From: Matt Ranostay <matt.ranostay@konsulko.com>
To: linux-media@vger.kernel.org
Cc: Matt Ranostay <matt.ranostay@konsulko.com>
Subject: [PATCH v2 1/2] media: video-i2c: check if chip struct has set_power function
Date: Wed, 21 Nov 2018 19:52:28 -0800 [thread overview]
Message-ID: <20181122035229.3630-2-matt.ranostay@konsulko.com> (raw)
In-Reply-To: <20181122035229.3630-1-matt.ranostay@konsulko.com>
Not all future supported video chips will always have power management
support, and so it is important to check before calling set_power() is
defined.
Signed-off-by: Matt Ranostay <matt.ranostay@konsulko.com>
---
drivers/media/i2c/video-i2c.c | 21 ++++++++++++++++-----
1 file changed, 16 insertions(+), 5 deletions(-)
diff --git a/drivers/media/i2c/video-i2c.c b/drivers/media/i2c/video-i2c.c
index 981166010c9b..a64e1a725a20 100644
--- a/drivers/media/i2c/video-i2c.c
+++ b/drivers/media/i2c/video-i2c.c
@@ -736,9 +736,11 @@ static int video_i2c_probe(struct i2c_client *client,
video_set_drvdata(&data->vdev, data);
i2c_set_clientdata(client, data);
- ret = data->chip->set_power(data, true);
- if (ret)
- goto error_unregister_device;
+ if (data->chip->set_power) {
+ ret = data->chip->set_power(data, true);
+ if (ret)
+ goto error_unregister_device;
+ }
pm_runtime_get_noresume(&client->dev);
pm_runtime_set_active(&client->dev);
@@ -767,7 +769,8 @@ static int video_i2c_probe(struct i2c_client *client,
pm_runtime_disable(&client->dev);
pm_runtime_set_suspended(&client->dev);
pm_runtime_put_noidle(&client->dev);
- data->chip->set_power(data, false);
+ if (data->chip->set_power)
+ data->chip->set_power(data, false);
error_unregister_device:
v4l2_device_unregister(v4l2_dev);
@@ -791,7 +794,9 @@ static int video_i2c_remove(struct i2c_client *client)
pm_runtime_disable(&client->dev);
pm_runtime_set_suspended(&client->dev);
pm_runtime_put_noidle(&client->dev);
- data->chip->set_power(data, false);
+
+ if (data->chip->set_power)
+ data->chip->set_power(data, false);
video_unregister_device(&data->vdev);
@@ -804,6 +809,9 @@ static int video_i2c_pm_runtime_suspend(struct device *dev)
{
struct video_i2c_data *data = i2c_get_clientdata(to_i2c_client(dev));
+ if (!data->chip->set_power)
+ return 0;
+
return data->chip->set_power(data, false);
}
@@ -811,6 +819,9 @@ static int video_i2c_pm_runtime_resume(struct device *dev)
{
struct video_i2c_data *data = i2c_get_clientdata(to_i2c_client(dev));
+ if (!data->chip->set_power)
+ return 0;
+
return data->chip->set_power(data, true);
}
--
2.17.1
next prev parent reply other threads:[~2018-11-22 14:30 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-22 3:52 [PATCH v2 0/2] media: video-i2c: add Melexis MLX90640 thermal camera support Matt Ranostay
2018-11-22 3:52 ` Matt Ranostay [this message]
2018-11-22 3:52 ` [PATCH v2 2/2] " Matt Ranostay
2018-11-22 8:57 ` Hans Verkuil
2018-11-22 15:00 ` Matt Ranostay
2018-12-07 11:28 ` Hans Verkuil
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