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usb: gadget: u_serial: allow more console gadget ports

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Allow configuring more than one console using USB serial or ACM gadget.

By default, only first (ttyGS0) is a console, but this may be changed
using function's new "console" attribute.

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Michał Mirosław
2019-08-10 10:42:51 +02:00
committed by Felipe Balbi
parent b417343c6a
commit d7cb8fb7aa
4 changed files with 97 additions and 0 deletions
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21
drivers/usb/gadget/function/f_acm.c
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@@ -771,6 +771,24 @@ static struct configfs_item_operations acm_item_ops = {
.release = acm_attr_release,
};
#ifdef CONFIG_U_SERIAL_CONSOLE
static ssize_t f_acm_console_store(struct config_item *item,
const char *page, size_t count)
{
return gserial_set_console(to_f_serial_opts(item)->port_num,
page, count);
}
static ssize_t f_acm_console_show(struct config_item *item, char *page)
{
return gserial_get_console(to_f_serial_opts(item)->port_num, page);
}
CONFIGFS_ATTR(f_acm_, console);
#endif /* CONFIG_U_SERIAL_CONSOLE */
static ssize_t f_acm_port_num_show(struct config_item *item, char *page)
{
return sprintf(page, "%u\n", to_f_serial_opts(item)->port_num);
@@ -779,6 +797,9 @@ static ssize_t f_acm_port_num_show(struct config_item *item, char *page)
CONFIGFS_ATTR_RO(f_acm_, port_num);
static struct configfs_attribute *acm_attrs[] = {
#ifdef CONFIG_U_SERIAL_CONSOLE
&f_acm_attr_console,
#endif
&f_acm_attr_port_num,
NULL,
};