diff options
Diffstat (limited to 'drivers/thermal/imx_thermal.c')
| -rw-r--r-- | drivers/thermal/imx_thermal.c | 32 |
1 files changed, 18 insertions, 14 deletions
diff --git a/drivers/thermal/imx_thermal.c b/drivers/thermal/imx_thermal.c index 1d6c801c1eb9..77a962f1837b 100644 --- a/drivers/thermal/imx_thermal.c +++ b/drivers/thermal/imx_thermal.c @@ -490,27 +490,30 @@ static int imx_thermal_suspend(struct device *dev) { struct imx_thermal_data *data = dev_get_drvdata(dev); struct regmap *map = data->tempmon; - u32 val; - regmap_read(map, TEMPSENSE0, &val); - if ((val & TEMPSENSE0_POWER_DOWN) == 0) { - /* - * If a measurement is taking place, wait for a long enough - * time for it to finish, and then check again. If it still - * does not finish, something must go wrong. - */ - udelay(50); - regmap_read(map, TEMPSENSE0, &val); - if ((val & TEMPSENSE0_POWER_DOWN) == 0) - return -ETIMEDOUT; - } + /* + * Need to disable thermal sensor, otherwise, when thermal core + * try to get temperature before thermal sensor resume, a wrong + * temperature will be read as the thermal sensor is powered + * down. + */ + regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_MEASURE_TEMP); + regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_POWER_DOWN); + data->mode = THERMAL_DEVICE_DISABLED; return 0; } static int imx_thermal_resume(struct device *dev) { - /* Nothing to do for now */ + struct imx_thermal_data *data = dev_get_drvdata(dev); + struct regmap *map = data->tempmon; + + /* Enabled thermal sensor after resume */ + regmap_write(map, TEMPSENSE0 + REG_CLR, TEMPSENSE0_POWER_DOWN); + regmap_write(map, TEMPSENSE0 + REG_SET, TEMPSENSE0_MEASURE_TEMP); + data->mode = THERMAL_DEVICE_ENABLED; + return 0; } #endif @@ -522,6 +525,7 @@ static const struct of_device_id of_imx_thermal_match[] = { { .compatible = "fsl,imx6q-tempmon", }, { /* end */ } }; +MODULE_DEVICE_TABLE(of, of_imx_thermal_match); static struct platform_driver imx_thermal = { .driver = { |