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/*
* Google LWIS I2C Bus Manager
*
* Copyright (c) 2023 Google, LLC
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#define pr_fmt(fmt) KBUILD_MODNAME "-i2c-sched: " fmt
#include "lwis_i2c_sched.h"
#include "lwis_i2c_bus_manager.h"
/*
* lwis_i2c_process_request_queue_is_empty:
* Checks if the I2C process request queue is empty
*/
bool lwis_i2c_process_request_queue_is_empty(struct lwis_i2c_process_queue *process_queue)
{
if ((!process_queue) || ((process_queue) && (process_queue->number_of_nodes == 0))) {
return true;
}
return false;
}
/*
* lwis_i2c_process_request_queue_initialize:
* Initializes the I2C process request queue for a given I2C Bus
*/
void lwis_i2c_process_request_queue_initialize(struct lwis_i2c_process_queue *process_queue)
{
process_queue->number_of_nodes = 0;
INIT_LIST_HEAD(&process_queue->head);
}
/*
* lwis_i2c_process_request_queue_destroy:
* Frees all the requests in the queue
*/
void lwis_i2c_process_request_queue_destroy(struct lwis_i2c_process_queue *process_queue)
{
struct list_head *request;
struct list_head *request_tmp;
struct lwis_i2c_process_request *process_request;
if (!process_queue)
return;
if (lwis_i2c_process_request_queue_is_empty(process_queue))
return;
list_for_each_safe (request, request_tmp, &process_queue->head) {
process_request =
list_entry(request, struct lwis_i2c_process_request, request_node);
list_del(&process_request->request_node);
process_request->requesting_client = NULL;
kfree(process_request);
process_request = NULL;
--process_queue->number_of_nodes;
}
}
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