driver: rewrite dev_printf as a function

Printing device context normally should be "driver instance:",
but instead we printed the device name twice. This patch fixes
this and as a bonus makes the binary a bit smaller. Instead of
a '@' between driver and instance this function now prints a
whitespace which is a bit more like Linux.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 19 insertions, 0 deletions

diff --git a/drivers/base/driver.c b/drivers/base/driver.c
index 6cd428681f..47d3803035 100644
--- a/drivers/base/driver.c
+++ b/drivers/base/driver.c
@@ -313,6 +313,25 @@ const char *dev_id(const struct device_d *dev)
 	return buf;
 }
 
+int dev_printf(const struct device_d *dev, const char *format, ...)
+{
+	va_list args;
+	int ret = 0;
+
+	if (dev->driver && dev->driver->name)
+		ret += printf("%s ", dev->driver->name);
+
+	ret += printf("%s: ", dev_name(dev));
+
+	va_start(args, format);
+
+	ret += vprintf(format, args);
+
+	va_end(args);
+
+	return ret;
+}
+
 void devices_shutdown(void)
 {
 	struct device_d *dev;