From patchwork Tue Jun 17 09:14:53 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Javi Merino X-Patchwork-Id: 360413 Return-Path: X-Original-To: incoming-dt@patchwork.ozlabs.org Delivered-To: patchwork-incoming-dt@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 552FE14009C for ; Tue, 17 Jun 2014 19:16:16 +1000 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756301AbaFQJP5 (ORCPT ); Tue, 17 Jun 2014 05:15:57 -0400 Received: from service87.mimecast.com ([91.220.42.44]:54421 "EHLO service87.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756279AbaFQJP4 (ORCPT ); Tue, 17 Jun 2014 05:15:56 -0400 Received: from cam-owa1.Emea.Arm.com (fw-tnat.cambridge.arm.com [217.140.96.21]) by service87.mimecast.com; Tue, 17 Jun 2014 10:15:54 +0100 Received: from e104805 ([10.1.255.212]) by cam-owa1.Emea.Arm.com with Microsoft SMTPSVC(6.0.3790.3959); Tue, 17 Jun 2014 10:15:44 +0100 Received: by e104805 (sSMTP sendmail emulation); Tue, 17 Jun 2014 10:15:50 +0100 From: "Javi Merino" To: linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org Cc: punit.agrawal@arm.com, broonie@kernel.org, devicetree@vger.kernel.org, Zhang Rui , Eduardo Valentin Subject: [RFC PATCH v4 7/7] of: thermal: Introduce sustainable power for a thermal zone Date: Tue, 17 Jun 2014 10:14:53 +0100 Message-Id: <1402996493-3578-8-git-send-email-javi.merino@arm.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1402996493-3578-1-git-send-email-javi.merino@arm.com> References: <1402996493-3578-1-git-send-email-javi.merino@arm.com> X-OriginalArrivalTime: 17 Jun 2014 09:15:44.0424 (UTC) FILETIME=[B7C25280:01CF8A0C] X-MC-Unique: 114061710155409601 Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org From: Punit Agrawal Introduce an optional property called, sustainable-power, which represents the power (in mW) which the thermal zone can safely dissipate. If provided the property is parsed and associated with the thermal zone via the thermal zone parameters. Cc: Zhang Rui Cc: Eduardo Valentin Signed-off-by: Punit Agrawal --- Documentation/devicetree/bindings/thermal/thermal.txt | 4 ++++ drivers/thermal/of-thermal.c | 4 ++++ 2 files changed, 8 insertions(+) diff --git a/Documentation/devicetree/bindings/thermal/thermal.txt b/Documentation/devicetree/bindings/thermal/thermal.txt index f5db6b72a36f..c6eb9a8d2aed 100644 --- a/Documentation/devicetree/bindings/thermal/thermal.txt +++ b/Documentation/devicetree/bindings/thermal/thermal.txt @@ -167,6 +167,10 @@ Optional property: by means of sensor ID. Additional coefficients are interpreted as constant offset. +- sustainable-power: An estimate of the sustainable power (in mW) that the + Type: unsigned thermal zone can dissipate. + Size: one cell + Note: The delay properties are bound to the maximum dT/dt (temperature derivative over time) in two situations for a thermal zone: (i) - when passive cooling is activated (polling-delay-passive); and diff --git a/drivers/thermal/of-thermal.c b/drivers/thermal/of-thermal.c index 04b1be7fa018..eaf81ea654b9 100644 --- a/drivers/thermal/of-thermal.c +++ b/drivers/thermal/of-thermal.c @@ -769,6 +769,7 @@ int __init of_parse_thermal_zones(void) for_each_child_of_node(np, child) { struct thermal_zone_device *zone; struct thermal_zone_params *tzp; + u32 prop; tz = thermal_of_build_thermal_zone(child); if (IS_ERR(tz)) { @@ -791,6 +792,9 @@ int __init of_parse_thermal_zones(void) /* No hwmon because there might be hwmon drivers registering */ tzp->no_hwmon = true; + if (!of_property_read_u32(child, "sustainable-power", &prop)) + tzp->sustainable_power = prop; + zone = thermal_zone_device_register(child->name, tz->ntrips, 0, tz, ops, tzp,