drivers/mfd/tps65086.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (C) 2015 Texas Instruments Incorporated - https://www.ti.com/
   4  *      Andrew F. Davis <afd@ti.com>
   5  *
   6  * Based on the TPS65912 driver
   7  */
   8
   9 #include <linux/i2c.h>
  10 #include <linux/interrupt.h>
  11 #include <linux/mfd/core.h>
  12 #include <linux/module.h>
  13
  14 #include <linux/mfd/tps65086.h>
  15
  16 static const struct mfd_cell tps65086_cells[] = {
  17         { .name = "tps65086-regulator", },
  18         { .name = "tps65086-gpio", },
  19         { .name = "tps65086-reset", },
  20 };
  21
  22 static const struct regmap_range tps65086_yes_ranges[] = {
  23         regmap_reg_range(TPS65086_IRQ, TPS65086_IRQ),
  24         regmap_reg_range(TPS65086_PMICSTAT, TPS65086_SHUTDNSRC),
  25         regmap_reg_range(TPS65086_GPOCTRL, TPS65086_GPOCTRL),
  26         regmap_reg_range(TPS65086_PG_STATUS1, TPS65086_OC_STATUS),
  27 };
  28
  29 static const struct regmap_access_table tps65086_volatile_table = {
  30         .yes_ranges = tps65086_yes_ranges,
  31         .n_yes_ranges = ARRAY_SIZE(tps65086_yes_ranges),
  32 };
  33
  34 static const struct regmap_config tps65086_regmap_config = {
  35         .reg_bits = 8,
  36         .val_bits = 8,
  37         .cache_type = REGCACHE_MAPLE,
  38         .volatile_table = &tps65086_volatile_table,
  39         .max_register = TPS65086_OC_STATUS,
  40 };
  41
  42 static const struct regmap_irq tps65086_irqs[] = {
  43         REGMAP_IRQ_REG(TPS65086_IRQ_DIETEMP, 0, TPS65086_IRQ_DIETEMP_MASK),
  44         REGMAP_IRQ_REG(TPS65086_IRQ_SHUTDN, 0, TPS65086_IRQ_SHUTDN_MASK),
  45         REGMAP_IRQ_REG(TPS65086_IRQ_FAULT, 0, TPS65086_IRQ_FAULT_MASK),
  46 };
  47
  48 static const struct regmap_irq_chip tps65086_irq_chip = {
  49         .name = "tps65086",
  50         .status_base = TPS65086_IRQ,
  51         .mask_base = TPS65086_IRQ_MASK,
  52         .ack_base = TPS65086_IRQ,
  53         .init_ack_masked = true,
  54         .num_regs = 1,
  55         .irqs = tps65086_irqs,
  56         .num_irqs = ARRAY_SIZE(tps65086_irqs),
  57 };
  58
  59 static const struct of_device_id tps65086_of_match_table[] = {
  60         { .compatible = "ti,tps65086", },
  61         { /* sentinel */ }
  62 };
  63 MODULE_DEVICE_TABLE(of, tps65086_of_match_table);
  64
  65 static int tps65086_probe(struct i2c_client *client)
  66 {
  67         struct tps65086 *tps;
  68         unsigned int version;
  69         int ret;
  70
  71         tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
  72         if (!tps)
  73                 return -ENOMEM;
  74
  75         i2c_set_clientdata(client, tps);
  76         tps->dev = &client->dev;
  77         tps->irq = client->irq;
  78
  79         tps->regmap = devm_regmap_init_i2c(client, &tps65086_regmap_config);
  80         if (IS_ERR(tps->regmap)) {
  81                 dev_err(tps->dev, "Failed to initialize register map\n");
  82                 return PTR_ERR(tps->regmap);
  83         }
  84
  85         /* Store device ID to load regulator configuration that fit to IC variant */
  86         ret = regmap_read(tps->regmap, TPS65086_DEVICEID1, &tps->chip_id);
  87         if (ret) {
  88                 dev_err(tps->dev, "Failed to read revision register 1\n");
  89                 return ret;
  90         }
  91
  92         ret = regmap_read(tps->regmap, TPS65086_DEVICEID2, &version);
  93         if (ret) {
  94                 dev_err(tps->dev, "Failed to read revision register 2\n");
  95                 return ret;
  96         }
  97
  98         dev_info(tps->dev, "Device: TPS65086%01lX, OTP: %c, Rev: %ld\n",
  99                  (version & TPS65086_DEVICEID2_PART_MASK),
 100                  (char)((version & TPS65086_DEVICEID2_OTP_MASK) >> 4) + 'A',
 101                  (version & TPS65086_DEVICEID2_REV_MASK) >> 6);
 102
 103         if (tps->irq > 0) {
 104                 ret = regmap_add_irq_chip(tps->regmap, tps->irq, IRQF_ONESHOT, 0,
 105                                           &tps65086_irq_chip, &tps->irq_data);
 106                 if (ret) {
 107                         dev_err(tps->dev, "Failed to register IRQ chip\n");
 108                         return ret;
 109                 }
 110         }
 111
 112         ret = mfd_add_devices(tps->dev, PLATFORM_DEVID_AUTO, tps65086_cells,
 113                               ARRAY_SIZE(tps65086_cells), NULL, 0,
 114                               regmap_irq_get_domain(tps->irq_data));
 115         if (ret && tps->irq > 0)
 116                 regmap_del_irq_chip(tps->irq, tps->irq_data);
 117
 118         return ret;
 119 }
 120
 121 static void tps65086_remove(struct i2c_client *client)
 122 {
 123         struct tps65086 *tps = i2c_get_clientdata(client);
 124
 125         if (tps->irq > 0)
 126                 regmap_del_irq_chip(tps->irq, tps->irq_data);
 127 }
 128
 129 static const struct i2c_device_id tps65086_id_table[] = {
 130         { "tps65086" },
 131         { /* sentinel */ }
 132 };
 133 MODULE_DEVICE_TABLE(i2c, tps65086_id_table);
 134
 135 static struct i2c_driver tps65086_driver = {
 136         .driver         = {
 137                 .name   = "tps65086",
 138                 .of_match_table = tps65086_of_match_table,
 139         },
 140         .probe          = tps65086_probe,
 141         .remove         = tps65086_remove,
 142         .id_table       = tps65086_id_table,
 143 };
 144 module_i2c_driver(tps65086_driver);
 145
 146 MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>");
 147 MODULE_DESCRIPTION("TPS65086 PMIC Driver");
 148 MODULE_LICENSE("GPL v2");