From mboxrd@z Thu Jan 1 00:00:00 1970 From: Rob Herring Subject: Re: [PATCH v1 11/12] of: Add bindings of OC hw throttle for Tegra soctherm Date: Mon, 18 Feb 2019 14:32:04 -0600 Message-ID: <20190218203204.GA12911@bogus> References: <1545118484-23641-1-git-send-email-wni@nvidia.com> <1545118484-23641-13-git-send-email-wni@nvidia.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <1545118484-23641-13-git-send-email-wni@nvidia.com> Sender: linux-kernel-owner@vger.kernel.org To: Wei Ni Cc: thierry.reding@gmail.com, daniel.lezcano@linaro.org, edubezval@gmail.com, linux-tegra@vger.kernel.org, rui.zhang@intel.com, srikars@nvidia.com, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org List-Id: devicetree@vger.kernel.org On Tue, Dec 18, 2018 at 03:34:43PM +0800, Wei Ni wrote: > Add OC HW throttle configuration for soctherm in DT. > It is used to describe the OCx throttle events. > > Signed-off-by: Wei Ni > --- > .../bindings/thermal/nvidia,tegra124-soctherm.txt | 26 ++++++++++++++++++++++ > 1 file changed, 26 insertions(+) > > diff --git a/Documentation/devicetree/bindings/thermal/nvidia,tegra124-soctherm.txt b/Documentation/devicetree/bindings/thermal/nvidia,tegra124-soctherm.txt > index cf6d0be56b7a..d112a8e59ec3 100644 > --- a/Documentation/devicetree/bindings/thermal/nvidia,tegra124-soctherm.txt > +++ b/Documentation/devicetree/bindings/thermal/nvidia,tegra124-soctherm.txt > @@ -64,6 +64,21 @@ Required properties : > - #cooling-cells: Should be 1. This cooling device only support on/off state. > See ./thermal.txt for a description of this property. > > + Optional properties: The following properties are T210 specific and > + valid only for OCx throttle events. > + - nvidia,count-threshold: Specifies the number of OC events that are > + required for triggering an interrupt. Interrupts are not triggered if > + the property is missing. A value of 0 will interrupt on every OC alarm. > + - nvidia,polarity-active-low: Configures the polarity of the OC alaram > + signal. Accepted values are 1 for assert low and 0 for assert high. > + Default value is 0. Why not boolean? > + - nvidia,alarm-filter: Number of clocks to filter event. When the filter > + expires (which means the OC event has not occurred for a long time), > + the counter is cleared and filter is rearmed. Default value is 0. > + - nvidia,throttle-period: Specifies the number of uSec for which > + throttling is engaged after the OC event is deasserted. Default value > + is 0. Needs a unit suffix as defined in property-units.txt. > + > Optional properties: > - nvidia,thermtrips : When present, this property specifies the temperature at > which the soctherm hardware will assert the thermal trigger signal to the > @@ -134,6 +149,17 @@ Example : > * arbiter will select the highest priority as the final throttle > * settings to skip cpu pulse. > */ > + > + throttle_oc1: oc1 { > + nvidia,priority = <50>; > + nvidia,polarity-active-low = <1>; > + nvidia,count-threshold = <100>; > + nvidia,alarm-filter = <5100000>; > + nvidia,throttle-period = <0>; > + nvidia,cpu-throt-percent = <75>; > + nvidia,gpu-throt-level = > + ; > + }; > }; > }; > > -- > 2.7.4 >