linux-kernel - Re: [PATCH v4 0/8] add the imx8m pcie phy driver and imx8mm pcie support

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Message-ID: <CAJ+vNU3mmv=-19U39dKovAV1zWVPHWZxweDAvhEkW_wSQH1ikA@mail.gmail.com>
Date:   Thu, 28 Oct 2021 11:17:14 -0700
From:   Tim Harvey <tharvey@...eworks.com>
To:     Richard Zhu <hongxing.zhu@....com>
Cc:     Lucas Stach <l.stach@...gutronix.de>,
        Marcel Ziswiler <marcel.ziswiler@...adex.com>,
        Kishon Vijay Abraham I <kishon@...com>, vkoul@...nel.org,
        Rob Herring <robh@...nel.org>, galak@...nel.crashing.org,
        Shawn Guo <shawnguo@...nel.org>, linux-phy@...ts.infradead.org,
        Device Tree Mailing List <devicetree@...r.kernel.org>,
        Linux ARM Mailing List <linux-arm-kernel@...ts.infradead.org>,
        open list <linux-kernel@...r.kernel.org>,
        Sascha Hauer <kernel@...gutronix.de>,
        NXP Linux Team <linux-imx@....com>
Subject: Re: [PATCH v4 0/8] add the imx8m pcie phy driver and imx8mm pcie support

On Thu, Oct 28, 2021 at 12:52 AM Richard Zhu <hongxing.zhu@....com> 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.
>
> [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 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 |  95 +++++++++++++++++++++++++++++++++
> arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi                |  55 +++++++++++++++++++
> arch/arm64/boot/dts/freescale/imx8mm.dtsi                    |  46 +++++++++++++++-
> drivers/pci/controller/dwc/pci-imx6.c                        |  73 ++++++++++++++++++++++---
> drivers/phy/freescale/Kconfig                                |   9 ++++
> drivers/phy/freescale/Makefile                               |   1 +
> drivers/phy/freescale/phy-fsl-imx8m-pcie.c                   | 234 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> include/dt-bindings/phy/phy-imx8-pcie.h                      |  14 +++++
> 9 files changed, 525 insertions(+), 8 deletions(-)
>
> [PATCH v4 1/8] dt-bindings: phy: phy-imx8-pcie: Add binding for the
> [PATCH v4 2/8] dt-bindings: phy: Add imx8 pcie phy driver support
> [PATCH v4 3/8] dt-bindings: imx6q-pcie: Add PHY phandles and name
> [PATCH v4 4/8] arm64: dts: imx8mm: Add the pcie phy support
> [PATCH v4 5/8] phy: freescale: pcie: Initialize the imx8 pcie
> [PATCH v4 6/8] arm64: dts: imx8mm: Add the pcie support
> [PATCH v4 7/8] arm64: dts: imx8mm-evk: Add the pcie support on imx8mm
> [PATCH v4 8/8] PCI: imx: Add the imx8mm pcie support

Richard,

For your v4 series:

Reviewed-By: Tim Harvey <tharvey@...eworks.com>
Tested-By: Tim Harvey <tharvey@...eworks.com>

I tested this on imx8mm-venice* boards with no CLKREQ# support as well
as an imx8mm-evk board.

Thanks again for your effort on this series!

Best regards,

Tim