linux-kernel - [PATCH 7/8] soc: renesas: don't access of

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Message-Id: <20260119-soc-of-root-v1-7-32a0fa9a78b4@oss.qualcomm.com>
Date: Mon, 19 Jan 2026 11:40:18 +0100
From: Bartosz Golaszewski <bartosz.golaszewski@....qualcomm.com>
To: Rob Herring <robh@...nel.org>, Saravana Kannan <saravanak@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Danilo Krummrich <dakr@...nel.org>,
        "Christophe Leroy (CS GROUP)" <chleroy@...nel.org>,
        Shawn Guo <shawnguo@...nel.org>, Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Magnus Damm <magnus.damm@...il.com>, Chen-Yu Tsai <wens@...nel.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Samuel Holland <samuel@...lland.org>
Cc: devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, linux-arm-kernel@...ts.infradead.org,
        imx@...ts.linux.dev, linux-renesas-soc@...r.kernel.org,
        linux-sunxi@...ts.linux.dev,
        Bartosz Golaszewski <bartosz.golaszewski@....qualcomm.com>
Subject: [PATCH 7/8] 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@...nel.org>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@....qualcomm.com>
---
 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 ee4f17bb4db45db7b96c782b770e5bb4eb139e09..7c54b39b9cdc6b070a7cb6c1c03cc1356bbf0309 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);
 	if (!match)
 		return -ENODEV;
 

-- 
2.47.3