// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2015 Texas Instruments Incorporated - https://www.ti.com/
 *      Andrew F. Davis <afd@ti.com>
 *
 * Based on the TPS65912 driver
 */

#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/mfd/core.h>
#include <linux/module.h>

#include <linux/mfd/tps65086.h>

static const struct mfd_cell tps65086_cells[] = {
        { .name = "tps65086-regulator", },
        { .name = "tps65086-gpio", },
        { .name = "tps65086-reset", },
};

static const struct regmap_range tps65086_yes_ranges[] = {
        regmap_reg_range(TPS65086_IRQ, TPS65086_IRQ),
        regmap_reg_range(TPS65086_PMICSTAT, TPS65086_SHUTDNSRC),
        regmap_reg_range(TPS65086_GPOCTRL, TPS65086_GPOCTRL),
        regmap_reg_range(TPS65086_PG_STATUS1, TPS65086_OC_STATUS),
};

static const struct regmap_access_table tps65086_volatile_table = {
        .yes_ranges = tps65086_yes_ranges,
        .n_yes_ranges = ARRAY_SIZE(tps65086_yes_ranges),
};

static const struct regmap_config tps65086_regmap_config = {
        .reg_bits = 8,
        .val_bits = 8,
        .cache_type = REGCACHE_MAPLE,
        .volatile_table = &tps65086_volatile_table,
        .max_register = TPS65086_OC_STATUS,
};

static const struct regmap_irq tps65086_irqs[] = {
        REGMAP_IRQ_REG(TPS65086_IRQ_DIETEMP, 0, TPS65086_IRQ_DIETEMP_MASK),
        REGMAP_IRQ_REG(TPS65086_IRQ_SHUTDN, 0, TPS65086_IRQ_SHUTDN_MASK),
        REGMAP_IRQ_REG(TPS65086_IRQ_FAULT, 0, TPS65086_IRQ_FAULT_MASK),
};

static const struct regmap_irq_chip tps65086_irq_chip = {
        .name = "tps65086",
        .status_base = TPS65086_IRQ,
        .mask_base = TPS65086_IRQ_MASK,
        .ack_base = TPS65086_IRQ,
        .init_ack_masked = true,
        .num_regs = 1,
        .irqs = tps65086_irqs,
        .num_irqs = ARRAY_SIZE(tps65086_irqs),
};

static const struct of_device_id tps65086_of_match_table[] = {
        { .compatible = "ti,tps65086", },
        { /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, tps65086_of_match_table);

static int tps65086_probe(struct i2c_client *client)
{
        struct tps65086 *tps;
        unsigned int version;
        int ret;

        tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
        if (!tps)
                return -ENOMEM;

        i2c_set_clientdata(client, tps);
        tps->dev = &client->dev;
        tps->irq = client->irq;

        tps->regmap = devm_regmap_init_i2c(client, &tps65086_regmap_config);
        if (IS_ERR(tps->regmap)) {
                dev_err(tps->dev, "Failed to initialize register map\n");
                return PTR_ERR(tps->regmap);
        }

        /* Store device ID to load regulator configuration that fit to IC variant */
        ret = regmap_read(tps->regmap, TPS65086_DEVICEID1, &tps->chip_id);
        if (ret) {
                dev_err(tps->dev, "Failed to read revision register 1\n");
                return ret;
        }

        ret = regmap_read(tps->regmap, TPS65086_DEVICEID2, &version);
        if (ret) {
                dev_err(tps->dev, "Failed to read revision register 2\n");
                return ret;
        }

        dev_info(tps->dev, "Device: TPS65086%01lX, OTP: %c, Rev: %ld\n",
                 (version & TPS65086_DEVICEID2_PART_MASK),
                 (char)((version & TPS65086_DEVICEID2_OTP_MASK) >> 4) + 'A',
                 (version & TPS65086_DEVICEID2_REV_MASK) >> 6);

        if (tps->irq > 0) {
                ret = regmap_add_irq_chip(tps->regmap, tps->irq, IRQF_ONESHOT, 0,
                                          &tps65086_irq_chip, &tps->irq_data);
                if (ret) {
                        dev_err(tps->dev, "Failed to register IRQ chip\n");
                        return ret;
                }
        }

        ret = mfd_add_devices(tps->dev, PLATFORM_DEVID_AUTO, tps65086_cells,
                              ARRAY_SIZE(tps65086_cells), NULL, 0,
                              regmap_irq_get_domain(tps->irq_data));
        if (ret && tps->irq > 0)
                regmap_del_irq_chip(tps->irq, tps->irq_data);

        return ret;
}

static void tps65086_remove(struct i2c_client *client)
{
        struct tps65086 *tps = i2c_get_clientdata(client);

        if (tps->irq > 0)
                regmap_del_irq_chip(tps->irq, tps->irq_data);
}

static const struct i2c_device_id tps65086_id_table[] = {
        { "tps65086" },
        { /* sentinel */ }
};
MODULE_DEVICE_TABLE(i2c, tps65086_id_table);

static struct i2c_driver tps65086_driver = {
        .driver         = {
                .name   = "tps65086",
                .of_match_table = tps65086_of_match_table,
        },
        .probe          = tps65086_probe,
        .remove         = tps65086_remove,
        .id_table       = tps65086_id_table,
};
module_i2c_driver(tps65086_driver);

MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>");
MODULE_DESCRIPTION("TPS65086 PMIC Driver");
MODULE_LICENSE("GPL v2");