linux-kernel - [PATCH v3 0/7] PCI: imx6: refine codes and add compliance tests mode support

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Message-Id: <1634886750-13861-1-git-send-email-hongxing.zhu@nxp.com>
Date:   Fri, 22 Oct 2021 15:12:23 +0800
From:   Richard Zhu <hongxing.zhu@....com>
To:     l.stach@...gutronix.de, bhelgaas@...gle.com,
        lorenzo.pieralisi@....com, jingoohan1@...il.com
Cc:     linux-pci@...r.kernel.org, linux-imx@....com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        kernel@...gutronix.de
Subject: [PATCH v3 0/7] PCI: imx6: refine codes and add compliance tests mode support

This series patches refine pci-imx6 driver and do the following changes.
- Encapsulate the clock enable into one standalone function
- Add the error propagation from host_init
- Add one new host_exit callback, used to balance the usage of the
  regulator and clocks when link never came up
- Add the compliance tests mode support

Main changes from v2 to v3:
- Add "Reviewed-by: Lucas Stach <l.stach@...gutronix.de>" tag into
  first two patches.
- Add a Fixes tag into #3 patch.
- Split the #4 of v2 to two patches, one is clock disable codes move,
  the other one is the acutal clock unbalance fix.
- Add a new host_exit() callback into dw_pcie_host_ops, then it could be
  invoked to handle the unbalance issue in the error handling after
  host_init() function when link is down.
- Add a new host_exit() callback for i.MX PCIe driver to handle this case
  in the error handling after host_init.

Main changes from v1 to v2:
Regarding Lucas' comments.
  - Move the placement of the new imx6_pcie_clk_enable() to avoid the
    forward declarition.
  - Seperate the second patch of v1 patch-set to three patches.
  - Use the module_param to replace the kernel command line.
Regarding Bjorn's comments:
  - Use the cover-letter for a multi-patch series.
  - Correct the subject line, and refine the commit logs. For example,
    remove the timestamp of the logs.

drivers/pci/controller/dwc/pci-imx6.c             | 176 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++--------------------------------
drivers/pci/controller/dwc/pcie-designware-host.c |   5 ++-
drivers/pci/controller/dwc/pcie-designware.h      |   1 +
3 files changed, 119 insertions(+), 63 deletions(-)

[PATCH v3 1/7] PCI: imx6: Encapsulate the clock enable into one
[PATCH v3 2/7] PCI: imx6: Add the error propagation from host_init
[PATCH v3 3/7] PCI: imx6: Fix the regulator dump when link never came
[PATCH v3 4/7] PCI: imx6: move the clock disable function to a proper
[PATCH v3 5/7] PCI: dwc: add a new callback host exit function into
[PATCH v3 6/7] PCI: imx6: Fix the reference handling unbalance when
[PATCH v3 7/7] PCI: imx6: Add the compliance tests mode support