Re: [PATCH v2 8/9] soc: renesas: don't access of_root directly

Don't access of_root directly as it reduces the build test coverage for
this driver with COMPILE_TEST=y and OF=n. Use existing helper functions
to retrieve the relevant information.

Suggested-by: Rob Herring <robh@kernel.org>
Signed-off-by: Bartosz Golaszewski <redacted>
---
 drivers/soc/renesas/renesas-soc.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/soc/renesas/renesas-soc.c b/drivers/soc/renesas/renesas-soc.c
index 38ff0b823bdaf1ba106bfb57ed423158d9103f8d..bd8ba0ac30fa91fcf2a10edd0d58b064650085cf 100644
--- a/drivers/soc/renesas/renesas-soc.c
+++ b/drivers/soc/renesas/renesas-soc.c

@@ -6,6 +6,7 @@
  */
 
 #include <linux/bitfield.h>
+#include <linux/cleanup.h>
 #include <linux/io.h>
 #include <linux/of.h>
 #include <linux/of_address.h>

@@ -468,7 +469,11 @@ static int __init renesas_soc_init(void)
 	const char *soc_id;
 	int ret;
 
-	match = of_match_node(renesas_socs, of_root);
+	struct device_node *root __free(device_node) = of_find_node_by_path("/");
+	if (!root)
+		return -ENOENT;
+
+	match = of_match_node(renesas_socs, root);