For devices in the RZ/G2L family, we have so far relied on U-Boot
correctly configuring the Ethernet interfaces in RGMII mode with
PVDD=1.8V before the kernel is booted. Instead, the required
configuration should be described in the device tree and activated
within the pinctrl driver.

Changes v2->v3:
  * Picked up Linus W's Acked-by tags & Geert's Reviewed-by tags.
  * Renamed rzg3s oen functions to match the callback names.
  * Check pin caps before calling oen_{read,write}() so we can drop the
    caps argument to those functions.
  * Simplify arguments to rzg{2l,3s}_pin_to_oen_bit() and decode
    required variables inside this function.
  * Check for dedicated pin before calling RZG2L_PIN_ID_TO_{PORT,PIN}()
    in rzg3s_pin_to_oen_bit().

Changes v1->v2:
  * Rebased on next-20240611.
  * Changed the approach taken in the pinctrl patches to be compatible
    with changes made by Prabhakar for RZ/V2H support. I haven't picked
    up Reviewed-by tags on these patches as they've changed a lot.
  * Clarified that patch 6/9 also affects RZ/Five.
  * No major changes to the dts patches so I've picked up Geert's
    Reviewed-by tags for these.

Paul Barker (9):
  pinctrl: renesas: rzg2l: Clarify OEN read/write support
  pinctrl: renesas: rzg2l: Clean up and refactor OEN read/write
    functions
  pinctrl: renesas: rzg2l: Support output enable on RZ/G2L
  arm64: dts: renesas: rzg2l: Enable Ethernet TXC output
  arm64: dts: renesas: rzg2lc: Enable Ethernet TXC output
  arm64: dts: renesas: rzg2ul: Enable Ethernet TXC output
  arm64: dts: renesas: rzg2l: Set Ethernet PVDD to 1.8V
  arm64: dts: renesas: rzg2lc: Set Ethernet PVDD to 1.8V
  arm64: dts: renesas: rzg2ul: Set Ethernet PVDD to 1.8V

 .../boot/dts/renesas/rzg2l-smarc-som.dtsi     |  86 ++++++----
 .../boot/dts/renesas/rzg2lc-smarc-som.dtsi    |  43 +++--
 .../boot/dts/renesas/rzg2ul-smarc-som.dtsi    |  86 ++++++----
 drivers/pinctrl/renesas/pinctrl-rzg2l.c       | 155 ++++++++++++------
 4 files changed, 237 insertions(+), 133 deletions(-)

-- 
2.39.2

On Tue, Jun 25, 2024 at 10:03 PM Paul Barker
<paul.barker.ct@bp.renesas.com> wrote:
> For devices in the RZ/G2L family, we have so far relied on U-Boot
> correctly configuring the Ethernet interfaces in RGMII mode with
> PVDD=1.8V before the kernel is booted. Instead, the required
> configuration should be described in the device tree and activated
> within the pinctrl driver.

> Paul Barker (9):
>   arm64: dts: renesas: rzg2l: Enable Ethernet TXC output
>   arm64: dts: renesas: rzg2lc: Enable Ethernet TXC output
>   arm64: dts: renesas: rzg2ul: Enable Ethernet TXC output
>   arm64: dts: renesas: rzg2l: Set Ethernet PVDD to 1.8V
>   arm64: dts: renesas: rzg2lc: Set Ethernet PVDD to 1.8V
>   arm64: dts: renesas: rzg2ul: Set Ethernet PVDD to 1.8V

Now commit 2453e858e945e5e2 ("pinctrl: renesas: rzg2l: Support output
enable on RZ/G2L")  is in v6.11-rc1, I will queue the DTS patches
in renesas-devel for v6.12.

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds