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usb: gadget: f_serial: add configfs support

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this patch implements the new configfs based interface
on f_serial function driver.

Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Andrzej Pietrasiewicz 2013-03-27 09:12:03 +01:00 committed by Felipe Balbi
parent 9786b45612
commit 0b6a1e6ff7
1 changed files with 55 additions and 0 deletions
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55
drivers/usb/gadget/f_serial.c
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@ -258,6 +258,59 @@ fail:
return status;
}
static inline struct f_serial_opts *to_f_serial_opts(struct config_item *item)
{
return container_of(to_config_group(item), struct f_serial_opts,
func_inst.group);
}
CONFIGFS_ATTR_STRUCT(f_serial_opts);
static ssize_t f_serial_attr_show(struct config_item *item,
struct configfs_attribute *attr,
char *page)
{
struct f_serial_opts *opts = to_f_serial_opts(item);
struct f_serial_opts_attribute *f_serial_opts_attr =
container_of(attr, struct f_serial_opts_attribute, attr);
ssize_t ret = 0;
if (f_serial_opts_attr->show)
ret = f_serial_opts_attr->show(opts, page);
return ret;
}
static void serial_attr_release(struct config_item *item)
{
struct f_serial_opts *opts = to_f_serial_opts(item);
usb_put_function_instance(&opts->func_inst);
}
static struct configfs_item_operations serial_item_ops = {
.release = serial_attr_release,
.show_attribute = f_serial_attr_show,
};
static ssize_t f_serial_port_num_show(struct f_serial_opts *opts, char *page)
{
return sprintf(page, "%u\n", opts->port_num);
}
static struct f_serial_opts_attribute f_serial_port_num =
__CONFIGFS_ATTR_RO(port_num, f_serial_port_num_show);
static struct configfs_attribute *acm_attrs[] = {
&f_serial_port_num.attr,
NULL,
};
static struct config_item_type serial_func_type = {
.ct_item_ops = &serial_item_ops,
.ct_attrs = acm_attrs,
.ct_owner = THIS_MODULE,
};
static void gser_free_inst(struct usb_function_instance *f)
{
struct f_serial_opts *opts;
@ -282,6 +335,8 @@ static struct usb_function_instance *gser_alloc_inst(void)
kfree(opts);
return ERR_PTR(ret);
}
config_group_init_type_name(&opts->func_inst.group, "",
&serial_func_type);
return &opts->func_inst;
}