/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __LINUX_EXTCON_INTERNAL_H__ #define __LINUX_EXTCON_INTERNAL_H__ #include <linux/extcon-provider.h> /** * struct extcon_dev - An extcon device represents one external connector. * @name: The name of this extcon device. Parent device name is * used if NULL. * @supported_cable: Array of supported cable names ending with EXTCON_NONE. * If supported_cable is NULL, cable name related APIs * are disabled. * @mutually_exclusive: Array of mutually exclusive set of cables that cannot * be attached simultaneously. The array should be * ending with NULL or be NULL (no mutually exclusive * cables). For example, if it is { 0x7, 0x30, 0}, then, * {0, 1}, {0, 1, 2}, {0, 2}, {1, 2}, or {4, 5} cannot * be attached simulataneously. {0x7, 0} is equivalent to * {0x3, 0x6, 0x5, 0}. If it is {0xFFFFFFFF, 0}, there * can be no simultaneous connections. * @dev: Device of this extcon. * @state: Attach/detach state of this extcon. Do not provide at * register-time. * @nh_all: Notifier for the state change events for all supported * external connectors from this extcon. * @nh: Notifier for the state change events from this extcon * @entry: To support list of extcon devices so that users can * search for extcon devices based on the extcon name. * @lock: * @max_supported: Internal value to store the number of cables. * @extcon_dev_type: Device_type struct to provide attribute_groups * customized for each extcon device. * @cables: Sysfs subdirectories. Each represents one cable. * * In most cases, users only need to provide "User initializing data" of * this struct when registering an extcon. In some exceptional cases, * optional callbacks may be needed. However, the values in "internal data" * are overwritten by register function. */ struct extcon_dev { /* Optional user initializing data */ const char *name; const unsigned int *supported_cable; const u32 *mutually_exclusive; /* Internal data. Please do not set. */ struct device dev; struct raw_notifier_head nh_all; struct raw_notifier_head *nh; struct list_head entry; int max_supported; spinlock_t lock; /* could be called by irq handler */ u32 state; /* /sys/class/extcon/.../cable.n/... */ struct device_type extcon_dev_type; struct extcon_cable *cables; /* /sys/class/extcon/.../mutually_exclusive/... */ struct attribute_group attr_g_muex; struct attribute **attrs_muex; struct device_attribute *d_attrs_muex; }; #endif /* __LINUX_EXTCON_INTERNAL_H__ */