linux-kernel - Re: [PATCH v5 0/4] MT7621 PCIe PHY

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Message-ID: <CAMhs-H8bUuSQ+ROr4PNJXYaGFnjG2=zpjGK7UAAfoPMPbFBb1Q@mail.gmail.com>
Date:   Fri, 20 Nov 2020 17:20:32 +0100
From:   Sergio Paracuellos <sergio.paracuellos@...il.com>
To:     vkoul@...nel.org
Cc:     Rob Herring <robh+dt@...nel.org>,
        Kishon Vijay Abraham I <kishon@...com>,
        Greg KH <gregkh@...uxfoundation.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        "open list:STAGING SUBSYSTEM" <devel@...verdev.osuosl.org>,
        NeilBrown <neil@...wn.name>
Subject: Re: [PATCH v5 0/4] MT7621 PCIe PHY

Hi Vinod,

On Thu, Nov 19, 2020 at 4:43 PM Sergio Paracuellos
<sergio.paracuellos@...il.com> wrote:
>
> This series adds support for the PCIe PHY found in the Mediatek
> MT7621 SoC.
>
> There is also a 'mt7621-pci' driver which is the controller part
> which is still in staging and is a client of this phy.
>
> Both drivers have been tested together in a gnubee1 board.
>
> This series are rebased on the top of linux-next:
> commit 4e78c578cb98 ("Add linux-next specific files for 20201030")
>
> Changes in v5:
>   - PATCH 1/4: Recollect Rob's Reviewed-by of bindings.
>   - PATCH 4/4: Recollect Greg's Acked-by for removing stuff from
>     staging area.
>   - Make Vinod's review comments changes in [0]:
>     * Use FIELD_GET and FIELD_PREP apis and avoid multiple *_VAL and
>       *_SHIFT custom definitions.
>     * Remove phy-read and phy-write internal functions and directly
>       call regmap_read and regmap_write in 'mt7621_phy_rmw'.
>     * Change some traces from info to debug log level.
>     * Note that I have maintained 'mt7621_phy_rmw' instead of use
>       'regmap_update_bits'. This is because in order to get a reliable
>       boot registers must be written event the contained value in
>       that register is the same. I have preferred doing in this way
>       instead of using 'regmap_update_bits_base' passing 'false' for
>       async and 'true' for the force write. If this way of using
>       'regmap_update_bits_base' is preferred just let me know.

I notice we already have 'regmap_write_bits' function. I will use this
and avoid mt7621_phy_rmw
and send v6 of this series.

Also, do you have any preference of where you want this series to be rebased on?

Best regards,
    Sergio Paracuellos
>
> Changes in v4:
>   - Bindings moved from txt to yaml so previous Rob's Reviewed-by
>     is not in the new patch with the yaml file.
>   - 'phy-cells' property means now if phy is dual-ported.
>   - Avoid custom 'xlate' function and properly set registers
>     when the phy is dual ported.
>   - Add use of 'builtin_platform_driver'.
>   - Added a patch including myself as maintainer in the
>     MAINTAINERS file.
>   - Add a patch removing patch from staging to make easier
>     the complete inclusion and avoid possible problems might
>     appear in 'linux-next' if the series are included.
>
> Changes in v3:
>   - Recollect Rob's Reviewed-by of bindings.
>   - Make Kishon Vijay suggested changes in v2:
>    (See https://lkml.org/lkml/2019/4/17/53)
>   - Kconfig:
>     * Add depends on COMPILE_TEST
>     * Select REGMAP_MMIO
>   - Make use of 'soc_device_attribute' and 'soc_device_match'
>   - Use regmap mmio API instead of directly 'readl' and 'writel'.
>   - Use 'platform_get_resource' instead of 'of_address_to_resource'.
>
> Changes in v2:
>   - Reorder patches to get bindings first in the series.
>   - Don't use child nodes in the device tree. Use #phy-cells=1 instead.
>   - Update driver code with new 'xlate' function for the new device tree.
>   - Minor changes in driver's macros changing some spaces to tabs.
>
> Thanks in advance for your time.
>
> Best regards,
>     Sergio Paracuellos
>
> [0]: http://driverdev.linuxdriverproject.org/pipermail/driverdev-devel/2020-November/148864.html
>
> Sergio Paracuellos (4):
>   dt-bindings: phy: Add binding for Mediatek MT7621 PCIe PHY
>   phy: ralink: Add PHY driver for MT7621 PCIe PHY
>   MAINTAINERS: add MT7621 PHY PCI maintainer
>   staging: mt7621-pci-phy: remove driver from staging
>
>  .../phy}/mediatek,mt7621-pci-phy.yaml         |   0
>  MAINTAINERS                                   |   6 +
>  drivers/phy/ralink/Kconfig                    |   8 ++
>  drivers/phy/ralink/Makefile                   |   1 +
>  .../ralink/phy-mt7621-pci.c}                  | 103 +++++++-----------
>  drivers/staging/Kconfig                       |   2 -
>  drivers/staging/Makefile                      |   1 -
>  drivers/staging/mt7621-pci-phy/Kconfig        |   8 --
>  drivers/staging/mt7621-pci-phy/Makefile       |   2 -
>  drivers/staging/mt7621-pci-phy/TODO           |   4 -
>  10 files changed, 53 insertions(+), 82 deletions(-)
>  rename {drivers/staging/mt7621-pci-phy => Documentation/devicetree/bindings/phy}/mediatek,mt7621-pci-phy.yaml (100%)
>  rename drivers/{staging/mt7621-pci-phy/pci-mt7621-phy.c => phy/ralink/phy-mt7621-pci.c} (76%)
>  delete mode 100644 drivers/staging/mt7621-pci-phy/Kconfig
>  delete mode 100644 drivers/staging/mt7621-pci-phy/Makefile
>  delete mode 100644 drivers/staging/mt7621-pci-phy/TODO
>
> --
> 2.25.1
>