drivers/phy/mediatek/phy-mtk-io.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Copyright (C) 2021 MediaTek Inc.
   4  *
   5  * Author: Chunfeng Yun <chunfeng.yun@mediatek.com>
   6  */
   7
   8 #ifndef __PHY_MTK_H__
   9 #define __PHY_MTK_H__
  10
  11 #include <linux/bitfield.h>
  12 #include <linux/io.h>
  13
  14 static inline void mtk_phy_clear_bits(void __iomem *reg, u32 bits)
  15 {
  16         u32 tmp = readl(reg);
  17
  18         tmp &= ~bits;
  19         writel(tmp, reg);
  20 }
  21
  22 static inline void mtk_phy_set_bits(void __iomem *reg, u32 bits)
  23 {
  24         u32 tmp = readl(reg);
  25
  26         tmp |= bits;
  27         writel(tmp, reg);
  28 }
  29
  30 static inline void mtk_phy_update_bits(void __iomem *reg, u32 mask, u32 val)
  31 {
  32         u32 tmp = readl(reg);
  33
  34         tmp &= ~mask;
  35         tmp |= val & mask;
  36         writel(tmp, reg);
  37 }
  38
  39 /* field @mask shall be constant and continuous */
  40 #define mtk_phy_update_field(reg, mask, val) \
  41 ({ \
  42         BUILD_BUG_ON_MSG(!__builtin_constant_p(mask), "mask is not constant"); \
  43         mtk_phy_update_bits(reg, mask, FIELD_PREP(mask, val)); \
  44 })
  45
  46 #endif