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
 16static const struct mfd_cell tps65086_cells[] = {
 17	{ .name = "tps65086-regulator", },
 18	{ .name = "tps65086-gpio", },
 19	{ .name = "tps65086-reset", },
 20};
 21
 22static 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
 29static 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
 34static const struct regmap_config tps65086_regmap_config = {
 35	.reg_bits = 8,
 36	.val_bits = 8,
 37	.cache_type = REGCACHE_RBTREE,
 38	.volatile_table = &tps65086_volatile_table,
 39};
 40
 41static const struct regmap_irq tps65086_irqs[] = {
 42	REGMAP_IRQ_REG(TPS65086_IRQ_DIETEMP, 0, TPS65086_IRQ_DIETEMP_MASK),
 43	REGMAP_IRQ_REG(TPS65086_IRQ_SHUTDN, 0, TPS65086_IRQ_SHUTDN_MASK),
 44	REGMAP_IRQ_REG(TPS65086_IRQ_FAULT, 0, TPS65086_IRQ_FAULT_MASK),
 45};
 46
 47static struct regmap_irq_chip tps65086_irq_chip = {
 48	.name = "tps65086",
 49	.status_base = TPS65086_IRQ,
 50	.mask_base = TPS65086_IRQ_MASK,
 51	.ack_base = TPS65086_IRQ,
 52	.init_ack_masked = true,
 53	.num_regs = 1,
 54	.irqs = tps65086_irqs,
 55	.num_irqs = ARRAY_SIZE(tps65086_irqs),
 56};
 57
 58static const struct of_device_id tps65086_of_match_table[] = {
 59	{ .compatible = "ti,tps65086", },
 60	{ /* sentinel */ }
 61};
 62MODULE_DEVICE_TABLE(of, tps65086_of_match_table);
 63
 64static int tps65086_probe(struct i2c_client *client)
 65{
 66	struct tps65086 *tps;
 67	unsigned int version;
 68	int ret;
 69
 70	tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
 71	if (!tps)
 72		return -ENOMEM;
 73
 74	i2c_set_clientdata(client, tps);
 75	tps->dev = &client->dev;
 76	tps->irq = client->irq;
 77
 78	tps->regmap = devm_regmap_init_i2c(client, &tps65086_regmap_config);
 79	if (IS_ERR(tps->regmap)) {
 80		dev_err(tps->dev, "Failed to initialize register map\n");
 81		return PTR_ERR(tps->regmap);
 82	}
 83
 84	ret = regmap_read(tps->regmap, TPS65086_DEVICEID, &version);
 85	if (ret) {
 86		dev_err(tps->dev, "Failed to read revision register\n");
 87		return ret;
 88	}
 89
 90	dev_info(tps->dev, "Device: TPS65086%01lX, OTP: %c, Rev: %ld\n",
 91		 (version & TPS65086_DEVICEID_PART_MASK),
 92		 (char)((version & TPS65086_DEVICEID_OTP_MASK) >> 4) + 'A',
 93		 (version & TPS65086_DEVICEID_REV_MASK) >> 6);
 94
 95	if (tps->irq > 0) {
 96		ret = regmap_add_irq_chip(tps->regmap, tps->irq, IRQF_ONESHOT, 0,
 97					  &tps65086_irq_chip, &tps->irq_data);
 98		if (ret) {
 99			dev_err(tps->dev, "Failed to register IRQ chip\n");
100			return ret;
101		}
102	}
103
104	ret = mfd_add_devices(tps->dev, PLATFORM_DEVID_AUTO, tps65086_cells,
105			      ARRAY_SIZE(tps65086_cells), NULL, 0,
106			      regmap_irq_get_domain(tps->irq_data));
107	if (ret && tps->irq > 0)
108		regmap_del_irq_chip(tps->irq, tps->irq_data);
109
110	return ret;
111}
112
113static void tps65086_remove(struct i2c_client *client)
114{
115	struct tps65086 *tps = i2c_get_clientdata(client);
116
117	if (tps->irq > 0)
118		regmap_del_irq_chip(tps->irq, tps->irq_data);
119}
120
121static const struct i2c_device_id tps65086_id_table[] = {
122	{ "tps65086", 0 },
123	{ /* sentinel */ }
124};
125MODULE_DEVICE_TABLE(i2c, tps65086_id_table);
126
127static struct i2c_driver tps65086_driver = {
128	.driver		= {
129		.name	= "tps65086",
130		.of_match_table = tps65086_of_match_table,
131	},
132	.probe_new	= tps65086_probe,
133	.remove		= tps65086_remove,
134	.id_table       = tps65086_id_table,
135};
136module_i2c_driver(tps65086_driver);
137
138MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>");
139MODULE_DESCRIPTION("TPS65086 PMIC Driver");
140MODULE_LICENSE("GPL v2");