e29493c71d
Use #if IS_ENABLED() instead of #ifdef for configurations as vendor module guidelines. Use #if IS_ENABLED(CONFIG_XXX) instead of #ifdef CONFIG_XXX to ensure that the code inside the #if block continues to compile if the config changes to a tristate config in the future. The differences are as follows: 1.#if IS_ENABLED(CONFIG_XXX) evaluates to true when CONFIG_XXX is set to module (=m) or built-in (=y). 2.#ifdef CONFIG_XXX evaluates to true when CONFIG_XXX is set to built-in(=y) , but doesn't when CONFIG_XXX is set to module(=m). Use this only when you're certain you want to do the same thing when the config is set to module or is disabled. Change-Id: Ia806b9b01ad8414d0e4de027a382cb68e7fb4a6a Signed-off-by: GG Hou <quic_renjhou@quicinc.com>
72 lines
2.4 KiB
C
72 lines
2.4 KiB
C
/*
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* Copyright (c) 2021-2022 Qualcomm Innovation Center, Inc. All rights reserved.
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* Copyright (c) 2019-2021, The Linux Foundation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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/*
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* Copyright (c) 2014 Samsung Electronics Co., Ltd
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sub license,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#include "dp_aux_bridge.h"
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static DEFINE_MUTEX(dp_aux_bridge_lock);
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static LIST_HEAD(du_aux_bridge_list);
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int dp_aux_add_bridge(struct dp_aux_bridge *bridge)
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{
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mutex_lock(&dp_aux_bridge_lock);
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list_add_tail(&bridge->head, &du_aux_bridge_list);
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mutex_unlock(&dp_aux_bridge_lock);
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return 0;
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}
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#if IS_ENABLED(CONFIG_OF)
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struct dp_aux_bridge *of_dp_aux_find_bridge(struct device_node *np)
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{
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struct dp_aux_bridge *bridge;
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mutex_lock(&dp_aux_bridge_lock);
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list_for_each_entry(bridge, &du_aux_bridge_list, head) {
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if (bridge->of_node == np) {
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mutex_unlock(&dp_aux_bridge_lock);
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return bridge;
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}
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}
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mutex_unlock(&dp_aux_bridge_lock);
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return NULL;
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}
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#endif /* CONFIG_OF */
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