Date:   Thu, 13 Jan 2022 08:07:11 +0000
From:   Marcel Ziswiler <marcel.ziswiler@...adex.com>
To:     "kishon@...com" <kishon@...com>,
        "vkoul@...nel.org" <vkoul@...nel.org>,
        "lorenzo.pieralisi@....com" <lorenzo.pieralisi@....com>,
        "l.stach@...gutronix.de" <l.stach@...gutronix.de>,
        "tharvey@...eworks.com" <tharvey@...eworks.com>,
        "robh@...nel.org" <robh@...nel.org>,
        "galak@...nel.crashing.org" <galak@...nel.crashing.org>,
        "hongxing.zhu@....com" <hongxing.zhu@....com>,
        "bhelgaas@...gle.com" <bhelgaas@...gle.com>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>
CC:     "linux-phy@...ts.infradead.org" <linux-phy@...ts.infradead.org>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "kernel@...gutronix.de" <kernel@...gutronix.de>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-imx@....com" <linux-imx@....com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v7 0/8] Add the imx8m pcie phy driver and imx8mm pcie
 support

Hi Richard

On Thu, 2021-12-02 at 16:02 +0800, Richard Zhu wrote:
> Refer to the discussion [1] when try to enable i.MX8MM PCIe support,
> one standalone PCIe PHY driver should be seperated from i.MX PCIe
> driver when enable i.MX8MM PCIe support.
> 
> This patch-set adds the standalone PCIe PHY driver suport[1-5], and i.MX8MM
> PCIe support[6-8] to have whole view to review this patch-set.
> 
> The PCIe works on i.MX8MM EVK board based the the blkctrl power driver
> [2] and this patch-set. And tested by Tim and Marcel on the different
> reference clock modes boards.
> 
> [1] https://patchwork.ozlabs.org/project/linux-pci/patch/20210510141509.929120-3-l.stach@pengutronix.de/
> [2]
> https://patchwork.kernel.org/project/linux-arm-kernel/cover/20210910202640.980366-1-l.stach@pengutronix.de/
> 
> Main changes v6 --> v7:
> - Add "Reviewed-by: Rob Herring <robh@...nel.org>" into #2 patches.
> - Regarding Vinod's review comments do the following changes.
>   - Don't build in the PHY driver in default.
>   - Remove the extra blank line
>   - Correct the license tag.
> 
> Main changes v5 --> v6:
> - Add "Reviewed-by: Rob Herring <robh@...nel.org>" into #1 and #3 patches.
> - Merge Rob's review comments to the #2 patch.
> 
> Main changes v4 --> v5:
> - Set the AUX_EN always 1b'1, thus it can fix the regression introduced in v4
>   series on Marcel's board.
> - Use the lower-case letter in the devicetreee refer to Marcel's comments.
> - Since the default value of the deemphasis parameters are zero, only set
>   the deemphasis registers when the input paramters are none zero.
> 
> Main changes v3 --> v4:
> - Update the yaml to fix syntax error, add maxitems and drop description of phy
> - Correct the clock name in PHY DT node.
> - Squash the EVK board relalted dts changes into one patch, and drop the
>   useless dummy clock and gpio suffix in DT nodes.
> - Add board specific de-emphasis parameters as DT properties. Thus each board
>   can specify its actual de-emphasis values.
> - Update the commit log of PHY driver.
> - Remove the useless codes from PCIe driver, since they are moved to PHY driver
> - After the discussion and verification of the CLKREQ# configurations with Tim,
>   agree to add an optional boolean property "fsl,clkreq-unsupported", indicates
>   the CLKREQ# signal is hooked or not in HW designs.
> - Add "Tested-by: Marcel Ziswiler <marcel.ziswiler@...adex.com>" tag, since
>   Marcel help to test the v3 patch-set.
> 
> Main changes v2 --> v3:
> - Regarding Lucas' comments.
>  - to have a whole view to review the patches, send out the i.MX8MM PCIe support too.
>  - move the PHY related bits manipulations of the GPR/SRC to standalone PHY driver.
>  - split the dts changes to SOC and board DT, and use the enum instead of raw value.
>  - update the license of the dt-binding header file.
> 
> Changes v1 --> v2:
> - Update the license of the dt-binding header file to make the license
>   compatible with dts files.
> - Fix the dt_binding_check errors.
> 
> Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml    |   6 +++
> Documentation/devicetree/bindings/phy/fsl,imx8-pcie-phy.yaml |  92 +++++++++++++++++++++++++++++++
> arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi                |  55 +++++++++++++++++++
> arch/arm64/boot/dts/freescale/imx8mm.dtsi                    |  46 +++++++++++++++-
> drivers/pci/controller/dwc/pci-imx6.c                        |  83 +++++++++++++++++++++++++---
> drivers/phy/freescale/Kconfig                                |   8 +++
> drivers/phy/freescale/Makefile                               |   1 +
> drivers/phy/freescale/phy-fsl-imx8m-pcie.c                   | 236
> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> include/dt-bindings/phy/phy-imx8-pcie.h                      |  14 +++++
> 9 files changed, 532 insertions(+), 9 deletions(-)
> 
> [PATCH v7 1/8] dt-bindings: phy: phy-imx8-pcie: Add binding for the
> [PATCH v7 2/8] dt-bindings: phy: Add imx8 pcie phy driver support
> [PATCH v7 3/8] dt-bindings: imx6q-pcie: Add PHY phandles and name
> [PATCH v7 4/8] arm64: dts: imx8mm: Add the pcie phy support
> [PATCH v7 5/8] phy: freescale: pcie: Initialize the imx8 pcie
> [PATCH v7 6/8] arm64: dts: imx8mm: Add the pcie support
> [PATCH v7 7/8] arm64: dts: imx8mm-evk: Add the pcie support on imx8mm
> [PATCH v7 8/8] PCI: imx: Add the imx8mm pcie support

What is the status of patches 4, 6 and 7? While the rest has been pulled those are still missing in today's -
next.

Cheers

Marcel

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