linux-kernel - [PATCH v2 08/10] clk: en7523: add support for probing SCU child

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Message-ID: <20250617130455.32682-9-ansuelsmth@gmail.com>
Date: Tue, 17 Jun 2025 15:04:51 +0200
From: Christian Marangi <ansuelsmth@...il.com>
To: Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	Felix Fietkau <nbd@....name>,
	linux-clk@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: Christian Marangi <ansuelsmth@...il.com>
Subject: [PATCH v2 08/10] clk: en7523: add support for probing SCU child

On new Airoha SoC in the SCU register space additional pheriperal might
be present aside from the clock/reset. The Airoha AN7583 SoC is an
example of this where 2 MDIO controller are present.

Introduce a bool "probe_child" to trigger probe of child node of the SCU
node.

Signed-off-by: Christian Marangi <ansuelsmth@...il.com>
---
 drivers/clk/clk-en7523.c | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/drivers/clk/clk-en7523.c b/drivers/clk/clk-en7523.c
index 5236119bca83..00c80221a274 100644
--- a/drivers/clk/clk-en7523.c
+++ b/drivers/clk/clk-en7523.c
@@ -5,6 +5,7 @@
 #include <linux/clk-provider.h>
 #include <linux/io.h>
 #include <linux/mfd/syscon.h>
+#include <linux/of_platform.h>
 #include <linux/platform_device.h>
 #include <linux/property.h>
 #include <linux/regmap.h>
@@ -83,6 +84,7 @@ struct en_rst_data {
 };
 
 struct en_clk_soc_data {
+	bool probe_child;
 	u32 num_clocks;
 	const struct en_clk_desc *base_clks;
 	const struct clk_ops pcie_ops;
@@ -900,8 +902,19 @@ static int en7523_clk_probe(struct platform_device *pdev)
 	if (err)
 		return err;
 
-	return of_clk_add_hw_provider(dev->of_node, of_clk_hw_onecell_get,
-				      clk_data);
+	err = of_clk_add_hw_provider(dev->of_node, of_clk_hw_onecell_get,
+				     clk_data);
+	if (err)
+		return err;
+
+	if (soc_data->probe_child) {
+		err = of_platform_populate(dev->of_node, NULL, NULL,
+					   dev);
+		if (err)
+			return err;
+	}
+
+	return 0;
 }
 
 static const struct en_clk_soc_data en7523_data = {
-- 
2.48.1