drivers/mfd/tps65086.c

0001 // SPDX-License-Identifier: GPL-2.0-only
0002 /*
0003  * Copyright (C) 2015 Texas Instruments Incorporated - https://www.ti.com/
0004  *  Andrew F. Davis <afd@ti.com>
0005  *
0006  * Based on the TPS65912 driver
0007  */
0008
0009 #include <linux/i2c.h>
0010 #include <linux/interrupt.h>
0011 #include <linux/mfd/core.h>
0012 #include <linux/module.h>
0013
0014 #include <linux/mfd/tps65086.h>
0015
0016 static const struct mfd_cell tps65086_cells[] = {
0017     { .name = "tps65086-regulator", },
0018     { .name = "tps65086-gpio", },
0019     { .name = "tps65086-reset", },
0020 };
0021
0022 static const struct regmap_range tps65086_yes_ranges[] = {
0023     regmap_reg_range(TPS65086_IRQ, TPS65086_IRQ),
0024     regmap_reg_range(TPS65086_PMICSTAT, TPS65086_SHUTDNSRC),
0025     regmap_reg_range(TPS65086_GPOCTRL, TPS65086_GPOCTRL),
0026     regmap_reg_range(TPS65086_PG_STATUS1, TPS65086_OC_STATUS),
0027 };
0028
0029 static const struct regmap_access_table tps65086_volatile_table = {
0030     .yes_ranges = tps65086_yes_ranges,
0031     .n_yes_ranges = ARRAY_SIZE(tps65086_yes_ranges),
0032 };
0033
0034 static const struct regmap_config tps65086_regmap_config = {
0035     .reg_bits = 8,
0036     .val_bits = 8,
0037     .cache_type = REGCACHE_RBTREE,
0038     .volatile_table = &tps65086_volatile_table,
0039 };
0040
0041 static const struct regmap_irq tps65086_irqs[] = {
0042     REGMAP_IRQ_REG(TPS65086_IRQ_DIETEMP, 0, TPS65086_IRQ_DIETEMP_MASK),
0043     REGMAP_IRQ_REG(TPS65086_IRQ_SHUTDN, 0, TPS65086_IRQ_SHUTDN_MASK),
0044     REGMAP_IRQ_REG(TPS65086_IRQ_FAULT, 0, TPS65086_IRQ_FAULT_MASK),
0045 };
0046
0047 static struct regmap_irq_chip tps65086_irq_chip = {
0048     .name = "tps65086",
0049     .status_base = TPS65086_IRQ,
0050     .mask_base = TPS65086_IRQ_MASK,
0051     .ack_base = TPS65086_IRQ,
0052     .init_ack_masked = true,
0053     .num_regs = 1,
0054     .irqs = tps65086_irqs,
0055     .num_irqs = ARRAY_SIZE(tps65086_irqs),
0056 };
0057
0058 static const struct of_device_id tps65086_of_match_table[] = {
0059     { .compatible = "ti,tps65086", },
0060     { /* sentinel */ }
0061 };
0062 MODULE_DEVICE_TABLE(of, tps65086_of_match_table);
0063
0064 static int tps65086_probe(struct i2c_client *client,
0065               const struct i2c_device_id *ids)
0066 {
0067     struct tps65086 *tps;
0068     unsigned int version;
0069     int ret;
0070
0071     tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
0072     if (!tps)
0073         return -ENOMEM;
0074
0075     i2c_set_clientdata(client, tps);
0076     tps->dev = &client->dev;
0077     tps->irq = client->irq;
0078
0079     tps->regmap = devm_regmap_init_i2c(client, &tps65086_regmap_config);
0080     if (IS_ERR(tps->regmap)) {
0081         dev_err(tps->dev, "Failed to initialize register map\n");
0082         return PTR_ERR(tps->regmap);
0083     }
0084
0085     ret = regmap_read(tps->regmap, TPS65086_DEVICEID, &version);
0086     if (ret) {
0087         dev_err(tps->dev, "Failed to read revision register\n");
0088         return ret;
0089     }
0090
0091     dev_info(tps->dev, "Device: TPS65086%01lX, OTP: %c, Rev: %ld\n",
0092          (version & TPS65086_DEVICEID_PART_MASK),
0093          (char)((version & TPS65086_DEVICEID_OTP_MASK) >> 4) + 'A',
0094          (version & TPS65086_DEVICEID_REV_MASK) >> 6);
0095
0096     if (tps->irq > 0) {
0097         ret = regmap_add_irq_chip(tps->regmap, tps->irq, IRQF_ONESHOT, 0,
0098                       &tps65086_irq_chip, &tps->irq_data);
0099         if (ret) {
0100             dev_err(tps->dev, "Failed to register IRQ chip\n");
0101             return ret;
0102         }
0103     }
0104
0105     ret = mfd_add_devices(tps->dev, PLATFORM_DEVID_AUTO, tps65086_cells,
0106                   ARRAY_SIZE(tps65086_cells), NULL, 0,
0107                   regmap_irq_get_domain(tps->irq_data));
0108     if (ret && tps->irq > 0)
0109         regmap_del_irq_chip(tps->irq, tps->irq_data);
0110
0111     return ret;
0112 }
0113
0114 static int tps65086_remove(struct i2c_client *client)
0115 {
0116     struct tps65086 *tps = i2c_get_clientdata(client);
0117
0118     if (tps->irq > 0)
0119         regmap_del_irq_chip(tps->irq, tps->irq_data);
0120
0121     return 0;
0122 }
0123
0124 static const struct i2c_device_id tps65086_id_table[] = {
0125     { "tps65086", 0 },
0126     { /* sentinel */ }
0127 };
0128 MODULE_DEVICE_TABLE(i2c, tps65086_id_table);
0129
0130 static struct i2c_driver tps65086_driver = {
0131     .driver     = {
0132         .name   = "tps65086",
0133         .of_match_table = tps65086_of_match_table,
0134     },
0135     .probe      = tps65086_probe,
0136     .remove     = tps65086_remove,
0137     .id_table       = tps65086_id_table,
0138 };
0139 module_i2c_driver(tps65086_driver);
0140
0141 MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>");
0142 MODULE_DESCRIPTION("TPS65086 PMIC Driver");
0143 MODULE_LICENSE("GPL v2");