target/linux/mediatek/patches-6.1/830-v6.4-17-thermal-drivers-mediatek-Add-delay-after-thermal-ban.patch

   1 From 4eead70db74922bc61e9d0b4591524369a335751 Mon Sep 17 00:00:00 2001
   2 From: Amjad Ouled-Ameur <aouledameur@baylibre.com>
   3 Date: Fri, 27 Jan 2023 16:44:46 +0100
   4 Subject: [PATCH 13/42] thermal/drivers/mediatek: Add delay after thermal banks
   5  initialization
   6
   7 Thermal sensor reads performed immediately after thermal bank
   8 initialization returns bogus values. This is currently tackled by returning
   9 0 if the temperature is bogus (exceeding 200000).
  10
  11 Instead, add a delay between the bank init and the thermal zone device
  12 register to properly fix this.
  13
  14 Signed-off-by: Michael Kao <michael.kao@mediatek.com>
  15 Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org>
  16 Signed-off-by: Amjad Ouled-Ameur <aouledameur@baylibre.com>
  17 Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
  18 Link: https://lore.kernel.org/r/20221018-up-i350-thermal-bringup-v9-5-55a1ae14af74@baylibre.com
  19 Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
  20 ---
  21  drivers/thermal/mediatek/auxadc_thermal.c | 11 +++--------
  22  1 file changed, 3 insertions(+), 8 deletions(-)
  23
  24 --- a/drivers/thermal/mediatek/auxadc_thermal.c
  25 +++ b/drivers/thermal/mediatek/auxadc_thermal.c
  26 @@ -816,14 +816,6 @@ static int mtk_thermal_bank_temperature(
  27                         mt, conf->bank_data[bank->id].sensors[i], raw);
  28
  29
  30 -               /*
  31 -                * The first read of a sensor often contains very high bogus
  32 -                * temperature value. Filter these out so that the system does
  33 -                * not immediately shut down.
  34 -                */
  35 -               if (temp > 200000)
  36 -                       temp = 0;
  37 -
  38                 if (temp > max)
  39                         max = temp;
  40         }
  41 @@ -1281,6 +1273,9 @@ static int mtk_thermal_probe(struct plat
  42
  43         platform_set_drvdata(pdev, mt);
  44
  45 +       /* Delay for thermal banks to be ready */
  46 +       msleep(30);
  47 +
  48         tzdev = devm_thermal_of_zone_register(&pdev->dev, 0, mt,
  49                                               &mtk_thermal_ops);
  50         if (IS_ERR(tzdev)) {