/* 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__ */
|
