drivers/power/test_power.c

   1 /*
   2  * Power supply driver for testing.
   3  *
   4  * Copyright 2010  Anton Vorontsov <cbouatmailru@gmail.com>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/module.h>
  13 #include <linux/power_supply.h>
  14 #include <linux/errno.h>
  15 #include <linux/delay.h>
  16 #include <linux/vermagic.h>
  17
  18 static int test_power_ac_online = 1;
  19 static int test_power_battery_status = POWER_SUPPLY_STATUS_CHARGING;
  20
  21 static int test_power_get_ac_property(struct power_supply *psy,
  22                                       enum power_supply_property psp,
  23                                       union power_supply_propval *val)
  24 {
  25         switch (psp) {
  26         case POWER_SUPPLY_PROP_ONLINE:
  27                 val->intval = test_power_ac_online;
  28                 break;
  29         default:
  30                 return -EINVAL;
  31         }
  32         return 0;
  33 }
  34
  35 static int test_power_get_battery_property(struct power_supply *psy,
  36                                            enum power_supply_property psp,
  37                                            union power_supply_propval *val)
  38 {
  39         switch (psp) {
  40         case POWER_SUPPLY_PROP_MODEL_NAME:
  41                 val->strval = "Test battery";
  42                 break;
  43         case POWER_SUPPLY_PROP_MANUFACTURER:
  44                 val->strval = "Linux";
  45                 break;
  46         case POWER_SUPPLY_PROP_SERIAL_NUMBER:
  47                 val->strval = UTS_RELEASE;
  48                 break;
  49         case POWER_SUPPLY_PROP_STATUS:
  50                 val->intval = test_power_battery_status;
  51                 break;
  52         case POWER_SUPPLY_PROP_CHARGE_TYPE:
  53                 val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST;
  54                 break;
  55         case POWER_SUPPLY_PROP_HEALTH:
  56                 val->intval = POWER_SUPPLY_HEALTH_GOOD;
  57                 break;
  58         case POWER_SUPPLY_PROP_TECHNOLOGY:
  59                 val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
  60                 break;
  61         case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
  62                 val->intval = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
  63                 break;
  64         case POWER_SUPPLY_PROP_CAPACITY:
  65                 val->intval = 50;
  66                 break;
  67         case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG:
  68         case POWER_SUPPLY_PROP_TIME_TO_FULL_NOW:
  69                 val->intval = 3600;
  70                 break;
  71         default:
  72                 pr_info("%s: some properties deliberately report errors.\n",
  73                         __func__);
  74                 return -EINVAL;
  75         }
  76         return 0;
  77 }
  78
  79 static enum power_supply_property test_power_ac_props[] = {
  80         POWER_SUPPLY_PROP_ONLINE,
  81 };
  82
  83 static enum power_supply_property test_power_battery_props[] = {
  84         POWER_SUPPLY_PROP_STATUS,
  85         POWER_SUPPLY_PROP_CHARGE_TYPE,
  86         POWER_SUPPLY_PROP_HEALTH,
  87         POWER_SUPPLY_PROP_TECHNOLOGY,
  88         POWER_SUPPLY_PROP_CHARGE_FULL,
  89         POWER_SUPPLY_PROP_CHARGE_EMPTY,
  90         POWER_SUPPLY_PROP_CAPACITY,
  91         POWER_SUPPLY_PROP_CAPACITY_LEVEL,
  92         POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
  93         POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
  94         POWER_SUPPLY_PROP_MODEL_NAME,
  95         POWER_SUPPLY_PROP_MANUFACTURER,
  96         POWER_SUPPLY_PROP_SERIAL_NUMBER,
  97 };
  98
  99 static char *test_power_ac_supplied_to[] = {
 100         "test_battery",
 101 };
 102
 103 static struct power_supply test_power_supplies[] = {
 104         {
 105                 .name = "test_ac",
 106                 .type = POWER_SUPPLY_TYPE_MAINS,
 107                 .supplied_to = test_power_ac_supplied_to,
 108                 .num_supplicants = ARRAY_SIZE(test_power_ac_supplied_to),
 109                 .properties = test_power_ac_props,
 110                 .num_properties = ARRAY_SIZE(test_power_ac_props),
 111                 .get_property = test_power_get_ac_property,
 112         }, {
 113                 .name = "test_battery",
 114                 .type = POWER_SUPPLY_TYPE_BATTERY,
 115                 .properties = test_power_battery_props,
 116                 .num_properties = ARRAY_SIZE(test_power_battery_props),
 117                 .get_property = test_power_get_battery_property,
 118         },
 119 };
 120
 121 static int __init test_power_init(void)
 122 {
 123         int i;
 124         int ret;
 125
 126         for (i = 0; i < ARRAY_SIZE(test_power_supplies); i++) {
 127                 ret = power_supply_register(NULL, &test_power_supplies[i]);
 128                 if (ret) {
 129                         pr_err("%s: failed to register %s\n", __func__,
 130                                 test_power_supplies[i].name);
 131                         goto failed;
 132                 }
 133         }
 134
 135         return 0;
 136 failed:
 137         while (--i >= 0)
 138                 power_supply_unregister(&test_power_supplies[i]);
 139         return ret;
 140 }
 141 module_init(test_power_init);
 142
 143 static void __exit test_power_exit(void)
 144 {
 145         int i;
 146
 147         /* Let's see how we handle changes... */
 148         test_power_ac_online = 0;
 149         test_power_battery_status = POWER_SUPPLY_STATUS_DISCHARGING;
 150         for (i = 0; i < ARRAY_SIZE(test_power_supplies); i++)
 151                 power_supply_changed(&test_power_supplies[i]);
 152         pr_info("%s: 'changed' event sent, sleeping for 10 seconds...\n",
 153                 __func__);
 154         ssleep(10);
 155
 156         for (i = 0; i < ARRAY_SIZE(test_power_supplies); i++)
 157                 power_supply_unregister(&test_power_supplies[i]);
 158 }
 159 module_exit(test_power_exit);
 160
 161 MODULE_DESCRIPTION("Power supply driver for testing");
 162 MODULE_AUTHOR("Anton Vorontsov <cbouatmailru@gmail.com>");
 163 MODULE_LICENSE("GPL");