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author | Andrzej Pietrasiewicz <andrzej.p@samsung.com> | 2013-03-27 09:12:03 +0100 |
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committer | Felipe Balbi <balbi@ti.com> | 2013-04-03 14:43:35 +0300 |
commit | 0b6a1e6ff7e62a1ab5a8924bffb12c17c183308a (patch) | |
tree | 723323da9aeb3781ace1f1b8e5ce7ac87ae42079 /drivers/usb/gadget | |
parent | 9786b4561228099f579ad88912aa305812526ea1 (diff) | |
download | op-kernel-dev-0b6a1e6ff7e62a1ab5a8924bffb12c17c183308a.zip op-kernel-dev-0b6a1e6ff7e62a1ab5a8924bffb12c17c183308a.tar.gz |
usb: gadget: f_serial: add configfs support
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>
Diffstat (limited to 'drivers/usb/gadget')
-rw-r--r-- | drivers/usb/gadget/f_serial.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/drivers/usb/gadget/f_serial.c b/drivers/usb/gadget/f_serial.c index 49c3d14..981113c 100644 --- a/drivers/usb/gadget/f_serial.c +++ b/drivers/usb/gadget/f_serial.c @@ -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; } |