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
  34 #define TPS65090_INT1_MASK_VAC_STATUS_CHANGE            1
  35 #define TPS65090_INT1_MASK_VSYS_STATUS_CHANGE           2
  36 #define TPS65090_INT1_MASK_BAT_STATUS_CHANGE            3
  37 #define TPS65090_INT1_MASK_CHARGING_STATUS_CHANGE       4
  38 #define TPS65090_INT1_MASK_CHARGING_COMPLETE            5
  39 #define TPS65090_INT1_MASK_OVERLOAD_DCDC1               6
  40 #define TPS65090_INT1_MASK_OVERLOAD_DCDC2               7
  41 #define TPS65090_INT2_MASK_OVERLOAD_DCDC3               0
  42 #define TPS65090_INT2_MASK_OVERLOAD_FET1                1
  43 #define TPS65090_INT2_MASK_OVERLOAD_FET2                2
  44 #define TPS65090_INT2_MASK_OVERLOAD_FET3                3
  45 #define TPS65090_INT2_MASK_OVERLOAD_FET4                4
  46 #define TPS65090_INT2_MASK_OVERLOAD_FET5                5
  47 #define TPS65090_INT2_MASK_OVERLOAD_FET6                6
  48 #define TPS65090_INT2_MASK_OVERLOAD_FET7                7
  49
  50 static struct resource charger_resources[] = {
  51         {
  52                 .start  = TPS65090_IRQ_VAC_STATUS_CHANGE,
  53                 .end    = TPS65090_IRQ_VAC_STATUS_CHANGE,
  54                 .flags  = IORESOURCE_IRQ,
  55         }
  56 };
  57
  58 enum tps65090_cells {
  59         PMIC = 0,
  60         CHARGER = 1,
  61 };
  62
  63 static struct mfd_cell tps65090s[] = {
  64         [PMIC] = {
  65                 .name = "tps65090-pmic",
  66         },
  67         [CHARGER] = {
  68                 .name = "tps65090-charger",
  69                 .num_resources = ARRAY_SIZE(charger_resources),
  70                 .resources = &charger_resources[0],
  71                 .of_compatible = "ti,tps65090-charger",
  72         },
  73 };
  74
  75 static const struct regmap_irq tps65090_irqs[] = {
  76         /* INT1 IRQs*/
  77         [TPS65090_IRQ_VAC_STATUS_CHANGE] = {
  78                 .mask = TPS65090_INT1_MASK_VAC_STATUS_CHANGE,
  79         },
  80         [TPS65090_IRQ_VSYS_STATUS_CHANGE] = {
  81                 .mask = TPS65090_INT1_MASK_VSYS_STATUS_CHANGE,
  82         },
  83         [TPS65090_IRQ_BAT_STATUS_CHANGE] = {
  84                 .mask = TPS65090_INT1_MASK_BAT_STATUS_CHANGE,
  85         },
  86         [TPS65090_IRQ_CHARGING_STATUS_CHANGE] = {
  87                 .mask = TPS65090_INT1_MASK_CHARGING_STATUS_CHANGE,
  88         },
  89         [TPS65090_IRQ_CHARGING_COMPLETE] = {
  90                 .mask = TPS65090_INT1_MASK_CHARGING_COMPLETE,
  91         },
  92         [TPS65090_IRQ_OVERLOAD_DCDC1] = {
  93                 .mask = TPS65090_INT1_MASK_OVERLOAD_DCDC1,
  94         },
  95         [TPS65090_IRQ_OVERLOAD_DCDC2] = {
  96                 .mask = TPS65090_INT1_MASK_OVERLOAD_DCDC2,
  97         },
  98         /* INT2 IRQs*/
  99         [TPS65090_IRQ_OVERLOAD_DCDC3] = {
 100                 .reg_offset = 1,
 101                 .mask = TPS65090_INT2_MASK_OVERLOAD_DCDC3,
 102         },
 103         [TPS65090_IRQ_OVERLOAD_FET1] = {
 104                 .reg_offset = 1,
 105                 .mask = TPS65090_INT2_MASK_OVERLOAD_FET1,
 106         },
 107         [TPS65090_IRQ_OVERLOAD_FET2] = {
 108                 .reg_offset = 1,
 109                 .mask = TPS65090_INT2_MASK_OVERLOAD_FET2,
 110         },
 111         [TPS65090_IRQ_OVERLOAD_FET3] = {
 112                 .reg_offset = 1,
 113                 .mask = TPS65090_INT2_MASK_OVERLOAD_FET3,
 114         },
 115         [TPS65090_IRQ_OVERLOAD_FET4] = {
 116                 .reg_offset = 1,
 117                 .mask = TPS65090_INT2_MASK_OVERLOAD_FET4,
 118         },
 119         [TPS65090_IRQ_OVERLOAD_FET5] = {
 120                 .reg_offset = 1,
 121                 .mask = TPS65090_INT2_MASK_OVERLOAD_FET5,
 122         },
 123         [TPS65090_IRQ_OVERLOAD_FET6] = {
 124                 .reg_offset = 1,
 125                 .mask = TPS65090_INT2_MASK_OVERLOAD_FET6,
 126         },
 127         [TPS65090_IRQ_OVERLOAD_FET7] = {
 128                 .reg_offset = 1,
 129                 .mask = TPS65090_INT2_MASK_OVERLOAD_FET7,
 130         },
 131 };
 132
 133 static struct regmap_irq_chip tps65090_irq_chip = {
 134         .name = "tps65090",
 135         .irqs = tps65090_irqs,
 136         .num_irqs = ARRAY_SIZE(tps65090_irqs),
 137         .num_regs = NUM_INT_REG,
 138         .status_base = TPS65090_REG_INTR_STS,
 139         .mask_base = TPS65090_REG_INTR_MASK,
 140         .mask_invert = true,
 141 };
 142
 143 static bool is_volatile_reg(struct device *dev, unsigned int reg)
 144 {
 145         /* Nearly all registers have status bits mixed in, except a few */
 146         switch (reg) {
 147         case TPS65090_REG_INTR_MASK:
 148         case TPS65090_REG_INTR_MASK2:
 149         case TPS65090_REG_CG_CTRL0:
 150         case TPS65090_REG_CG_CTRL1:
 151         case TPS65090_REG_CG_CTRL2:
 152         case TPS65090_REG_CG_CTRL3:
 153         case TPS65090_REG_CG_CTRL4:
 154         case TPS65090_REG_CG_CTRL5:
 155                 return false;
 156         }
 157         return true;
 158 }
 159
 160 static const struct regmap_config tps65090_regmap_config = {
 161         .reg_bits = 8,
 162         .val_bits = 8,
 163         .max_register = TPS65090_MAX_REG,
 164         .num_reg_defaults_raw = TPS65090_NUM_REGS,
 165         .cache_type = REGCACHE_RBTREE,
 166         .volatile_reg = is_volatile_reg,
 167 };
 168
 169 #ifdef CONFIG_OF
 170 static const struct of_device_id tps65090_of_match[] = {
 171         { .compatible = "ti,tps65090",},
 172         {},
 173 };
 174 MODULE_DEVICE_TABLE(of, tps65090_of_match);
 175 #endif
 176
 177 static int tps65090_i2c_probe(struct i2c_client *client,
 178                               const struct i2c_device_id *id)
 179 {
 180         struct tps65090_platform_data *pdata = dev_get_platdata(&client->dev);
 181         int irq_base = 0;
 182         struct tps65090 *tps65090;
 183         int ret;
 184
 185         if (!pdata && !client->dev.of_node) {
 186                 dev_err(&client->dev,
 187                         "tps65090 requires platform data or of_node\n");
 188                 return -EINVAL;
 189         }
 190
 191         if (pdata)
 192                 irq_base = pdata->irq_base;
 193
 194         tps65090 = devm_kzalloc(&client->dev, sizeof(*tps65090), GFP_KERNEL);
 195         if (!tps65090) {
 196                 dev_err(&client->dev, "mem alloc for tps65090 failed\n");
 197                 return -ENOMEM;
 198         }
 199
 200         tps65090->dev = &client->dev;
 201         i2c_set_clientdata(client, tps65090);
 202
 203         tps65090->rmap = devm_regmap_init_i2c(client, &tps65090_regmap_config);
 204         if (IS_ERR(tps65090->rmap)) {
 205                 ret = PTR_ERR(tps65090->rmap);
 206                 dev_err(&client->dev, "regmap_init failed with err: %d\n", ret);
 207                 return ret;
 208         }
 209
 210         if (client->irq) {
 211                 ret = regmap_add_irq_chip(tps65090->rmap, client->irq,
 212                                           IRQF_ONESHOT | IRQF_TRIGGER_LOW, irq_base,
 213                                           &tps65090_irq_chip, &tps65090->irq_data);
 214                 if (ret) {
 215                         dev_err(&client->dev,
 216                                 "IRQ init failed with err: %d\n", ret);
 217                         return ret;
 218                 }
 219         } else {
 220                 /* Don't tell children they have an IRQ that'll never fire */
 221                 tps65090s[CHARGER].num_resources = 0;
 222         }
 223
 224         ret = mfd_add_devices(tps65090->dev, -1, tps65090s,
 225                               ARRAY_SIZE(tps65090s), NULL,
 226                               0, regmap_irq_get_domain(tps65090->irq_data));
 227         if (ret) {
 228                 dev_err(&client->dev, "add mfd devices failed with err: %d\n",
 229                         ret);
 230                 goto err_irq_exit;
 231         }
 232
 233         return 0;
 234
 235 err_irq_exit:
 236         if (client->irq)
 237                 regmap_del_irq_chip(client->irq, tps65090->irq_data);
 238         return ret;
 239 }
 240
 241 static int tps65090_i2c_remove(struct i2c_client *client)
 242 {
 243         struct tps65090 *tps65090 = i2c_get_clientdata(client);
 244
 245         mfd_remove_devices(tps65090->dev);
 246         if (client->irq)
 247                 regmap_del_irq_chip(client->irq, tps65090->irq_data);
 248
 249         return 0;
 250 }
 251
 252 static const struct i2c_device_id tps65090_id_table[] = {
 253         { "tps65090", 0 },
 254         { },
 255 };
 256 MODULE_DEVICE_TABLE(i2c, tps65090_id_table);
 257
 258 static struct i2c_driver tps65090_driver = {
 259         .driver = {
 260                 .name   = "tps65090",
 261                 .of_match_table = of_match_ptr(tps65090_of_match),
 262         },
 263         .probe          = tps65090_i2c_probe,
 264         .remove         = tps65090_i2c_remove,
 265         .id_table       = tps65090_id_table,
 266 };
 267
 268 static int __init tps65090_init(void)
 269 {
 270         return i2c_add_driver(&tps65090_driver);
 271 }
 272 subsys_initcall(tps65090_init);
 273
 274 static void __exit tps65090_exit(void)
 275 {
 276         i2c_del_driver(&tps65090_driver);
 277 }
 278 module_exit(tps65090_exit);
 279
 280 MODULE_DESCRIPTION("TPS65090 core driver");
 281 MODULE_AUTHOR("Venu Byravarasu <vbyravarasu@nvidia.com>");
 282 MODULE_LICENSE("GPL v2");