serdev: implement get/set tiocm

Add method for getting and setting tiocm.

Acked-by: Pavel Machek <pavel@ucw.cz>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

diff --git a/drivers/tty/serdev/core.c b/drivers/tty/serdev/core.c
index a63b740..1e1cbae 100644 (file)
--- a/drivers/tty/serdev/core.c
+++ b/drivers/tty/serdev/core.c
@@ -184,6 +184,28 @@ void serdev_device_wait_until_sent(struct serdev_device *serdev, long timeout)
 }
 EXPORT_SYMBOL_GPL(serdev_device_wait_until_sent);
 
+int serdev_device_get_tiocm(struct serdev_device *serdev)
+{
+       struct serdev_controller *ctrl = serdev->ctrl;
+
+       if (!ctrl || !ctrl->ops->get_tiocm)
+               return -ENOTSUPP;
+
+       return ctrl->ops->get_tiocm(ctrl);
+}
+EXPORT_SYMBOL_GPL(serdev_device_get_tiocm);
+
+int serdev_device_set_tiocm(struct serdev_device *serdev, int set, int clear)
+{
+       struct serdev_controller *ctrl = serdev->ctrl;
+
+       if (!ctrl || !ctrl->ops->set_tiocm)
+               return -ENOTSUPP;
+
+       return ctrl->ops->set_tiocm(ctrl, set, clear);
+}
+EXPORT_SYMBOL_GPL(serdev_device_set_tiocm);
+
 static int serdev_drv_probe(struct device *dev)
 {
        const struct serdev_device_driver *sdrv = to_serdev_device_driver(dev->driver);

diff --git a/drivers/tty/serdev/serdev-ttyport.c b/drivers/tty/serdev/serdev-ttyport.c
index 50dc75c..487c88f 100644 (file)
--- a/drivers/tty/serdev/serdev-ttyport.c
+++ b/drivers/tty/serdev/serdev-ttyport.c
@@ -176,6 +176,28 @@ static void ttyport_wait_until_sent(struct serdev_controller *ctrl, long timeout
        tty_wait_until_sent(tty, timeout);
 }
 
+static int ttyport_get_tiocm(struct serdev_controller *ctrl)
+{
+       struct serport *serport = serdev_controller_get_drvdata(ctrl);
+       struct tty_struct *tty = serport->tty;
+
+       if (!tty->ops->tiocmget)
+               return -ENOTSUPP;
+
+       return tty->driver->ops->tiocmget(tty);
+}
+
+static int ttyport_set_tiocm(struct serdev_controller *ctrl, unsigned int set, unsigned int clear)
+{
+       struct serport *serport = serdev_controller_get_drvdata(ctrl);
+       struct tty_struct *tty = serport->tty;
+
+       if (!tty->ops->tiocmset)
+               return -ENOTSUPP;
+
+       return tty->driver->ops->tiocmset(tty, set, clear);
+}
+
 static const struct serdev_controller_ops ctrl_ops = {
        .write_buf = ttyport_write_buf,
        .write_flush = ttyport_write_flush,
@@ -185,6 +207,8 @@ static const struct serdev_controller_ops ctrl_ops = {
        .set_flow_control = ttyport_set_flow_control,
        .set_baudrate = ttyport_set_baudrate,
        .wait_until_sent = ttyport_wait_until_sent,
+       .get_tiocm = ttyport_get_tiocm,
+       .set_tiocm = ttyport_set_tiocm,
 };
 
 struct device *serdev_tty_port_register(struct tty_port *port,

diff --git a/include/linux/serdev.h b/include/linux/serdev.h
index a308b20..e29a270 100644 (file)
--- a/include/linux/serdev.h
+++ b/include/linux/serdev.h
@@ -15,6 +15,7 @@
 
 #include <linux/types.h>
 #include <linux/device.h>
+#include <linux/termios.h>
 
 struct serdev_controller;
 struct serdev_device;
@@ -82,6 +83,8 @@ struct serdev_controller_ops {
        void (*set_flow_control)(struct serdev_controller *, bool);
        unsigned int (*set_baudrate)(struct serdev_controller *, unsigned int);
        void (*wait_until_sent)(struct serdev_controller *, long);
+       int (*get_tiocm)(struct serdev_controller *);
+       int (*set_tiocm)(struct serdev_controller *, unsigned int, unsigned int);
 };
 
 /**
@@ -188,6 +191,8 @@ void serdev_device_close(struct serdev_device *);
 unsigned int serdev_device_set_baudrate(struct serdev_device *, unsigned int);
 void serdev_device_set_flow_control(struct serdev_device *, bool);
 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_write_buf(struct serdev_device *, const unsigned char *, size_t);
 void serdev_device_write_flush(struct serdev_device *);
 int serdev_device_write_room(struct serdev_device *);
@@ -226,6 +231,14 @@ static inline unsigned int serdev_device_set_baudrate(struct serdev_device *sdev
 }
 static inline void serdev_device_set_flow_control(struct serdev_device *sdev, bool enable) {}
 static inline void serdev_device_wait_until_sent(struct serdev_device *sdev, long timeout) {}
+static inline int serdev_device_get_tiocm(struct serdev_device *serdev)
+{
+       return -ENOTSUPP;
+}
+static inline int serdev_device_set_tiocm(struct serdev_device *serdev, int set, int clear)
+{
+       return -ENOTSUPP;
+}
 static inline int serdev_device_write_buf(struct serdev_device *sdev, const unsigned char *buf, size_t count)
 {
        return -ENODEV;