From patchwork Mon Aug 28 14:13:39 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Fabio Estevam X-Patchwork-Id: 718099 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3E2D5C83F16 for ; Mon, 28 Aug 2023 14:15:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229730AbjH1OO3 (ORCPT ); Mon, 28 Aug 2023 10:14:29 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47652 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231726AbjH1OOO (ORCPT ); Mon, 28 Aug 2023 10:14:14 -0400 Received: from mail-ot1-x32c.google.com (mail-ot1-x32c.google.com [IPv6:2607:f8b0:4864:20::32c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 400E5E7; Mon, 28 Aug 2023 07:14:12 -0700 (PDT) Received: by mail-ot1-x32c.google.com with SMTP id 46e09a7af769-6bb1133b063so305804a34.1; Mon, 28 Aug 2023 07:14:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1693232051; x=1693836851; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=ZvuJ7yib7Qh1rYSqHXrFs3LlKgRFn22xpMnqYQXncj0=; b=kaxEAx9Jr8UhC4FGucZ/Q+huBydS0on8NPs+X+Qpl+6zCPi4G9/YUNNr1U9lx3Ekj1 CFr5lLSbmY0nrN1Ppvl1xyjLkfW76ZVQG4xslOwX/fP2leZKxIIZgrs6Iz4aKILSLruV nOlbL1DIjr30wtVQZTtN2XtO51iHH3/GJMgoFDPx7tRsR/MOOX57yi+5XY6CLqSYMZDE YR08ZeA1gOaRzfbghLdmbaYVFTkD3yRe4kjXIhHVQLwbZ2VsSC1/Py1Zs1G86znbnPUX mn/fV6r8jBySjkE8I7ZZqZczzpP1qi6o0xHL5k3sG8YrSrfIBvwRDsLtQn/z09bLO7b4 kHqQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1693232051; x=1693836851; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=ZvuJ7yib7Qh1rYSqHXrFs3LlKgRFn22xpMnqYQXncj0=; b=QeNbHDl35SAB2TT8Rs7/tlIMo1YWFK9pB5Zq1f9/SkBri6jMIor9deo5qh4m8BI/R1 m0cR/VQ6/hD2fXbo5m7yVTGWnegbXxSoDdeCUYVYU8bfS+9olXtfj1yjpY4lUS6YIJKb KYDX8M/nVCV7ZGAgb/XB9uR2JtzL0K6P5WEZSN8Q+0+pgyi2O6uXMjxCiuAIi0Yz9KAL rKnbU6hRKaQxUwZUX8gh6cDSD05F93mFT3Zv/oSpGjGPSHKLLAC/krRNoYuSGa2nkraZ IF06Kd1zGXZ6vwvrma/3MTTVDhqw06du5rhXVIO/uwd8aFfh9V1G1+sAXFLz8HckQ63X 1+0Q== X-Gm-Message-State: AOJu0YwOC4u/F4lz9cG4xa4CB3+fpqgqyljAWalQXGNLawMBKdIKpzeK ciPY3HXzfAagoHQAB6c/sJM= X-Google-Smtp-Source: AGHT+IGyt6y+8UNi0DgJdFIXSkntcmLgkDt8y6eEpJ/UBkCDo5G6KK1/fb7qGK0oj0lnXYnqnCzNcQ== X-Received: by 2002:a05:6871:809:b0:1bb:81a1:f44e with SMTP id q9-20020a056871080900b001bb81a1f44emr28734735oap.3.1693232051435; Mon, 28 Aug 2023 07:14:11 -0700 (PDT) Received: from fabio-Precision-3551.. ([2804:14c:485:4b61:3c37:a69d:a4cd:94fc]) by smtp.gmail.com with ESMTPSA id l5-20020a056870e90500b001c4ede43955sm4323892oan.31.2023.08.28.07.14.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 28 Aug 2023 07:14:10 -0700 (PDT) From: Fabio Estevam To: daniel.lezcano@linaro.org Cc: rafael@kernel.org, amitk@kernel.org, rui.zhang@intel.com, linux-pm@vger.kernel.org, krzysztof.kozlowski+dt@linaro.org, robh+dt@kernel.org, conor+dt@kernel.org, devicetree@vger.kernel.org, Fabio Estevam Subject: [PATCH v2 1/3] dt-bindings: thermal-zones: Document critical-action Date: Mon, 28 Aug 2023 11:13:39 -0300 Message-Id: <20230828141341.1583591-1-festevam@gmail.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org From: Fabio Estevam Document the critical-action property to describe the thermal action that will be taken after the critical temperature is reached. The possible values are "shutdown" and "reboot". Signed-off-by: Fabio Estevam --- Changes since v1: - Make 'critical-action' to be of string type. .../devicetree/bindings/thermal/thermal-zones.yaml | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/Documentation/devicetree/bindings/thermal/thermal-zones.yaml b/Documentation/devicetree/bindings/thermal/thermal-zones.yaml index 4f3acdc4dec0..a01456356d9f 100644 --- a/Documentation/devicetree/bindings/thermal/thermal-zones.yaml +++ b/Documentation/devicetree/bindings/thermal/thermal-zones.yaml @@ -75,6 +75,16 @@ patternProperties: framework and assumes that the thermal sensors in this zone support interrupts. + critical-action: + $ref: /schemas/types.yaml#/definitions/string + description: + The action that happens after the critical temperature is reached. + Possible values are "shutdown" and "reboot". + + enum: + - shutdown # Trigger a shutdown after the critical temperature is reached + - reboot # Trigger a reboot after the critical temperature is reached + thermal-sensors: $ref: /schemas/types.yaml#/definitions/phandle-array maxItems: 1 From patchwork Mon Aug 28 14:13:40 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Fabio Estevam X-Patchwork-Id: 718523 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A3E08C83F19 for ; Mon, 28 Aug 2023 14:15:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231569AbjH1OOb (ORCPT ); Mon, 28 Aug 2023 10:14:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47680 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231741AbjH1OOT (ORCPT ); Mon, 28 Aug 2023 10:14:19 -0400 Received: from mail-oa1-x2f.google.com (mail-oa1-x2f.google.com [IPv6:2001:4860:4864:20::2f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E0DD0E7; Mon, 28 Aug 2023 07:14:15 -0700 (PDT) Received: by mail-oa1-x2f.google.com with SMTP id 586e51a60fabf-1c134602a55so651791fac.1; Mon, 28 Aug 2023 07:14:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1693232055; x=1693836855; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=h/y/OzGht6uESn/2y+kml2L9EOpmzM5vaL1ZN2yoFwo=; b=jw3RgLfCpPX5dRMkXX5b4sSdkK4s5HaEZfTlQmSGfzASFHDCkKp8x29FB4oS6HXMGl jE1TAUt723+APcpkVlCFDxss3qEbS7gsgCPHOUDXkqj108kn0kH+6QZLFEgCPcKpOPF6 ilAnaFbzbYUnzORaKvfsroGwXSLZO0qGrso4fEWWn8gCAsZYnmzPpeR2tDT/P7ybgnBL +liHIlxAh+g8u7jfZu6ugAiu8k/aPM0crVNzIblOwX3NIEJystRJtEwORY34L+WAD52D Ykpei2+AWbxX9m3pTYxXUtANtjXTThigZ0ZVJlWS0uRn28s3mLviVA8Z6p4FhA4ymFNu 4lwA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1693232055; x=1693836855; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=h/y/OzGht6uESn/2y+kml2L9EOpmzM5vaL1ZN2yoFwo=; b=Rv1Tsf9FQRpOdcsSxSDgW+7VtTpoArLr104hOn7gGuonVpG1UfDE1rmYBfseFGUw5M O+wZvNxDzDIdryLO77NdohFmcMoM8cRDTRFNQvBOKUOkxg6ri6zHlPTVBfH2szmVsDuV y1lNmAWGZWcqb3rld1eaQvXhOPNIgzaMoBcpaRxzzHVz03iUP9MsdFhIZ04BqD+PRiQd v1WVd0aQBwMoSD/xlUmkfaeFCzfqP3PvMOCFdw+TNQixuhX61tueJO8cOy+p07K0wmsN jvqxxcVdKNbkk8fezRtWtMX0wvykQg9Wy7CvQ+ceXg5RZnMjliENKH0l5xl1HGI+KOQ8 NZLQ== X-Gm-Message-State: AOJu0YyvrPZccyS61OHM9igH7516j6ynBRl1q/K5JKVxq6V3n+NKmdtC DTVS1h0imXF/3Uf6vWeN+UM= X-Google-Smtp-Source: AGHT+IHglFtV417hZYXfWoZR1GwzLic9Cb8ps9koJ0Sivvi9nfcZM6uCmgTI7wh1uyvxSNxZlK+4vg== X-Received: by 2002:a05:6870:6124:b0:1b7:5e47:5b75 with SMTP id s36-20020a056870612400b001b75e475b75mr28734986oae.4.1693232055060; Mon, 28 Aug 2023 07:14:15 -0700 (PDT) Received: from fabio-Precision-3551.. ([2804:14c:485:4b61:3c37:a69d:a4cd:94fc]) by smtp.gmail.com with ESMTPSA id l5-20020a056870e90500b001c4ede43955sm4323892oan.31.2023.08.28.07.14.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 28 Aug 2023 07:14:14 -0700 (PDT) From: Fabio Estevam To: daniel.lezcano@linaro.org Cc: rafael@kernel.org, amitk@kernel.org, rui.zhang@intel.com, linux-pm@vger.kernel.org, krzysztof.kozlowski+dt@linaro.org, robh+dt@kernel.org, conor+dt@kernel.org, devicetree@vger.kernel.org, Fabio Estevam Subject: [PATCH v2 2/3] reboot: Introduce hw_protection_reboot() Date: Mon, 28 Aug 2023 11:13:40 -0300 Message-Id: <20230828141341.1583591-2-festevam@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230828141341.1583591-1-festevam@gmail.com> References: <20230828141341.1583591-1-festevam@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org From: Fabio Estevam Introduce hw_protection_reboot() to trigger an emergency reboot. It is a counterpart of hw_protection_shutdown() with the difference that it will force a reboot instead of shutdown. The motivation for doing this is to allow the thermal subystem to trigger a reboot when the temperature reaches the critical temperature. Signed-off-by: Fabio Estevam --- Changes since v1: - None include/linux/reboot.h | 1 + kernel/reboot.c | 34 ++++++++++++++++++++++++++++++++++ 2 files changed, 35 insertions(+) diff --git a/include/linux/reboot.h b/include/linux/reboot.h index 2b6bb593be5b..4a319bc24f6a 100644 --- a/include/linux/reboot.h +++ b/include/linux/reboot.h @@ -174,6 +174,7 @@ void ctrl_alt_del(void); extern void orderly_poweroff(bool force); extern void orderly_reboot(void); +void hw_protection_reboot(const char *reason, int ms_until_forced); void hw_protection_shutdown(const char *reason, int ms_until_forced); /* diff --git a/kernel/reboot.c b/kernel/reboot.c index 3bba88c7ffc6..05333ae8bc6b 100644 --- a/kernel/reboot.c +++ b/kernel/reboot.c @@ -952,6 +952,40 @@ static void hw_failure_emergency_poweroff(int poweroff_delay_ms) msecs_to_jiffies(poweroff_delay_ms)); } +/** + * hw_protection_reboot - Trigger an emergency system reboot + * + * @reason: Reason of emergency reboot to be printed. + * @ms_until_forced: Time to wait for orderly reboot before tiggering a + * forced reboot. Negative value disables the forced + * reboot. + * + * Initiate an emergency system reboot in order to protect hardware from + * further damage. Usage examples include a thermal protection. + * + * NOTE: The request is ignored if protection reboot is already pending even + * if the previous request has given a large timeout for forced reboot. + * Can be called from any context. + */ +void hw_protection_reboot(const char *reason, int ms_until_forced) +{ + static atomic_t allow_proceed = ATOMIC_INIT(1); + + pr_emerg("HARDWARE PROTECTION reboot (%s)\n", reason); + + /* Reboot should be initiated only once. */ + if (!atomic_dec_and_test(&allow_proceed)) + return; + + /* + * Queue a backup emergency reboot in the event of + * orderly_reboot failure + */ + hw_failure_emergency_poweroff(ms_until_forced); + orderly_reboot(); +} +EXPORT_SYMBOL_GPL(hw_protection_reboot); + /** * hw_protection_shutdown - Trigger an emergency system poweroff * From patchwork Mon Aug 28 14:13:41 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Fabio Estevam X-Patchwork-Id: 718524 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 64EC1C83F18 for ; Mon, 28 Aug 2023 14:15:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231588AbjH1OOb (ORCPT ); Mon, 28 Aug 2023 10:14:31 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60212 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231744AbjH1OOW (ORCPT ); Mon, 28 Aug 2023 10:14:22 -0400 Received: from mail-oa1-x35.google.com (mail-oa1-x35.google.com [IPv6:2001:4860:4864:20::35]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 73695E7; Mon, 28 Aug 2023 07:14:19 -0700 (PDT) Received: by mail-oa1-x35.google.com with SMTP id 586e51a60fabf-1d0b00d68c7so120628fac.0; Mon, 28 Aug 2023 07:14:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1693232058; x=1693836858; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=vRGlx8xWsboOHpufKI6wY/4OuATN1MLCGFA2VszRVGU=; b=PqgW8RpvkpLrUQiws7TMN56R66jc6o3nmo1EhWd/EAqbFl19Zl0eJhFGYtW2obS9iC QrHOKjneeHH95LO+3UsDAIvWXYT1W9cImyZ8Jjfhs7kk/U4SxCogptdLEZhmhU3ZOsI2 mmXboR1xSz2q7KUEin1lc+aKrq5y8UzwIa6TBvlI2Z9Zu0pBaMrcSUuHnMc9g1WebUU+ /3cQAZw9xeHl/4iG/ALzdGZaHFfb9iXvVfP5/BhQ4o4FURnM0RiYw+4RVF4OO1wBYEGW 9FRCFr9dnpyHbxL/qG9KKJ++u8n1/TSIxW0itpvp3mZSh+ePjN/HH0giqUWAWC3FJt1Q vUJQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1693232058; x=1693836858; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=vRGlx8xWsboOHpufKI6wY/4OuATN1MLCGFA2VszRVGU=; b=OE+Mo9YUFNGET0XhDQrR6sy5Yu16FoZrLMh/8w0bR+P1OxUZPHsZPiIMZyWwBIuGrt nMQyA0HoWGXTESc1ud7Wcb9xNwr/v2NtdYO+omWpumlHLSEJ7CrAmL4ia7CHagBSvD/g lWbTW8dHqDh+f1K9wet4qAnVtozF4EFZvRn6fSH68oNtDIkuVNdthNUWHzLPixPytt1b LNi7EH+xE2IKa7TDdZ1uuJO1+1tNSaotgr40m0opH/UYedlgkVghDyLklbUr7wlur+sw 7GMOZRTzv3za7z2+QKJXziD9qQKPXjIoRlnfORQ2rHSmRnuRpL2mOm0ic1K9iW9TRWU7 pi6w== X-Gm-Message-State: AOJu0YxEPu2YhD2X7Bedn9dpe7LHplC/w7MSOytGGZPI7kI2CoiqMieN mJZuhmKQpmfrgWNmyVtzvqU= X-Google-Smtp-Source: AGHT+IGsJapNBbY7F7ja/6NfrS2C7BeWFYmKBy7J34p3kgFOHor0KWNPutN2xN3Vnr4vEHV//zw0CA== X-Received: by 2002:a05:6870:828d:b0:1c8:b870:4e5e with SMTP id q13-20020a056870828d00b001c8b8704e5emr28983262oae.3.1693232058505; Mon, 28 Aug 2023 07:14:18 -0700 (PDT) Received: from fabio-Precision-3551.. ([2804:14c:485:4b61:3c37:a69d:a4cd:94fc]) by smtp.gmail.com with ESMTPSA id l5-20020a056870e90500b001c4ede43955sm4323892oan.31.2023.08.28.07.14.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 28 Aug 2023 07:14:18 -0700 (PDT) From: Fabio Estevam To: daniel.lezcano@linaro.org Cc: rafael@kernel.org, amitk@kernel.org, rui.zhang@intel.com, linux-pm@vger.kernel.org, krzysztof.kozlowski+dt@linaro.org, robh+dt@kernel.org, conor+dt@kernel.org, devicetree@vger.kernel.org, Fabio Estevam Subject: [PATCH v2 3/3] thermal: thermal_core: Allow rebooting after critical temp Date: Mon, 28 Aug 2023 11:13:41 -0300 Message-Id: <20230828141341.1583591-3-festevam@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230828141341.1583591-1-festevam@gmail.com> References: <20230828141341.1583591-1-festevam@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org From: Fabio Estevam Currently, the default mechanism is to trigger a shutdown after the critical temperature is reached. In some embedded cases, such behavior does not suit well, as the board may be unattended in the field and rebooting may be a better approach. The bootloader may also check the temperature and only allow the boot to proceed when the temperature is below a certain threshold. Introduce support for allowing a reboot to be triggered after the critical temperature is reached. If the "critical-action" devicetree property is not found, fall back to the shutdown action to preserve the existing default behavior. Tested on a i.MX8MM board with the following devicetree changes: thermal-zones { cpu-thermal { critical-action = "reboot"; }; }; Signed-off-by: Fabio Estevam --- Changes since v1: - Adapt to handle 'critical-changes' property as string. drivers/thermal/thermal_core.c | 8 +++++++- drivers/thermal/thermal_of.c | 27 +++++++++++++++++++++++++++ include/linux/thermal.h | 6 ++++++ 3 files changed, 40 insertions(+), 1 deletion(-) diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c index a59700593d32..f69e1667acb1 100644 --- a/drivers/thermal/thermal_core.c +++ b/drivers/thermal/thermal_core.c @@ -320,11 +320,17 @@ void thermal_zone_device_critical(struct thermal_zone_device *tz) * Its a must for forced_emergency_poweroff_work to be scheduled. */ int poweroff_delay_ms = CONFIG_THERMAL_EMERGENCY_POWEROFF_DELAY_MS; + void (*hw_protection_action)(const char *reason, int ms_until_forced); dev_emerg(&tz->device, "%s: critical temperature reached, " "shutting down\n", tz->type); - hw_protection_shutdown("Temperature too high", poweroff_delay_ms); + hw_protection_action = hw_protection_shutdown; + + if (tz->action == THERMAL_CRITICAL_ACTION_REBOOT) + hw_protection_action = hw_protection_reboot; + + hw_protection_action("Temperature too high", poweroff_delay_ms); } EXPORT_SYMBOL(thermal_zone_device_critical); diff --git a/drivers/thermal/thermal_of.c b/drivers/thermal/thermal_of.c index 4ca905723429..8bc28cba7406 100644 --- a/drivers/thermal/thermal_of.c +++ b/drivers/thermal/thermal_of.c @@ -218,6 +218,31 @@ static struct device_node *of_thermal_zone_find(struct device_node *sensor, int return tz; } +static const char * const critical_actions[] = { + [THERMAL_CRITICAL_ACTION_SHUTDOWN] = "shutdown", + [THERMAL_CRITICAL_ACTION_REBOOT] = "reboot", +}; + +static void thermal_of_get_critical_action(struct device_node *np, + enum thermal_action *action) +{ + const char *action_string; + int i, ret; + + ret = of_property_read_string(np, "critical-action", &action_string); + if (ret < 0) + goto out_default_action; + + for (i = 0; i < ARRAY_SIZE(critical_actions); i++) + if (!strcasecmp(action_string, critical_actions[i])) { + *action = i; + return; + } + +out_default_action: + *action = THERMAL_CRITICAL_ACTION_SHUTDOWN; +} + static int thermal_of_monitor_init(struct device_node *np, int *delay, int *pdelay) { int ret; @@ -516,6 +541,8 @@ static struct thermal_zone_device *thermal_of_zone_register(struct device_node * goto out_kfree_trips; } + thermal_of_get_critical_action(np, &tz->action); + ret = thermal_zone_device_enable(tz); if (ret) { pr_err("Failed to enabled thermal zone '%s', id=%d: %d\n", diff --git a/include/linux/thermal.h b/include/linux/thermal.h index b449a46766f5..08854f640db9 100644 --- a/include/linux/thermal.h +++ b/include/linux/thermal.h @@ -34,6 +34,11 @@ struct thermal_cooling_device; struct thermal_instance; struct thermal_attr; +enum thermal_action { + THERMAL_CRITICAL_ACTION_SHUTDOWN, /* shutdown when crit temperature is reached */ + THERMAL_CRITICAL_ACTION_REBOOT, /* reboot when crit temperature is reached */ +}; + enum thermal_trend { THERMAL_TREND_STABLE, /* temperature is stable */ THERMAL_TREND_RAISING, /* temperature is raising */ @@ -187,6 +192,7 @@ struct thermal_zone_device { struct list_head node; struct delayed_work poll_queue; enum thermal_notify_event notify_event; + enum thermal_action action; }; /**