linux-kernel - [PATCH v3 0/9] Configure GbEth for RGMII on RZ/G2L family

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Message-Id: <20240625200316.4282-1-paul.barker.ct@bp.renesas.com>
Date: Tue, 25 Jun 2024 21:03:07 +0100
From: Paul Barker <paul.barker.ct@...renesas.com>
To: Geert Uytterhoeven <geert+renesas@...der.be>,
	Magnus Damm <magnus.damm@...il.com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Linus Walleij <linus.walleij@...aro.org>,
	Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Cc: Paul Barker <paul.barker.ct@...renesas.com>,
	linux-renesas-soc@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-gpio@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v3 0/9] Configure GbEth for RGMII on RZ/G2L family

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