linux-kernel - [PATCH 03/17] reset: mchp: sparx5: Release syscon when not use anymore

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Date: Tue, 30 Apr 2024 10:37:12 +0200
From: Herve Codina <herve.codina@...tlin.com>
To: Herve Codina <herve.codina@...tlin.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Lee Jones <lee@...nel.org>,
	Arnd Bergmann <arnd@...db.de>,
	Horatiu Vultur <horatiu.vultur@...rochip.com>,
	UNGLinuxDriver@...rochip.com,
	Andrew Lunn <andrew@...n.ch>,
	Heiner Kallweit <hkallweit1@...il.com>,
	Russell King <linux@...linux.org.uk>,
	Saravana Kannan <saravanak@...gle.com>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	Lars Povlsen <lars.povlsen@...rochip.com>,
	Steen Hegelund <Steen.Hegelund@...rochip.com>,
	Daniel Machon <daniel.machon@...rochip.com>,
	Alexandre Belloni <alexandre.belloni@...tlin.com>
Cc: linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org,
	netdev@...r.kernel.org,
	linux-pci@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	Allan Nielsen <allan.nielsen@...rochip.com>,
	Steen Hegelund <steen.hegelund@...rochip.com>,
	Luca Ceresoli <luca.ceresoli@...tlin.com>,
	Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
	Clément Léger <clement.leger@...tlin.com>
Subject: [PATCH 03/17] reset: mchp: sparx5: Release syscon when not use anymore

From: Clément Léger <clement.leger@...tlin.com>

The sparx5 reset controller does not release syscon when it is not used
anymore.

This reset controller is used by the LAN966x PCI device driver.
It can be removed from the system at runtime and needs to release its
consumed syscon on removal.

Use the newly introduced devm_syscon_regmap_lookup_by_phandle() in order
to get the syscon and automatically release it on removal.

Signed-off-by: Clément Léger <clement.leger@...tlin.com>
Signed-off-by: Herve Codina <herve.codina@...tlin.com>
---
 drivers/reset/reset-microchip-sparx5.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/drivers/reset/reset-microchip-sparx5.c b/drivers/reset/reset-microchip-sparx5.c
index 69915c7b4941..c4fe65291a43 100644
--- a/drivers/reset/reset-microchip-sparx5.c
+++ b/drivers/reset/reset-microchip-sparx5.c
@@ -65,15 +65,11 @@ static const struct reset_control_ops sparx5_reset_ops = {
 static int mchp_sparx5_map_syscon(struct platform_device *pdev, char *name,
 				  struct regmap **target)
 {
-	struct device_node *syscon_np;
+	struct device *dev = &pdev->dev;
 	struct regmap *regmap;
 	int err;
 
-	syscon_np = of_parse_phandle(pdev->dev.of_node, name, 0);
-	if (!syscon_np)
-		return -ENODEV;
-	regmap = syscon_node_to_regmap(syscon_np);
-	of_node_put(syscon_np);
+	regmap = devm_syscon_regmap_lookup_by_phandle(dev, dev->of_node, name);
 	if (IS_ERR(regmap)) {
 		err = PTR_ERR(regmap);
 		dev_err(&pdev->dev, "No '%s' map: %d\n", name, err);
-- 
2.44.0