diff options
| author |   Mike Isely <isely@pobox.com> | 2008-08-31 20:57:54 -0300 |
|---|---|---|
| committer |   Mauro Carvalho Chehab <mchehab@redhat.com> | 2008-10-12 09:36:57 -0200 |
| commit | 0b7c2c9598e7447ad6a9d157491e6c5459ae56de (patch) | |
| tree | 0ff641d7efe5edd7597efe5a1372458809e1b262 /drivers/media/video/pvrusb2/pvrusb2-sysfs.c | |
| parent | V4L/DVB (8898): pvrusb2: Be able to programmatically retrieve a control's default value (diff) | |
| download | linux-dev-0b7c2c9598e7447ad6a9d157491e6c5459ae56de.tar.xz linux-dev-0b7c2c9598e7447ad6a9d157491e6c5459ae56de.zip | |
V4L/DVB (8899): pvrusb2: Implement default value retrieval in sysfs interface
Signed-off-by: Mike Isely <isely@pobox.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video/pvrusb2/pvrusb2-sysfs.c')
| -rw-r--r-- | drivers/media/video/pvrusb2/pvrusb2-sysfs.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/media/video/pvrusb2/pvrusb2-sysfs.c b/drivers/media/video/pvrusb2/pvrusb2-sysfs.c index 46a8c39ba030..ac01b11f7b99 100644 --- a/drivers/media/video/pvrusb2/pvrusb2-sysfs.c +++ b/drivers/media/video/pvrusb2/pvrusb2-sysfs.c @@ -65,6 +65,7 @@ struct pvr2_sysfs_ctl_item { struct device_attribute attr_type; struct device_attribute attr_min; struct device_attribute attr_max; + struct device_attribute attr_def; struct device_attribute attr_enum; struct device_attribute attr_bits; struct device_attribute attr_val; @@ -145,6 +146,24 @@ static ssize_t show_max(struct device *class_dev, return scnprintf(buf, PAGE_SIZE, "%ld\n", val); } +static ssize_t show_def(struct device *class_dev, + struct device_attribute *attr, + char *buf) +{ + struct pvr2_sysfs_ctl_item *cip; + int val; + int ret; + cip = container_of(attr, struct pvr2_sysfs_ctl_item, attr_def); + ret = pvr2_ctrl_get_def(cip->cptr, &val); + pvr2_sysfs_trace("pvr2_sysfs(%p) show_def(cid=%d) is %d, stat=%d", + cip->chptr, cip->ctl_id, val, ret); + if (ret < 0) { + /* Keep checkpatch.pl quiet */ + return ret; + } + return scnprintf(buf, PAGE_SIZE, "%d\n", val); +} + static ssize_t show_val_norm(struct device *class_dev, struct device_attribute *attr, char *buf) @@ -320,6 +339,10 @@ static void pvr2_sysfs_add_control(struct pvr2_sysfs *sfp,int ctl_id) cip->attr_max.attr.mode = S_IRUGO; cip->attr_max.show = show_max; + cip->attr_def.attr.name = "def_val"; + cip->attr_def.attr.mode = S_IRUGO; + cip->attr_def.show = show_def; + cip->attr_val.attr.name = "cur_val"; cip->attr_val.attr.mode = S_IRUGO; @@ -343,6 +366,7 @@ static void pvr2_sysfs_add_control(struct pvr2_sysfs *sfp,int ctl_id) cip->attr_gen[acnt++] = &cip->attr_name.attr; cip->attr_gen[acnt++] = &cip->attr_type.attr; cip->attr_gen[acnt++] = &cip->attr_val.attr; + cip->attr_gen[acnt++] = &cip->attr_def.attr; cip->attr_val.show = show_val_norm; cip->attr_val.store = store_val_norm; if (pvr2_ctrl_has_custom_symbols(cptr)) { |