This driver has a get_temp function used by the thermal framework that
uses pm functions.
However, the driver isn't registered in pm before it is registered in
thermal framework, resulting in the pm_resume not being called and thus
the IP not enabled.
When the IP is disabled, the raw temp value is always 0. With the
devices currently supported, it isn't a problem since with their
respective formula, they return a really cold SoC temperature which
isn't a problem for the thermal framework. But for future SoC that have
a different formula, it could return a critically hot temperature,
forcing the thermal framework to shutdown the board.
Signed-off-by: Quentin Schulz <quentin.sch...@free-electrons.com>
---
drivers/iio/adc/sun4i-gpadc-iio.c | 34 ++++++++++++++------------------
1 file changed, 15 insertions(+), 19 deletions(-)
diff --git a/drivers/iio/adc/sun4i-gpadc-iio.c
b/drivers/iio/adc/sun4i-gpadc-iio.c
index 137f577..392d47f 100644
--- a/drivers/iio/adc/sun4i-gpadc-iio.c
+++ b/drivers/iio/adc/sun4i-gpadc-iio.c
@@ -529,17 +529,10 @@ static int sun4i_gpadc_probe_dt(struct platform_device
*pdev,
return ret;
}
- if (!IS_ENABLED(CONFIG_THERMAL_OF))
- return 0;
+ if (IS_ENABLED(CONFIG_THERMAL_OF))
+ info->sensor_device = &pdev->dev;
- info->sensor_device = &pdev->dev;
- info->tzd = thermal_zone_of_sensor_register(info->sensor_device, 0,
- info, &sun4i_ts_tz_ops);
- if (IS_ERR(info->tzd))
- dev_err(&pdev->dev, "could not register thermal sensor: %ld\n",
- PTR_ERR(info->tzd));
-
- return PTR_ERR_OR_ZERO(info->tzd);
+ return 0;
}
static int sun4i_gpadc_probe_mfd(struct platform_device *pdev,
@@ -586,15 +579,6 @@ static int sun4i_gpadc_probe_mfd(struct platform_device
*pdev,
* return the temperature.
*/
info->sensor_device = pdev->dev.parent;
- info->tzd = thermal_zone_of_sensor_register(info->sensor_device,
- 0, info,
- &sun4i_ts_tz_ops);
- if (IS_ERR(info->tzd)) {
- dev_err(&pdev->dev,
- "could not register thermal sensor: %ld\n",
- PTR_ERR(info->tzd));
- return PTR_ERR(info->tzd);
- }
} else {
indio_dev->num_channels =
ARRAY_SIZE(sun4i_gpadc_channels_no_temp);
@@ -664,6 +648,18 @@ static int sun4i_gpadc_probe(struct platform_device *pdev)
pm_runtime_set_suspended(&pdev->dev);
pm_runtime_enable(&pdev->dev);
+ if (IS_ENABLED(CONFIG_THERMAL_OF)) {
+ info->tzd = thermal_zone_of_sensor_register(info->sensor_device,
+ 0, info,
+ &sun4i_ts_tz_ops);
+ if (IS_ERR(info->tzd)) {
+ dev_err(&pdev->dev,
+ "could not register thermal sensor: %ld\n",
+ PTR_ERR(info->tzd));
+ return PTR_ERR(info->tzd);
+ }
+ }
+
ret = devm_iio_device_register(&pdev->dev, indio_dev);
if (ret < 0) {
dev_err(&pdev->dev, "could not register the device\n");
base-commit: 1f183459b5144384e2669a3f757d36bacab108cf
--
git-series 0.9.1
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