Date:   Tue, 31 Oct 2017 09:19:07 +0100
From:   Corentin Labbe <clabbe.montjoie@...il.com>
To:     robh+dt@...nel.org, mark.rutland@....com,
        maxime.ripard@...e-electrons.com, wens@...e.org,
        linux@...linux.org.uk, catalin.marinas@....com, will.deacon@....com
Cc:     netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Corentin Labbe <clabbe.montjoie@...il.com>
Subject: [PATCH v10 0/8] net: stmmac: dwmac-sun8i: Handle integrated PHY

Hello

The current way to find if the PHY is internal is to compare DT phy-mode
and emac_variant/internal_phy.
But it will negate a possible future SoC where an external PHY use the
same phy mode than the integrated one.

This patchs series adds a new way to handle this problem via a mdio-mux.

The first try was to create a new MDIO mux "mdio-mux-syscon".
mdio-mux-syscon working the same way than mdio-mux-mmioreg with the exception
that the register is used via syscon/regmap.
But this solution does not work for two reason:
- changing the MDIO selection need the reset of MAC which cannot be done by the
        mdio-mux-syscon driver
- There were driver loading order problem:
        - mdio-mux-syscon needing that stmmac register the parent MDIO
        - stmmac needing that child MDIO was registered just after registering parent MDIO

So we cannot use any external MDIO-mux.

The final solution was to represent the mdio-mux in MAC node and let the MAC handle all things.

Since DT bits was reverted in 4.13, this patch series include the revert of the revert.

I have let patch splited for easy review. (for seeing what's new)
But the final serie could have some patch squashed if someone want.
Like squashing patch and 1 and 2 (documentation)

All patchs should go via the sunxi tree

Regards

Changes since v9:
- added a line before mdio-parent-bus
- removed mdio-mux compatible from doc
- fix arm prefix uppercase
- splitted changes between A64 and H5
- removed already merge patchs for net

Changes since v8:
- added reference to mdio-mux.txt in documentation
- removed compatible mdio-mux
- added mdio-parent-bus

Changes since v7:
- moved mdio-mux ouf of mdio as asked by Andrew Lunn
- reordered patchs order

Changes since v6:
- renamed external mdio to "external_mdio"
- added compatible to mdio-mux and internal-mdio
- removed usage of phy-is-integrated
- renamed do_not_scan to compatible_muxes (patch 10)
- patch 8 9 of v6 are squashed

Changes since v5:
- reordered patch 1 and 2
- mdio-mux node is now a mdio's child
- added patch 11 for removing unnecessary scan of mdio-mux

Changes since v4:
- Update documentation for new bindings
- Added 4 patchs for bring back reverted stuff of 4.13
- dwmac-sun8i now handle mdio-mux
- MDIO use now compatible = "snps,dwmac-mdio";

Changes since v3:
- Added a patch for handling fixed-link
- Updated documentation

Changes since v2:
- Add a MDIO mux for creating distinction between integrated and external MDIO.
- phy-is-integrated is not set in dtsi.

Changes since v1:
- Dropped phy-is-integrated documentation patch since another same patch was already merged
- Moved phy-is-integrated from SoC dtsi to final board DT.

Corentin Labbe (8):
  dt-bindings: net: Restore sun8i dwmac binding
  dt-bindings: net: dwmac-sun8i: update documentation about integrated
    PHY
  arm: dts: sunxi: h3/h5: Restore EMAC changes
  ARM: dts: sunxi: h3/h5: represent the mdio switch used by
    sun8i-h3-emac
  ARM: dts: sunxi: Restore EMAC changes (boards)
  arm64: dts: allwinner: A64: Restore EMAC changes
  arm64: dts: allwinner: H5: Restore EMAC changes
  arm64: dts: allwinner: add snps,dwmac-mdio compatible to emac/mdio

 .../devicetree/bindings/net/dwmac-sun8i.txt        | 207 +++++++++++++++++++++
 arch/arm/boot/dts/sun8i-h2-plus-orangepi-zero.dts  |   9 +
 arch/arm/boot/dts/sun8i-h3-bananapi-m2-plus.dts    |  19 ++
 arch/arm/boot/dts/sun8i-h3-nanopi-m1-plus.dts      |  19 ++
 arch/arm/boot/dts/sun8i-h3-nanopi-neo.dts          |   7 +
 arch/arm/boot/dts/sun8i-h3-orangepi-2.dts          |   8 +
 arch/arm/boot/dts/sun8i-h3-orangepi-one.dts        |   8 +
 arch/arm/boot/dts/sun8i-h3-orangepi-pc-plus.dts    |   5 +
 arch/arm/boot/dts/sun8i-h3-orangepi-pc.dts         |   8 +
 arch/arm/boot/dts/sun8i-h3-orangepi-plus.dts       |  22 +++
 arch/arm/boot/dts/sun8i-h3-orangepi-plus2e.dts     |  16 ++
 arch/arm/boot/dts/sunxi-h3-h5.dtsi                 |  49 +++++
 .../boot/dts/allwinner/sun50i-a64-bananapi-m64.dts |  16 ++
 .../boot/dts/allwinner/sun50i-a64-pine64-plus.dts  |  15 ++
 .../arm64/boot/dts/allwinner/sun50i-a64-pine64.dts |  17 ++
 .../dts/allwinner/sun50i-a64-sopine-baseboard.dts  |  16 ++
 arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi      |  21 +++
 .../boot/dts/allwinner/sun50i-h5-nanopi-neo2.dts   |  17 ++
 .../boot/dts/allwinner/sun50i-h5-orangepi-pc2.dts  |  17 ++
 .../dts/allwinner/sun50i-h5-orangepi-prime.dts     |  17 ++
 20 files changed, 513 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/net/dwmac-sun8i.txt

-- 
2.13.6

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