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#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
  23struct mtk_smi_iommu {
  24        unsigned int larb_nr;
  25        struct mtk_smi_larb_iommu larb_imu[MTK_LARB_NR_MAX];
  26};
  27
  28/*
  29 * mtk_smi_larb_get: Enable the power domain and clocks for this local arbiter.
  30 *                   It also initialize some basic setting(like iommu).
  31 * mtk_smi_larb_put: Disable the power domain and clocks for this local arbiter.
  32 * Both should be called in non-atomic context.
  33 *
  34 * Returns 0 if successful, negative on failure.
  35 */
  36int mtk_smi_larb_get(struct device *larbdev);
  37void mtk_smi_larb_put(struct device *larbdev);
  38
  39#else
  40
  41static inline int mtk_smi_larb_get(struct device *larbdev)
  42{
  43        return 0;
  44}
  45
  46static inline void mtk_smi_larb_put(struct device *larbdev) { }
  47
  48#endif
  49
  50#endif
  51