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Release 4.14 drivers/extcon/extcon.h

Directory: drivers/extcon
/* SPDX-License-Identifier: GPL-2.0 */


#include <linux/extcon.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__ */

Overall Contributors

Chanwoo Choi8998.89%266.67%
Greg Kroah-Hartman11.11%133.33%
Directory: drivers/extcon
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