From patchwork Sun Nov 19 13:05:51 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Fabio Estevam X-Patchwork-Id: 745235 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="CnbjXPFY" Received: from mail-pf1-x434.google.com (mail-pf1-x434.google.com [IPv6:2607:f8b0:4864:20::434]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id ECA82182; Sun, 19 Nov 2023 05:06:07 -0800 (PST) Received: by mail-pf1-x434.google.com with SMTP id d2e1a72fcca58-6bcdfcde944so1045319b3a.1; Sun, 19 Nov 2023 05:06:07 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1700399167; x=1701003967; darn=vger.kernel.org; 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=A09XQ/iM8ir9KSsU7sYyrVg8iTGWGF8CT8MAp5IDCU8=; b=CnbjXPFYRERgcAbgDuLwh8bsrlHIcCtluP8c9G9x4Ah3yzQjqfUrTPu7RYesp+qWLR zO/8U2JE/oiJ2J7d5liRqtfWO9cZixZbHyOtZP26okN1tR4P3GK8bwS830Myn9dJihKq NY/0T4g73T5IZjkoG81Mam6gf1fYAMTEwb7PXWci+p8Ge/88BjxN1Q/tRwt2EXAmXuZt /qOpchCTsEGlgPkVzs4xOl8UJg2fymUHm9Xt5iK21STQDVCaCRRLkvWbghQciLaN896d Zlug0sPNp3/+knguZI2OnEeJoTfLyIR60Ka+bFQ5mB7zwpmcE/J5BiVRsDkREHk3nTbQ AZEw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1700399167; x=1701003967; 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=A09XQ/iM8ir9KSsU7sYyrVg8iTGWGF8CT8MAp5IDCU8=; b=i4XC2xH8mGnkuwkKa+KK4/H+d7r3vZYIBvmhULgM3cE6CG3IJ0OqrpKt5DzGkjIdpt vL2WqwEL09rjK9cjh8afi+qml8jeMnPA+HChOwRJYycCj0pwl8VtwFpj8Aaf9MscMWLP g38QV+X1/hdp2zy8ym2odYd0uUZQIy91a7ObfkVNfvvodKmLIji5BAjItHLcLrA5FvaB aSzq3m+rY1vovgpeWHaM+vYEGRjIRFudz6FbdcZnqdPDhCiWCaE40ddi6uFRcLHpKdYX Bzt/mc7nnTZyJBisv2MpgT4JyFGKAxzMWbhiFa4/atVKQ2b6LoL9M+7Vk6o8spbtpbCR rAyg== X-Gm-Message-State: AOJu0YzI7bXOlXaoZGudGahHKxZSbTIXUcrRE5W2xE6Ezkeoz9tnRFQm 8UWfyXXwIY05ihI/s6RIp+Q= X-Google-Smtp-Source: AGHT+IFQl4HKK6ys65WrWUwifoI4NPzXWOD3ZBmz1vcxHtWWOBZHlmULJn/28SRkbfmyA643+YWtzA== X-Received: by 2002:a17:902:f691:b0:1cf:55c7:94e9 with SMTP id l17-20020a170902f69100b001cf55c794e9mr3726397plg.2.1700399167219; Sun, 19 Nov 2023 05:06:07 -0800 (PST) Received: from fabio-Precision-3551.. ([2804:14c:485:4b61:8afe:6d39:e955:7d2a]) by smtp.gmail.com with ESMTPSA id ik14-20020a170902ab0e00b001bde65894c8sm4433696plb.268.2023.11.19.05.06.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 19 Nov 2023 05:06:06 -0800 (PST) From: Fabio Estevam To: daniel.lezcano@linaro.org Cc: rafael@kernel.org, krzysztof.kozlowski+dt@linaro.org, robh+dt@kernel.org, conor+dt@kernel.org, mazziesaccount@gmail.com, linux-pm@vger.kernel.org, devicetree@vger.kernel.org, Fabio Estevam Subject: [PATCH v11 4/4] thermal: thermal_of: Allow rebooting after critical temp Date: Sun, 19 Nov 2023 10:05:51 -0300 Message-Id: <20231119130551.2416869-4-festevam@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231119130551.2416869-1-festevam@gmail.com> References: <20231119130551.2416869-1-festevam@gmail.com> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 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. If a custom ops->critical exists, then it takes preference over critical-actions. 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 v10: - None drivers/thermal/thermal_of.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/thermal/thermal_of.c b/drivers/thermal/thermal_of.c index 1e0655b63259..4d6c22e0ed85 100644 --- a/drivers/thermal/thermal_of.c +++ b/drivers/thermal/thermal_of.c @@ -475,6 +475,7 @@ static struct thermal_zone_device *thermal_of_zone_register(struct device_node * struct thermal_zone_params tzp = {}; struct thermal_zone_device_ops *of_ops; struct device_node *np; + const char *action; int delay, pdelay; int ntrips, mask; int ret; @@ -511,6 +512,11 @@ static struct thermal_zone_device *thermal_of_zone_register(struct device_node * mask = GENMASK_ULL((ntrips) - 1, 0); + ret = of_property_read_string(np, "critical-action", &action); + if (!ret) + if (!of_ops->critical && !strcasecmp(action, "reboot")) + of_ops->critical = thermal_zone_device_critical_reboot; + tz = thermal_zone_device_register_with_trips(np->name, trips, ntrips, mask, data, of_ops, &tzp, pdelay, delay);