This change moves the entire buffer on the private adjd_s311_data type.
Since the device has 4 channels, it's not a big waste to just allocate the
maximum possible buffer and use only what's needed.
This is in contrast with free-ing and re-allocating the buffer on the
update_scan_mode hook.
Since the driver pushes buffer data with
iio_push_to_buffers_with_timestamp(), the buffer must also include a
64-bit buffer for the timestamp, for each sample-set.
With this change, the adjd_s311_update_scan_mode() is no longer needed.
Signed-off-by: Alexandru Ardelean <[email protected]>
---
Changelog v1 -> v2:
* https://patchwork.kernel.org/project/linux-iio/patch/[email protected]/
* split into 2 patches:
- first patch move the buffer on the adjd_s311_data object (i.e. this
patch)
- second patch to do the conversion to devm_ functions
drivers/iio/light/adjd_s311.c | 25 ++++++-------------------
1 file changed, 6 insertions(+), 19 deletions(-)
diff --git a/drivers/iio/light/adjd_s311.c b/drivers/iio/light/adjd_s311.c
index 17dac8d0e11d..caf852554897 100644
--- a/drivers/iio/light/adjd_s311.c
+++ b/drivers/iio/light/adjd_s311.c
@@ -54,7 +54,10 @@
struct adjd_s311_data {
struct i2c_client *client;
- u16 *buffer;
+ struct {
+ s16 chans[4];
+ s64 ts __aligned(8);
+ } scan;
};
enum adjd_s311_channel_idx {
@@ -129,10 +132,10 @@ static irqreturn_t adjd_s311_trigger_handler(int irq, void *p)
if (ret < 0)
goto done;
- data->buffer[j++] = ret & ADJD_S311_DATA_MASK;
+ data->scan.chans[j++] = ret & ADJD_S311_DATA_MASK;
}
- iio_push_to_buffers_with_timestamp(indio_dev, data->buffer, time_ns);
+ iio_push_to_buffers_with_timestamp(indio_dev, &data->scan, time_ns);
done:
iio_trigger_notify_done(indio_dev->trig);
@@ -225,23 +228,9 @@ static int adjd_s311_write_raw(struct iio_dev *indio_dev,
return -EINVAL;
}
-static int adjd_s311_update_scan_mode(struct iio_dev *indio_dev,
- const unsigned long *scan_mask)
-{
- struct adjd_s311_data *data = iio_priv(indio_dev);
-
- kfree(data->buffer);
- data->buffer = kmalloc(indio_dev->scan_bytes, GFP_KERNEL);
- if (data->buffer == NULL)
- return -ENOMEM;
-
- return 0;
-}
-
static const struct iio_info adjd_s311_info = {
.read_raw = adjd_s311_read_raw,
.write_raw = adjd_s311_write_raw,
- .update_scan_mode = adjd_s311_update_scan_mode,
};
static int adjd_s311_probe(struct i2c_client *client,
@@ -286,11 +275,9 @@ static int adjd_s311_probe(struct i2c_client *client,
static int adjd_s311_remove(struct i2c_client *client)
{
struct iio_dev *indio_dev = i2c_get_clientdata(client);
- struct adjd_s311_data *data = iio_priv(indio_dev);
iio_device_unregister(indio_dev);
iio_triggered_buffer_cleanup(indio_dev);
- kfree(data->buffer);
return 0;
}
--
2.31.1
Now that the driver's buffer is stored on the adjd_s311_data private
object, the driver is a simple conversion to use only device-managed
functions in the probe.
The iio_triggered_buffer_setup() and iio_device_register() functions are
the only ones needing conversion.
And i2c_set_clientdata() is no longer required.
Signed-off-by: Alexandru Ardelean <[email protected]>
---
drivers/iio/light/adjd_s311.c | 28 +++-------------------------
1 file changed, 3 insertions(+), 25 deletions(-)
diff --git a/drivers/iio/light/adjd_s311.c b/drivers/iio/light/adjd_s311.c
index caf852554897..6b33975c8d73 100644
--- a/drivers/iio/light/adjd_s311.c
+++ b/drivers/iio/light/adjd_s311.c
@@ -245,7 +245,6 @@ static int adjd_s311_probe(struct i2c_client *client,
return -ENOMEM;
data = iio_priv(indio_dev);
- i2c_set_clientdata(client, indio_dev);
data->client = client;
indio_dev->info = &adjd_s311_info;
@@ -254,32 +253,12 @@ static int adjd_s311_probe(struct i2c_client *client,
indio_dev->num_channels = ARRAY_SIZE(adjd_s311_channels);
indio_dev->modes = INDIO_DIRECT_MODE;
- err = iio_triggered_buffer_setup(indio_dev, NULL,
- adjd_s311_trigger_handler, NULL);
+ err = devm_iio_triggered_buffer_setup(&client->dev, indio_dev, NULL,
+ adjd_s311_trigger_handler, NULL);
if (err < 0)
return err;
- err = iio_device_register(indio_dev);
- if (err)
- goto exit_unreg_buffer;
-
- dev_info(&client->dev, "ADJD-S311 color sensor registered\n");
-
- return 0;
-
-exit_unreg_buffer:
- iio_triggered_buffer_cleanup(indio_dev);
- return err;
-}
-
-static int adjd_s311_remove(struct i2c_client *client)
-{
- struct iio_dev *indio_dev = i2c_get_clientdata(client);
-
- iio_device_unregister(indio_dev);
- iio_triggered_buffer_cleanup(indio_dev);
-
- return 0;
+ return devm_iio_device_register(&client->dev, indio_dev);
}
static const struct i2c_device_id adjd_s311_id[] = {
@@ -293,7 +272,6 @@ static struct i2c_driver adjd_s311_driver = {
.name = ADJD_S311_DRV_NAME,
},
.probe = adjd_s311_probe,
- .remove = adjd_s311_remove,
.id_table = adjd_s311_id,
};
module_i2c_driver(adjd_s311_driver);
--
2.31.1