drivers/mfd/tps65086.c

   1 /*
   2  * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/
   3  *      Andrew F. Davis <afd@ti.com>
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed "as is" WITHOUT ANY WARRANTY of any
  10  * kind, whether expressed or implied; without even the implied warranty
  11  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License version 2 for more details.
  13  *
  14  * Based on the TPS65912 driver
  15  */
  16
  17 #include <linux/i2c.h>
  18 #include <linux/interrupt.h>
  19 #include <linux/mfd/core.h>
  20 #include <linux/module.h>
  21
  22 #include <linux/mfd/tps65086.h>
  23
  24 static const struct mfd_cell tps65086_cells[] = {
  25         { .name = "tps65086-regulator", },
  26         { .name = "tps65086-gpio", },
  27 };
  28
  29 static const struct regmap_range tps65086_yes_ranges[] = {
  30         regmap_reg_range(TPS65086_IRQ, TPS65086_IRQ),
  31         regmap_reg_range(TPS65086_PMICSTAT, TPS65086_SHUTDNSRC),
  32         regmap_reg_range(TPS65086_GPOCTRL, TPS65086_GPOCTRL),
  33         regmap_reg_range(TPS65086_PG_STATUS1, TPS65086_OC_STATUS),
  34 };
  35
  36 static const struct regmap_access_table tps65086_volatile_table = {
  37         .yes_ranges = tps65086_yes_ranges,
  38         .n_yes_ranges = ARRAY_SIZE(tps65086_yes_ranges),
  39 };
  40
  41 static const struct regmap_config tps65086_regmap_config = {
  42         .reg_bits = 8,
  43         .val_bits = 8,
  44         .cache_type = REGCACHE_RBTREE,
  45         .volatile_table = &tps65086_volatile_table,
  46 };
  47
  48 static const struct regmap_irq tps65086_irqs[] = {
  49         REGMAP_IRQ_REG(TPS65086_IRQ_DIETEMP, 0, TPS65086_IRQ_DIETEMP_MASK),
  50         REGMAP_IRQ_REG(TPS65086_IRQ_SHUTDN, 0, TPS65086_IRQ_SHUTDN_MASK),
  51         REGMAP_IRQ_REG(TPS65086_IRQ_FAULT, 0, TPS65086_IRQ_FAULT_MASK),
  52 };
  53
  54 static struct regmap_irq_chip tps65086_irq_chip = {
  55         .name = "tps65086",
  56         .status_base = TPS65086_IRQ,
  57         .mask_base = TPS65086_IRQ_MASK,
  58         .ack_base = TPS65086_IRQ,
  59         .init_ack_masked = true,
  60         .num_regs = 1,
  61         .irqs = tps65086_irqs,
  62         .num_irqs = ARRAY_SIZE(tps65086_irqs),
  63 };
  64
  65 static const struct of_device_id tps65086_of_match_table[] = {
  66         { .compatible = "ti,tps65086", },
  67         { /* sentinel */ }
  68 };
  69 MODULE_DEVICE_TABLE(of, tps65086_of_match_table);
  70
  71 static int tps65086_probe(struct i2c_client *client,
  72                           const struct i2c_device_id *ids)
  73 {
  74         struct tps65086 *tps;
  75         unsigned int version;
  76         int ret;
  77
  78         tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
  79         if (!tps)
  80                 return -ENOMEM;
  81
  82         i2c_set_clientdata(client, tps);
  83         tps->dev = &client->dev;
  84         tps->irq = client->irq;
  85
  86         tps->regmap = devm_regmap_init_i2c(client, &tps65086_regmap_config);
  87         if (IS_ERR(tps->regmap)) {
  88                 dev_err(tps->dev, "Failed to initialize register map\n");
  89                 return PTR_ERR(tps->regmap);
  90         }
  91
  92         ret = regmap_read(tps->regmap, TPS65086_DEVICEID, &version);
  93         if (ret) {
  94                 dev_err(tps->dev, "Failed to read revision register\n");
  95                 return ret;
  96         }
  97
  98         dev_info(tps->dev, "Device: TPS65086%01lX, OTP: %c, Rev: %ld\n",
  99                  (version & TPS65086_DEVICEID_PART_MASK),
 100                  (char)((version & TPS65086_DEVICEID_OTP_MASK) >> 4) + 'A',
 101                  (version & TPS65086_DEVICEID_REV_MASK) >> 6);
 102
 103         ret = regmap_add_irq_chip(tps->regmap, tps->irq, IRQF_ONESHOT, 0,
 104                                   &tps65086_irq_chip, &tps->irq_data);
 105         if (ret) {
 106                 dev_err(tps->dev, "Failed to register IRQ chip\n");
 107                 return ret;
 108         }
 109
 110         ret = mfd_add_devices(tps->dev, PLATFORM_DEVID_AUTO, tps65086_cells,
 111                               ARRAY_SIZE(tps65086_cells), NULL, 0,
 112                               regmap_irq_get_domain(tps->irq_data));
 113         if (ret) {
 114                 regmap_del_irq_chip(tps->irq, tps->irq_data);
 115                 return ret;
 116         }
 117
 118         return 0;
 119 }
 120
 121 static int tps65086_remove(struct i2c_client *client)
 122 {
 123         struct tps65086 *tps = i2c_get_clientdata(client);
 124
 125         regmap_del_irq_chip(tps->irq, tps->irq_data);
 126
 127         return 0;
 128 }
 129
 130 static const struct i2c_device_id tps65086_id_table[] = {
 131         { "tps65086", 0 },
 132         { /* sentinel */ }
 133 };
 134 MODULE_DEVICE_TABLE(i2c, tps65086_id_table);
 135
 136 static struct i2c_driver tps65086_driver = {
 137         .driver         = {
 138                 .name   = "tps65086",
 139                 .of_match_table = tps65086_of_match_table,
 140         },
 141         .probe          = tps65086_probe,
 142         .remove         = tps65086_remove,
 143         .id_table       = tps65086_id_table,
 144 };
 145 module_i2c_driver(tps65086_driver);
 146
 147 MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>");
 148 MODULE_DESCRIPTION("TPS65086 PMIC Driver");
 149 MODULE_LICENSE("GPL v2");