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d3ea2127 MV |
1 | /* |
2 | * ROHM BD9571MWV-M MFD driver | |
3 | * | |
4 | * Copyright (C) 2017 Marek Vasut <marek.vasut+renesas@gmail.com> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed "as is" WITHOUT ANY WARRANTY of any | |
11 | * kind, whether expressed or implied; without even the implied warranty | |
12 | * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License version 2 for more details. | |
14 | * | |
15 | * Based on the TPS65086 driver | |
16 | */ | |
17 | ||
18 | #include <linux/i2c.h> | |
19 | #include <linux/interrupt.h> | |
20 | #include <linux/mfd/core.h> | |
21 | #include <linux/module.h> | |
22 | ||
23 | #include <linux/mfd/bd9571mwv.h> | |
24 | ||
25 | static const struct mfd_cell bd9571mwv_cells[] = { | |
26 | { .name = "bd9571mwv-regulator", }, | |
27 | { .name = "bd9571mwv-gpio", }, | |
28 | }; | |
29 | ||
30 | static const struct regmap_range bd9571mwv_readable_yes_ranges[] = { | |
31 | regmap_reg_range(BD9571MWV_VENDOR_CODE, BD9571MWV_PRODUCT_REVISION), | |
7b569bcb | 32 | regmap_reg_range(BD9571MWV_BKUP_MODE_CNT, BD9571MWV_BKUP_MODE_CNT), |
d3ea2127 MV |
33 | regmap_reg_range(BD9571MWV_AVS_SET_MONI, BD9571MWV_AVS_DVFS_VID(3)), |
34 | regmap_reg_range(BD9571MWV_VD18_VID, BD9571MWV_VD33_VID), | |
35 | regmap_reg_range(BD9571MWV_DVFS_VINIT, BD9571MWV_DVFS_VINIT), | |
36 | regmap_reg_range(BD9571MWV_DVFS_SETVMAX, BD9571MWV_DVFS_MONIVDAC), | |
37 | regmap_reg_range(BD9571MWV_GPIO_IN, BD9571MWV_GPIO_IN), | |
38 | regmap_reg_range(BD9571MWV_GPIO_INT, BD9571MWV_GPIO_INTMASK), | |
39 | regmap_reg_range(BD9571MWV_INT_INTREQ, BD9571MWV_INT_INTMASK), | |
40 | }; | |
41 | ||
42 | static const struct regmap_access_table bd9571mwv_readable_table = { | |
43 | .yes_ranges = bd9571mwv_readable_yes_ranges, | |
44 | .n_yes_ranges = ARRAY_SIZE(bd9571mwv_readable_yes_ranges), | |
45 | }; | |
46 | ||
47 | static const struct regmap_range bd9571mwv_writable_yes_ranges[] = { | |
7b569bcb | 48 | regmap_reg_range(BD9571MWV_BKUP_MODE_CNT, BD9571MWV_BKUP_MODE_CNT), |
d3ea2127 MV |
49 | regmap_reg_range(BD9571MWV_AVS_VD09_VID(0), BD9571MWV_AVS_VD09_VID(3)), |
50 | regmap_reg_range(BD9571MWV_DVFS_SETVID, BD9571MWV_DVFS_SETVID), | |
51 | regmap_reg_range(BD9571MWV_GPIO_DIR, BD9571MWV_GPIO_OUT), | |
52 | regmap_reg_range(BD9571MWV_GPIO_INT_SET, BD9571MWV_GPIO_INTMASK), | |
53 | regmap_reg_range(BD9571MWV_INT_INTREQ, BD9571MWV_INT_INTMASK), | |
54 | }; | |
55 | ||
56 | static const struct regmap_access_table bd9571mwv_writable_table = { | |
57 | .yes_ranges = bd9571mwv_writable_yes_ranges, | |
58 | .n_yes_ranges = ARRAY_SIZE(bd9571mwv_writable_yes_ranges), | |
59 | }; | |
60 | ||
61 | static const struct regmap_range bd9571mwv_volatile_yes_ranges[] = { | |
b0aff01e | 62 | regmap_reg_range(BD9571MWV_DVFS_MONIVDAC, BD9571MWV_DVFS_MONIVDAC), |
d3ea2127 MV |
63 | regmap_reg_range(BD9571MWV_GPIO_IN, BD9571MWV_GPIO_IN), |
64 | regmap_reg_range(BD9571MWV_GPIO_INT, BD9571MWV_GPIO_INT), | |
65 | regmap_reg_range(BD9571MWV_INT_INTREQ, BD9571MWV_INT_INTREQ), | |
66 | }; | |
67 | ||
68 | static const struct regmap_access_table bd9571mwv_volatile_table = { | |
69 | .yes_ranges = bd9571mwv_volatile_yes_ranges, | |
70 | .n_yes_ranges = ARRAY_SIZE(bd9571mwv_volatile_yes_ranges), | |
71 | }; | |
72 | ||
73 | static const struct regmap_config bd9571mwv_regmap_config = { | |
74 | .reg_bits = 8, | |
75 | .val_bits = 8, | |
76 | .cache_type = REGCACHE_RBTREE, | |
77 | .rd_table = &bd9571mwv_readable_table, | |
78 | .wr_table = &bd9571mwv_writable_table, | |
79 | .volatile_table = &bd9571mwv_volatile_table, | |
80 | .max_register = 0xff, | |
81 | }; | |
82 | ||
83 | static const struct regmap_irq bd9571mwv_irqs[] = { | |
84 | REGMAP_IRQ_REG(BD9571MWV_IRQ_MD1, 0, | |
85 | BD9571MWV_INT_INTREQ_MD1_INT), | |
86 | REGMAP_IRQ_REG(BD9571MWV_IRQ_MD2_E1, 0, | |
87 | BD9571MWV_INT_INTREQ_MD2_E1_INT), | |
88 | REGMAP_IRQ_REG(BD9571MWV_IRQ_MD2_E2, 0, | |
89 | BD9571MWV_INT_INTREQ_MD2_E2_INT), | |
90 | REGMAP_IRQ_REG(BD9571MWV_IRQ_PROT_ERR, 0, | |
91 | BD9571MWV_INT_INTREQ_PROT_ERR_INT), | |
92 | REGMAP_IRQ_REG(BD9571MWV_IRQ_GP, 0, | |
93 | BD9571MWV_INT_INTREQ_GP_INT), | |
94 | REGMAP_IRQ_REG(BD9571MWV_IRQ_128H_OF, 0, | |
95 | BD9571MWV_INT_INTREQ_128H_OF_INT), | |
96 | REGMAP_IRQ_REG(BD9571MWV_IRQ_WDT_OF, 0, | |
97 | BD9571MWV_INT_INTREQ_WDT_OF_INT), | |
98 | REGMAP_IRQ_REG(BD9571MWV_IRQ_BKUP_TRG, 0, | |
99 | BD9571MWV_INT_INTREQ_BKUP_TRG_INT), | |
100 | }; | |
101 | ||
102 | static struct regmap_irq_chip bd9571mwv_irq_chip = { | |
103 | .name = "bd9571mwv", | |
104 | .status_base = BD9571MWV_INT_INTREQ, | |
105 | .mask_base = BD9571MWV_INT_INTMASK, | |
106 | .ack_base = BD9571MWV_INT_INTREQ, | |
107 | .init_ack_masked = true, | |
108 | .num_regs = 1, | |
109 | .irqs = bd9571mwv_irqs, | |
110 | .num_irqs = ARRAY_SIZE(bd9571mwv_irqs), | |
111 | }; | |
112 | ||
113 | static int bd9571mwv_identify(struct bd9571mwv *bd) | |
114 | { | |
115 | struct device *dev = bd->dev; | |
116 | unsigned int value; | |
117 | int ret; | |
118 | ||
119 | ret = regmap_read(bd->regmap, BD9571MWV_VENDOR_CODE, &value); | |
120 | if (ret) { | |
121 | dev_err(dev, "Failed to read vendor code register (ret=%i)\n", | |
122 | ret); | |
123 | return ret; | |
124 | } | |
125 | ||
126 | if (value != BD9571MWV_VENDOR_CODE_VAL) { | |
127 | dev_err(dev, "Invalid vendor code ID %02x (expected %02x)\n", | |
128 | value, BD9571MWV_VENDOR_CODE_VAL); | |
129 | return -EINVAL; | |
130 | } | |
131 | ||
132 | ret = regmap_read(bd->regmap, BD9571MWV_PRODUCT_CODE, &value); | |
133 | if (ret) { | |
134 | dev_err(dev, "Failed to read product code register (ret=%i)\n", | |
135 | ret); | |
136 | return ret; | |
137 | } | |
138 | ||
139 | if (value != BD9571MWV_PRODUCT_CODE_VAL) { | |
140 | dev_err(dev, "Invalid product code ID %02x (expected %02x)\n", | |
141 | value, BD9571MWV_PRODUCT_CODE_VAL); | |
142 | return -EINVAL; | |
143 | } | |
144 | ||
145 | ret = regmap_read(bd->regmap, BD9571MWV_PRODUCT_REVISION, &value); | |
146 | if (ret) { | |
147 | dev_err(dev, "Failed to read revision register (ret=%i)\n", | |
148 | ret); | |
149 | return ret; | |
150 | } | |
151 | ||
152 | dev_info(dev, "Device: BD9571MWV rev. %d\n", value & 0xff); | |
153 | ||
154 | return 0; | |
155 | } | |
156 | ||
157 | static int bd9571mwv_probe(struct i2c_client *client, | |
158 | const struct i2c_device_id *ids) | |
159 | { | |
160 | struct bd9571mwv *bd; | |
161 | int ret; | |
162 | ||
163 | bd = devm_kzalloc(&client->dev, sizeof(*bd), GFP_KERNEL); | |
164 | if (!bd) | |
165 | return -ENOMEM; | |
166 | ||
167 | i2c_set_clientdata(client, bd); | |
168 | bd->dev = &client->dev; | |
169 | bd->irq = client->irq; | |
170 | ||
171 | bd->regmap = devm_regmap_init_i2c(client, &bd9571mwv_regmap_config); | |
172 | if (IS_ERR(bd->regmap)) { | |
173 | dev_err(bd->dev, "Failed to initialize register map\n"); | |
174 | return PTR_ERR(bd->regmap); | |
175 | } | |
176 | ||
177 | ret = bd9571mwv_identify(bd); | |
178 | if (ret) | |
179 | return ret; | |
180 | ||
181 | ret = regmap_add_irq_chip(bd->regmap, bd->irq, IRQF_ONESHOT, 0, | |
182 | &bd9571mwv_irq_chip, &bd->irq_data); | |
183 | if (ret) { | |
184 | dev_err(bd->dev, "Failed to register IRQ chip\n"); | |
185 | return ret; | |
186 | } | |
187 | ||
188 | ret = mfd_add_devices(bd->dev, PLATFORM_DEVID_AUTO, bd9571mwv_cells, | |
189 | ARRAY_SIZE(bd9571mwv_cells), NULL, 0, | |
190 | regmap_irq_get_domain(bd->irq_data)); | |
191 | if (ret) { | |
192 | regmap_del_irq_chip(bd->irq, bd->irq_data); | |
193 | return ret; | |
194 | } | |
195 | ||
196 | return 0; | |
197 | } | |
198 | ||
199 | static int bd9571mwv_remove(struct i2c_client *client) | |
200 | { | |
201 | struct bd9571mwv *bd = i2c_get_clientdata(client); | |
202 | ||
203 | regmap_del_irq_chip(bd->irq, bd->irq_data); | |
204 | ||
205 | return 0; | |
206 | } | |
207 | ||
208 | static const struct of_device_id bd9571mwv_of_match_table[] = { | |
209 | { .compatible = "rohm,bd9571mwv", }, | |
210 | { /* sentinel */ } | |
211 | }; | |
212 | MODULE_DEVICE_TABLE(of, bd9571mwv_of_match_table); | |
213 | ||
214 | static const struct i2c_device_id bd9571mwv_id_table[] = { | |
215 | { "bd9571mwv", 0 }, | |
216 | { /* sentinel */ } | |
217 | }; | |
218 | MODULE_DEVICE_TABLE(i2c, bd9571mwv_id_table); | |
219 | ||
220 | static struct i2c_driver bd9571mwv_driver = { | |
221 | .driver = { | |
222 | .name = "bd9571mwv", | |
223 | .of_match_table = bd9571mwv_of_match_table, | |
224 | }, | |
225 | .probe = bd9571mwv_probe, | |
226 | .remove = bd9571mwv_remove, | |
227 | .id_table = bd9571mwv_id_table, | |
228 | }; | |
229 | module_i2c_driver(bd9571mwv_driver); | |
230 | ||
231 | MODULE_AUTHOR("Marek Vasut <marek.vasut+renesas@gmail.com>"); | |
232 | MODULE_DESCRIPTION("BD9571MWV PMIC Driver"); | |
233 | MODULE_LICENSE("GPL v2"); |