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Message-ID: <20250804195723.3963524-4-prabhakar.mahadev-lad.rj@bp.renesas.com>
Date: Mon, 4 Aug 2025 20:57:20 +0100
From: Prabhakar <prabhakar.csengg@...il.com>
To: Wim Van Sebroeck <wim@...ux-watchdog.org>,
Guenter Roeck <linux@...ck-us.net>,
Geert Uytterhoeven <geert+renesas@...der.be>,
Wolfram Sang <wsa+renesas@...g-engineering.com>,
Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Philipp Zabel <p.zabel@...gutronix.de>,
Magnus Damm <magnus.damm@...il.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 v3 3/6] watchdog: rzv2h: Make "oscclk" and reset controller optional
From: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Update the rzv2h_wdt driver to make the "oscclk" clock and reset
controller optional.
Use devm_clk_get_optional_prepared() to obtain the "oscclk" clock,
allowing the driver to work on platforms that do not provide this clock,
such as the RZ/T2H SoC.
Similarly, use devm_reset_control_get_optional_exclusive() to allow the
driver to function on platforms that lack a reset controller.
These changes are preparatory steps for supporting the RZ/T2H SoC, which
does not provide an "oscclk" clock or a reset controller.
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Reviewed-by: Wolfram Sang <wsa+renesas@...g-engineering.com>
---
v2->v3:
- Merged with the patch "watchdog: rzv2h_wdt: Make reset controller optional"
- Updated commit message to clarify that both "oscclk" and reset controller
are made optional.
- Added reviewed-by from Wolfram.
v1->v2:
- No changes.
---
drivers/watchdog/rzv2h_wdt.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/watchdog/rzv2h_wdt.c b/drivers/watchdog/rzv2h_wdt.c
index 755067800ebb..3c02960b65cf 100644
--- a/drivers/watchdog/rzv2h_wdt.c
+++ b/drivers/watchdog/rzv2h_wdt.c
@@ -230,11 +230,11 @@ 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");
- 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
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