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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 |
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8 | // https://www.rohm.com/datasheet/BD71837MWV/bd71837mwv-e |
9 | ||
494edd26 | 10 | #include <linux/gpio_keys.h> |
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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> |
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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 | ||
dd2be639 | 33 | static struct mfd_cell bd718xx_mfd_cells[] = { |
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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 = "bd718xx-clk", }, |
40 | { .name = "bd718xx-pmic", }, | |
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41 | }; |
42 | ||
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43 | static 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), | |
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51 | }; |
52 | ||
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53 | static struct regmap_irq_chip bd718xx_irq_chip = { |
54 | .name = "bd718xx-irq", | |
55 | .irqs = bd718xx_irqs, | |
56 | .num_irqs = ARRAY_SIZE(bd718xx_irqs), | |
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57 | .num_regs = 1, |
58 | .irq_reg_stride = 1, | |
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59 | .status_base = BD718XX_REG_IRQ, |
60 | .mask_base = BD718XX_REG_MIRQ, | |
61 | .ack_base = BD718XX_REG_IRQ, | |
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62 | .init_ack_masked = true, |
63 | .mask_invert = false, | |
64 | }; | |
65 | ||
66 | static const struct regmap_range pmic_status_range = { | |
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67 | .range_min = BD718XX_REG_IRQ, |
68 | .range_max = BD718XX_REG_POW_STATE, | |
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69 | }; |
70 | ||
71 | static const struct regmap_access_table volatile_regs = { | |
72 | .yes_ranges = &pmic_status_range, | |
73 | .n_yes_ranges = 1, | |
74 | }; | |
75 | ||
dd2be639 | 76 | static const struct regmap_config bd718xx_regmap_config = { |
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77 | .reg_bits = 8, |
78 | .val_bits = 8, | |
79 | .volatile_table = &volatile_regs, | |
494edd26 | 80 | .max_register = BD718XX_MAX_REGISTER - 1, |
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81 | .cache_type = REGCACHE_RBTREE, |
82 | }; | |
83 | ||
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84 | static int bd718xx_init_press_duration(struct bd718xx *bd718xx) |
85 | { | |
86 | struct device* dev = bd718xx->chip.dev; | |
87 | u32 short_press_ms, long_press_ms; | |
88 | u32 short_press_value, long_press_value; | |
89 | int ret; | |
90 | ||
91 | ret = of_property_read_u32(dev->of_node, "rohm,short-press-ms", | |
92 | &short_press_ms); | |
93 | if (!ret) { | |
94 | short_press_value = min(15u, (short_press_ms + 250) / 500); | |
95 | ret = regmap_update_bits(bd718xx->chip.regmap, | |
96 | BD718XX_REG_PWRONCONFIG0, | |
97 | BD718XX_PWRBTN_PRESS_DURATION_MASK, | |
98 | short_press_value); | |
99 | if (ret) { | |
100 | dev_err(dev, "Failed to init pwron short press\n"); | |
101 | return ret; | |
102 | } | |
103 | } | |
104 | ||
105 | ret = of_property_read_u32(dev->of_node, "rohm,long-press-ms", | |
106 | &long_press_ms); | |
107 | if (!ret) { | |
108 | long_press_value = min(15u, (long_press_ms + 500) / 1000); | |
109 | ret = regmap_update_bits(bd718xx->chip.regmap, | |
110 | BD718XX_REG_PWRONCONFIG1, | |
111 | BD718XX_PWRBTN_PRESS_DURATION_MASK, | |
112 | long_press_value); | |
113 | if (ret) { | |
114 | dev_err(dev, "Failed to init pwron long press\n"); | |
115 | return ret; | |
116 | } | |
117 | } | |
118 | ||
119 | return 0; | |
120 | } | |
121 | ||
dd2be639 | 122 | static int bd718xx_i2c_probe(struct i2c_client *i2c, |
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123 | const struct i2c_device_id *id) |
124 | { | |
dd2be639 | 125 | struct bd718xx *bd718xx; |
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126 | int ret; |
127 | ||
128 | if (!i2c->irq) { | |
129 | dev_err(&i2c->dev, "No IRQ configured\n"); | |
130 | return -EINVAL; | |
131 | } | |
30107fa6 | 132 | |
dd2be639 | 133 | bd718xx = devm_kzalloc(&i2c->dev, sizeof(struct bd718xx), GFP_KERNEL); |
30107fa6 | 134 | |
dd2be639 | 135 | if (!bd718xx) |
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136 | return -ENOMEM; |
137 | ||
dd2be639 | 138 | bd718xx->chip_irq = i2c->irq; |
2a6a7aac | 139 | bd718xx->chip.chip_type = (unsigned int)(uintptr_t) |
494edd26 | 140 | of_device_get_match_data(&i2c->dev); |
2a6a7aac | 141 | bd718xx->chip.dev = &i2c->dev; |
dd2be639 | 142 | dev_set_drvdata(&i2c->dev, bd718xx); |
30107fa6 | 143 | |
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144 | bd718xx->chip.regmap = devm_regmap_init_i2c(i2c, |
145 | &bd718xx_regmap_config); | |
146 | if (IS_ERR(bd718xx->chip.regmap)) { | |
30107fa6 | 147 | dev_err(&i2c->dev, "regmap initialization failed\n"); |
2a6a7aac | 148 | return PTR_ERR(bd718xx->chip.regmap); |
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149 | } |
150 | ||
2a6a7aac | 151 | ret = devm_regmap_add_irq_chip(&i2c->dev, bd718xx->chip.regmap, |
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152 | bd718xx->chip_irq, IRQF_ONESHOT, 0, |
153 | &bd718xx_irq_chip, &bd718xx->irq_data); | |
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154 | if (ret) { |
155 | dev_err(&i2c->dev, "Failed to add irq_chip\n"); | |
156 | return ret; | |
157 | } | |
158 | ||
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159 | ret = bd718xx_init_press_duration(bd718xx); |
160 | if (ret) | |
161 | return ret; | |
162 | ||
dd2be639 | 163 | ret = regmap_irq_get_virq(bd718xx->irq_data, BD718XX_INT_PWRBTN_S); |
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164 | |
165 | if (ret < 0) { | |
166 | dev_err(&i2c->dev, "Failed to get the IRQ\n"); | |
167 | return ret; | |
168 | } | |
169 | ||
170 | button.irq = ret; | |
171 | ||
2a6a7aac | 172 | ret = devm_mfd_add_devices(bd718xx->chip.dev, PLATFORM_DEVID_AUTO, |
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173 | bd718xx_mfd_cells, |
174 | ARRAY_SIZE(bd718xx_mfd_cells), NULL, 0, | |
175 | regmap_irq_get_domain(bd718xx->irq_data)); | |
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176 | if (ret) |
177 | dev_err(&i2c->dev, "Failed to create subdevices\n"); | |
178 | ||
179 | return ret; | |
180 | } | |
181 | ||
dd2be639 | 182 | static const struct of_device_id bd718xx_of_match[] = { |
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183 | { |
184 | .compatible = "rohm,bd71837", | |
2a6a7aac | 185 | .data = (void *)ROHM_CHIP_TYPE_BD71837, |
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186 | }, |
187 | { | |
188 | .compatible = "rohm,bd71847", | |
2a6a7aac | 189 | .data = (void *)ROHM_CHIP_TYPE_BD71847, |
494edd26 | 190 | }, |
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191 | { } |
192 | }; | |
dd2be639 | 193 | MODULE_DEVICE_TABLE(of, bd718xx_of_match); |
30107fa6 | 194 | |
dd2be639 | 195 | static struct i2c_driver bd718xx_i2c_driver = { |
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196 | .driver = { |
197 | .name = "rohm-bd718x7", | |
dd2be639 | 198 | .of_match_table = bd718xx_of_match, |
30107fa6 | 199 | }, |
dd2be639 | 200 | .probe = bd718xx_i2c_probe, |
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201 | }; |
202 | ||
dd2be639 | 203 | static int __init bd718xx_i2c_init(void) |
30107fa6 | 204 | { |
dd2be639 | 205 | return i2c_add_driver(&bd718xx_i2c_driver); |
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206 | } |
207 | ||
208 | /* Initialise early so consumer devices can complete system boot */ | |
dd2be639 | 209 | subsys_initcall(bd718xx_i2c_init); |
30107fa6 | 210 | |
dd2be639 | 211 | static void __exit bd718xx_i2c_exit(void) |
30107fa6 | 212 | { |
dd2be639 | 213 | i2c_del_driver(&bd718xx_i2c_driver); |
30107fa6 | 214 | } |
dd2be639 | 215 | module_exit(bd718xx_i2c_exit); |
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216 | |
217 | MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>"); | |
dd2be639 | 218 | MODULE_DESCRIPTION("ROHM BD71837/BD71847 Power Management IC driver"); |
30107fa6 | 219 | MODULE_LICENSE("GPL"); |