[PATCH v2 06/16] rpmsg: add helper to register the rpmsg ctrl device

Arnaud Pouliquen
2020-12-22T10:59:48Z

This function registers a rpmsg_ctl device and its associated
/dev/rpmsg_ctrl interface.

Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
---
drivers/rpmsg/rpmsg_ctrl.c | 16 ++++++++++++++++
include/linux/rpmsg.h | 7 +++++++
2 files changed, 23 insertions(+)

diff --git a/drivers/rpmsg/rpmsg_ctrl.c b/drivers/rpmsg/rpmsg_ctrl.c
index 8381b5b2b794..e4b0ca6dffe3 100644
--- a/drivers/rpmsg/rpmsg_ctrl.c
+++ b/drivers/rpmsg/rpmsg_ctrl.c
@@ -271,6 +271,22 @@ void rpmsg_ctrl_unregister_ctl(const struct rpmsg_drv_ctrl_info *ctrl)
}
EXPORT_SYMBOL(rpmsg_ctrl_unregister_ctl);

+/**
+ * rpmsg_ctl_register_device() - register control device based on rpdev
+ * @rpdev: prepared rpdev to be used for creating endpoints
+ *
+ * This function wraps rpmsg_register_device() preparing the rpdev for use as
+ * a control rpmsg driver forcing the channel name.
+ */
+int rpmsg_ctl_register_device(struct rpmsg_device *rpdev)
+{
+ strcpy(rpdev->id.name, KBUILD_MODNAME);
+ rpdev->driver_override = KBUILD_MODNAME;
+
+ return rpmsg_register_device(rpdev);
+}
+EXPORT_SYMBOL(rpmsg_ctl_register_device);
+
static int rpmsg_ctrl_init(void)
{
int ret;
diff --git a/include/linux/rpmsg.h b/include/linux/rpmsg.h
index 5681c585e235..86540528325f 100644
--- a/include/linux/rpmsg.h
+++ b/include/linux/rpmsg.h
@@ -335,6 +335,8 @@ static inline __poll_t rpmsg_poll(struct rpmsg_endpoint *ept,
int rpmsg_ctrl_register_ctl(const struct rpmsg_drv_ctrl_info *ctrl);
void rpmsg_ctrl_unregister_ctl(const struct rpmsg_drv_ctrl_info *ctrl);

+int rpmsg_ctl_register_device(struct rpmsg_device *rpdev);
+
#else

static inline int rpmsg_ctrl_register_ctl(const struct rpmsg_drv_ctrl_info *ctrl)
@@ -346,6 +348,11 @@ static inline void rpmsg_ctrl_unregister_ctl(const struct rpmsg_drv_ctrl_info *c
{
}

+static inline int rpmsg_ctl_register_device(struct rpmsg_device *rpdev)
+{
+ return 0;
+}
+
#endif /* IS_ENABLED(CONFIG_RPMSG_CTRL) */

#endif /* _LINUX_RPMSG_H */
--
2.17.1