From: Wolfram Sang <wsa+renesas@sang-engineering.com>
To: linux-renesas-soc@vger.kernel.org
Cc: Wolfram Sang <wsa+renesas@sang-engineering.com>,
Conor Dooley <conor+dt@kernel.org>,
devicetree@vger.kernel.org,
Geert Uytterhoeven <geert+renesas@glider.be>,
Guenter Roeck <linux@roeck-us.net>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
linux-watchdog@vger.kernel.org,
Magnus Damm <magnus.damm@gmail.com>,
Rob Herring <robh@kernel.org>,
Wim Van Sebroeck <wim@linux-watchdog.org>
Subject: [PATCH v3 0/2] watchdog: add Renesas Window Watchdog support
Date: Fri, 17 Oct 2025 12:15:47 +0200 [thread overview]
Message-ID: <20251017101549.4275-4-wsa+renesas@sang-engineering.com> (raw)
This Window Watchdog is a little peculiar because it can only be setup
once but we cannot find out if this write already happened. So,
configuration is delegated to the firmware/bootloader and the driver
will adapt to whatever is configured. The driver handles all bits
described in the datasheets. This is really all there is.
Tested on a SparrowHawk board (Renesas R-Car V4H). Based on v6.18-rc1
and build bot is already happy. Passes also binding checks and dtb
checks here.
Big picture change since v2 (details mentioned per patch):
* minor improvements to patch 2
Looking forward to comments!
Wolfram Sang (2):
dt-bindings: watchdog: Add Renesas WWDT
watchdog: renesas_wwdt: add driver
.../watchdog/renesas,rcar-gen3-wwdt.yaml | 114 ++++++++++++
drivers/watchdog/Kconfig | 8 +
drivers/watchdog/Makefile | 1 +
drivers/watchdog/renesas_wwdt.c | 163 ++++++++++++++++++
4 files changed, 286 insertions(+)
create mode 100644 Documentation/devicetree/bindings/watchdog/renesas,rcar-gen3-wwdt.yaml
create mode 100644 drivers/watchdog/renesas_wwdt.c
--
2.47.2
next reply other threads:[~2025-10-17 10:16 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-17 10:15 Wolfram Sang [this message]
2025-10-17 10:15 ` [PATCH v3 1/2] dt-bindings: watchdog: Add Renesas WWDT Wolfram Sang
2025-10-17 15:54 ` Conor Dooley
2025-10-17 10:15 ` [PATCH v3 2/2] watchdog: renesas_wwdt: add driver Wolfram Sang
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