69 lines
1.5 KiB
C
69 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/* Copyright (C) 2019 Samsung Electronics
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*/
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#if IS_ENABLED(CONFIG_HALL_NOTIFIER)
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#include <linux/hall/hall_ic_notifier.h>
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#include <linux/module.h>
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static struct hall_notifier_context hall_notifier;
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static struct blocking_notifier_head hall_nb_head = BLOCKING_NOTIFIER_INIT(hall_nb_head);
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int hall_notifier_register(struct notifier_block *n)
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{
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int ret = 0;
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pr_info("%s\n", __func__);
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ret = blocking_notifier_chain_register(&hall_nb_head, n);
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if (ret < 0)
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pr_err("%s: failed(%d)\n", __func__, ret);
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return ret;
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}
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EXPORT_SYMBOL(hall_notifier_register);
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int hall_notifier_unregister(struct notifier_block *nb)
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{
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int ret = 0;
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pr_info("%s\n", __func__);
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ret = blocking_notifier_chain_unregister(&hall_nb_head, nb);
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if (ret < 0)
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pr_err("%s: failed(%d)\n", __func__, ret);
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return ret;
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}
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EXPORT_SYMBOL(hall_notifier_unregister);
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int hall_notifier_notify(const char *hall_name, int hall_value)
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{
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int ret = 0;
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pr_info("%s: name: %s value: %d\n", __func__, hall_name, hall_value);
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hall_notifier.name = hall_name;
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hall_notifier.value = hall_value;
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ret = blocking_notifier_call_chain(&hall_nb_head, hall_value, &hall_notifier);
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switch (ret) {
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case NOTIFY_DONE:
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case NOTIFY_OK:
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pr_info("%s done(0x%x)\n", __func__, ret);
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break;
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default:
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pr_info("%s failed(0x%x)\n", __func__, ret);
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break;
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}
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return ret;
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}
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EXPORT_SYMBOL(hall_notifier_notify);
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("Hall IC notifier");
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#endif /* if IS_ENABLED(CONFIG_HALL_NOTIFIER) */
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