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#ifdef CONFIG_MTK_SMI
13
14#define MTK_LARB_NR_MAX		16
15
16#define MTK_SMI_MMU_EN(port)	BIT(port)
17
18struct mtk_smi_larb_iommu {
19	struct device *dev;
20	unsigned int   mmu;
21};
22
23/*
24 * mtk_smi_larb_get: Enable the power domain and clocks for this local arbiter.
25 *                   It also initialize some basic setting(like iommu).
26 * mtk_smi_larb_put: Disable the power domain and clocks for this local arbiter.
27 * Both should be called in non-atomic context.
28 *
29 * Returns 0 if successful, negative on failure.
30 */
31int mtk_smi_larb_get(struct device *larbdev);
32void mtk_smi_larb_put(struct device *larbdev);
33
34#else
35
36static inline int mtk_smi_larb_get(struct device *larbdev)
37{
38	return 0;
39}
40
41static inline void mtk_smi_larb_put(struct device *larbdev) { }
42
43#endif
44
45#endif
46