LXR linux/drivers/mfd/tps65086.c

   1/*
   2 * Copyright (C) 2015 Texas Instruments Incorporated - https://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
  24static const struct mfd_cell tps65086_cells[] = {
  25        { .name = "tps65086-regulator", },
  26        { .name = "tps65086-gpio", },
  27        { .name = "tps65086-reset", },
  28};
  29
  30static const struct regmap_range tps65086_yes_ranges[] = {
  31        regmap_reg_range(TPS65086_IRQ, TPS65086_IRQ),
  32        regmap_reg_range(TPS65086_PMICSTAT, TPS65086_SHUTDNSRC),
  33        regmap_reg_range(TPS65086_GPOCTRL, TPS65086_GPOCTRL),
  34        regmap_reg_range(TPS65086_PG_STATUS1, TPS65086_OC_STATUS),
  35};
  36
  37static const struct regmap_access_table tps65086_volatile_table = {
  38        .yes_ranges = tps65086_yes_ranges,
  39        .n_yes_ranges = ARRAY_SIZE(tps65086_yes_ranges),
  40};
  41
  42static const struct regmap_config tps65086_regmap_config = {
  43        .reg_bits = 8,
  44        .val_bits = 8,
  45        .cache_type = REGCACHE_RBTREE,
  46        .volatile_table = &tps65086_volatile_table,
  47};
  48
  49static const struct regmap_irq tps65086_irqs[] = {
  50        REGMAP_IRQ_REG(TPS65086_IRQ_DIETEMP, 0, TPS65086_IRQ_DIETEMP_MASK),
  51        REGMAP_IRQ_REG(TPS65086_IRQ_SHUTDN, 0, TPS65086_IRQ_SHUTDN_MASK),
  52        REGMAP_IRQ_REG(TPS65086_IRQ_FAULT, 0, TPS65086_IRQ_FAULT_MASK),
  53};
  54
  55static struct regmap_irq_chip tps65086_irq_chip = {
  56        .name = "tps65086",
  57        .status_base = TPS65086_IRQ,
  58        .mask_base = TPS65086_IRQ_MASK,
  59        .ack_base = TPS65086_IRQ,
  60        .init_ack_masked = true,
  61        .num_regs = 1,
  62        .irqs = tps65086_irqs,
  63        .num_irqs = ARRAY_SIZE(tps65086_irqs),
  64};
  65
  66static const struct of_device_id tps65086_of_match_table[] = {
  67        { .compatible = "ti,tps65086", },
  68        { /* sentinel */ }
  69};
  70MODULE_DEVICE_TABLE(of, tps65086_of_match_table);
  71
  72static int tps65086_probe(struct i2c_client *client,
  73                          const struct i2c_device_id *ids)
  74{
  75        struct tps65086 *tps;
  76        unsigned int version;
  77        int ret;
  78
  79        tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
  80        if (!tps)
  81                return -ENOMEM;
  82
  83        i2c_set_clientdata(client, tps);
  84        tps->dev = &client->dev;
  85        tps->irq = client->irq;
  86
  87        tps->regmap = devm_regmap_init_i2c(client, &tps65086_regmap_config);
  88        if (IS_ERR(tps->regmap)) {
  89                dev_err(tps->dev, "Failed to initialize register map\n");
  90                return PTR_ERR(tps->regmap);
  91        }
  92
  93        ret = regmap_read(tps->regmap, TPS65086_DEVICEID, &version);
  94        if (ret) {
  95                dev_err(tps->dev, "Failed to read revision register\n");
  96                return ret;
  97        }
  98
  99        dev_info(tps->dev, "Device: TPS65086%01lX, OTP: %c, Rev: %ld\n",
 100                 (version & TPS65086_DEVICEID_PART_MASK),
 101                 (char)((version & TPS65086_DEVICEID_OTP_MASK) >> 4) + 'A',
 102                 (version & TPS65086_DEVICEID_REV_MASK) >> 6);
 103
 104        if (tps->irq > 0) {
 105                ret = regmap_add_irq_chip(tps->regmap, tps->irq, IRQF_ONESHOT, 0,
 106                                          &tps65086_irq_chip, &tps->irq_data);
 107                if (ret) {
 108                        dev_err(tps->dev, "Failed to register IRQ chip\n");
 109                        return ret;
 110                }
 111        }
 112
 113        ret = mfd_add_devices(tps->dev, PLATFORM_DEVID_AUTO, tps65086_cells,
 114                              ARRAY_SIZE(tps65086_cells), NULL, 0,
 115                              regmap_irq_get_domain(tps->irq_data));
 116        if (ret && tps->irq > 0)
 117                regmap_del_irq_chip(tps->irq, tps->irq_data);
 118
 119        return ret;
 120}
 121
 122static int tps65086_remove(struct i2c_client *client)
 123{
 124        struct tps65086 *tps = i2c_get_clientdata(client);
 125
 126        if (tps->irq > 0)
 127                regmap_del_irq_chip(tps->irq, tps->irq_data);
 128
 129        return 0;
 130}
 131
 132static const struct i2c_device_id tps65086_id_table[] = {
 133        { "tps65086", 0 },
 134        { /* sentinel */ }
 135};
 136MODULE_DEVICE_TABLE(i2c, tps65086_id_table);
 137
 138static struct i2c_driver tps65086_driver = {
 139        .driver         = {
 140                .name   = "tps65086",
 141                .of_match_table = tps65086_of_match_table,
 142        },
 143        .probe          = tps65086_probe,
 144        .remove         = tps65086_remove,
 145        .id_table       = tps65086_id_table,
 146};
 147module_i2c_driver(tps65086_driver);
 148
 149MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>");
 150MODULE_DESCRIPTION("TPS65086 PMIC Driver");
 151MODULE_LICENSE("GPL v2");
 152