[PATCH v7 0/7] Add suspend to ram support for PCIe on J7200

[Thomas Richard]

This adds suspend to ram support for the PCIe (RC mode) on J7200 platform.

In this 7th iteration, the i2c and mux patches were moved to dedicated
series ([1] and [2]).
The patch for the gpio-pca953x driver was removed. It will be sent
separately for further testing and discussion.

No merge conflict with 6.10-rc4.

[1]: https://lore.kernel.org/all/20240613-i2c-omap-wakeup-controller-during-suspend-v1-0-aab001eb1ad1@bootlin.com/
[2]: https://lore.kernel.org/all/20240613-mux-mmio-resume-support-v1-0-4525bf56024a@bootlin.com/

Regards,

Thomas

Signed-off-by: Thomas Richard <thomas.richard at bootlin.com>
---
Changes in v7:
- all: series rebased on Linux 6.10-rc4.
- i2c: patches moved to a dedicated series.
- mux: patches moved to a dedicated series.
- gpio-pca953x: patch removed, will be sent separately.
- Link to v6: https://lore.kernel.org/r/20240102-j7200-pcie-s2r-v6-0-4656ef6e6d66@bootlin.com

Changes in v6:
- i2c-omap: add a patch to remove __maybe_unused attribute of
  omap_i2c_runtime_suspend() and omap_i2c_runtime_resume()
- i2c-omap: fix compile issue if CONFIG_PM_SLEEP is not set
- Link to v5: https://lore.kernel.org/r/20240102-j7200-pcie-s2r-v5-0-4b8c46711ded@bootlin.com

Changes in v5:
- all: series rebased on Linux 6.9-rc1
- pinctrl-single: patch removed (already applied to the pinctrl tree)
- phy: patches moved to a dedicated series.
- pci: add T_PERST_CLK_US macro.
- pci-j721e: update the comments about T_PERST_CLK_US.
- Link to v4: https://lore.kernel.org/r/20240102-j7200-pcie-s2r-v4-0-6f1f53390c85@bootlin.com

Changes in v4:
- all: use SoB/Co-developed-by for patches initially developed by Théo
  Lebrun.
- pinctrl-single: squash the two commits.
- i2c-omap: fix line lenghts of the comment in omap_i2c_suspend().
- mux: mux_chip_resume() return 0 or at the first error.
- phy-j721e-wiz: clean code around dev_err_probe().
- phy-j721e-wiz: use REF_CLK_100MHZ macros.
- pci: fix subject line for all PCI patches.
- pci-cadence: use fsleep() instead of usleep_range().
- pci-cadence: remove cdns_torrent_clk_cleanup() call in
  cdns_torrent_phy_resume_noirq().
- pci-j721e: add a patch to use dev_err_probe() instead of dev_err() in the probe().
- pci-j721e: fix unordered header files.
- pci-j721e: remove some log spammers.
- pci-j721e: add a missing clock disable in j721e_pcie_resume_noirq().
- pci-j721e: simplify the patch "Add reset GPIO to struct j721e_pcie"
- Link to v3: https://lore.kernel.org/r/20240102-j7200-pcie-s2r-v3-0-5c2e4a3fac1f@bootlin.com

Changes in v3:
- pinctrl-single: split patch in two parts, a first patch to remove the
  dead code, a second to move suspend()/resume() callbacks to noirq.
- i2c-omap: add a comments above the suspend_noirq() callback.
- mux: now mux_chip_resume() try to restores all muxes, then return 0 if
  all is ok or the first failure.
- mmio: fix commit message.
- phy-j721e-wiz: add a patch to use dev_err_probe() instead of dev_err() in
  the wiz_clock_init() function.
- phy-j721e-wiz: remove probe boolean for the wiz_clock_init(), rename the
  function to wiz_clock_probe(), extract hardware configuration part in a
  new function wiz_clock_init().
- phy-cadence-torrent: use dev_err_probe() and fix commit messages
- pcie-cadence-host: remove probe boolean for the cdns_pcie_host_setup()
  function and extract the link setup part in a new function
  cdns_pcie_host_link_setup().
- pcie-cadence-host: make cdns_pcie_host_init() global.
- pci-j721e: use the cdns_pcie_host_link_setup() cdns_pcie_host_init()
  functions in the resume_noirq() callback.
- Link to v2: https://lore.kernel.org/r/20240102-j7200-pcie-s2r-v2-0-8e4f7d228ec2@bootlin.com

Changes in v2:
- all: fix commits messages.
- all: use DEFINE_NOIRQ_DEV_PM_OPS and pm_sleep_ptr macros.
- all: remove useless #ifdef CONFIG_PM.
- pinctrl-single: drop dead code
- mux: add mux_chip_resume() function in mux core.
- mmio: resume sequence is now a call to mux_chip_resume().
- phy-cadence-torrent: fix typo in resume sequence (reset_control_assert()
  instead of reset_control_put()).
- phy-cadence-torrent: use PHY instead of phy.
- pci-j721e: do not shadow cdns_pcie_host_setup return code in resume
  sequence.
- pci-j721e: drop dead code.
- Link to v1: https://lore.kernel.org/r/20240102-j7200-pcie-s2r-v1-0-84e55da52400@bootlin.com

---
Thomas Richard (5):
      PCI: cadence: Extract link setup sequence from cdns_pcie_host_setup()
      PCI: cadence: Set cdns_pcie_host_init() global
      PCI: j721e: Use dev_err_probe() in the probe() function
      PCI: Add T_PERST_CLK_US macro
      PCI: j721e: Use T_PERST_CLK_US macro

Théo Lebrun (2):
      PCI: j721e: Add reset GPIO to struct j721e_pcie
      PCI: j721e: Add suspend and resume support

 drivers/pci/controller/cadence/pci-j721e.c         | 121 ++++++++++++++++++---
 drivers/pci/controller/cadence/pcie-cadence-host.c |  44 +++++---
 drivers/pci/controller/cadence/pcie-cadence.h      |  12 ++
 drivers/pci/pci.h                                  |   3 +
 4 files changed, 146 insertions(+), 34 deletions(-)
---
base-commit: 7510725e693fb5e4b4cd17086cc5a49a7a065b9c
change-id: 20240102-j7200-pcie-s2r-ecb1a979e357

Best regards,
-- 
Thomas Richard <thomas.richard at bootlin.com>