drivers/phy/phy-uclass.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2017 Texas Instruments Incorporated - http://www.ti.com/
   4  * Written by Jean-Jacques Hiblot  <jjhiblot@ti.com>
   5  */
   6
   7 #include <common.h>
   8 #include <dm.h>
   9 #include <generic-phy.h>
  10
  11 static inline struct phy_ops *phy_dev_ops(struct udevice *dev)
  12 {
  13         return (struct phy_ops *)dev->driver->ops;
  14 }
  15
  16 static int generic_phy_xlate_offs_flags(struct phy *phy,
  17                                         struct ofnode_phandle_args *args)
  18 {
  19         debug("%s(phy=%p)\n", __func__, phy);
  20
  21         if (args->args_count > 1) {
  22                 debug("Invaild args_count: %d\n", args->args_count);
  23                 return -EINVAL;
  24         }
  25
  26         if (args->args_count)
  27                 phy->id = args->args[0];
  28         else
  29                 phy->id = 0;
  30
  31         return 0;
  32 }
  33
  34 int generic_phy_get_by_index(struct udevice *dev, int index,
  35                              struct phy *phy)
  36 {
  37         struct ofnode_phandle_args args;
  38         struct phy_ops *ops;
  39         int ret;
  40         struct udevice *phydev;
  41
  42         debug("%s(dev=%p, index=%d, phy=%p)\n", __func__, dev, index, phy);
  43
  44         assert(phy);
  45         phy->dev = NULL;
  46         ret = dev_read_phandle_with_args(dev, "phys", "#phy-cells", 0, index,
  47                                          &args);
  48         if (ret) {
  49                 debug("%s: dev_read_phandle_with_args failed: err=%d\n",
  50                       __func__, ret);
  51                 return ret;
  52         }
  53
  54         ret = uclass_get_device_by_ofnode(UCLASS_PHY, args.node, &phydev);
  55         if (ret) {
  56                 debug("%s: uclass_get_device_by_ofnode failed: err=%d\n",
  57                       __func__, ret);
  58                 return ret;
  59         }
  60
  61         phy->dev = phydev;
  62
  63         ops = phy_dev_ops(phydev);
  64
  65         if (ops->of_xlate)
  66                 ret = ops->of_xlate(phy, &args);
  67         else
  68                 ret = generic_phy_xlate_offs_flags(phy, &args);
  69         if (ret) {
  70                 debug("of_xlate() failed: %d\n", ret);
  71                 goto err;
  72         }
  73
  74         return 0;
  75
  76 err:
  77         return ret;
  78 }
  79
  80 int generic_phy_get_by_name(struct udevice *dev, const char *phy_name,
  81                             struct phy *phy)
  82 {
  83         int index;
  84
  85         debug("%s(dev=%p, name=%s, phy=%p)\n", __func__, dev, phy_name, phy);
  86
  87         index = dev_read_stringlist_search(dev, "phy-names", phy_name);
  88         if (index < 0) {
  89                 debug("dev_read_stringlist_search() failed: %d\n", index);
  90                 return index;
  91         }
  92
  93         return generic_phy_get_by_index(dev, index, phy);
  94 }
  95
  96 int generic_phy_init(struct phy *phy)
  97 {
  98         struct phy_ops const *ops = phy_dev_ops(phy->dev);
  99
 100         return ops->init ? ops->init(phy) : 0;
 101 }
 102
 103 int generic_phy_reset(struct phy *phy)
 104 {
 105         struct phy_ops const *ops = phy_dev_ops(phy->dev);
 106
 107         return ops->reset ? ops->reset(phy) : 0;
 108 }
 109
 110 int generic_phy_exit(struct phy *phy)
 111 {
 112         struct phy_ops const *ops = phy_dev_ops(phy->dev);
 113
 114         return ops->exit ? ops->exit(phy) : 0;
 115 }
 116
 117 int generic_phy_power_on(struct phy *phy)
 118 {
 119         struct phy_ops const *ops = phy_dev_ops(phy->dev);
 120
 121         return ops->power_on ? ops->power_on(phy) : 0;
 122 }
 123
 124 int generic_phy_power_off(struct phy *phy)
 125 {
 126         struct phy_ops const *ops = phy_dev_ops(phy->dev);
 127
 128         return ops->power_off ? ops->power_off(phy) : 0;
 129 }
 130
 131 UCLASS_DRIVER(phy) = {
 132         .id             = UCLASS_PHY,
 133         .name           = "phy",
 134 };