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authorNeeraj Sanjay Kale <neeraj.sanjaykale@nxp.com>2023-03-16 20:22:12 +0300
committerLuiz Augusto von Dentz <luiz.von.dentz@intel.com>2023-04-24 07:51:25 +0300
commit8eaf839e4ac4feadf06e03eeff34059795450712 (patch)
treeb89e0251403aca48e670d30bf87295d8eee56596 /include
parent29f93a687f3c435e94d026ee1fc8ad18ce56b7fb (diff)
downloadlinux-8eaf839e4ac4feadf06e03eeff34059795450712.tar.xz
serdev: Add method to assert break signal over tty UART port
Adds serdev_device_break_ctl() and an implementation for ttyport. This function simply calls the break_ctl in tty layer, which can assert a break signal over UART-TX line, if the tty and the underlying platform and UART peripheral supports this operation. Signed-off-by: Neeraj Sanjay Kale <neeraj.sanjaykale@nxp.com> Reviewed-by: Simon Horman <simon.horman@corigine.com> Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Diffstat (limited to 'include')
-rw-r--r--include/linux/serdev.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/serdev.h b/include/linux/serdev.h
index babedb13785b..f5f97fa25e8a 100644
--- a/include/linux/serdev.h
+++ b/include/linux/serdev.h
@@ -93,6 +93,7 @@ struct serdev_controller_ops {
void (*wait_until_sent)(struct serdev_controller *, long);
int (*get_tiocm)(struct serdev_controller *);
int (*set_tiocm)(struct serdev_controller *, unsigned int, unsigned int);
+ int (*break_ctl)(struct serdev_controller *ctrl, unsigned int break_state);
};
/**
@@ -203,6 +204,7 @@ int serdev_device_write_buf(struct serdev_device *, const unsigned char *, size_
void serdev_device_wait_until_sent(struct serdev_device *, long);
int serdev_device_get_tiocm(struct serdev_device *);
int serdev_device_set_tiocm(struct serdev_device *, int, int);
+int serdev_device_break_ctl(struct serdev_device *serdev, int break_state);
void serdev_device_write_wakeup(struct serdev_device *);
int serdev_device_write(struct serdev_device *, const unsigned char *, size_t, long);
void serdev_device_write_flush(struct serdev_device *);
@@ -256,6 +258,10 @@ static inline int serdev_device_set_tiocm(struct serdev_device *serdev, int set,
{
return -EOPNOTSUPP;
}
+static inline int serdev_device_break_ctl(struct serdev_device *serdev, int break_state)
+{
+ return -EOPNOTSUPP;
+}
static inline int serdev_device_write(struct serdev_device *sdev, const unsigned char *buf,
size_t count, unsigned long timeout)
{