linux-kernel - [PATCH v1 4/7] dt-bindings: devfreq: tegra30-actmon: Add cooling-cells

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Date:   Tue, 11 May 2021 00:10:05 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Rob Herring <robh+dt@...nel.org>,
        MyungJoo Ham <myungjoo.ham@...sung.com>,
        Kyungmin Park <kyungmin.park@...sung.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Peter Geis <pgwipeout@...il.com>,
        Matt Merhar <mattmerhar@...tonmail.com>
Cc:     linux-tegra@...r.kernel.org, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Subject: [PATCH v1 4/7] dt-bindings: devfreq: tegra30-actmon: Add cooling-cells

The ACTMON watches activity of memory clients. Decisions about a minimum
required frequency are made based on the info from ACTMON. We can use
ACTMON as a thermal cooling device by limiting the required frequency.
Document new cooling-cells property of NVIDIA Tegra ACTMON hardware unit.

Signed-off-by: Dmitry Osipenko <digetx@...il.com>
---
 .../devicetree/bindings/devfreq/nvidia,tegra30-actmon.yaml   | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/devfreq/nvidia,tegra30-actmon.yaml b/Documentation/devicetree/bindings/devfreq/nvidia,tegra30-actmon.yaml
index 2a940d5d7ab4..0aa9459b7751 100644
--- a/Documentation/devicetree/bindings/devfreq/nvidia,tegra30-actmon.yaml
+++ b/Documentation/devicetree/bindings/devfreq/nvidia,tegra30-actmon.yaml
@@ -63,6 +63,9 @@ properties:
       Should contain freqs and voltages and opp-supported-hw property, which
       is a bitfield indicating SoC speedo ID mask.
 
+  "#cooling-cells":
+    const: 2
+
 required:
   - compatible
   - reg
@@ -74,6 +77,7 @@ required:
   - interconnects
   - interconnect-names
   - operating-points-v2
+  - "#cooling-cells"
 
 additionalProperties: false
 
@@ -118,4 +122,5 @@ examples:
         operating-points-v2 = <&dvfs_opp_table>;
         interconnects = <&mc TEGRA30_MC_MPCORER &emc>;
         interconnect-names = "cpu-read";
+        #cooling-cells = <2>;
     };
-- 
2.30.2