linux-kernel - [PATCH 1/1] pwm: Add support for pwm nexus dt bindings

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Message-ID: <20241202164459.157672-1-herve.codina@bootlin.com>
Date: Mon,  2 Dec 2024 17:44:59 +0100
From: Herve Codina <herve.codina@...tlin.com>
To: Uwe Kleine-König <ukleinek@...nel.org>
Cc: Rob Herring <robh@...nel.org>,
	Saravana Kannan <saravanak@...gle.com>,
	linux-pwm@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Luca Ceresoli <luca.ceresoli@...tlin.com>,
	Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
	Herve Codina <herve.codina@...tlin.com>
Subject: [PATCH 1/1] pwm: Add support for pwm nexus dt bindings

Platforms can have a standardized connector/expansion slot that exposes
signals like PWMs to expansion boards in an SoC agnostic way.

The support for nexus node [1] has been added to handle those cases in
commit bd6f2fd5a1d5 ("of: Support parsing phandle argument lists through
a nexus node") and the gpio subsystem adopted the support in commit
c11e6f0f04db ("gpio: Support gpio nexus dt bindings")

Add support for nexus node dt binding in the pwm subsystem.

[1] https://github.com/devicetree-org/devicetree-specification/blob/v0.4/source/chapter2-devicetree-basics.rst#nexus-nodes-and-specifier-mapping

Signed-off-by: Herve Codina <herve.codina@...tlin.com>
---
 drivers/pwm/core.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c
index 9c733877e98e..4a7454841cef 100644
--- a/drivers/pwm/core.c
+++ b/drivers/pwm/core.c
@@ -1707,8 +1707,7 @@ static struct pwm_device *of_pwm_get(struct device *dev, struct device_node *np,
 			return ERR_PTR(index);
 	}
 
-	err = of_parse_phandle_with_args(np, "pwms", "#pwm-cells", index,
-					 &args);
+	err = of_parse_phandle_with_args_map(np, "pwms", "pwm", index, &args);
 	if (err) {
 		pr_err("%s(): can't parse \"pwms\" property\n", __func__);
 		return ERR_PTR(err);
-- 
2.47.0