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/of.h>
  29 #include <linux/of_device.h>
  30 #include <linux/err.h>
  31
  32 #define NUM_INT_REG 2
  33 #define TOTAL_NUM_REG 0x18
  34
  35 /* interrupt status registers */
  36 #define TPS65090_INT_STS        0x0
  37 #define TPS65090_INT_STS2       0x1
  38
  39 /* interrupt mask registers */
  40 #define TPS65090_INT_MSK        0x2
  41 #define TPS65090_INT_MSK2       0x3
  42
  43 #define TPS65090_INT1_MASK_VAC_STATUS_CHANGE            1
  44 #define TPS65090_INT1_MASK_VSYS_STATUS_CHANGE           2
  45 #define TPS65090_INT1_MASK_BAT_STATUS_CHANGE            3
  46 #define TPS65090_INT1_MASK_CHARGING_STATUS_CHANGE       4
  47 #define TPS65090_INT1_MASK_CHARGING_COMPLETE            5
  48 #define TPS65090_INT1_MASK_OVERLOAD_DCDC1               6
  49 #define TPS65090_INT1_MASK_OVERLOAD_DCDC2               7
  50 #define TPS65090_INT2_MASK_OVERLOAD_DCDC3               0
  51 #define TPS65090_INT2_MASK_OVERLOAD_FET1                1
  52 #define TPS65090_INT2_MASK_OVERLOAD_FET2                2
  53 #define TPS65090_INT2_MASK_OVERLOAD_FET3                3
  54 #define TPS65090_INT2_MASK_OVERLOAD_FET4                4
  55 #define TPS65090_INT2_MASK_OVERLOAD_FET5                5
  56 #define TPS65090_INT2_MASK_OVERLOAD_FET6                6
  57 #define TPS65090_INT2_MASK_OVERLOAD_FET7                7
  58
  59 static struct mfd_cell tps65090s[] = {
  60         {
  61                 .name = "tps65090-pmic",
  62         },
  63         {
  64                 .name = "tps65090-charger",
  65         },
  66 };
  67
  68 static const struct regmap_irq tps65090_irqs[] = {
  69         /* INT1 IRQs*/
  70         [TPS65090_IRQ_VAC_STATUS_CHANGE] = {
  71                         .mask = TPS65090_INT1_MASK_VAC_STATUS_CHANGE,
  72         },
  73         [TPS65090_IRQ_VSYS_STATUS_CHANGE] = {
  74                         .mask = TPS65090_INT1_MASK_VSYS_STATUS_CHANGE,
  75         },
  76         [TPS65090_IRQ_BAT_STATUS_CHANGE] = {
  77                         .mask = TPS65090_INT1_MASK_BAT_STATUS_CHANGE,
  78         },
  79         [TPS65090_IRQ_CHARGING_STATUS_CHANGE] = {
  80                         .mask = TPS65090_INT1_MASK_CHARGING_STATUS_CHANGE,
  81         },
  82         [TPS65090_IRQ_CHARGING_COMPLETE] = {
  83                         .mask = TPS65090_INT1_MASK_CHARGING_COMPLETE,
  84         },
  85         [TPS65090_IRQ_OVERLOAD_DCDC1] = {
  86                         .mask = TPS65090_INT1_MASK_OVERLOAD_DCDC1,
  87         },
  88         [TPS65090_IRQ_OVERLOAD_DCDC2] = {
  89                         .mask = TPS65090_INT1_MASK_OVERLOAD_DCDC2,
  90         },
  91         /* INT2 IRQs*/
  92         [TPS65090_IRQ_OVERLOAD_DCDC3] = {
  93                         .reg_offset = 1,
  94                         .mask = TPS65090_INT2_MASK_OVERLOAD_DCDC3,
  95         },
  96         [TPS65090_IRQ_OVERLOAD_FET1] = {
  97                         .reg_offset = 1,
  98                         .mask = TPS65090_INT2_MASK_OVERLOAD_FET1,
  99         },
 100         [TPS65090_IRQ_OVERLOAD_FET2] = {
 101                         .reg_offset = 1,
 102                         .mask = TPS65090_INT2_MASK_OVERLOAD_FET2,
 103         },
 104         [TPS65090_IRQ_OVERLOAD_FET3] = {
 105                         .reg_offset = 1,
 106                         .mask = TPS65090_INT2_MASK_OVERLOAD_FET3,
 107         },
 108         [TPS65090_IRQ_OVERLOAD_FET4] = {
 109                         .reg_offset = 1,
 110                         .mask = TPS65090_INT2_MASK_OVERLOAD_FET4,
 111         },
 112         [TPS65090_IRQ_OVERLOAD_FET5] = {
 113                         .reg_offset = 1,
 114                         .mask = TPS65090_INT2_MASK_OVERLOAD_FET5,
 115         },
 116         [TPS65090_IRQ_OVERLOAD_FET6] = {
 117                         .reg_offset = 1,
 118                         .mask = TPS65090_INT2_MASK_OVERLOAD_FET6,
 119         },
 120         [TPS65090_IRQ_OVERLOAD_FET7] = {
 121                         .reg_offset = 1,
 122                         .mask = TPS65090_INT2_MASK_OVERLOAD_FET7,
 123         },
 124 };
 125
 126 static struct regmap_irq_chip tps65090_irq_chip = {
 127         .name = "tps65090",
 128         .irqs = tps65090_irqs,
 129         .num_irqs = ARRAY_SIZE(tps65090_irqs),
 130         .num_regs = NUM_INT_REG,
 131         .status_base = TPS65090_INT_STS,
 132         .mask_base = TPS65090_INT_MSK,
 133         .mask_invert = true,
 134 };
 135
 136 static bool is_volatile_reg(struct device *dev, unsigned int reg)
 137 {
 138         if ((reg == TPS65090_INT_STS) || (reg == TPS65090_INT_STS2))
 139                 return true;
 140         else
 141                 return false;
 142 }
 143
 144 static const struct regmap_config tps65090_regmap_config = {
 145         .reg_bits = 8,
 146         .val_bits = 8,
 147         .max_register = TOTAL_NUM_REG,
 148         .num_reg_defaults_raw = TOTAL_NUM_REG,
 149         .cache_type = REGCACHE_RBTREE,
 150         .volatile_reg = is_volatile_reg,
 151 };
 152
 153 #ifdef CONFIG_OF
 154 static const struct of_device_id tps65090_of_match[] = {
 155         { .compatible = "ti,tps65090",},
 156         {},
 157 };
 158 MODULE_DEVICE_TABLE(of, tps65090_of_match);
 159 #endif
 160
 161 static int tps65090_i2c_probe(struct i2c_client *client,
 162                                         const struct i2c_device_id *id)
 163 {
 164         struct tps65090_platform_data *pdata = client->dev.platform_data;
 165         int irq_base = 0;
 166         struct tps65090 *tps65090;
 167         int ret;
 168
 169         if (!pdata && !client->dev.of_node) {
 170                 dev_err(&client->dev,
 171                         "tps65090 requires platform data or of_node\n");
 172                 return -EINVAL;
 173         }
 174
 175         if (pdata)
 176                 irq_base = pdata->irq_base;
 177
 178         tps65090 = devm_kzalloc(&client->dev, sizeof(*tps65090), GFP_KERNEL);
 179         if (!tps65090) {
 180                 dev_err(&client->dev, "mem alloc for tps65090 failed\n");
 181                 return -ENOMEM;
 182         }
 183
 184         tps65090->dev = &client->dev;
 185         i2c_set_clientdata(client, tps65090);
 186
 187         tps65090->rmap = devm_regmap_init_i2c(client, &tps65090_regmap_config);
 188         if (IS_ERR(tps65090->rmap)) {
 189                 ret = PTR_ERR(tps65090->rmap);
 190                 dev_err(&client->dev, "regmap_init failed with err: %d\n", ret);
 191                 return ret;
 192         }
 193
 194         if (client->irq) {
 195                 ret = regmap_add_irq_chip(tps65090->rmap, client->irq,
 196                         IRQF_ONESHOT | IRQF_TRIGGER_LOW, irq_base,
 197                         &tps65090_irq_chip, &tps65090->irq_data);
 198                         if (ret) {
 199                                 dev_err(&client->dev,
 200                                         "IRQ init failed with err: %d\n", ret);
 201                         return ret;
 202                 }
 203         }
 204
 205         ret = mfd_add_devices(tps65090->dev, -1, tps65090s,
 206                 ARRAY_SIZE(tps65090s), NULL,
 207                 0, regmap_irq_get_domain(tps65090->irq_data));
 208         if (ret) {
 209                 dev_err(&client->dev, "add mfd devices failed with err: %d\n",
 210                         ret);
 211                 goto err_irq_exit;
 212         }
 213
 214         return 0;
 215
 216 err_irq_exit:
 217         if (client->irq)
 218                 regmap_del_irq_chip(client->irq, tps65090->irq_data);
 219         return ret;
 220 }
 221
 222 static int tps65090_i2c_remove(struct i2c_client *client)
 223 {
 224         struct tps65090 *tps65090 = i2c_get_clientdata(client);
 225
 226         mfd_remove_devices(tps65090->dev);
 227         if (client->irq)
 228                 regmap_del_irq_chip(client->irq, tps65090->irq_data);
 229
 230         return 0;
 231 }
 232
 233 static const struct i2c_device_id tps65090_id_table[] = {
 234         { "tps65090", 0 },
 235         { },
 236 };
 237 MODULE_DEVICE_TABLE(i2c, tps65090_id_table);
 238
 239 static struct i2c_driver tps65090_driver = {
 240         .driver = {
 241                 .name   = "tps65090",
 242                 .owner  = THIS_MODULE,
 243                 .of_match_table = of_match_ptr(tps65090_of_match),
 244         },
 245         .probe          = tps65090_i2c_probe,
 246         .remove         = tps65090_i2c_remove,
 247         .id_table       = tps65090_id_table,
 248 };
 249
 250 static int __init tps65090_init(void)
 251 {
 252         return i2c_add_driver(&tps65090_driver);
 253 }
 254 subsys_initcall(tps65090_init);
 255
 256 static void __exit tps65090_exit(void)
 257 {
 258         i2c_del_driver(&tps65090_driver);
 259 }
 260 module_exit(tps65090_exit);
 261
 262 MODULE_DESCRIPTION("TPS65090 core driver");
 263 MODULE_AUTHOR("Venu Byravarasu <vbyravarasu@nvidia.com>");
 264 MODULE_LICENSE("GPL v2");