On Sat, Jul 06, 2013 at 12:18:16PM -0700, Guenter Roeck wrote:
> On Sat, Jul 06, 2013 at 08:01:51PM +0200, Jean Delvare wrote:
> > On Sat, 6 Jul 2013 10:57:47 -0700, Greg Kroah-Hartman wrote:
> > > On Sat, Jul 06, 2013 at 10:24:53AM -0700, Guenter Roeck wrote:
> > > > Signed-off-by: Guenter Roeck <linux@xxxxxxxxxxxx>
> > > > ---
> > > > drivers/hwmon/ds1621.c | 25 +++++++++----------------
> > > > 1 file changed, 9 insertions(+), 16 deletions(-)
> > > >
> > > > diff --git a/drivers/hwmon/ds1621.c b/drivers/hwmon/ds1621.c
> > > > index a26ba7a..f1d0fa0 100644
> > > > --- a/drivers/hwmon/ds1621.c
> > > > +++ b/drivers/hwmon/ds1621.c
> > > > @@ -358,11 +358,15 @@ static const struct attribute_group ds1621_group = {
> > > > .is_visible = ds1621_attribute_visible
> > > > };
> > > >
> > > > +static const struct attribute_group *ds1621_groups[] = {
> > > > + &ds1621_group,
> > > > + NULL
> > > > +};
> > > > +
> > > > static int ds1621_probe(struct i2c_client *client,
> > > > const struct i2c_device_id *id)
> > > > {
> > > > struct ds1621_data *data;
> > > > - int err;
> > > >
> > > > data = devm_kzalloc(&client->dev, sizeof(struct ds1621_data),
> > > > GFP_KERNEL);
> > > > @@ -377,22 +381,12 @@ static int ds1621_probe(struct i2c_client *client,
> > > > /* Initialize the DS1621 chip */
> > > > ds1621_init_client(client);
> > > >
> > > > - /* Register sysfs hooks */
> > > > - err = sysfs_create_group(&client->dev.kobj, &ds1621_group);
> > > > - if (err)
> > > > - return err;
> > > > -
> > > > - data->hwmon_dev = hwmon_device_register(&client->dev);
> > > > - if (IS_ERR(data->hwmon_dev)) {
> > > > - err = PTR_ERR(data->hwmon_dev);
> > > > - goto exit_remove_files;
> > > > - }
> > > > + data->hwmon_dev = hwmon_device_register_groups(&client->dev, data,
> > > > + ds1621_groups);
> > > > + if (IS_ERR(data->hwmon_dev))
> > > > + return PTR_ERR(data->hwmon_dev);
> > > >
> > > > return 0;
> > > > -
> > > > - exit_remove_files:
> > > > - sysfs_remove_group(&client->dev.kobj, &ds1621_group);
> > > > - return err;
> > >
> > > Aren't your sysfs files now being created attached to a different device
> > > than they originally were? Before this patch, they were being attached
> > > to the parent device of the hwmon device being created with the call to
> > > hwmon_device_register(), and now they are attached to the device created
> > > with that call.
> > >
> > > Is that what you really want? Can userspace handle this movement of
> > > files?
> >
> > libsensors supports both, as well as pwmconfig/fancontrol. Some drivers
> > are already doing that so every application dealing with hwmon devices
> > should handle it already.
> >
> Yes, and I tested it with the new nct6775 driver to make sure that it works.
> The i2c and spi drivers need some more work, though - the name attribute is
> now missing and will have to be created for the hwmon device itself. If you have
> an idea how to do that without adding it in every driver, please let me know.
Why do you need a name attribute at all? Shouldn't that just be the
name of the device, or the parent?
Can you make the name be part of the groups always?
greg k-h
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