75052a5504
A bundle has a state file, that is managed by the endo userspace process. This file can be written to and any process that is polling on the file will be woken up and can read the new value. It's a "cheap" IPC for programs that are not allowed to do anything other than read/write to kernel sysfs files. Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
46 lines
1.1 KiB
C
46 lines
1.1 KiB
C
/*
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* Greybus bundles
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*
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* Copyright 2014 Google Inc.
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* Copyright 2014 Linaro Ltd.
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*
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* Released under the GPLv2 only.
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*/
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#ifndef __BUNDLE_H
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#define __BUNDLE_H
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#include <linux/list.h>
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/* Greybus "public" definitions" */
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struct gb_bundle {
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struct device dev;
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struct gb_interface *intf;
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u8 id;
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u8 class;
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u8 device_id;
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struct list_head connections;
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u8 *state;
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struct list_head links; /* interface->bundles */
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};
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#define to_gb_bundle(d) container_of(d, struct gb_bundle, dev)
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#define GB_DEVICE_ID_BAD 0xff
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/* Greybus "private" definitions" */
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struct gb_bundle *gb_bundle_create(struct gb_interface *intf, u8 bundle_id,
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u8 class);
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void gb_bundle_destroy(struct gb_interface *intf);
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int gb_bundle_init(struct gb_bundle *bundle, u8 device_id);
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int gb_bundles_init(struct gb_interface *intf, u8 device_id);
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struct gb_bundle *gb_bundle_find(struct gb_interface *intf, u8 bundle_id);
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void gb_bundle_bind_protocols(void);
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const struct greybus_bundle_id *
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gb_bundle_match_id(struct gb_bundle *bundle,
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const struct greybus_bundle_id *id);
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#endif /* __BUNDLE_H */
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