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Serial: allow port drivers to have a default attribute group

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Some serial drivers (like 8250), want to add sysfs files.  We need to do
so in a race-free way, so allow any port to be able to specify an
attribute group that should be added at device creation time.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Yoshihiro YUNOMAE <yoshihiro.yunomae.ez@hitachi.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Greg Kroah-Hartman 2014-07-16 01:19:34 +00:00
parent c8b29f049e
commit 266dcff03e
2 changed files with 19 additions and 7 deletions
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2
include/linux/serial_core.h
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@ -199,6 +199,8 @@ struct uart_port {
unsigned char suspended;
unsigned char irq_wake;
unsigned char unused[2];
struct attribute_group *attr_group; /* port specific attributes */
const struct attribute_group **tty_groups; /* all attributes (serial core use only) */
void *private_data; /* generic platform data pointer */
};