linux-kernel - [PATCH v4 0/9] Add support to configure CPG block for watchdog on RZ/V2H(P) and RZ/G3E SoCs

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Message-ID: <20250210184910.161780-1-prabhakar.mahadev-lad.rj@bp.renesas.com>
Date: Mon, 10 Feb 2025 18:49:01 +0000
From: Prabhakar <prabhakar.csengg@...il.com>
To: Geert Uytterhoeven <geert+renesas@...der.be>,
	Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Wim Van Sebroeck <wim@...ux-watchdog.org>,
	Guenter Roeck <linux@...ck-us.net>,
	Magnus Damm <magnus.damm@...il.com>,
	Wolfram Sang <wsa+renesas@...g-engineering.com>
Cc: linux-renesas-soc@...r.kernel.org,
	linux-clk@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-watchdog@...r.kernel.org,
	Prabhakar <prabhakar.csengg@...il.com>,
	Biju Das <biju.das.jz@...renesas.com>,
	Fabrizio Castro <fabrizio.castro.jz@...esas.com>,
	Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: [PATCH v4 0/9] Add support to configure CPG block for watchdog on RZ/V2H(P) and RZ/G3E SoCs

From: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>

Hi All,

This patch series adds SYSCON support to configure and retrieve boot
status information from the CPG block for the RZ/V2H(P) and RZ/G3E SoCs.
Summary of Changes,

    Clock:
        Add syscon compatible support to the CPG block in bindings and
        device trees.

    Watchdog:
        Document the renesas,r9a09g057-syscon-wdt-errorrst property.
        Update the watchdog driver to fetch and report boot status via
        Error Reset Registers (CPG_ERROR_RSTm) and configure the
        CPG_ERRORRST_SEL2 register.

    Device Tree:
        -Add the syscon property to CPG nodes in R9A09G057 and R9A09G047
         SoC DTSI.
        -Add the renesas,syscon-cpg-error-rst property to WDT nodes in
         R9A09G057 and R9A09G047 SoC DTSI.

v3->v4
- Added support to configure CPG_ERRORRST_SEL2 register
- Updated commit messages

v2->v3
- Updated comment section to mention there aren't any ABI breakages with
  this patch series.

Cheers,
Prabhakar

Lad Prabhakar (9):
  dt-bindings: clock: rzv2h-cpg: Add syscon compatible for CPG
  clk: renesas: Kconfig: Select MFD_SYSCON for RZ/V2H(P) family driver
  arm64: dts: renesas: r9a09g047: Add `syscon` compatible for CPG node
  arm64: dts: renesas: r9a09g057: Add `syscon` compatible for CPG node
  dt-bindings: watchdog: renesas: Document
    `renesas,syscon-cpg-error-rst` property
  watchdog: rzv2h_wdt: Add support to retrieve the bootstatus
    information
  watchdog: rzv2h_wdt: Configure CPG_ERRORRST_SEL2 register
  arm64: dts: renesas: r9a09g057: Add `renesas,syscon-cpg-error-rst`
    property to WDT node
  arm64: dts: renesas: r9a09g047: Add `renesas,syscon-cpg-error-rst`
    property to WDT node

 .../bindings/clock/renesas,rzv2h-cpg.yaml     | 10 ++--
 .../bindings/watchdog/renesas,wdt.yaml        | 17 ++++++
 arch/arm64/boot/dts/renesas/r9a09g047.dtsi    |  5 +-
 arch/arm64/boot/dts/renesas/r9a09g057.dtsi    |  6 ++-
 drivers/clk/renesas/Kconfig                   |  1 +
 drivers/watchdog/rzv2h_wdt.c                  | 54 +++++++++++++++++++
 6 files changed, 87 insertions(+), 6 deletions(-)

-- 
2.43.0