[PATCH 00/11] arm64: dts: renesas: Specify ethernet PHY reset timings

[Marek Vasut]

This is the same patch for various boards, details are below.
The discussion that prompted this patchset is at [0].

The KSZ9031RNX reference manual [1] DS00002096H page 60 FIGURE 7-7:
POWER-UP/POWER-DOWN/RESET TIMING Note 2 states, that after the
de-assertion of reset, wait a minimum of 100 us before starting
programming on the MIIM (MDC/MDIO) interface. Set DT property
reset-deassert-us to three times that, 300 us, to provide ample
time between reset deassertion and MDIO access.

The KSZ9031RNX reference manual [1] DS00002096H page 60 TABLE 7-7:
POWER-UP/POWER-DOWN/RESET TIMING PARAMETERS row tSR Stable supply
voltages to de-assertion of reset is at minimum 10 ms. Set DT
property reset-assert-us to 10ms because the KSZ9031RNX RM does
not explicitly spell out how long the reset has to be asserted,
but this at least covers the worst case scenario.

The Gray Hawk patch in this series depends on [2].

[0] https://lore.kernel.org/all/CAMuHMdXJvrsXitGagqZJ_STdTTh_s1cBAKf6+esihaVWjfn40g@xxxxxxxxxxxxxx/
[1] https://ww1.microchip.com/downloads/aemDocuments/documents/UNG/ProductDocuments/DataSheets/KSZ9031MNX-Data-Sheet-DS00002096.pdf
[2] https://lore.kernel.org/all/20260504225428.114959-1-marek.vasut+renesas@xxxxxxxxxxx/

Marek Vasut (11):
  arm64: dts: renesas: salvator-common: Specify ethernet PHY reset
    timings
  arm64: dts: renesas: ulcb: Specify ethernet PHY reset timings
  arm64: dts: renesas: eagle: Specify ethernet PHY reset timings
  arm64: dts: renesas: v3msk: Specify ethernet PHY reset timings
  arm64: dts: renesas: condor-common: Specify ethernet PHY reset timings
  arm64: dts: renesas: v3hsk: Specify ethernet PHY reset timings
  arm64: dts: renesas: ebisu: Specify ethernet PHY reset timings
  arm64: dts: renesas: draak: Specify ethernet PHY reset timings
  arm64: dts: renesas: falcon: Specify ethernet PHY reset timings
  arm64: dts: renesas: white-hawk: Specify ethernet PHY reset timings
  arm64: dts: renesas: gray-hawk: Specify ethernet PHY reset timings

 arch/arm64/boot/dts/renesas/condor-common.dtsi         | 2 ++
 arch/arm64/boot/dts/renesas/draak.dtsi                 | 2 ++
 arch/arm64/boot/dts/renesas/ebisu.dtsi                 | 2 ++
 arch/arm64/boot/dts/renesas/gray-hawk-single.dtsi      | 2 ++
 arch/arm64/boot/dts/renesas/r8a77970-eagle.dts         | 2 ++
 arch/arm64/boot/dts/renesas/r8a77970-v3msk.dts         | 2 ++
 arch/arm64/boot/dts/renesas/r8a77980-v3hsk.dts         | 2 ++
 arch/arm64/boot/dts/renesas/r8a779a0-falcon.dts        | 2 ++
 arch/arm64/boot/dts/renesas/salvator-common.dtsi       | 2 ++
 arch/arm64/boot/dts/renesas/ulcb.dtsi                  | 2 ++
 arch/arm64/boot/dts/renesas/white-hawk-cpu-common.dtsi | 2 ++
 11 files changed, 22 insertions(+)

---
Cc: Conor Dooley <conor+dt@xxxxxxxxxx>
Cc: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
Cc: Krzysztof Kozlowski <krzk+dt@xxxxxxxxxx>
Cc: Magnus Damm <magnus.damm@xxxxxxxxx>
Cc: Rob Herring <robh@xxxxxxxxxx>
Cc: devicetree@xxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Cc: linux-renesas-soc@xxxxxxxxxxxxxxx

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2.53.0