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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>
This commit is contained in:
Mike Isely 2008-08-31 20:57:54 -03:00 committed by Mauro Carvalho Chehab
parent 26dd1c57a0
commit 0b7c2c9598
1 changed files with 24 additions and 0 deletions
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24
drivers/media/video/pvrusb2/pvrusb2-sysfs.c
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@ -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)) {