// SPDX-License-Identifier: GPL-2.0-only // // Framework for Ethernet Power Sourcing Equipment // // Copyright (c) 2022 Pengutronix, Oleksij Rempel <[email protected]> // #include <linux/device.h> #include <linux/of.h> #include <linux/pse-pd/pse.h> #include <linux/regulator/driver.h> #include <linux/regulator/machine.h> static DEFINE_MUTEX(pse_list_mutex); static LIST_HEAD(pse_controller_list); /** * struct pse_control - a PSE control * @pcdev: a pointer to the PSE controller device * this PSE control belongs to * @ps: PSE PI supply of the PSE control * @list: list entry for the pcdev's PSE controller list * @id: ID of the PSE line in the PSE controller device * @refcnt: Number of gets of this pse_control */ struct pse_control { … }; static int of_load_single_pse_pi_pairset(struct device_node *node, struct pse_pi *pi, int pairset_num) { … } /** * of_load_pse_pi_pairsets - load PSE PI pairsets pinout and polarity * @node: a pointer of the device node * @pi: a pointer of the PSE PI to fill * @npairsets: the number of pairsets (1 or 2) used by the PI * * Return: 0 on success and failure value on error */ static int of_load_pse_pi_pairsets(struct device_node *node, struct pse_pi *pi, int npairsets) { … } static void pse_release_pis(struct pse_controller_dev *pcdev) { … } /** * of_load_pse_pis - load all the PSE PIs * @pcdev: a pointer to the PSE controller device * * Return: 0 on success and failure value on error */ static int of_load_pse_pis(struct pse_controller_dev *pcdev) { … } static int pse_pi_is_enabled(struct regulator_dev *rdev) { … } static int pse_pi_enable(struct regulator_dev *rdev) { … } static int pse_pi_disable(struct regulator_dev *rdev) { … } static int _pse_pi_get_voltage(struct regulator_dev *rdev) { … } static int pse_pi_get_voltage(struct regulator_dev *rdev) { … } static int _pse_ethtool_get_status(struct pse_controller_dev *pcdev, int id, struct netlink_ext_ack *extack, struct pse_control_status *status); static int pse_pi_get_current_limit(struct regulator_dev *rdev) { … } static int pse_pi_set_current_limit(struct regulator_dev *rdev, int min_uA, int max_uA) { … } static const struct regulator_ops pse_pi_ops = …; static int devm_pse_pi_regulator_register(struct pse_controller_dev *pcdev, char *name, int id) { … } /** * pse_controller_register - register a PSE controller device * @pcdev: a pointer to the initialized PSE controller device * * Return: 0 on success and failure value on error */ int pse_controller_register(struct pse_controller_dev *pcdev) { … } EXPORT_SYMBOL_GPL(…); /** * pse_controller_unregister - unregister a PSE controller device * @pcdev: a pointer to the PSE controller device */ void pse_controller_unregister(struct pse_controller_dev *pcdev) { … } EXPORT_SYMBOL_GPL(…); static void devm_pse_controller_release(struct device *dev, void *res) { … } /** * devm_pse_controller_register - resource managed pse_controller_register() * @dev: device that is registering this PSE controller * @pcdev: a pointer to the initialized PSE controller device * * Managed pse_controller_register(). For PSE controllers registered by * this function, pse_controller_unregister() is automatically called on * driver detach. See pse_controller_register() for more information. * * Return: 0 on success and failure value on error */ int devm_pse_controller_register(struct device *dev, struct pse_controller_dev *pcdev) { … } EXPORT_SYMBOL_GPL(…); /* PSE control section */ static void __pse_control_release(struct kref *kref) { … } static void __pse_control_put_internal(struct pse_control *psec) { … } /** * pse_control_put - free the PSE control * @psec: PSE control pointer */ void pse_control_put(struct pse_control *psec) { … } EXPORT_SYMBOL_GPL(…); static struct pse_control * pse_control_get_internal(struct pse_controller_dev *pcdev, unsigned int index) { … } /** * of_pse_match_pi - Find the PSE PI id matching the device node phandle * @pcdev: a pointer to the PSE controller device * @np: a pointer to the device node * * Return: id of the PSE PI, -EINVAL if not found */ static int of_pse_match_pi(struct pse_controller_dev *pcdev, struct device_node *np) { … } /** * psec_id_xlate - translate pse_spec to the PSE line number according * to the number of pse-cells in case of no pse_pi node * @pcdev: a pointer to the PSE controller device * @pse_spec: PSE line specifier as found in the device tree * * Return: 0 if #pse-cells = <0>. Return PSE line number otherwise. */ static int psec_id_xlate(struct pse_controller_dev *pcdev, const struct of_phandle_args *pse_spec) { … } struct pse_control *of_pse_control_get(struct device_node *node) { … } EXPORT_SYMBOL_GPL(…); static int _pse_ethtool_get_status(struct pse_controller_dev *pcdev, int id, struct netlink_ext_ack *extack, struct pse_control_status *status) { … } /** * pse_ethtool_get_status - get status of PSE control * @psec: PSE control pointer * @extack: extack for reporting useful error messages * @status: struct to store PSE status * * Return: 0 on success and failure value on error */ int pse_ethtool_get_status(struct pse_control *psec, struct netlink_ext_ack *extack, struct pse_control_status *status) { … } EXPORT_SYMBOL_GPL(…); static int pse_ethtool_c33_set_config(struct pse_control *psec, const struct pse_control_config *config) { … } static int pse_ethtool_podl_set_config(struct pse_control *psec, const struct pse_control_config *config) { … } /** * pse_ethtool_set_config - set PSE control configuration * @psec: PSE control pointer * @extack: extack for reporting useful error messages * @config: Configuration of the test to run * * Return: 0 on success and failure value on error */ int pse_ethtool_set_config(struct pse_control *psec, struct netlink_ext_ack *extack, const struct pse_control_config *config) { … } EXPORT_SYMBOL_GPL(…); /** * pse_ethtool_set_pw_limit - set PSE control power limit * @psec: PSE control pointer * @extack: extack for reporting useful error messages * @pw_limit: power limit value in mW * * Return: 0 on success and failure value on error */ int pse_ethtool_set_pw_limit(struct pse_control *psec, struct netlink_ext_ack *extack, const unsigned int pw_limit) { … } EXPORT_SYMBOL_GPL(…); bool pse_has_podl(struct pse_control *psec) { … } EXPORT_SYMBOL_GPL(…); bool pse_has_c33(struct pse_control *psec) { … } EXPORT_SYMBOL_GPL(…);
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