linux-kernel - [PATCH v2 4/9] watchdog: rzv2h_wdt: Make "oscclk" an optional clock

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Message-ID: <20250729155915.67758-5-prabhakar.mahadev-lad.rj@bp.renesas.com>
Date: Tue, 29 Jul 2025 16:59:10 +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 4/9] watchdog: rzv2h_wdt: Make "oscclk" an optional clock

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

Update the driver to obtain the "oscclk" clock using
devm_clk_get_optional_prepared() instead of devm_clk_get_prepared().
This allows the driver to handle cases where the "oscclk" clock is not
present in the hardware or device tree.

This change is in preparation for adding support for the RZ/T2H SoC,
which does not provide the "oscclk" clock.

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 c2f39dd56687..baf9d64510b9 100644
--- a/drivers/watchdog/rzv2h_wdt.c
+++ b/drivers/watchdog/rzv2h_wdt.c
@@ -229,7 +229,7 @@ static int rzv2h_wdt_probe(struct platform_device *pdev)
 	if (IS_ERR(priv->pclk))
 		return dev_err_probe(dev, PTR_ERR(priv->pclk), "no pclk");
 
-	priv->oscclk = devm_clk_get_prepared(dev, "oscclk");
+	priv->oscclk = devm_clk_get_optional_prepared(dev, "oscclk");
 	if (IS_ERR(priv->oscclk))
 		return dev_err_probe(dev, PTR_ERR(priv->oscclk), "no oscclk");
 
-- 
2.50.1