From 10debf8c2da8011c8009dd4b3f6d0ab85891c81b Mon Sep 17 00:00:00 2001 From: Amjad Ouled-Ameur Date: Fri, 27 Jan 2023 16:44:46 +0100 Subject: [PATCH] thermal/drivers/mediatek: Add delay after thermal banks initialization 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 Link: https://lore.kernel.org/r/20221018-up-i350-thermal-bringup-v9-5-55a1ae14af74@baylibre.com Signed-off-by: Daniel Lezcano --- drivers/thermal/mediatek/auxadc_thermal.c | 11 +++-------- 1 file changed, 3 insertions(+), 8 deletions(-) diff --git a/drivers/thermal/mediatek/auxadc_thermal.c b/drivers/thermal/mediatek/auxadc_thermal.c index 3c959a8..b6bb9ea 100644 --- a/drivers/thermal/mediatek/auxadc_thermal.c +++ b/drivers/thermal/mediatek/auxadc_thermal.c @@ -816,14 +816,6 @@ static int mtk_thermal_bank_temperature(struct mtk_thermal_bank *bank) mt, conf->bank_data[bank->id].sensors[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; } @@ -1281,6 +1273,9 @@ 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)) { -- 2.7.4