serdev: Introduce devm_serdev_device_open()

Add code implementing managed version of serdev_device_open() for
serdev device drivers that "open" the device during driver's lifecycle
only once (e.g. opened in .probe() and closed in .remove()).

Cc: [email protected]
Cc: [email protected]
Cc: Rob Herring <[email protected]>
Cc: [email protected]
Cc: Guenter Roeck <[email protected]>
Cc: Lucas Stach <[email protected]>
Cc: Nikita Yushchenko <[email protected]>
Cc: Lee Jones <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Cc: Pavel Machek <[email protected]>
Cc: Andy Shevchenko <[email protected]>
Cc: Johan Hovold <[email protected]>
Cc: Sebastian Reichel <[email protected]>
Acked-by: Rob Herring <[email protected]>
Reviewed-by: Sebastian Reichel <[email protected]>
Reviewed-by: Guenter Roeck <[email protected]>
Signed-off-by: Andrey Smirnov <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/linux/serdev.h b/include/linux/serdev.h
index e69402d4a8ae..9929063bd45d 100644
--- a/include/linux/serdev.h
+++ b/include/linux/serdev.h
@@ -193,6 +193,7 @@ static inline int serdev_controller_receive_buf(struct serdev_controller *ctrl,
 
 int serdev_device_open(struct serdev_device *);
 void serdev_device_close(struct serdev_device *);
+int devm_serdev_device_open(struct device *, struct serdev_device *);
 unsigned int serdev_device_set_baudrate(struct serdev_device *, unsigned int);
 void serdev_device_set_flow_control(struct serdev_device *, bool);
 int serdev_device_write_buf(struct serdev_device *, const unsigned char *, size_t);