1 // SPDX-License-Identifier: GPL-2.0-only
3 // Driver for the regulator based Ethernet Power Sourcing Equipment, without
4 // auto classification support.
6 // Copyright (c) 2022 Pengutronix, Oleksij Rempel <kernel@pengutronix.de>
9 #include <linux/module.h>
11 #include <linux/platform_device.h>
12 #include <linux/pse-pd/pse.h>
13 #include <linux/regulator/consumer.h>
16 struct pse_controller_dev pcdev;
17 struct regulator *ps; /*power source */
18 enum ethtool_podl_pse_admin_state admin_state;
21 static struct pse_reg_priv *to_pse_reg(struct pse_controller_dev *pcdev)
23 return container_of(pcdev, struct pse_reg_priv, pcdev);
27 pse_reg_ethtool_set_config(struct pse_controller_dev *pcdev, unsigned long id,
28 struct netlink_ext_ack *extack,
29 const struct pse_control_config *config)
31 struct pse_reg_priv *priv = to_pse_reg(pcdev);
34 if (priv->admin_state == config->admin_cotrol)
37 switch (config->admin_cotrol) {
38 case ETHTOOL_PODL_PSE_ADMIN_STATE_ENABLED:
39 ret = regulator_enable(priv->ps);
41 case ETHTOOL_PODL_PSE_ADMIN_STATE_DISABLED:
42 ret = regulator_disable(priv->ps);
45 dev_err(pcdev->dev, "Unknown admin state %i\n",
46 config->admin_cotrol);
53 priv->admin_state = config->admin_cotrol;
59 pse_reg_ethtool_get_status(struct pse_controller_dev *pcdev, unsigned long id,
60 struct netlink_ext_ack *extack,
61 struct pse_control_status *status)
63 struct pse_reg_priv *priv = to_pse_reg(pcdev);
66 ret = regulator_is_enabled(priv->ps);
71 status->podl_pw_status = ETHTOOL_PODL_PSE_PW_D_STATUS_DISABLED;
73 status->podl_pw_status =
74 ETHTOOL_PODL_PSE_PW_D_STATUS_DELIVERING;
76 status->podl_admin_state = priv->admin_state;
81 static const struct pse_controller_ops pse_reg_ops = {
82 .ethtool_get_status = pse_reg_ethtool_get_status,
83 .ethtool_set_config = pse_reg_ethtool_set_config,
87 pse_reg_probe(struct platform_device *pdev)
89 struct device *dev = &pdev->dev;
90 struct pse_reg_priv *priv;
93 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
97 if (!pdev->dev.of_node)
100 priv->ps = devm_regulator_get_exclusive(dev, "pse");
101 if (IS_ERR(priv->ps))
102 return dev_err_probe(dev, PTR_ERR(priv->ps),
103 "failed to get PSE regulator.\n");
105 platform_set_drvdata(pdev, priv);
107 ret = regulator_is_enabled(priv->ps);
112 priv->admin_state = ETHTOOL_PODL_PSE_ADMIN_STATE_ENABLED;
114 priv->admin_state = ETHTOOL_PODL_PSE_ADMIN_STATE_DISABLED;
116 priv->pcdev.owner = THIS_MODULE;
117 priv->pcdev.ops = &pse_reg_ops;
118 priv->pcdev.dev = dev;
119 ret = devm_pse_controller_register(dev, &priv->pcdev);
121 dev_err(dev, "failed to register PSE controller (%pe)\n",
129 static const __maybe_unused struct of_device_id pse_reg_of_match[] = {
130 { .compatible = "podl-pse-regulator", },
133 MODULE_DEVICE_TABLE(of, pse_reg_of_match);
135 static struct platform_driver pse_reg_driver = {
136 .probe = pse_reg_probe,
138 .name = "PSE regulator",
139 .of_match_table = of_match_ptr(pse_reg_of_match),
142 module_platform_driver(pse_reg_driver);
144 MODULE_AUTHOR("Oleksij Rempel <kernel@pengutronix.de>");
145 MODULE_DESCRIPTION("regulator based Ethernet Power Sourcing Equipment");
146 MODULE_LICENSE("GPL v2");
147 MODULE_ALIAS("platform:pse-regulator");