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Thu, 20 May 2021 02:32:21 +0000 (GMT) Subject: Re: [PATCH v1 1/7] PM / devfreq: tegra30: Support thermal cooling To: Dmitry Osipenko , Thierry Reding , Jonathan Hunter , Rob Herring , MyungJoo Ham , Kyungmin Park , Peter Geis , Matt Merhar Cc: linux-tegra@vger.kernel.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org From: Chanwoo Choi Organization: Samsung Electronics Message-ID: <65cdeb50-7ec1-4ed4-1eeb-342c4c915aa1@samsung.com> Date: Thu, 20 May 2021 11:50:50 +0900 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:59.0) Gecko/20100101 Thunderbird/59.0 MIME-Version: 1.0 In-Reply-To: <20210510211008.30300-2-digetx@gmail.com> Content-Language: en-US Content-Transfer-Encoding: 7bit X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFtrCJsWRmVeSWpSXmKPExsWy7bCmga7pqaUJBs195hbzj5xjtVj98TGj RcusRSwWZ5vesFtc3jWHzeJz7xFGi84vs9gs7rXsZbW43biCzeLsM2+L1r1H2C1+7prH4sDj sXPWXXaPTas62Tx6m9+xefS0bWLy6NuyitHj8ya5ALaobJuM1MSU1CKF1Lzk/JTMvHRbJe/g eOd4UzMDQ11DSwtzJYW8xNxUWyUXnwBdt8wcoBuVFMoSc0qBQgGJxcVK+nY2RfmlJakKGfnF JbZKqQUpOQWWBXrFibnFpXnpesn5uVaGBgZGpkCFCdkZX298Zyy4xlFx+OtWxgbGaexdjJwc EgImEt977rB1MXJxCAnsYJS4vH8BI0hCSOATo0T7unCIxGdGiebbDUwwHRs/9jNBJHYxShw5 +pwZwnnPKLFn5wlmkCphAS+JOYePs4AkRAQOMUnMn9AENJeDg1mgVGL3BhuQGjYBLYn9L26w gdj8AooSV388BlvNK2An8eLjdbA5LAKqEnv2dYPViAqESZzc1gJVIyhxcuYTFhCbU8BMYsX3 L2DXMQuIS9x6Mh/KlpfY/nYOM8TVRzgkuv7bQtguEuv+3YaKC0u8Or4FGhZSEp/f7WWDsKsl Vp48Ag4XCYEORokt+y+wQiSMJfYvncwE8YumxPpd+hBhRYmdv+cyQuzlk3j3tYcVpERCgFei o00IokRZ4vKDu9BAlJRY3N7JNoFRaRaSb2Yh+WAWkg9mISxbwMiyilEstaA4Nz212LDAEDmy NzGCk6+W6Q7GiW8/6B1iZOJgPMQowcGsJMK73XtxghBvSmJlVWpRfnxRaU5q8SFGU2D4TmSW Ek3OB6b/vJJ4Q1MjY2NjCxNDM1NDQyVx3nTn6gQhgfTEktTs1NSC1CKYPiYOTqkGpj1pKxcX Pste9ofRslTo6wYnwy1G4c2czjs2eomK1FR8KYhz/HH35y3F4gsivvVbWvreR51fxPLtqXtU epuMQmm85bR5Ze1S97YHzPp4tNjUWpZ9SpKTe4fgmS11NollJ1b8e1orpNXdwLFMNnWD/+aZ d2qZLQubynm3RU5r5Ej9ruXypGPavPM7AqO0skwTpbV+xj5sfcPId1wuIPX2TRVDm4Q1AaW2 ploHL1neeXVkqWp7R7tS4we3Cdochp8UHt16wVDfecshZ5Yk2/GkaRY/T/9mfMHp3WdX6zjl lRBr1UvtDecfvrouyuXbpSEgfGKeT+7mP3F6Dk8mhsdzRBfyphnfMM71+/C24KkSS3FGoqEW c1FxIgA7w7R9RwQAAA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrAIsWRmVeSWpSXmKPExsWy7bCSvK7pqaUJBt/PiljMP3KO1WL1x8eM Fi2zFrFYnG16w25xedccNovPvUcYLTq/zGKzuNeyl9XiduMKNouzz7wtWvceYbf4uWseiwOP x85Zd9k9Nq3qZPPobX7H5tHTtonJo2/LKkaPz5vkAtiiuGxSUnMyy1KL9O0SuDK+3vjOWHCN o+Lw162MDYzT2LsYOTkkBEwkNn7sZ+pi5OIQEtjBKLHo2H0WiISkxLSLR5m7GDmAbGGJw4eL IWreMkocfnwbrEZYwEtizuHjYLaIwBEmiW89fiA2s0CpxLON7YwQDVsZJa4v6GICSbAJaEns f3GDDcTmF1CUuPrjMSOIzStgJ/Hi43VmEJtFQFViz75usBpRgTCJnUseM0HUCEqcnPkEbBmn gJnEiu9fmCCWqUv8mXeJGcIWl7j1ZD5UXF5i+9s5zBMYhWchaZ+FpGUWkpZZSFoWMLKsYpRM LSjOTc8tNiwwykst1ytOzC0uzUvXS87P3cQIjkQtrR2Me1Z90DvEyMTBeIhRgoNZSYR3u/fi BCHelMTKqtSi/Pii0pzU4kOM0hwsSuK8F7pOxgsJpCeWpGanphakFsFkmTg4pRqYpHuYrR/P aijfeia3kCPl7cSTH9/P3y19flXoK5uX6hGNGdcdpl3lCnjkpdk5uUDiVZ56lmnZ/um/+6XS r1qv7vOdxzNjh3sP+7G3TWFubg9vflPcuDI1PZPD6Nyx0KAJd3w1J4es454189rk8mjpNC8T fp83b+69ehIle0OBY9qh9rkvxcVFHeuzs1PC5u9k2bdnztdVYrKe9sIcTJqXtL/PW+RmVN3A +bV10eT9Uoda178oteS9w5krxJ4bfqij8dTexW1b/kbu3cLMZ/NB7FmJ+hPltE6TUM/0lPda fJI5gZmzFeaYPX+f9YKzSiVb4ej+ld9Mw44xdyYGZL7129A5Y+Eil2fHNwq8CbVRYinOSDTU Yi4qTgQAgQat8zMDAAA= X-CMS-MailID: 20210520023221epcas1p4ef055525be61fa87393e57e9401dde82 X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" X-Sendblock-Type: SVC_REQ_APPROVE CMS-TYPE: 101P DLP-Filter: Pass X-CFilter-Loop: Reflected X-CMS-RootMailID: 20210510211156epcas1p4d6b1e317b12d97433fa31b43ecce23da References: <20210510211008.30300-1-digetx@gmail.com> <20210510211008.30300-2-digetx@gmail.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 5/11/21 6:10 AM, Dmitry Osipenko wrote: > Expose ACTMON devfreq device as a cooling device in order to throttle > memory freq on overheat. Throttling of memory freq has a significant > cooling effect on NVIDIA Tegra SoCs since higher memory freqs require > higher SoC core voltage which is one of the main causes of the heating. > > Signed-off-by: Dmitry Osipenko > --- > drivers/devfreq/tegra30-devfreq.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/drivers/devfreq/tegra30-devfreq.c b/drivers/devfreq/tegra30-devfreq.c > index ce83f883ca65..10661eb2aed8 100644 > --- a/drivers/devfreq/tegra30-devfreq.c > +++ b/drivers/devfreq/tegra30-devfreq.c > @@ -688,6 +688,7 @@ static struct devfreq_dev_profile tegra_devfreq_profile = { > .polling_ms = ACTMON_SAMPLING_PERIOD, > .target = tegra_devfreq_target, > .get_dev_status = tegra_devfreq_get_dev_status, > + .is_cooling_device = true, > }; > > static int tegra_governor_get_target(struct devfreq *devfreq, > Applied it. Thanks. -- Best Regards, Chanwoo Choi Samsung Electronics