On 04/17/11 21:06, Jonathan Cameron wrote: > On 04/17/11 20:06, Jonathan Cameron wrote: >> Saves on a fair bit of code replication. > I clearly didn't think this through properly. It can be done much > more neatly with a single static iio_dev_attr and just explicitly > adding and removing it. See the trigger equivalent in the > iio-onwards tree that I have just pushed. > The following is how I 'should' have done it. Subject: [PATCH] staging:iio: Add core attribute handling for name of device. Saves on a fair bit of code replication. Signed-off-by: Jonathan Cameron <jic23@xxxxxxxxx> --- drivers/staging/iio/iio.h | 2 +- drivers/staging/iio/industrialio-core.c | 23 ++++++++++++++++++++++- 2 files changed, 23 insertions(+), 2 deletions(-) diff --git a/drivers/staging/iio/iio.h b/drivers/staging/iio/iio.h index b818f5f..febf20e 100644 --- a/drivers/staging/iio/iio.h +++ b/drivers/staging/iio/iio.h @@ -231,7 +231,7 @@ struct iio_dev { int num_channels; struct list_head channel_attr_list; - char *name; /*device name - IMPLEMENT */ + const char *name; int (*read_raw)(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, diff --git a/drivers/staging/iio/industrialio-core.c b/drivers/staging/iio/industrialio-core.c index 2e2e51d..8ee8f40 100644 --- a/drivers/staging/iio/industrialio-core.c +++ b/drivers/staging/iio/industrialio-core.c @@ -611,6 +611,16 @@ static void iio_device_remove_and_free_read_attr(struct iio_dev *dev_info, kfree(p); } +static ssize_t iio_show_dev_name(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct iio_dev *indio_dev = dev_get_drvdata(dev); + return sprintf(buf, "%s\n", indio_dev->name); +} + +static DEVICE_ATTR(name, S_IRUGO, iio_show_dev_name, NULL); + static int iio_device_register_sysfs(struct iio_dev *dev_info) { int i, ret = 0; @@ -638,8 +648,15 @@ static int iio_device_register_sysfs(struct iio_dev *dev_info) if (ret < 0) goto error_clear_attrs; } - + if (dev_info->name) { + ret = sysfs_add_file_to_group(&dev_info->dev.kobj, + &dev_attr_name.attr, + NULL); + if (ret) + goto error_clear_attrs; + } return 0; + error_clear_attrs: list_for_each_entry_safe(p, n, &dev_info->channel_attr_list, l) { @@ -657,6 +674,10 @@ static void iio_device_unregister_sysfs(struct iio_dev *dev_info) { struct iio_dev_attr *p, *n; + if (dev_info->name) + sysfs_remove_file_from_group(&dev_info->dev.kobj, + &dev_attr_name.attr, + NULL); list_for_each_entry_safe(p, n, &dev_info->channel_attr_list, l) { list_del(&p->l); iio_device_remove_and_free_read_attr(dev_info, p); -- 1.7.3.4 -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html