Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932405AbbBZTBz (ORCPT ); Thu, 26 Feb 2015 14:01:55 -0500 Received: from foss.arm.com ([217.140.101.70]:41785 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932213AbbBZTBx (ORCPT ); Thu, 26 Feb 2015 14:01:53 -0500 From: Javi Merino To: edubezval@gmail.com, rui.zhang@intel.com Cc: linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, punit.agrawal@arm.com, broonie@kernel.org, tixy@linaro.org Subject: [PATCH v2 6/7] of: thermal: Introduce sustainable power for a thermal zone Date: Thu, 26 Feb 2015 19:00:32 +0000 Message-Id: <1424977233-15965-7-git-send-email-javi.merino@arm.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1424977233-15965-1-git-send-email-javi.merino@arm.com> References: <1424977233-15965-1-git-send-email-javi.merino@arm.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2794 Lines: 74 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 | 9 +++++++++ drivers/thermal/of-thermal.c | 4 ++++ 2 files changed, 13 insertions(+) diff --git a/Documentation/devicetree/bindings/thermal/thermal.txt b/Documentation/devicetree/bindings/thermal/thermal.txt index 29fe0bfae38e..8a49362dea6e 100644 --- a/Documentation/devicetree/bindings/thermal/thermal.txt +++ b/Documentation/devicetree/bindings/thermal/thermal.txt @@ -167,6 +167,13 @@ 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 at the desired + Size: one cell control temperature. For reference, the + sustainable power of a 4'' phone is typically + 2000mW, while on a 10'' tablet is around + 4500mW. + 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 @@ -546,6 +553,8 @@ thermal-zones { */ coefficients = <1200 -345 890>; + sustainable-power = <2500>; + trips { /* Trips are based on resulting linear equation */ cpu_trip: cpu-trip { diff --git a/drivers/thermal/of-thermal.c b/drivers/thermal/of-thermal.c index c606b85ea9f4..705b21d01f1c 100644 --- a/drivers/thermal/of-thermal.c +++ b/drivers/thermal/of-thermal.c @@ -866,6 +866,7 @@ 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; /* Check whether child is enabled or not */ if (!of_device_is_available(child)) @@ -892,6 +893,9 @@ 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, -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/