linux-kernel - [PATCH v2 6/9] watchdog: rzv2h_wdt: Make reset controller optional

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Message-ID: <20250729155915.67758-7-prabhakar.mahadev-lad.rj@bp.renesas.com>
Date: Tue, 29 Jul 2025 16:59:12 +0100
From: Prabhakar <prabhakar.csengg@...il.com>
To: Wim Van Sebroeck <wim@...ux-watchdog.org>,
	Guenter Roeck <linux@...ck-us.net>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	Magnus Damm <magnus.damm@...il.com>,
	Wolfram Sang <wsa+renesas@...g-engineering.com>
Cc: linux-watchdog@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-renesas-soc@...r.kernel.org,
	Prabhakar <prabhakar.csengg@...il.com>,
	Biju Das <biju.das.jz@...renesas.com>,
	Fabrizio Castro <fabrizio.castro.jz@...esas.com>,
	Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: [PATCH v2 6/9] watchdog: rzv2h_wdt: Make reset controller optional

From: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>

Use devm_reset_control_get_optional_exclusive() instead of
devm_reset_control_get_exclusive() to allow the driver to operate
on platforms where a reset controller is not present.

This change is in preparation for supporting the RZ/T2H SoC, which
does not have reset.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
---
v1->v2:
- No changes.
---
 drivers/watchdog/rzv2h_wdt.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/watchdog/rzv2h_wdt.c b/drivers/watchdog/rzv2h_wdt.c
index cb584ac5860f..f0e2bf786acc 100644
--- a/drivers/watchdog/rzv2h_wdt.c
+++ b/drivers/watchdog/rzv2h_wdt.c
@@ -240,7 +240,7 @@ static int rzv2h_wdt_probe(struct platform_device *pdev)
 	if (IS_ERR(priv->oscclk))
 		return dev_err_probe(dev, PTR_ERR(priv->oscclk), "no oscclk");
 
-	priv->rstc = devm_reset_control_get_exclusive(dev, NULL);
+	priv->rstc = devm_reset_control_get_optional_exclusive(dev, NULL);
 	if (IS_ERR(priv->rstc))
 		return dev_err_probe(dev, PTR_ERR(priv->rstc),
 				     "failed to get cpg reset");
-- 
2.50.1