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
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2.13.6
