shutdown & reinit

This series implements shutdown & reinitialization of the PCIe RC on
system suspend. Tested on 8280-crd.

Changes in v2:
* Rebase
* Get rid of "Cache last icc bandwidth", use icc_enable instead
* Don't permanently assert reset on clk enable fail in "Reshuffle reset.."
* Drop fixes tag in "Reshuffle reset.."
* Improve commit messages of "Reshuffle reset.." and "Implement RC shutdown.."
* Only set icc tag on RPMh SoCs
* Pick up rb
Link to v1: https://lore.kernel.org/linux-arm-msm/20231227-topic-8280_pcie-v1-0-095491baf9e4@linaro.org/

Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>
---
Konrad Dybcio (2):
      PCI: qcom: reshuffle reset logic in 2_7_0 .init
      PCI: qcom: properly implement RC shutdown/power up

 drivers/pci/controller/dwc/Kconfig     |   1 +
 drivers/pci/controller/dwc/pcie-qcom.c | 176 ++++++++++++++++++++++++---------
 2 files changed, 133 insertions(+), 44 deletions(-)
---
base-commit: 26074e1be23143b2388cacb36166766c235feb7c
change-id: 20240210-topic-8280_pcie-c94f58158029

Best regards,
-- 
Konrad Dybcio <konrad.dybcio@...aro.org>