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[2003:e4:1f3f:4900:f22f:74ff:fe1f:3a53]) by smtp.gmail.com with ESMTPSA id p8-20020a170906b20800b009adce1c97ccsm11335626ejz.53.2023.10.12.10.58.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 12 Oct 2023 10:58:43 -0700 (PDT) From: Thierry Reding To: Daniel Lezcano , "Rafael J . Wysocki" , Thierry Reding , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: Amit Kucheria , Zhang Rui , Jon Hunter , linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-tegra@vger.kernel.org Subject: [PATCH v2 02/13] dt-bindings: thermal: tegra: Document throttle temperature Date: Thu, 12 Oct 2023 19:58:23 +0200 Message-ID: <20231012175836.3408077-3-thierry.reding@gmail.com> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20231012175836.3408077-1-thierry.reding@gmail.com> References: <20231012175836.3408077-1-thierry.reding@gmail.com> MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM, RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-tegra@vger.kernel.org From: Thierry Reding Each throttling configuration needs to specify the temperature threshold at which it should start throttling. Previously this was tied to a given trip point as a cooling device and used the temperature specified for that trip point. This doesn't work well because the throttling mechanism is not a cooling device in the traditional sense. Instead, allow device trees to specify the throttle temperature in the throttle configuration directly so that the throttle doesn't need to be exposed as a cooling device. Signed-off-by: Thierry Reding --- Changes in v2: - rename temperature to temperature-millicelsius and drop $ref - add hysteresis-millicelsius property .../bindings/thermal/nvidia,tegra124-soctherm.yaml | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/Documentation/devicetree/bindings/thermal/nvidia,tegra124-soctherm.yaml b/Documentation/devicetree/bindings/thermal/nvidia,tegra124-soctherm.yaml index 04a2ba1aa946..0eb6277082fe 100644 --- a/Documentation/devicetree/bindings/thermal/nvidia,tegra124-soctherm.yaml +++ b/Documentation/devicetree/bindings/thermal/nvidia,tegra124-soctherm.yaml @@ -121,6 +121,20 @@ properties: # high (85%, TEGRA_SOCTHERM_THROT_LEVEL_HIGH) - 3 + temperature-millicelsius: + minimum: -273000 + maximum: 200000 + description: The temperature threshold (in millicelsius) that, + when crossed, will trigger the configured automatic throttling. + + hysteresis-millicelsius: + description: An unsigned integer expressing the hysteresis delta + (in millicelsius) with respect to the threshold temperature + property above. Throttling will be initiated when the + temperature falls below (temperature - hysteresis). This avoids + situations where throttling is repeatedly initiated and stopped + because of minor temperature variations. + # optional # Tegra210 specific and valid only for OCx throttle events nvidia,count-threshold: