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iio: cros_ec: Reapply range at resume

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EC does not currently preserve range across sensor reinit.
If sensor is powered down at suspend, it will default to the EC default
range at resume, not the range set by the host.

Save range if modified, and apply at resume.

Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Gwendal Grignou
2020-05-26 21:35:17 -07:00
committed by Jonathan Cameron
parent 79846e33aa
commit e7e3b9d23f
5 changed files with 47 additions and 4 deletions
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drivers/iio/common/cros_ec_sensors/cros_ec_sensors.c
+5
View File
@@ -200,6 +200,10 @@ static int cros_ec_sensors_write(struct iio_dev *indio_dev,
st->core.param.sensor_range.roundup = 1;
ret = cros_ec_motion_send_host_cmd(&st->core, 0);
if (ret == 0) {
st->core.range_updated = true;
st->core.curr_range = val;
}
break;
default:
ret = cros_ec_sensors_core_write(
@@ -315,6 +319,7 @@ MODULE_DEVICE_TABLE(platform, cros_ec_sensors_ids);
static struct platform_driver cros_ec_sensors_platform_driver = {
.driver = {
.name = "cros-ec-sensors",
.pm = &cros_ec_sensors_pm_ops,
},
.probe = cros_ec_sensors_probe,
.id_table = cros_ec_sensors_ids,
drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c
+21
View File
@@ -824,5 +824,26 @@ int cros_ec_sensors_core_write(struct cros_ec_sensors_core_state *st,
}
EXPORT_SYMBOL_GPL(cros_ec_sensors_core_write);
static int __maybe_unused cros_ec_sensors_resume(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct iio_dev *indio_dev = platform_get_drvdata(pdev);
struct cros_ec_sensors_core_state *st = iio_priv(indio_dev);
int ret = 0;
if (st->range_updated) {
mutex_lock(&st->cmd_lock);
st->param.cmd = MOTIONSENSE_CMD_SENSOR_RANGE;
st->param.sensor_range.data = st->curr_range;
st->param.sensor_range.roundup = 1;
ret = cros_ec_motion_send_host_cmd(st, 0);
mutex_unlock(&st->cmd_lock);
}
return ret;
}
SIMPLE_DEV_PM_OPS(cros_ec_sensors_pm_ops, NULL, cros_ec_sensors_resume);
EXPORT_SYMBOL_GPL(cros_ec_sensors_pm_ops);
MODULE_DESCRIPTION("ChromeOS EC sensor hub core functions");
MODULE_LICENSE("GPL v2");