drivers/phy/sandbox-phy.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 #define DRIVER_DATA 0x12345678
  12
  13 struct sandbox_phy_priv {
  14         bool initialized;
  15         bool on;
  16         bool broken;
  17 };
  18
  19 static int sandbox_phy_power_on(struct phy *phy)
  20 {
  21         struct sandbox_phy_priv *priv = dev_get_priv(phy->dev);
  22
  23         if (!priv->initialized)
  24                 return -EIO;
  25
  26         if (priv->broken)
  27                 return -EIO;
  28
  29         priv->on = true;
  30
  31         return 0;
  32 }
  33
  34 static int sandbox_phy_power_off(struct phy *phy)
  35 {
  36         struct sandbox_phy_priv *priv = dev_get_priv(phy->dev);
  37
  38         if (!priv->initialized)
  39                 return -EIO;
  40
  41         if (priv->broken)
  42                 return -EIO;
  43
  44         /*
  45          * for validation purpose, let's says that power off
  46          * works only for PHY 0
  47          */
  48         if (phy->id)
  49                 return -EIO;
  50
  51         priv->on = false;
  52
  53         return 0;
  54 }
  55
  56 static int sandbox_phy_init(struct phy *phy)
  57 {
  58         struct sandbox_phy_priv *priv = dev_get_priv(phy->dev);
  59
  60         priv->initialized = true;
  61         priv->on = true;
  62
  63         return 0;
  64 }
  65
  66 static int sandbox_phy_exit(struct phy *phy)
  67 {
  68         struct sandbox_phy_priv *priv = dev_get_priv(phy->dev);
  69
  70         priv->initialized = false;
  71         priv->on = false;
  72
  73         return 0;
  74 }
  75
  76 static int sandbox_phy_bind(struct udevice *dev)
  77 {
  78         if (dev_get_driver_data(dev) != DRIVER_DATA)
  79                 return -ENODATA;
  80
  81         return 0;
  82 }
  83
  84 static int sandbox_phy_probe(struct udevice *dev)
  85 {
  86         struct sandbox_phy_priv *priv = dev_get_priv(dev);
  87
  88         priv->initialized = false;
  89         priv->on = false;
  90         priv->broken = dev_read_bool(dev, "broken");
  91
  92         return 0;
  93 }
  94
  95 static struct phy_ops sandbox_phy_ops = {
  96         .power_on = sandbox_phy_power_on,
  97         .power_off = sandbox_phy_power_off,
  98         .init = sandbox_phy_init,
  99         .exit = sandbox_phy_exit,
 100 };
 101
 102 static const struct udevice_id sandbox_phy_ids[] = {
 103         { .compatible = "sandbox,phy_no_driver_data",
 104         },
 105
 106         { .compatible = "sandbox,phy",
 107           .data = DRIVER_DATA
 108         },
 109         { }
 110 };
 111
 112 U_BOOT_DRIVER(phy_sandbox) = {
 113         .name           = "phy_sandbox",
 114         .id             = UCLASS_PHY,
 115         .bind           = sandbox_phy_bind,
 116         .of_match       = sandbox_phy_ids,
 117         .ops            = &sandbox_phy_ops,
 118         .probe          = sandbox_phy_probe,
 119         .priv_auto      = sizeof(struct sandbox_phy_priv),
 120 };