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 resource charger_resources[] = {
  60         {
  61                 .start  = TPS65090_IRQ_VAC_STATUS_CHANGE,
  62                 .end    = TPS65090_IRQ_VAC_STATUS_CHANGE,
  63                 .flags  = IORESOURCE_IRQ,
  64         }
  65 };
  66
  67 static struct mfd_cell tps65090s[] = {
  68         {
  69                 .name = "tps65090-pmic",
  70         },
  71         {
  72                 .name = "tps65090-charger",
  73                 .num_resources = ARRAY_SIZE(charger_resources),
  74                 .resources = &charger_resources[0],
  75                 .of_compatible = "ti,tps65090-charger",
  76         },
  77 };
  78
  79 static const struct regmap_irq tps65090_irqs[] = {
  80         /* INT1 IRQs*/
  81         [TPS65090_IRQ_VAC_STATUS_CHANGE] = {
  82                         .mask = TPS65090_INT1_MASK_VAC_STATUS_CHANGE,
  83         },
  84         [TPS65090_IRQ_VSYS_STATUS_CHANGE] = {
  85                         .mask = TPS65090_INT1_MASK_VSYS_STATUS_CHANGE,
  86         },
  87         [TPS65090_IRQ_BAT_STATUS_CHANGE] = {
  88                         .mask = TPS65090_INT1_MASK_BAT_STATUS_CHANGE,
  89         },
  90         [TPS65090_IRQ_CHARGING_STATUS_CHANGE] = {
  91                         .mask = TPS65090_INT1_MASK_CHARGING_STATUS_CHANGE,
  92         },
  93         [TPS65090_IRQ_CHARGING_COMPLETE] = {
  94                         .mask = TPS65090_INT1_MASK_CHARGING_COMPLETE,
  95         },
  96         [TPS65090_IRQ_OVERLOAD_DCDC1] = {
  97                         .mask = TPS65090_INT1_MASK_OVERLOAD_DCDC1,
  98         },
  99         [TPS65090_IRQ_OVERLOAD_DCDC2] = {
 100                         .mask = TPS65090_INT1_MASK_OVERLOAD_DCDC2,
 101         },
 102         /* INT2 IRQs*/
 103         [TPS65090_IRQ_OVERLOAD_DCDC3] = {
 104                         .reg_offset = 1,
 105                         .mask = TPS65090_INT2_MASK_OVERLOAD_DCDC3,
 106         },
 107         [TPS65090_IRQ_OVERLOAD_FET1] = {
 108                         .reg_offset = 1,
 109                         .mask = TPS65090_INT2_MASK_OVERLOAD_FET1,
 110         },
 111         [TPS65090_IRQ_OVERLOAD_FET2] = {
 112                         .reg_offset = 1,
 113                         .mask = TPS65090_INT2_MASK_OVERLOAD_FET2,
 114         },
 115         [TPS65090_IRQ_OVERLOAD_FET3] = {
 116                         .reg_offset = 1,
 117                         .mask = TPS65090_INT2_MASK_OVERLOAD_FET3,
 118         },
 119         [TPS65090_IRQ_OVERLOAD_FET4] = {
 120                         .reg_offset = 1,
 121                         .mask = TPS65090_INT2_MASK_OVERLOAD_FET4,
 122         },
 123         [TPS65090_IRQ_OVERLOAD_FET5] = {
 124                         .reg_offset = 1,
 125                         .mask = TPS65090_INT2_MASK_OVERLOAD_FET5,
 126         },
 127         [TPS65090_IRQ_OVERLOAD_FET6] = {
 128                         .reg_offset = 1,
 129                         .mask = TPS65090_INT2_MASK_OVERLOAD_FET6,
 130         },
 131         [TPS65090_IRQ_OVERLOAD_FET7] = {
 132                         .reg_offset = 1,
 133                         .mask = TPS65090_INT2_MASK_OVERLOAD_FET7,
 134         },
 135 };
 136
 137 static struct regmap_irq_chip tps65090_irq_chip = {
 138         .name = "tps65090",
 139         .irqs = tps65090_irqs,
 140         .num_irqs = ARRAY_SIZE(tps65090_irqs),
 141         .num_regs = NUM_INT_REG,
 142         .status_base = TPS65090_INT_STS,
 143         .mask_base = TPS65090_INT_MSK,
 144         .mask_invert = true,
 145 };
 146
 147 static bool is_volatile_reg(struct device *dev, unsigned int reg)
 148 {
 149         if ((reg == TPS65090_INT_STS) || (reg == TPS65090_INT_STS2))
 150                 return true;
 151         else
 152                 return false;
 153 }
 154
 155 static const struct regmap_config tps65090_regmap_config = {
 156         .reg_bits = 8,
 157         .val_bits = 8,
 158         .max_register = TOTAL_NUM_REG,
 159         .num_reg_defaults_raw = TOTAL_NUM_REG,
 160         .cache_type = REGCACHE_RBTREE,
 161         .volatile_reg = is_volatile_reg,
 162 };
 163
 164 #ifdef CONFIG_OF
 165 static const struct of_device_id tps65090_of_match[] = {
 166         { .compatible = "ti,tps65090",},
 167         {},
 168 };
 169 MODULE_DEVICE_TABLE(of, tps65090_of_match);
 170 #endif
 171
 172 static int tps65090_i2c_probe(struct i2c_client *client,
 173                                         const struct i2c_device_id *id)
 174 {
 175         struct tps65090_platform_data *pdata = client->dev.platform_data;
 176         int irq_base = 0;
 177         struct tps65090 *tps65090;
 178         int ret;
 179
 180         if (!pdata && !client->dev.of_node) {
 181                 dev_err(&client->dev,
 182                         "tps65090 requires platform data or of_node\n");
 183                 return -EINVAL;
 184         }
 185
 186         if (pdata)
 187                 irq_base = pdata->irq_base;
 188
 189         tps65090 = devm_kzalloc(&client->dev, sizeof(*tps65090), GFP_KERNEL);
 190         if (!tps65090) {
 191                 dev_err(&client->dev, "mem alloc for tps65090 failed\n");
 192                 return -ENOMEM;
 193         }
 194
 195         tps65090->dev = &client->dev;
 196         i2c_set_clientdata(client, tps65090);
 197
 198         tps65090->rmap = devm_regmap_init_i2c(client, &tps65090_regmap_config);
 199         if (IS_ERR(tps65090->rmap)) {
 200                 ret = PTR_ERR(tps65090->rmap);
 201                 dev_err(&client->dev, "regmap_init failed with err: %d\n", ret);
 202                 return ret;
 203         }
 204
 205         if (client->irq) {
 206                 ret = regmap_add_irq_chip(tps65090->rmap, client->irq,
 207                         IRQF_ONESHOT | IRQF_TRIGGER_LOW, irq_base,
 208                         &tps65090_irq_chip, &tps65090->irq_data);
 209                         if (ret) {
 210                                 dev_err(&client->dev,
 211                                         "IRQ init failed with err: %d\n", ret);
 212                         return ret;
 213                 }
 214         }
 215
 216         ret = mfd_add_devices(tps65090->dev, -1, tps65090s,
 217                 ARRAY_SIZE(tps65090s), NULL,
 218                 0, regmap_irq_get_domain(tps65090->irq_data));
 219         if (ret) {
 220                 dev_err(&client->dev, "add mfd devices failed with err: %d\n",
 221                         ret);
 222                 goto err_irq_exit;
 223         }
 224
 225         return 0;
 226
 227 err_irq_exit:
 228         if (client->irq)
 229                 regmap_del_irq_chip(client->irq, tps65090->irq_data);
 230         return ret;
 231 }
 232
 233 static int tps65090_i2c_remove(struct i2c_client *client)
 234 {
 235         struct tps65090 *tps65090 = i2c_get_clientdata(client);
 236
 237         mfd_remove_devices(tps65090->dev);
 238         if (client->irq)
 239                 regmap_del_irq_chip(client->irq, tps65090->irq_data);
 240
 241         return 0;
 242 }
 243
 244 static const struct i2c_device_id tps65090_id_table[] = {
 245         { "tps65090", 0 },
 246         { },
 247 };
 248 MODULE_DEVICE_TABLE(i2c, tps65090_id_table);
 249
 250 static struct i2c_driver tps65090_driver = {
 251         .driver = {
 252                 .name   = "tps65090",
 253                 .owner  = THIS_MODULE,
 254                 .of_match_table = of_match_ptr(tps65090_of_match),
 255         },
 256         .probe          = tps65090_i2c_probe,
 257         .remove         = tps65090_i2c_remove,
 258         .id_table       = tps65090_id_table,
 259 };
 260
 261 static int __init tps65090_init(void)
 262 {
 263         return i2c_add_driver(&tps65090_driver);
 264 }
 265 subsys_initcall(tps65090_init);
 266
 267 static void __exit tps65090_exit(void)
 268 {
 269         i2c_del_driver(&tps65090_driver);
 270 }
 271 module_exit(tps65090_exit);
 272
 273 MODULE_DESCRIPTION("TPS65090 core driver");
 274 MODULE_AUTHOR("Venu Byravarasu <vbyravarasu@nvidia.com>");
 275 MODULE_LICENSE("GPL v2");