From patchwork Mon Jan 23 16:30:46 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Srinivas Pandruvada X-Patchwork-Id: 646457 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 2CC47C05027 for ; Mon, 23 Jan 2023 16:31:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232233AbjAWQa6 (ORCPT ); Mon, 23 Jan 2023 11:30:58 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33634 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231724AbjAWQa6 (ORCPT ); Mon, 23 Jan 2023 11:30:58 -0500 Received: from mga06.intel.com (mga06b.intel.com [134.134.136.31]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 733CD29E0F; Mon, 23 Jan 2023 08:30:57 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1674491457; x=1706027457; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=3XjT1Rd6YFhugKX8f0xdY/kqfnqSuJ54Immi5pga/EU=; b=CXDqZSQrWfafafBjBEZYKNyq5/PkleDgeY9Ew4MbxezOT0wrGrXxEiou dSmVx1NehIO24f6VM28+QgQ2g/NKQFnMRbGWU4kMPhp+GEz08lBvOfLjO bTrWqX6LF1mYRkIIpqDIL3HQy5edPq5DQ6/8IPWW4KRKn6oL4a0T3o35S H9/X/G0aohje3AspGfxqKGNxGPSdnG73wZoxq8kAtW6CDOY9TpJXSiYpm hl2BbF7bbE0fqyfc4nozXZnAUDBUHgUPG7DsX7ojQeZFgOaj2LYlFgJKF jz5hd2IhmtNAc4MiGmYZbnk9ozlCTrKqohSXSwSKfK6F25lFNQsArjNdu A==; X-IronPort-AV: E=McAfee;i="6500,9779,10599"; a="388433210" X-IronPort-AV: E=Sophos;i="5.97,240,1669104000"; d="scan'208";a="388433210" Received: from orsmga006.jf.intel.com ([10.7.209.51]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 23 Jan 2023 08:30:57 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6500,9779,10599"; a="639236200" X-IronPort-AV: E=Sophos;i="5.97,240,1669104000"; d="scan'208";a="639236200" Received: from spandruv-desk.jf.intel.com ([10.54.75.8]) by orsmga006.jf.intel.com with ESMTP; 23 Jan 2023 08:30:56 -0800 From: Srinivas Pandruvada To: rafael@kernel.org, rui.zhang@intel.com, daniel.lezcano@linaro.org Cc: linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, Srinivas Pandruvada , kernel test robot Subject: [PATCH v3] thermal: int340x_thermal: Add production mode attribute Date: Mon, 23 Jan 2023 08:30:46 -0800 Message-Id: <20230123163046.358879-1-srinivas.pandruvada@linux.intel.com> X-Mailer: git-send-email 2.31.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org It is possible that the system manufacturer locks down thermal tuning beyond what is usually done on the given platform. In that case user space calibration tools should not try to adjust the thermal configuration of the system. To allow user space to check if that is the case, add a new sysfs attribute "production_mode" that will be present when the ACPI DCFG method is present under the INT3400 device object in the ACPI Namespace. Signed-off-by: Srinivas Pandruvada --- v3: Build warning reported by for missing static Reported-by: kernel test robot v2 Addressed comments from Rafael: - Updated commit excatly same as Rafael wrote - Removed production_mode_support bool - Use sysfs_emit - Update documentation .../driver-api/thermal/intel_dptf.rst | 3 ++ .../intel/int340x_thermal/int3400_thermal.c | 48 +++++++++++++++++++ 2 files changed, 51 insertions(+) diff --git a/Documentation/driver-api/thermal/intel_dptf.rst b/Documentation/driver-api/thermal/intel_dptf.rst index 372bdb4d04c6..f5c193cccbda 100644 --- a/Documentation/driver-api/thermal/intel_dptf.rst +++ b/Documentation/driver-api/thermal/intel_dptf.rst @@ -84,6 +84,9 @@ DPTF ACPI Drivers interface https:/github.com/intel/thermal_daemon for decoding thermal table. +``production_mode`` (RO) + When different from zero, manufacturer locked thermal configuration + from further changes. ACPI Thermal Relationship table interface ------------------------------------------ diff --git a/drivers/thermal/intel/int340x_thermal/int3400_thermal.c b/drivers/thermal/intel/int340x_thermal/int3400_thermal.c index db8a6f63657d..23ea21238bbd 100644 --- a/drivers/thermal/intel/int340x_thermal/int3400_thermal.c +++ b/drivers/thermal/intel/int340x_thermal/int3400_thermal.c @@ -60,6 +60,7 @@ struct int3400_thermal_priv { int odvp_count; int *odvp; u32 os_uuid_mask; + int production_mode; struct odvp_attr *odvp_attrs; }; @@ -315,6 +316,44 @@ static int int3400_thermal_get_uuids(struct int3400_thermal_priv *priv) return result; } +static ssize_t production_mode_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct int3400_thermal_priv *priv = dev_get_drvdata(dev); + + return sysfs_emit(buf, "%d\n", priv->production_mode); +} + +static DEVICE_ATTR_RO(production_mode); + +static int production_mode_init(struct int3400_thermal_priv *priv) +{ + unsigned long long mode; + acpi_status status; + int ret; + + priv->production_mode = -1; + + status = acpi_evaluate_integer(priv->adev->handle, "DCFG", NULL, &mode); + /* If the method is not present, this is not an error */ + if (ACPI_FAILURE(status)) + return 0; + + ret = sysfs_create_file(&priv->pdev->dev.kobj, &dev_attr_production_mode.attr); + if (ret) + return ret; + + priv->production_mode = mode; + + return 0; +} + +static void production_mode_exit(struct int3400_thermal_priv *priv) +{ + if (priv->production_mode >= 0) + sysfs_remove_file(&priv->pdev->dev.kobj, &dev_attr_production_mode.attr); +} + static ssize_t odvp_show(struct device *dev, struct device_attribute *attr, char *buf) { @@ -610,8 +649,15 @@ static int int3400_thermal_probe(struct platform_device *pdev) if (result) goto free_sysfs; + result = production_mode_init(priv); + if (result) + goto free_notify; + return 0; +free_notify: + acpi_remove_notify_handler(priv->adev->handle, ACPI_DEVICE_NOTIFY, + int3400_notify); free_sysfs: cleanup_odvp(priv); if (!ZERO_OR_NULL_PTR(priv->data_vault)) { @@ -638,6 +684,8 @@ static int int3400_thermal_remove(struct platform_device *pdev) { struct int3400_thermal_priv *priv = platform_get_drvdata(pdev); + production_mode_exit(priv); + acpi_remove_notify_handler( priv->adev->handle, ACPI_DEVICE_NOTIFY, int3400_notify);