From patchwork Wed Mar 30 00:41:34 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Srikar Srimath Tirumala X-Patchwork-Id: 603194 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3qZTNN0TV7z9sBc for ; Wed, 30 Mar 2016 11:41:24 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755428AbcC3AlX (ORCPT ); Tue, 29 Mar 2016 20:41:23 -0400 Received: from hqemgate16.nvidia.com ([216.228.121.65]:1553 "EHLO hqemgate16.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754461AbcC3AlW (ORCPT ); Tue, 29 Mar 2016 20:41:22 -0400 Received: from hqnvupgp07.nvidia.com (Not Verified[216.228.121.13]) by hqemgate16.nvidia.com id ; Tue, 29 Mar 2016 17:41:24 -0700 Received: from hqemhub02.nvidia.com ([172.20.150.31]) by hqnvupgp07.nvidia.com (PGP Universal service); Tue, 29 Mar 2016 17:39:37 -0700 X-PGP-Universal: processed; by hqnvupgp07.nvidia.com on Tue, 29 Mar 2016 17:39:37 -0700 Received: from srikars-mint.nvidia.com (172.20.144.16) by hqemhub02.nvidia.com (172.20.150.31) with Microsoft SMTP Server id 8.3.406.0; Tue, 29 Mar 2016 17:41:21 -0700 From: Srikar Srimath Tirumala To: edubezval@gmail.com, rui.zhang@intel.com, srinivas.pandruvada@intel.com, linux-pm@vger.kernel.org, linux-tegra@vger.kernel.org CC: mlongnecker@nvidia.com, Srikar Srimath Tirumala Subject: [PATCH v3 1/4] thermal: send notifications for cdev state change Date: Tue, 29 Mar 2016 17:41:34 -0700 Message-ID: <1459298497-29481-2-git-send-email-srikars@nvidia.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1459298497-29481-1-git-send-email-srikars@nvidia.com> References: <1459298497-29481-1-git-send-email-srikars@nvidia.com> X-NVConfidentiality: public MIME-Version: 1.0 Sender: linux-tegra-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-tegra@vger.kernel.org Send notifications using sysfs_notify to indicate that a cooling device cur state has changed. This can alert the listeners that hardware clocks are about to be throttled. A listening user space application can use this notification to perform workload throttling. Change-Id: I71cd6d11bff87f181fa3b7db36bf6c953d1d77eb Signed-off-by: Srikar Srimath Tirumala --- drivers/thermal/thermal_core.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c index d4b5465..b09fff1 100644 --- a/drivers/thermal/thermal_core.c +++ b/drivers/thermal/thermal_core.c @@ -1642,6 +1642,7 @@ void thermal_cdev_update(struct thermal_cooling_device *cdev) cdev->updated = true; trace_cdev_update(cdev, target); dev_dbg(&cdev->device, "set to state %lu\n", target); + sysfs_notify(&cdev->device.kobj, NULL, "cur_state"); } EXPORT_SYMBOL(thermal_cdev_update);