LXR linux/include/soc/mediatek/smi.h

   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
  45