1/* SPDX-License-Identifier: GPL-2.0-only */
 2/*
 3 * Copyright (c) 2015-2016 MediaTek Inc.
 4 * Author: Yong Wu <yong.wu@mediatek.com>
 5 */
 6#ifndef MTK_IOMMU_SMI_H
 7#define MTK_IOMMU_SMI_H
 8
 9#include <linux/bitops.h>
10#include <linux/device.h>
11
12#if IS_ENABLED(CONFIG_MTK_SMI)
13
14#define MTK_SMI_MMU_EN(port)	BIT(port)
15
16struct mtk_smi_larb_iommu {
17	struct device *dev;
18	unsigned int   mmu;
19	unsigned char  bank[32];
20};
21
22/*
23 * mtk_smi_larb_get: Enable the power domain and clocks for this local arbiter.
24 *                   It also initialize some basic setting(like iommu).
25 * mtk_smi_larb_put: Disable the power domain and clocks for this local arbiter.
26 * Both should be called in non-atomic context.
27 *
28 * Returns 0 if successful, negative on failure.
29 */
30int mtk_smi_larb_get(struct device *larbdev);
31void mtk_smi_larb_put(struct device *larbdev);
32
33#else
34
35static inline int mtk_smi_larb_get(struct device *larbdev)
36{
37	return 0;
38}
39
40static inline void mtk_smi_larb_put(struct device *larbdev) { }
41
42#endif
43
44#endif