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
  18 struct 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  */
  31 int mtk_smi_larb_get(struct device *larbdev);
  32 void mtk_smi_larb_put(struct device *larbdev);
  33
  34 #else
  35
  36 static inline int mtk_smi_larb_get(struct device *larbdev)
  37 {
  38         return 0;
  39 }
  40
  41 static inline void mtk_smi_larb_put(struct device *larbdev) { }
  42
  43 #endif
  44
  45 #endif