drivers/mfd/tps65090.c

   1 /*
   2  * Core driver for TI TPS65090 PMIC family
   3  *
   4  * Copyright (c) 2012, NVIDIA CORPORATION.  All rights reserved.
   5
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms and conditions of the GNU General Public License,
   8  * version 2, as published by the Free Software Foundation.
   9
  10  * This program is distributed in the hope it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13  * more details.
  14
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #include <linux/interrupt.h>
  20 #include <linux/irq.h>
  21 #include <linux/kernel.h>
  22 #include <linux/module.h>
  23 #include <linux/mutex.h>
  24 #include <linux/slab.h>
  25 #include <linux/i2c.h>
  26 #include <linux/mfd/core.h>
  27 #include <linux/mfd/tps65090.h>
  28 #include <linux/err.h>
  29
  30 #define NUM_INT_REG 2
  31 #define TOTAL_NUM_REG 0x18
  32
  33 /* interrupt status registers */
  34 #define TPS65090_INT_STS        0x0
  35 #define TPS65090_INT_STS2       0x1
  36
  37 /* interrupt mask registers */
  38 #define TPS65090_INT_MSK        0x2
  39 #define TPS65090_INT_MSK2       0x3
  40
  41 #define TPS65090_INT1_MASK_VAC_STATUS_CHANGE            1
  42 #define TPS65090_INT1_MASK_VSYS_STATUS_CHANGE           2
  43 #define TPS65090_INT1_MASK_BAT_STATUS_CHANGE            3
  44 #define TPS65090_INT1_MASK_CHARGING_STATUS_CHANGE       4
  45 #define TPS65090_INT1_MASK_CHARGING_COMPLETE            5
  46 #define TPS65090_INT1_MASK_OVERLOAD_DCDC1               6
  47 #define TPS65090_INT1_MASK_OVERLOAD_DCDC2               7
  48 #define TPS65090_INT2_MASK_OVERLOAD_DCDC3               0
  49 #define TPS65090_INT2_MASK_OVERLOAD_FET1                1
  50 #define TPS65090_INT2_MASK_OVERLOAD_FET2                2
  51 #define TPS65090_INT2_MASK_OVERLOAD_FET3                3
  52 #define TPS65090_INT2_MASK_OVERLOAD_FET4                4
  53 #define TPS65090_INT2_MASK_OVERLOAD_FET5                5
  54 #define TPS65090_INT2_MASK_OVERLOAD_FET6                6
  55 #define TPS65090_INT2_MASK_OVERLOAD_FET7                7
  56
  57 static struct mfd_cell tps65090s[] = {
  58         {
  59                 .name = "tps65090-pmic",
  60         },
  61         {
  62                 .name = "tps65090-charger",
  63         },
  64 };
  65
  66 static const struct regmap_irq tps65090_irqs[] = {
  67         /* INT1 IRQs*/
  68         [TPS65090_IRQ_VAC_STATUS_CHANGE] = {
  69                         .mask = TPS65090_INT1_MASK_VAC_STATUS_CHANGE,
  70         },
  71         [TPS65090_IRQ_VSYS_STATUS_CHANGE] = {
  72                         .mask = TPS65090_INT1_MASK_VSYS_STATUS_CHANGE,
  73         },
  74         [TPS65090_IRQ_BAT_STATUS_CHANGE] = {
  75                         .mask = TPS65090_INT1_MASK_BAT_STATUS_CHANGE,
  76         },
  77         [TPS65090_IRQ_CHARGING_STATUS_CHANGE] = {
  78                         .mask = TPS65090_INT1_MASK_CHARGING_STATUS_CHANGE,
  79         },
  80         [TPS65090_IRQ_CHARGING_COMPLETE] = {
  81                         .mask = TPS65090_INT1_MASK_CHARGING_COMPLETE,
  82         },
  83         [TPS65090_IRQ_OVERLOAD_DCDC1] = {
  84                         .mask = TPS65090_INT1_MASK_OVERLOAD_DCDC1,
  85         },
  86         [TPS65090_IRQ_OVERLOAD_DCDC2] = {
  87                         .mask = TPS65090_INT1_MASK_OVERLOAD_DCDC2,
  88         },
  89         /* INT2 IRQs*/
  90         [TPS65090_IRQ_OVERLOAD_DCDC3] = {
  91                         .reg_offset = 1,
  92                         .mask = TPS65090_INT2_MASK_OVERLOAD_DCDC3,
  93         },
  94         [TPS65090_IRQ_OVERLOAD_FET1] = {
  95                         .reg_offset = 1,
  96                         .mask = TPS65090_INT2_MASK_OVERLOAD_FET1,
  97         },
  98         [TPS65090_IRQ_OVERLOAD_FET2] = {
  99                         .reg_offset = 1,
 100                         .mask = TPS65090_INT2_MASK_OVERLOAD_FET2,
 101         },
 102         [TPS65090_IRQ_OVERLOAD_FET3] = {
 103                         .reg_offset = 1,
 104                         .mask = TPS65090_INT2_MASK_OVERLOAD_FET3,
 105         },
 106         [TPS65090_IRQ_OVERLOAD_FET4] = {
 107                         .reg_offset = 1,
 108                         .mask = TPS65090_INT2_MASK_OVERLOAD_FET4,
 109         },
 110         [TPS65090_IRQ_OVERLOAD_FET5] = {
 111                         .reg_offset = 1,
 112                         .mask = TPS65090_INT2_MASK_OVERLOAD_FET5,
 113         },
 114         [TPS65090_IRQ_OVERLOAD_FET6] = {
 115                         .reg_offset = 1,
 116                         .mask = TPS65090_INT2_MASK_OVERLOAD_FET6,
 117         },
 118         [TPS65090_IRQ_OVERLOAD_FET7] = {
 119                         .reg_offset = 1,
 120                         .mask = TPS65090_INT2_MASK_OVERLOAD_FET7,
 121         },
 122 };
 123
 124 static struct regmap_irq_chip tps65090_irq_chip = {
 125         .name = "tps65090",
 126         .irqs = tps65090_irqs,
 127         .num_irqs = ARRAY_SIZE(tps65090_irqs),
 128         .num_regs = NUM_INT_REG,
 129         .status_base = TPS65090_INT_STS,
 130         .mask_base = TPS65090_INT_MSK,
 131         .mask_invert = true,
 132 };
 133
 134 static bool is_volatile_reg(struct device *dev, unsigned int reg)
 135 {
 136         if ((reg == TPS65090_INT_STS) || (reg == TPS65090_INT_STS2))
 137                 return true;
 138         else
 139                 return false;
 140 }
 141
 142 static const struct regmap_config tps65090_regmap_config = {
 143         .reg_bits = 8,
 144         .val_bits = 8,
 145         .max_register = TOTAL_NUM_REG,
 146         .num_reg_defaults_raw = TOTAL_NUM_REG,
 147         .cache_type = REGCACHE_RBTREE,
 148         .volatile_reg = is_volatile_reg,
 149 };
 150
 151 static int tps65090_i2c_probe(struct i2c_client *client,
 152                                         const struct i2c_device_id *id)
 153 {
 154         struct tps65090_platform_data *pdata = client->dev.platform_data;
 155         struct tps65090 *tps65090;
 156         int ret;
 157
 158         if (!pdata) {
 159                 dev_err(&client->dev, "tps65090 requires platform data\n");
 160                 return -EINVAL;
 161         }
 162
 163         tps65090 = devm_kzalloc(&client->dev, sizeof(*tps65090), GFP_KERNEL);
 164         if (!tps65090) {
 165                 dev_err(&client->dev, "mem alloc for tps65090 failed\n");
 166                 return -ENOMEM;
 167         }
 168
 169         tps65090->dev = &client->dev;
 170         i2c_set_clientdata(client, tps65090);
 171
 172         tps65090->rmap = devm_regmap_init_i2c(client, &tps65090_regmap_config);
 173         if (IS_ERR(tps65090->rmap)) {
 174                 ret = PTR_ERR(tps65090->rmap);
 175                 dev_err(&client->dev, "regmap_init failed with err: %d\n", ret);
 176                 return ret;
 177         }
 178
 179         if (client->irq) {
 180                 ret = regmap_add_irq_chip(tps65090->rmap, client->irq,
 181                         IRQF_ONESHOT | IRQF_TRIGGER_LOW, pdata->irq_base,
 182                         &tps65090_irq_chip, &tps65090->irq_data);
 183                         if (ret) {
 184                                 dev_err(&client->dev,
 185                                         "IRQ init failed with err: %d\n", ret);
 186                         return ret;
 187                 }
 188         }
 189
 190         ret = mfd_add_devices(tps65090->dev, -1, tps65090s,
 191                 ARRAY_SIZE(tps65090s), NULL,
 192                 regmap_irq_chip_get_base(tps65090->irq_data), NULL);
 193         if (ret) {
 194                 dev_err(&client->dev, "add mfd devices failed with err: %d\n",
 195                         ret);
 196                 goto err_irq_exit;
 197         }
 198
 199         return 0;
 200
 201 err_irq_exit:
 202         if (client->irq)
 203                 regmap_del_irq_chip(client->irq, tps65090->irq_data);
 204         return ret;
 205 }
 206
 207 static int tps65090_i2c_remove(struct i2c_client *client)
 208 {
 209         struct tps65090 *tps65090 = i2c_get_clientdata(client);
 210
 211         mfd_remove_devices(tps65090->dev);
 212         if (client->irq)
 213                 regmap_del_irq_chip(client->irq, tps65090->irq_data);
 214
 215         return 0;
 216 }
 217
 218 #ifdef CONFIG_PM_SLEEP
 219 static int tps65090_suspend(struct device *dev)
 220 {
 221         struct i2c_client *client = to_i2c_client(dev);
 222         if (client->irq)
 223                 disable_irq(client->irq);
 224         return 0;
 225 }
 226
 227 static int tps65090_resume(struct device *dev)
 228 {
 229         struct i2c_client *client = to_i2c_client(dev);
 230         if (client->irq)
 231                 enable_irq(client->irq);
 232         return 0;
 233 }
 234 #endif
 235
 236 static const struct dev_pm_ops tps65090_pm_ops = {
 237         SET_SYSTEM_SLEEP_PM_OPS(tps65090_suspend, tps65090_resume)
 238 };
 239
 240 static const struct i2c_device_id tps65090_id_table[] = {
 241         { "tps65090", 0 },
 242         { },
 243 };
 244 MODULE_DEVICE_TABLE(i2c, tps65090_id_table);
 245
 246 static struct i2c_driver tps65090_driver = {
 247         .driver = {
 248                 .name   = "tps65090",
 249                 .owner  = THIS_MODULE,
 250                 .pm     = &tps65090_pm_ops,
 251         },
 252         .probe          = tps65090_i2c_probe,
 253         .remove         = tps65090_i2c_remove,
 254         .id_table       = tps65090_id_table,
 255 };
 256
 257 static int __init tps65090_init(void)
 258 {
 259         return i2c_add_driver(&tps65090_driver);
 260 }
 261 subsys_initcall(tps65090_init);
 262
 263 static void __exit tps65090_exit(void)
 264 {
 265         i2c_del_driver(&tps65090_driver);
 266 }
 267 module_exit(tps65090_exit);
 268
 269 MODULE_DESCRIPTION("TPS65090 core driver");
 270 MODULE_AUTHOR("Venu Byravarasu <vbyravarasu@nvidia.com>");
 271 MODULE_LICENSE("GPL v2");