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[195.132.213.62]) by smtp.googlemail.com with ESMTPSA id z12-20020adff74c000000b00291f1a5ced6sm4381153wrp.53.2023.01.27.07.45.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 27 Jan 2023 07:45:19 -0800 (PST) From: Amjad Ouled-Ameur Date: Fri, 27 Jan 2023 16:44:46 +0100 Subject: [PATCH v9 5/5] thermal: mediatek: add delay after thermal banks initialization MIME-Version: 1.0 Message-Id: <20221018-up-i350-thermal-bringup-v9-5-55a1ae14af74@baylibre.com> References: <20221018-up-i350-thermal-bringup-v9-0-55a1ae14af74@baylibre.com> In-Reply-To: <20221018-up-i350-thermal-bringup-v9-0-55a1ae14af74@baylibre.com> To: "Rafael J. Wysocki" , Daniel Lezcano , Amit Kucheria , Zhang Rui , Rob Herring , Krzysztof Kozlowski Cc: linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, Fabien Parent , Matthias Brugger , AngeloGioacchino Del Regno , Rob Herring , Markus Schneider-Pargmann , Hsin-Yi Wang , Amjad Ouled-Ameur , Michael Kao X-Mailer: b4 0.11.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1674834313; l=1567; i=aouledameur@baylibre.com; s=20220920; h=from:subject:message-id; bh=fzmYYuArpv3TgjQmZi16fKXqYLE8Qo9JdtSrD1YAY5s=; b=MFTrCKH6Grd+hiqf7XlaT3d7PqHP384ilZ1t/Y0qFtXPGTpXcf79S/w4BloEnMVX32kgpJ/LQKIK q29F4NunDC16TysUENhaOg467p+38Wwi/oLGbSzCHLmF+AGZ0vQC X-Developer-Key: i=aouledameur@baylibre.com; a=ed25519; pk=HgYWawSL4qLGPx+RzJ+Cuu+V8Pi/KQnDDm1wjWPMOFE= Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Thermal sensor reads performed immediately after thermal bank initialization returns bogus values. This is currently tackled by returning 0 if the temperature is bogus (exceeding 200000). Instead, add a delay between the bank init and the thermal zone device register to properly fix this. Signed-off-by: Michael Kao Signed-off-by: Hsin-Yi Wang Signed-off-by: Amjad Ouled-Ameur Reviewed-by: AngeloGioacchino Del Regno --- drivers/thermal/mtk_thermal.c | 11 +++-------- 1 file changed, 3 insertions(+), 8 deletions(-) diff --git a/drivers/thermal/mtk_thermal.c b/drivers/thermal/mtk_thermal.c index b8e06f6c7c42..ab7db385afb3 100644 --- a/drivers/thermal/mtk_thermal.c +++ b/drivers/thermal/mtk_thermal.c @@ -730,14 +730,6 @@ static int mtk_thermal_bank_temperature(struct mtk_thermal_bank *bank) temp = mt->raw_to_mcelsius(mt, i, raw); - /* - * The first read of a sensor often contains very high bogus - * temperature value. Filter these out so that the system does - * not immediately shut down. - */ - if (temp > 200000) - temp = 0; - if (temp > max) max = temp; } @@ -1160,6 +1152,9 @@ static int mtk_thermal_probe(struct platform_device *pdev) platform_set_drvdata(pdev, mt); + // Delay for thermal banks to be ready + msleep(30); + tzdev = devm_thermal_of_zone_register(&pdev->dev, 0, mt, &mtk_thermal_ops); if (IS_ERR(tzdev)) {