netdev - [PATCH net-next v5 09/12] net: pse-pd: pd692x0: Add support for controller and manager power supplies

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Message-Id: <20250218-feature_poe_port_prio-v5-9-3da486e5fd64@bootlin.com>
Date: Tue, 18 Feb 2025 17:19:13 +0100
From: Kory Maincent <kory.maincent@...tlin.com>
To: Andrew Lunn <andrew@...n.ch>, Oleksij Rempel <o.rempel@...gutronix.de>, 
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
 Jonathan Corbet <corbet@....net>, Donald Hunter <donald.hunter@...il.com>, 
 Rob Herring <robh@...nel.org>, Andrew Lunn <andrew+netdev@...n.ch>, 
 Simon Horman <horms@...nel.org>, Heiner Kallweit <hkallweit1@...il.com>, 
 Russell King <linux@...linux.org.uk>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>
Cc: Thomas Petazzoni <thomas.petazzoni@...tlin.com>, netdev@...r.kernel.org, 
 linux-doc@...r.kernel.org, Kyle Swenson <kyle.swenson@....tech>, 
 Dent Project <dentproject@...uxfoundation.org>, kernel@...gutronix.de, 
 Maxime Chevallier <maxime.chevallier@...tlin.com>, 
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 "Kory Maincent (Dent Project)" <kory.maincent@...tlin.com>
Subject: [PATCH net-next v5 09/12] net: pse-pd: pd692x0: Add support for
 controller and manager power supplies

From: Kory Maincent (Dent Project) <kory.maincent@...tlin.com>

Add support for managing the VDD and VDDA power supplies for the PD692x0
PSE controller, as well as the VAUX5 and VAUX3P3 power supplies for the
PD6920x PSE managers.

Signed-off-by: Kory Maincent (Dent Project) <kory.maincent@...tlin.com>
---

Changes in v5:
- New patch
---
 drivers/net/pse-pd/pd692x0.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/drivers/net/pse-pd/pd692x0.c b/drivers/net/pse-pd/pd692x0.c
index 44ded2aa6fca..c9fa60b314ce 100644
--- a/drivers/net/pse-pd/pd692x0.c
+++ b/drivers/net/pse-pd/pd692x0.c
@@ -976,8 +976,10 @@ pd692x0_register_managers_regulator(struct pd692x0_priv *priv,
 	reg_name_len = strlen(dev_name(dev)) + 23;

 	for (i = 0; i < nmanagers; i++) {
+		static const char * const regulators[] = { "vaux5", "vaux3p3" };
 		struct regulator_dev *rdev;
 		char *reg_name;
+		int ret;

 		reg_name = devm_kzalloc(dev, reg_name_len, GFP_KERNEL);
 		if (!reg_name)
@@ -988,6 +990,17 @@ pd692x0_register_managers_regulator(struct pd692x0_priv *priv,
 		if (IS_ERR(rdev))
 			return PTR_ERR(rdev);

+		/* VMAIN is described as main supply for the manager.
+		 * Add other VAUX power supplies and link them to the
+		 * virtual device rdev->dev.
+		 */
+		ret = devm_regulator_bulk_get_enable(&rdev->dev,
+						     ARRAY_SIZE(regulators),
+						     regulators);
+		if (ret)
+			return dev_err_probe(&rdev->dev, ret,
+					     "Failed to enable regulators\n");
+
 		priv->manager_reg[i] = rdev;
 	}

@@ -1640,6 +1653,7 @@ static const struct fw_upload_ops pd692x0_fw_ops = {

 static int pd692x0_i2c_probe(struct i2c_client *client)
 {
+	static const char * const regulators[] = { "vdd", "vdda" };
 	struct pd692x0_msg msg, buf = {0}, zero = {0};
 	struct device *dev = &client->dev;
 	struct pd692x0_msg_ver ver;
@@ -1647,6 +1661,12 @@ static int pd692x0_i2c_probe(struct i2c_client *client)
 	struct fw_upload *fwl;
 	int ret;

+	ret = devm_regulator_bulk_get_enable(dev, ARRAY_SIZE(regulators),
+					     regulators);
+	if (ret)
+		return dev_err_probe(dev, ret,
+				     "Failed to enable regulators\n");
+
 	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
 		dev_err(dev, "i2c check functionality failed\n");
 		return -ENXIO;

-- 
2.34.1