From: Andrej Picej <andrej.picej@norik.com> To: linux-watchdog@vger.kernel.org Cc: shawnguo@kernel.org, linux@roeck-us.net, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-imx@nxp.com, festevam@gmail.com, kernel@pengutronix.de, s.hauer@pengutronix.de, wim@linux-watchdog.org, robh+dt@kernel.org Subject: [PATCH 0/3] Suspending i.MX watchdog in WAIT mode Date: Wed, 19 Oct 2022 13:17:11 +0200 [thread overview] Message-ID: <20221019111714.1953262-1-andrej.picej@norik.com> (raw) The i.MX6 watchdog can't be stopped once started. This means that special hardware suspend needs to be configured when the device enters low-power modes. Usually i.MX devices have two bits which deal with this: - WDZST bit disables the timer in "deeper" low power modes and - WDW bit disables the timer in "WAIT" mode which corresponds with Linux's "freeze" low-power mode. WDZST bit support is already in place since 1a9c5efa576e ("watchdog: imx2_wdt: disable watchdog timer during low power mode"). WDW bit is not common for all imx2-wdt supported devices, therefore use a new device-tree property "fsl,suspend-in-wait" which suspends the watchdog in "WAIT" mode. Andrej Picej (3): watchdog: imx2_wdg: suspend watchdog in WAIT mode dt-bindings: watchdog: fsl-imx: document suspend in wait mode ARM: dts: imx6ul/ull: suspend i.MX6UL watchdog in wait mode .../devicetree/bindings/watchdog/fsl-imx-wdt.yaml | 5 +++++ arch/arm/boot/dts/imx6ul-phytec-phycore-som.dtsi | 4 ++++ drivers/watchdog/imx2_wdt.c | 7 +++++++ 3 files changed, 16 insertions(+) -- 2.25.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
WARNING: multiple messages have this Message-ID (diff)
From: Andrej Picej <andrej.picej@norik.com> To: linux-watchdog@vger.kernel.org Cc: shawnguo@kernel.org, linux@roeck-us.net, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-imx@nxp.com, festevam@gmail.com, kernel@pengutronix.de, s.hauer@pengutronix.de, wim@linux-watchdog.org, robh+dt@kernel.org Subject: [PATCH 0/3] Suspending i.MX watchdog in WAIT mode Date: Wed, 19 Oct 2022 13:17:11 +0200 [thread overview] Message-ID: <20221019111714.1953262-1-andrej.picej@norik.com> (raw) The i.MX6 watchdog can't be stopped once started. This means that special hardware suspend needs to be configured when the device enters low-power modes. Usually i.MX devices have two bits which deal with this: - WDZST bit disables the timer in "deeper" low power modes and - WDW bit disables the timer in "WAIT" mode which corresponds with Linux's "freeze" low-power mode. WDZST bit support is already in place since 1a9c5efa576e ("watchdog: imx2_wdt: disable watchdog timer during low power mode"). WDW bit is not common for all imx2-wdt supported devices, therefore use a new device-tree property "fsl,suspend-in-wait" which suspends the watchdog in "WAIT" mode. Andrej Picej (3): watchdog: imx2_wdg: suspend watchdog in WAIT mode dt-bindings: watchdog: fsl-imx: document suspend in wait mode ARM: dts: imx6ul/ull: suspend i.MX6UL watchdog in wait mode .../devicetree/bindings/watchdog/fsl-imx-wdt.yaml | 5 +++++ arch/arm/boot/dts/imx6ul-phytec-phycore-som.dtsi | 4 ++++ drivers/watchdog/imx2_wdt.c | 7 +++++++ 3 files changed, 16 insertions(+) -- 2.25.1
next reply other threads:[~2022-10-19 11:18 UTC|newest] Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-10-19 11:17 Andrej Picej [this message] 2022-10-19 11:17 ` [PATCH 0/3] Suspending i.MX watchdog in WAIT mode Andrej Picej 2022-10-19 11:17 ` [PATCH 1/3] watchdog: imx2_wdg: suspend " Andrej Picej 2022-10-19 11:17 ` Andrej Picej 2022-10-19 15:33 ` Guenter Roeck 2022-10-19 15:33 ` Guenter Roeck 2022-10-20 6:02 ` Andrej Picej 2022-10-20 6:02 ` Andrej Picej 2022-10-19 11:17 ` [PATCH 2/3] dt-bindings: watchdog: fsl-imx: document suspend in wait mode Andrej Picej 2022-10-19 11:17 ` Andrej Picej 2022-10-19 13:00 ` Alexander Stein 2022-10-19 13:00 ` Alexander Stein 2022-10-19 15:51 ` Krzysztof Kozlowski 2022-10-19 15:51 ` Krzysztof Kozlowski 2022-10-20 6:23 ` Andrej Picej 2022-10-20 6:23 ` Andrej Picej 2022-10-20 12:18 ` Krzysztof Kozlowski 2022-10-20 12:18 ` Krzysztof Kozlowski 2022-10-20 12:36 ` Andrej Picej 2022-10-20 12:36 ` Andrej Picej 2022-10-20 12:41 ` Alexander Stein 2022-10-20 12:41 ` Alexander Stein 2022-10-20 13:05 ` Andrej Picej 2022-10-20 13:05 ` Andrej Picej 2022-10-20 18:23 ` Krzysztof Kozlowski 2022-10-20 18:23 ` Krzysztof Kozlowski 2022-10-21 5:56 ` Andrej Picej 2022-10-21 5:56 ` Andrej Picej 2022-10-21 12:58 ` Krzysztof Kozlowski 2022-10-19 11:17 ` [PATCH 3/3] ARM: dts: imx6ul/ull: suspend i.MX6UL watchdog " Andrej Picej 2022-10-19 11:17 ` Andrej Picej 2022-10-19 12:16 ` [PATCH 0/3] Suspending i.MX watchdog in WAIT mode Fabio Estevam 2022-10-19 12:16 ` Fabio Estevam 2022-10-19 15:30 ` Guenter Roeck 2022-10-19 15:30 ` Guenter Roeck 2022-10-20 5:21 ` Andrej Picej 2022-10-20 5:21 ` Andrej Picej 2022-10-19 15:46 ` Krzysztof Kozlowski 2022-10-19 15:46 ` Krzysztof Kozlowski 2022-10-20 5:49 ` Andrej Picej 2022-10-20 5:49 ` Andrej Picej 2022-10-20 12:04 ` Krzysztof Kozlowski 2022-10-20 12:04 ` Krzysztof Kozlowski 2022-10-20 12:16 ` Andrej Picej 2022-10-20 12:16 ` Andrej Picej
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=20221019111714.1953262-1-andrej.picej@norik.com \ --to=andrej.picej@norik.com \ --cc=devicetree@vger.kernel.org \ --cc=festevam@gmail.com \ --cc=kernel@pengutronix.de \ --cc=linux-arm-kernel@lists.infradead.org \ --cc=linux-imx@nxp.com \ --cc=linux-kernel@vger.kernel.org \ --cc=linux-watchdog@vger.kernel.org \ --cc=linux@roeck-us.net \ --cc=robh+dt@kernel.org \ --cc=s.hauer@pengutronix.de \ --cc=shawnguo@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: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes, see mirroring instructions on how to clone and mirror all data and code used by this external index.