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serdev: add a tty port controller driver

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Add a serdev controller driver for tty ports.

The controller is registered with serdev when tty ports are registered
with the TTY core. As the TTY core is built-in only, this has the side
effect of making serdev built-in as well.

Signed-off-by: Rob Herring <robh@kernel.org>
Reviewed-By: Sebastian Reichel <sre@kernel.org>
Tested-By: Sebastian Reichel <sre@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Rob Herring
2017-02-02 13:48:08 -06:00
committed by Greg Kroah-Hartman
parent cd6484e183
commit bed35c6dfa
4 changed files with 255 additions and 0 deletions
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21
include/linux/serdev.h
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@@ -238,4 +238,25 @@ static inline int serdev_device_write_room(struct serdev_device *sdev)
#endif /* CONFIG_SERIAL_DEV_BUS */
/*
* serdev hooks into TTY core
*/
struct tty_port;
struct tty_driver;
#ifdef CONFIG_SERIAL_DEV_CTRL_TTYPORT
struct device *serdev_tty_port_register(struct tty_port *port,
struct device *parent,
struct tty_driver *drv, int idx);
void serdev_tty_port_unregister(struct tty_port *port);
#else
static inline struct device *serdev_tty_port_register(struct tty_port *port,
struct device *parent,
struct tty_driver *drv, int idx)
{
return ERR_PTR(-ENODEV);
}
static inline void serdev_tty_port_unregister(struct tty_port *port) {}
#endif /* CONFIG_SERIAL_DEV_CTRL_TTYPORT */
#endif /*_LINUX_SERDEV_H */