1// SPDX-License-Identifier: GPL-2.0-or-later
2//
3// Copyright (C) 2018 ROHM Semiconductors
4//
5// ROHM BD71837MWV and BD71847MWV PMIC driver
6//
7// Datasheet for BD71837MWV available from
8// https://www.rohm.com/datasheet/BD71837MWV/bd71837mwv-e
9
10#include <linux/gpio_keys.h>
11#include <linux/i2c.h>
12#include <linux/input.h>
13#include <linux/interrupt.h>
14#include <linux/mfd/rohm-bd718x7.h>
15#include <linux/mfd/core.h>
16#include <linux/module.h>
17#include <linux/of_device.h>
18#include <linux/regmap.h>
19#include <linux/types.h>
20
21static struct gpio_keys_button button = {
22 .code = KEY_POWER,
23 .gpio = -1,
24 .type = EV_KEY,
25};
26
27static struct gpio_keys_platform_data bd718xx_powerkey_data = {
28 .buttons = &button,
29 .nbuttons = 1,
30 .name = "bd718xx-pwrkey",
31};
32
33static struct mfd_cell bd718xx_mfd_cells[] = {
34 {
35 .name = "gpio-keys",
36 .platform_data = &bd718xx_powerkey_data,
37 .pdata_size = sizeof(bd718xx_powerkey_data),
38 },
39 { .name = "bd718xx-clk", },
40 { .name = "bd718xx-pmic", },
41};
42
43static const struct regmap_irq bd718xx_irqs[] = {
44 REGMAP_IRQ_REG(BD718XX_INT_SWRST, 0, BD718XX_INT_SWRST_MASK),
45 REGMAP_IRQ_REG(BD718XX_INT_PWRBTN_S, 0, BD718XX_INT_PWRBTN_S_MASK),
46 REGMAP_IRQ_REG(BD718XX_INT_PWRBTN_L, 0, BD718XX_INT_PWRBTN_L_MASK),
47 REGMAP_IRQ_REG(BD718XX_INT_PWRBTN, 0, BD718XX_INT_PWRBTN_MASK),
48 REGMAP_IRQ_REG(BD718XX_INT_WDOG, 0, BD718XX_INT_WDOG_MASK),
49 REGMAP_IRQ_REG(BD718XX_INT_ON_REQ, 0, BD718XX_INT_ON_REQ_MASK),
50 REGMAP_IRQ_REG(BD718XX_INT_STBY_REQ, 0, BD718XX_INT_STBY_REQ_MASK),
51};
52
53static struct regmap_irq_chip bd718xx_irq_chip = {
54 .name = "bd718xx-irq",
55 .irqs = bd718xx_irqs,
56 .num_irqs = ARRAY_SIZE(bd718xx_irqs),
57 .num_regs = 1,
58 .irq_reg_stride = 1,
59 .status_base = BD718XX_REG_IRQ,
60 .mask_base = BD718XX_REG_MIRQ,
61 .ack_base = BD718XX_REG_IRQ,
62 .init_ack_masked = true,
63 .mask_invert = false,
64};
65
66static const struct regmap_range pmic_status_range = {
67 .range_min = BD718XX_REG_IRQ,
68 .range_max = BD718XX_REG_POW_STATE,
69};
70
71static const struct regmap_access_table volatile_regs = {
72 .yes_ranges = &pmic_status_range,
73 .n_yes_ranges = 1,
74};
75
76static const struct regmap_config bd718xx_regmap_config = {
77 .reg_bits = 8,
78 .val_bits = 8,
79 .volatile_table = &volatile_regs,
80 .max_register = BD718XX_MAX_REGISTER - 1,
81 .cache_type = REGCACHE_RBTREE,
82};
83
84static int bd718xx_i2c_probe(struct i2c_client *i2c,
85 const struct i2c_device_id *id)
86{
87 struct bd718xx *bd718xx;
88 int ret;
89
90 if (!i2c->irq) {
91 dev_err(&i2c->dev, "No IRQ configured\n");
92 return -EINVAL;
93 }
94
95 bd718xx = devm_kzalloc(&i2c->dev, sizeof(struct bd718xx), GFP_KERNEL);
96
97 if (!bd718xx)
98 return -ENOMEM;
99
100 bd718xx->chip_irq = i2c->irq;
101 bd718xx->chip_type = (unsigned int)(uintptr_t)
102 of_device_get_match_data(&i2c->dev);
103 bd718xx->dev = &i2c->dev;
104 dev_set_drvdata(&i2c->dev, bd718xx);
105
106 bd718xx->regmap = devm_regmap_init_i2c(i2c, &bd718xx_regmap_config);
107 if (IS_ERR(bd718xx->regmap)) {
108 dev_err(&i2c->dev, "regmap initialization failed\n");
109 return PTR_ERR(bd718xx->regmap);
110 }
111
112 ret = devm_regmap_add_irq_chip(&i2c->dev, bd718xx->regmap,
113 bd718xx->chip_irq, IRQF_ONESHOT, 0,
114 &bd718xx_irq_chip, &bd718xx->irq_data);
115 if (ret) {
116 dev_err(&i2c->dev, "Failed to add irq_chip\n");
117 return ret;
118 }
119
120 /* Configure short press to 10 milliseconds */
121 ret = regmap_update_bits(bd718xx->regmap,
122 BD718XX_REG_PWRONCONFIG0,
123 BD718XX_PWRBTN_PRESS_DURATION_MASK,
124 BD718XX_PWRBTN_SHORT_PRESS_10MS);
125 if (ret) {
126 dev_err(&i2c->dev,
127 "Failed to configure button short press timeout\n");
128 return ret;
129 }
130
131 /* Configure long press to 10 seconds */
132 ret = regmap_update_bits(bd718xx->regmap,
133 BD718XX_REG_PWRONCONFIG1,
134 BD718XX_PWRBTN_PRESS_DURATION_MASK,
135 BD718XX_PWRBTN_LONG_PRESS_10S);
136
137 if (ret) {
138 dev_err(&i2c->dev,
139 "Failed to configure button long press timeout\n");
140 return ret;
141 }
142
143 ret = regmap_irq_get_virq(bd718xx->irq_data, BD718XX_INT_PWRBTN_S);
144
145 if (ret < 0) {
146 dev_err(&i2c->dev, "Failed to get the IRQ\n");
147 return ret;
148 }
149
150 button.irq = ret;
151
152 ret = devm_mfd_add_devices(bd718xx->dev, PLATFORM_DEVID_AUTO,
153 bd718xx_mfd_cells,
154 ARRAY_SIZE(bd718xx_mfd_cells), NULL, 0,
155 regmap_irq_get_domain(bd718xx->irq_data));
156 if (ret)
157 dev_err(&i2c->dev, "Failed to create subdevices\n");
158
159 return ret;
160}
161
162static const struct of_device_id bd718xx_of_match[] = {
163 {
164 .compatible = "rohm,bd71837",
165 .data = (void *)BD718XX_TYPE_BD71837,
166 },
167 {
168 .compatible = "rohm,bd71847",
169 .data = (void *)BD718XX_TYPE_BD71847,
170 },
171 { }
172};
173MODULE_DEVICE_TABLE(of, bd718xx_of_match);
174
175static struct i2c_driver bd718xx_i2c_driver = {
176 .driver = {
177 .name = "rohm-bd718x7",
178 .of_match_table = bd718xx_of_match,
179 },
180 .probe = bd718xx_i2c_probe,
181};
182
183static int __init bd718xx_i2c_init(void)
184{
185 return i2c_add_driver(&bd718xx_i2c_driver);
186}
187
188/* Initialise early so consumer devices can complete system boot */
189subsys_initcall(bd718xx_i2c_init);
190
191static void __exit bd718xx_i2c_exit(void)
192{
193 i2c_del_driver(&bd718xx_i2c_driver);
194}
195module_exit(bd718xx_i2c_exit);
196
197MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>");
198MODULE_DESCRIPTION("ROHM BD71837/BD71847 Power Management IC driver");
199MODULE_LICENSE("GPL");
200