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1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | // | |
3 | // Copyright (C) 2018 ROHM Semiconductors | |
4 | // | |
dd2be639 | 5 | // ROHM BD71837MWV and BD71847MWV PMIC driver |
30107fa6 | 6 | // |
dd2be639 | 7 | // Datasheet for BD71837MWV available from |
30107fa6 MV |
8 | // https://www.rohm.com/datasheet/BD71837MWV/bd71837mwv-e |
9 | ||
494edd26 | 10 | #include <linux/gpio_keys.h> |
30107fa6 MV |
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> | |
494edd26 | 17 | #include <linux/of_device.h> |
30107fa6 | 18 | #include <linux/regmap.h> |
494edd26 | 19 | #include <linux/types.h> |
30107fa6 MV |
20 | |
21 | static struct gpio_keys_button button = { | |
22 | .code = KEY_POWER, | |
23 | .gpio = -1, | |
24 | .type = EV_KEY, | |
25 | }; | |
26 | ||
27 | static struct gpio_keys_platform_data bd718xx_powerkey_data = { | |
28 | .buttons = &button, | |
29 | .nbuttons = 1, | |
30 | .name = "bd718xx-pwrkey", | |
31 | }; | |
32 | ||
1b1c26b2 | 33 | static struct mfd_cell bd71837_mfd_cells[] = { |
30107fa6 MV |
34 | { |
35 | .name = "gpio-keys", | |
36 | .platform_data = &bd718xx_powerkey_data, | |
37 | .pdata_size = sizeof(bd718xx_powerkey_data), | |
38 | }, | |
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39 | { .name = "bd71837-clk", }, |
40 | { .name = "bd71837-pmic", }, | |
41 | }; | |
42 | ||
43 | static struct mfd_cell bd71847_mfd_cells[] = { | |
44 | { | |
45 | .name = "gpio-keys", | |
46 | .platform_data = &bd718xx_powerkey_data, | |
47 | .pdata_size = sizeof(bd718xx_powerkey_data), | |
48 | }, | |
49 | { .name = "bd71847-clk", }, | |
50 | { .name = "bd71847-pmic", }, | |
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51 | }; |
52 | ||
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53 | static const struct regmap_irq bd718xx_irqs[] = { |
54 | REGMAP_IRQ_REG(BD718XX_INT_SWRST, 0, BD718XX_INT_SWRST_MASK), | |
55 | REGMAP_IRQ_REG(BD718XX_INT_PWRBTN_S, 0, BD718XX_INT_PWRBTN_S_MASK), | |
56 | REGMAP_IRQ_REG(BD718XX_INT_PWRBTN_L, 0, BD718XX_INT_PWRBTN_L_MASK), | |
57 | REGMAP_IRQ_REG(BD718XX_INT_PWRBTN, 0, BD718XX_INT_PWRBTN_MASK), | |
58 | REGMAP_IRQ_REG(BD718XX_INT_WDOG, 0, BD718XX_INT_WDOG_MASK), | |
59 | REGMAP_IRQ_REG(BD718XX_INT_ON_REQ, 0, BD718XX_INT_ON_REQ_MASK), | |
60 | REGMAP_IRQ_REG(BD718XX_INT_STBY_REQ, 0, BD718XX_INT_STBY_REQ_MASK), | |
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61 | }; |
62 | ||
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63 | static struct regmap_irq_chip bd718xx_irq_chip = { |
64 | .name = "bd718xx-irq", | |
65 | .irqs = bd718xx_irqs, | |
66 | .num_irqs = ARRAY_SIZE(bd718xx_irqs), | |
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67 | .num_regs = 1, |
68 | .irq_reg_stride = 1, | |
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69 | .status_base = BD718XX_REG_IRQ, |
70 | .mask_base = BD718XX_REG_MIRQ, | |
71 | .ack_base = BD718XX_REG_IRQ, | |
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72 | .init_ack_masked = true, |
73 | .mask_invert = false, | |
74 | }; | |
75 | ||
76 | static const struct regmap_range pmic_status_range = { | |
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77 | .range_min = BD718XX_REG_IRQ, |
78 | .range_max = BD718XX_REG_POW_STATE, | |
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79 | }; |
80 | ||
81 | static const struct regmap_access_table volatile_regs = { | |
82 | .yes_ranges = &pmic_status_range, | |
83 | .n_yes_ranges = 1, | |
84 | }; | |
85 | ||
dd2be639 | 86 | static const struct regmap_config bd718xx_regmap_config = { |
30107fa6 MV |
87 | .reg_bits = 8, |
88 | .val_bits = 8, | |
89 | .volatile_table = &volatile_regs, | |
494edd26 | 90 | .max_register = BD718XX_MAX_REGISTER - 1, |
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91 | .cache_type = REGCACHE_RBTREE, |
92 | }; | |
93 | ||
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94 | static int bd718xx_init_press_duration(struct regmap *regmap, |
95 | struct device *dev) | |
e25547f8 | 96 | { |
e25547f8 LC |
97 | u32 short_press_ms, long_press_ms; |
98 | u32 short_press_value, long_press_value; | |
99 | int ret; | |
100 | ||
101 | ret = of_property_read_u32(dev->of_node, "rohm,short-press-ms", | |
102 | &short_press_ms); | |
103 | if (!ret) { | |
104 | short_press_value = min(15u, (short_press_ms + 250) / 500); | |
316d0d92 | 105 | ret = regmap_update_bits(regmap, BD718XX_REG_PWRONCONFIG0, |
e25547f8 LC |
106 | BD718XX_PWRBTN_PRESS_DURATION_MASK, |
107 | short_press_value); | |
108 | if (ret) { | |
109 | dev_err(dev, "Failed to init pwron short press\n"); | |
110 | return ret; | |
111 | } | |
112 | } | |
113 | ||
114 | ret = of_property_read_u32(dev->of_node, "rohm,long-press-ms", | |
115 | &long_press_ms); | |
116 | if (!ret) { | |
117 | long_press_value = min(15u, (long_press_ms + 500) / 1000); | |
316d0d92 | 118 | ret = regmap_update_bits(regmap, BD718XX_REG_PWRONCONFIG1, |
e25547f8 LC |
119 | BD718XX_PWRBTN_PRESS_DURATION_MASK, |
120 | long_press_value); | |
121 | if (ret) { | |
122 | dev_err(dev, "Failed to init pwron long press\n"); | |
123 | return ret; | |
124 | } | |
125 | } | |
126 | ||
127 | return 0; | |
128 | } | |
129 | ||
dd2be639 | 130 | static int bd718xx_i2c_probe(struct i2c_client *i2c, |
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131 | const struct i2c_device_id *id) |
132 | { | |
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133 | struct regmap *regmap; |
134 | struct regmap_irq_chip_data *irq_data; | |
494edd26 | 135 | int ret; |
1b1c26b2 MV |
136 | unsigned int chip_type; |
137 | struct mfd_cell *mfd; | |
138 | int cells; | |
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139 | |
140 | if (!i2c->irq) { | |
141 | dev_err(&i2c->dev, "No IRQ configured\n"); | |
142 | return -EINVAL; | |
143 | } | |
1b1c26b2 MV |
144 | chip_type = (unsigned int)(uintptr_t) |
145 | of_device_get_match_data(&i2c->dev); | |
146 | switch (chip_type) { | |
147 | case ROHM_CHIP_TYPE_BD71837: | |
148 | mfd = bd71837_mfd_cells; | |
149 | cells = ARRAY_SIZE(bd71837_mfd_cells); | |
150 | break; | |
151 | case ROHM_CHIP_TYPE_BD71847: | |
152 | mfd = bd71847_mfd_cells; | |
153 | cells = ARRAY_SIZE(bd71847_mfd_cells); | |
154 | break; | |
155 | default: | |
156 | dev_err(&i2c->dev, "Unknown device type"); | |
157 | return -EINVAL; | |
158 | } | |
30107fa6 | 159 | |
316d0d92 MV |
160 | regmap = devm_regmap_init_i2c(i2c, &bd718xx_regmap_config); |
161 | if (IS_ERR(regmap)) { | |
30107fa6 | 162 | dev_err(&i2c->dev, "regmap initialization failed\n"); |
316d0d92 | 163 | return PTR_ERR(regmap); |
30107fa6 MV |
164 | } |
165 | ||
316d0d92 MV |
166 | ret = devm_regmap_add_irq_chip(&i2c->dev, regmap, i2c->irq, |
167 | IRQF_ONESHOT, 0, &bd718xx_irq_chip, | |
168 | &irq_data); | |
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169 | if (ret) { |
170 | dev_err(&i2c->dev, "Failed to add irq_chip\n"); | |
171 | return ret; | |
172 | } | |
173 | ||
316d0d92 | 174 | ret = bd718xx_init_press_duration(regmap, &i2c->dev); |
e25547f8 LC |
175 | if (ret) |
176 | return ret; | |
177 | ||
316d0d92 | 178 | ret = regmap_irq_get_virq(irq_data, BD718XX_INT_PWRBTN_S); |
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179 | |
180 | if (ret < 0) { | |
181 | dev_err(&i2c->dev, "Failed to get the IRQ\n"); | |
182 | return ret; | |
183 | } | |
184 | ||
185 | button.irq = ret; | |
186 | ||
316d0d92 | 187 | ret = devm_mfd_add_devices(&i2c->dev, PLATFORM_DEVID_AUTO, |
1b1c26b2 | 188 | mfd, cells, NULL, 0, |
316d0d92 | 189 | regmap_irq_get_domain(irq_data)); |
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190 | if (ret) |
191 | dev_err(&i2c->dev, "Failed to create subdevices\n"); | |
192 | ||
193 | return ret; | |
194 | } | |
195 | ||
dd2be639 | 196 | static const struct of_device_id bd718xx_of_match[] = { |
494edd26 MV |
197 | { |
198 | .compatible = "rohm,bd71837", | |
2a6a7aac | 199 | .data = (void *)ROHM_CHIP_TYPE_BD71837, |
494edd26 MV |
200 | }, |
201 | { | |
202 | .compatible = "rohm,bd71847", | |
2a6a7aac | 203 | .data = (void *)ROHM_CHIP_TYPE_BD71847, |
494edd26 | 204 | }, |
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205 | { |
206 | .compatible = "rohm,bd71850", | |
207 | .data = (void *)ROHM_CHIP_TYPE_BD71847, | |
208 | }, | |
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209 | { } |
210 | }; | |
dd2be639 | 211 | MODULE_DEVICE_TABLE(of, bd718xx_of_match); |
30107fa6 | 212 | |
dd2be639 | 213 | static struct i2c_driver bd718xx_i2c_driver = { |
30107fa6 MV |
214 | .driver = { |
215 | .name = "rohm-bd718x7", | |
dd2be639 | 216 | .of_match_table = bd718xx_of_match, |
30107fa6 | 217 | }, |
dd2be639 | 218 | .probe = bd718xx_i2c_probe, |
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219 | }; |
220 | ||
dd2be639 | 221 | static int __init bd718xx_i2c_init(void) |
30107fa6 | 222 | { |
dd2be639 | 223 | return i2c_add_driver(&bd718xx_i2c_driver); |
30107fa6 MV |
224 | } |
225 | ||
226 | /* Initialise early so consumer devices can complete system boot */ | |
dd2be639 | 227 | subsys_initcall(bd718xx_i2c_init); |
30107fa6 | 228 | |
dd2be639 | 229 | static void __exit bd718xx_i2c_exit(void) |
30107fa6 | 230 | { |
dd2be639 | 231 | i2c_del_driver(&bd718xx_i2c_driver); |
30107fa6 | 232 | } |
dd2be639 | 233 | module_exit(bd718xx_i2c_exit); |
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234 | |
235 | MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>"); | |
dd2be639 | 236 | MODULE_DESCRIPTION("ROHM BD71837/BD71847 Power Management IC driver"); |
30107fa6 | 237 | MODULE_LICENSE("GPL"); |