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Mon, 06 Jul 2026 07:48:34 -0700 (PDT) Received: from taln60.nuvoton.co.il ([212.199.177.18]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-47aa0960634sm26798473f8f.26.2026.07.06.07.48.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 06 Jul 2026 07:48:33 -0700 (PDT) From: Tomer Maimon To: andrew@codeconstruct.com.au, wim@linux-watchdog.org, linux@roeck-us.net, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org Cc: openbmc@lists.ozlabs.org, linux-watchdog@vger.kernel.org, linux-doc@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, avifishman70@gmail.com, tmaimon77@gmail.com, tali.perry1@gmail.com, venture@google.com, yuenn@google.com, benjaminfair@google.com, corbet@lwn.net, skhan@linuxfoundation.org, joel@jms.id.au Subject: [PATCH v4 0/3] watchdog: npcm: Add reset status detection support Date: Mon, 6 Jul 2026 17:48:25 +0300 Message-Id: <20260706144828.3517631-1-tmaimon77@gmail.com> X-Mailer: git-send-email 2.34.1 X-Mailing-List: openbmc@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable This series documents and implements reset indication reporting for the=0D NPCM watchdog driver on NPCM7xx and NPCM8xx systems, and documents the=0D optional GCR syscon property used by that support.=0D =0D Patch 1 updates the watchdog binding to allow the optional=0D ``nuvoton,sysgcr`` property used for reset-cause reporting.=0D Patch 2 adds watchdog documentation that describes the bootstatus=0D mapping.=0D Patch 3 reads the SoC reset indication bits and maps them into the=0D existing watchdog bootstatus flags for NPCM750 and NPCM845, while=0D leaving WPCM450 unchanged.=0D =0D Addressed comments from:=0D - Conor Dooley: https://patchwork.ozlabs.org/project/openbmc/patch/20260705= 140100.1543486-2-tmaimon77@gmail.com/=0D =0D Changes since version 3:=0D - make GCR syscon-property conditional.=0D =0D Changes since version 2:=0D - reword patch 1 to explain the hardware reason for the GCR phandle and=0D why it is needed for the reset-status support, per Krzysztof's review=0D - cache NPCM750 reset status in SCRPAD2 so later watchdog probes can=0D report the same boot-time state=0D =0D Changes since version 1:=0D - Modify reset detection handle in the watchodg.=0D - reword patch 1 to use the GCR syscon-property wording from the=0D applied NPCM reset binding update and drop the optional property from=0D the binding example.=0D - reword the patch subjects and commit message bodies to match current=0D kernel dt-bindings, docs, and watchdog style. Tomer Maimon (3): dt-bindings: watchdog: npcm: add GCR syscon property docs: watchdog: npcm: Add reset status description watchdog: npcm: add bootstatus support .../watchdog/nuvoton,npcm750-wdt.yaml | 14 ++ Documentation/watchdog/index.rst | 1 + Documentation/watchdog/npcm_wdt.rst | 71 ++++++ drivers/watchdog/npcm_wdt.c | 217 +++++++++++++++++- 4 files changed, 301 insertions(+), 2 deletions(-) create mode 100644 Documentation/watchdog/npcm_wdt.rst --=20 2.34.1