[PATCH 2/2] console: implement of_console_by_stdout_path helper

[Ahmad Fatoum <a.fatoum@pengutronix.de>]

Board code may want to get a handle on the standard console to disable
or enable some of its stream. Add a helper function for that.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
 common/console.c  | 17 +++++++++++++++++
 include/console.h |  1 +
 2 files changed, 18 insertions(+)

diff --git a/common/console.c b/common/console.c
index 768550eb7df9..7e43a9b5fc0e 100644
--- a/common/console.c
+++ b/common/console.c
@@ -254,6 +254,23 @@ static void console_set_stdoutpath(struct console_device *cdev, unsigned baudrat
 	free(str);
 }
 
+struct console_device *of_console_by_stdout_path(void)
+{
+	struct console_device *console;
+	struct device_node *stdout_np;
+
+	stdout_np = of_get_stdoutpath(NULL);
+	if (!stdout_np)
+		return NULL;
+
+	for_each_console(console) {
+		if (dev_of_node(console->dev) == stdout_np)
+			return console;
+	}
+
+	return NULL;
+}
+
 static int __console_puts(struct console_device *cdev, const char *s,
 			  size_t nbytes)
 {
diff --git a/include/console.h b/include/console.h
index d3b08722b01a..586b68f73301 100644
--- a/include/console.h
+++ b/include/console.h
@@ -109,6 +109,7 @@ unsigned console_get_active(struct console_device *cdev);
 int console_set_baudrate(struct console_device *cdev, unsigned baudrate);
 unsigned console_get_baudrate(struct console_device *cdev);
 
+struct console_device *of_console_by_stdout_path(void);
 
 /**
  * console_fifo_fill - fill FIFO with as much console data as possible
-- 
2.39.2