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[79.17.196.24]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-b65eb526175sm1337364466b.56.2025.10.22.03.56.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 22 Oct 2025 03:56:25 -0700 (PDT) Date: Wed, 22 Oct 2025 12:56:22 +0200 From: Alberto Merciai To: Frank Li Cc: "Rafael J. Wysocki" , Daniel Lezcano , Zhang Rui , Lukasz Luba , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , Pengfei Li , Marco Felsch , linux-pm@vger.kernel.org, devicetree@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, ye.li@nxp.com, joy.zou@nxp.com Subject: Re: [PATCH v7 3/3] arm64: dts: imx91: Add thermal-sensor and thermal-zone support Message-ID: References: <20251020-imx91tmu-v7-0-48d7d9f25055@nxp.com> <20251020-imx91tmu-v7-3-48d7d9f25055@nxp.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20251020-imx91tmu-v7-3-48d7d9f25055@nxp.com> On Mon, Oct 20, 2025 at 03:00:42PM -0400, Frank Li wrote: > Add thermal-sensor and thermal-zone support. > > Signed-off-by: Frank Li > --- > changes in v7 > - new patch > --- > arch/arm64/boot/dts/freescale/imx91.dtsi | 58 ++++++++++++++++++++++++++++++++ > 1 file changed, 58 insertions(+) > > diff --git a/arch/arm64/boot/dts/freescale/imx91.dtsi b/arch/arm64/boot/dts/freescale/imx91.dtsi > index 4d8300b2a7bca33bd0613db9e79d2fba6b40c052..f075592bfc01f1eb94d2a2bd8eea907cc2aed090 100644 > --- a/arch/arm64/boot/dts/freescale/imx91.dtsi > +++ b/arch/arm64/boot/dts/freescale/imx91.dtsi > @@ -6,6 +6,54 @@ > #include "imx91-pinfunc.h" > #include "imx91_93_common.dtsi" > > +/{ > + thermal-zones { > + cpu-thermal { > + polling-delay-passive = <250>; > + polling-delay = <2000>; > + thermal-sensors = <&tmu 0>; > + > + trips { > + cpu_alert: cpu-alert { > + temperature = <80000>; > + hysteresis = <2000>; > + type = "passive"; > + }; > + > + cpu_crit: cpu-crit { > + temperature = <90000>; > + hysteresis = <2000>; > + type = "critical"; > + }; > + }; > + > + cooling-maps { > + map0 { > + trip = <&cpu_alert>; > + cooling-device = > + <&A55_0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>; > + }; > + }; > + }; > + }; > +}; Here you define cooling-maps with passive and critical trip points. I was trying test that by enabling CONFIG_THERMAL_EMULATION and setting the emulated temp via echo 85000 > /sys/class/thermal/thermal_zone0/emul_temp By checking with mhz (from lmbench Yocto recipe) command I was expecting that the 91 start throttling but is not the case, Am I missing something? Thanks, Alberto