From: Sander Vanheule <sander@svanheule.net>
To: linux-watchdog@vger.kernel.org, devicetree@vger.kernel.org
Cc: Wim Van Sebroeck <wim@linux-watchdog.org>,
Guenter Roeck <linux@roeck-us.net>,
Rob Herring <robh+dt@kernel.org>,
linux-kernel@vger.kernel.org,
Sander Vanheule <sander@svanheule.net>
Subject: [PATCH v3 0/2] Add Realtek Otto WDT support
Date: Thu, 4 Nov 2021 10:32:11 +0100 [thread overview]
Message-ID: <cover.1636018117.git.sander@svanheule.net> (raw)
This watchdog timer is found on Realtek's Otto MIPS platforms, including the
RTL838x, RTL839x, and RTL930x series of ethernet switch SoCs. It has a number
of reset modes (SoC, CPU, software), and can provide pretimeout interrupts.
The timer has two timeout phases. Both phases have a maximum duration of 32
prescaled clock ticks, which is ca. 43s with a clock of 200MHz:
- Phase 1: During this phase, the WDT can be pinged to reset the timeout.
- Phase 2: Starts after phase 1 has timed out, and only serves to give the
system some time to clean up, or notify others that it's going to reset.
During this phase, pinging the WDT has no effect, and a reset is unavoidable.
The driver has been tested on a Zyxel GS1900-8 (RTL8380, mainline kernel and
OpenWrt), a Zyxel GS1900-48 (RTL8393, mainline), a Netgear GS110TPPv1
(RTL8381, mainline), and a Zyxel XGS1250-12 (RTL9203B, Openwrt).
Changes since v2:
Link: https://lore.kernel.org/all/20211104085952.13572-1-sander@svanheule.net/
- Fix off-by-one error in prescale assignment
Main changes since v1:
Link: https://lore.kernel.org/all/cover.1634131707.git.sander@svanheule.net/
- Drop implementation of phase2 irq, since it is only triggered on system reset
- Drop redundant value checks and lock
- Add RTL930x compatibility
Sander Vanheule (2):
dt-bindings: watchdog: Realtek Otto WDT binding
watchdog: Add Realtek Otto watchdog timer
.../bindings/watchdog/realtek,otto-wdt.yaml | 91 +++++
MAINTAINERS | 7 +
drivers/watchdog/Kconfig | 13 +
drivers/watchdog/Makefile | 1 +
drivers/watchdog/realtek_otto_wdt.c | 361 ++++++++++++++++++
5 files changed, 473 insertions(+)
create mode 100644 Documentation/devicetree/bindings/watchdog/realtek,otto-wdt.yaml
create mode 100644 drivers/watchdog/realtek_otto_wdt.c
--
2.31.1
next reply other threads:[~2021-11-04 9:32 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-04 9:32 Sander Vanheule [this message]
2021-11-04 9:32 ` [PATCH v3 1/2] dt-bindings: watchdog: Realtek Otto WDT binding Sander Vanheule
2021-11-17 5:21 ` Guenter Roeck
2021-11-04 9:32 ` [PATCH v3 2/2] watchdog: Add Realtek Otto watchdog timer Sander Vanheule
2021-11-17 5:20 ` Guenter Roeck
2021-11-17 7:13 ` Sander Vanheule
2021-11-17 12:42 ` Guenter Roeck
2021-11-17 12:59 ` Sander Vanheule
2021-11-18 17:15 ` Sander Vanheule
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=cover.1636018117.git.sander@svanheule.net \
--to=sander@svanheule.net \
--cc=devicetree@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-watchdog@vger.kernel.org \
--cc=linux@roeck-us.net \
--cc=robh+dt@kernel.org \
--cc=wim@linux-watchdog.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).