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Date: Thu, 23 Apr 2020 14:40:34 +1000 Message-Id: <20200423044036.234578-1-evanbenn@chromium.org> X-Mailer: git-send-email 2.26.2.303.gf8c07b1a785-goog MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200422_214054_430491_B181DA2C X-CRM114-Status: GOOD ( 13.31 ) X-Spam-Score: -0.2 (/) X-Spam-Report: SpamAssassin version 3.4.4 on bombadil.infradead.org summary: Content analysis details: (-0.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2607:f8b0:4864:20:0:0:0:541 listed in] [list.dnswl.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain -0.0 DKIMWL_WL_HIGH DKIMwl.org - Whitelisted High sender X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Geert Uytterhoeven , Catalin Marinas , Bjorn Andersson , Leonard Crestez , Will Deacon , xingyu.chen@amlogic.com, Rob Herring , Anson Huang , Mauro Carvalho Chehab , Marcin Juszkiewicz , Evan Benn , Valentin Schneider , Guenter Roeck , devicetree@vger.kernel.org, linux-watchdog@vger.kernel.org, Rob Herring , linux-mediatek@lists.infradead.org, Matthias Brugger , Wim Van Sebroeck , linux-arm-kernel@lists.infradead.org, Greg Kroah-Hartman , Li Yang , Olof Johansson , jwerner@chromium.org, Shawn Guo , "David S. Miller" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org This is currently supported in firmware deployed on oak, hana and elm mt8173 chromebook devices. The kernel driver is written to be a generic SMC watchdog driver. Arm Trusted Firmware upstreaming review: https://review.trustedfirmware.org/c/TF-A/trusted-firmware-a/+/3405 Patch to add oak, hana, elm device tree: https://lore.kernel.org/linux-arm-kernel/20200110073730.213789-1-hsinyi@chromium.org/ I would like to add the device tree support after the above patch is accepted. Changes in v5: - Change compatible to arm,smc-wdt - Make timeleft return 0 on error - Use type punning on smc_func_id to save an alloc - Change compatible to arm,smc-wdt Changes in v4: - Add arm,smc-id property - Get smc-id from of property - Return a1 instead of a0 in timeleft Changes in v3: - Change name back to arm - Add optional get_timeleft op - change name to arm_smc_wdt Changes in v2: - Change name arm > mt8173 - use watchdog_stop_on_reboot - use watchdog_stop_on_unregister - use devm_watchdog_register_device - remove smcwd_shutdown, smcwd_remove - change error codes Evan Benn (1): dt-bindings: watchdog: Add ARM smc wdt for mt8173 watchdog Julius Werner (1): watchdog: Add new arm_smc_wdt watchdog driver .../bindings/watchdog/arm-smc-wdt.yaml | 36 ++++ MAINTAINERS | 7 + arch/arm64/configs/defconfig | 1 + drivers/watchdog/Kconfig | 13 ++ drivers/watchdog/Makefile | 1 + drivers/watchdog/arm_smc_wdt.c | 189 ++++++++++++++++++ 6 files changed, 247 insertions(+) create mode 100644 Documentation/devicetree/bindings/watchdog/arm-smc-wdt.yaml create mode 100644 drivers/watchdog/arm_smc_wdt.c