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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), | |
32 | regmap_reg_range(BD9571MWV_AVS_SET_MONI, BD9571MWV_AVS_DVFS_VID(3)), | |
33 | regmap_reg_range(BD9571MWV_VD18_VID, BD9571MWV_VD33_VID), | |
34 | regmap_reg_range(BD9571MWV_DVFS_VINIT, BD9571MWV_DVFS_VINIT), | |
35 | regmap_reg_range(BD9571MWV_DVFS_SETVMAX, BD9571MWV_DVFS_MONIVDAC), | |
36 | regmap_reg_range(BD9571MWV_GPIO_IN, BD9571MWV_GPIO_IN), | |
37 | regmap_reg_range(BD9571MWV_GPIO_INT, BD9571MWV_GPIO_INTMASK), | |
38 | regmap_reg_range(BD9571MWV_INT_INTREQ, BD9571MWV_INT_INTMASK), | |
39 | }; | |
40 | ||
41 | static const struct regmap_access_table bd9571mwv_readable_table = { | |
42 | .yes_ranges = bd9571mwv_readable_yes_ranges, | |
43 | .n_yes_ranges = ARRAY_SIZE(bd9571mwv_readable_yes_ranges), | |
44 | }; | |
45 | ||
46 | static const struct regmap_range bd9571mwv_writable_yes_ranges[] = { | |
47 | regmap_reg_range(BD9571MWV_AVS_VD09_VID(0), BD9571MWV_AVS_VD09_VID(3)), | |
48 | regmap_reg_range(BD9571MWV_DVFS_SETVID, BD9571MWV_DVFS_SETVID), | |
49 | regmap_reg_range(BD9571MWV_GPIO_DIR, BD9571MWV_GPIO_OUT), | |
50 | regmap_reg_range(BD9571MWV_GPIO_INT_SET, BD9571MWV_GPIO_INTMASK), | |
51 | regmap_reg_range(BD9571MWV_INT_INTREQ, BD9571MWV_INT_INTMASK), | |
52 | }; | |
53 | ||
54 | static const struct regmap_access_table bd9571mwv_writable_table = { | |
55 | .yes_ranges = bd9571mwv_writable_yes_ranges, | |
56 | .n_yes_ranges = ARRAY_SIZE(bd9571mwv_writable_yes_ranges), | |
57 | }; | |
58 | ||
59 | static const struct regmap_range bd9571mwv_volatile_yes_ranges[] = { | |
60 | regmap_reg_range(BD9571MWV_GPIO_IN, BD9571MWV_GPIO_IN), | |
61 | regmap_reg_range(BD9571MWV_GPIO_INT, BD9571MWV_GPIO_INT), | |
62 | regmap_reg_range(BD9571MWV_INT_INTREQ, BD9571MWV_INT_INTREQ), | |
63 | }; | |
64 | ||
65 | static const struct regmap_access_table bd9571mwv_volatile_table = { | |
66 | .yes_ranges = bd9571mwv_volatile_yes_ranges, | |
67 | .n_yes_ranges = ARRAY_SIZE(bd9571mwv_volatile_yes_ranges), | |
68 | }; | |
69 | ||
70 | static const struct regmap_config bd9571mwv_regmap_config = { | |
71 | .reg_bits = 8, | |
72 | .val_bits = 8, | |
73 | .cache_type = REGCACHE_RBTREE, | |
74 | .rd_table = &bd9571mwv_readable_table, | |
75 | .wr_table = &bd9571mwv_writable_table, | |
76 | .volatile_table = &bd9571mwv_volatile_table, | |
77 | .max_register = 0xff, | |
78 | }; | |
79 | ||
80 | static const struct regmap_irq bd9571mwv_irqs[] = { | |
81 | REGMAP_IRQ_REG(BD9571MWV_IRQ_MD1, 0, | |
82 | BD9571MWV_INT_INTREQ_MD1_INT), | |
83 | REGMAP_IRQ_REG(BD9571MWV_IRQ_MD2_E1, 0, | |
84 | BD9571MWV_INT_INTREQ_MD2_E1_INT), | |
85 | REGMAP_IRQ_REG(BD9571MWV_IRQ_MD2_E2, 0, | |
86 | BD9571MWV_INT_INTREQ_MD2_E2_INT), | |
87 | REGMAP_IRQ_REG(BD9571MWV_IRQ_PROT_ERR, 0, | |
88 | BD9571MWV_INT_INTREQ_PROT_ERR_INT), | |
89 | REGMAP_IRQ_REG(BD9571MWV_IRQ_GP, 0, | |
90 | BD9571MWV_INT_INTREQ_GP_INT), | |
91 | REGMAP_IRQ_REG(BD9571MWV_IRQ_128H_OF, 0, | |
92 | BD9571MWV_INT_INTREQ_128H_OF_INT), | |
93 | REGMAP_IRQ_REG(BD9571MWV_IRQ_WDT_OF, 0, | |
94 | BD9571MWV_INT_INTREQ_WDT_OF_INT), | |
95 | REGMAP_IRQ_REG(BD9571MWV_IRQ_BKUP_TRG, 0, | |
96 | BD9571MWV_INT_INTREQ_BKUP_TRG_INT), | |
97 | }; | |
98 | ||
99 | static struct regmap_irq_chip bd9571mwv_irq_chip = { | |
100 | .name = "bd9571mwv", | |
101 | .status_base = BD9571MWV_INT_INTREQ, | |
102 | .mask_base = BD9571MWV_INT_INTMASK, | |
103 | .ack_base = BD9571MWV_INT_INTREQ, | |
104 | .init_ack_masked = true, | |
105 | .num_regs = 1, | |
106 | .irqs = bd9571mwv_irqs, | |
107 | .num_irqs = ARRAY_SIZE(bd9571mwv_irqs), | |
108 | }; | |
109 | ||
110 | static int bd9571mwv_identify(struct bd9571mwv *bd) | |
111 | { | |
112 | struct device *dev = bd->dev; | |
113 | unsigned int value; | |
114 | int ret; | |
115 | ||
116 | ret = regmap_read(bd->regmap, BD9571MWV_VENDOR_CODE, &value); | |
117 | if (ret) { | |
118 | dev_err(dev, "Failed to read vendor code register (ret=%i)\n", | |
119 | ret); | |
120 | return ret; | |
121 | } | |
122 | ||
123 | if (value != BD9571MWV_VENDOR_CODE_VAL) { | |
124 | dev_err(dev, "Invalid vendor code ID %02x (expected %02x)\n", | |
125 | value, BD9571MWV_VENDOR_CODE_VAL); | |
126 | return -EINVAL; | |
127 | } | |
128 | ||
129 | ret = regmap_read(bd->regmap, BD9571MWV_PRODUCT_CODE, &value); | |
130 | if (ret) { | |
131 | dev_err(dev, "Failed to read product code register (ret=%i)\n", | |
132 | ret); | |
133 | return ret; | |
134 | } | |
135 | ||
136 | if (value != BD9571MWV_PRODUCT_CODE_VAL) { | |
137 | dev_err(dev, "Invalid product code ID %02x (expected %02x)\n", | |
138 | value, BD9571MWV_PRODUCT_CODE_VAL); | |
139 | return -EINVAL; | |
140 | } | |
141 | ||
142 | ret = regmap_read(bd->regmap, BD9571MWV_PRODUCT_REVISION, &value); | |
143 | if (ret) { | |
144 | dev_err(dev, "Failed to read revision register (ret=%i)\n", | |
145 | ret); | |
146 | return ret; | |
147 | } | |
148 | ||
149 | dev_info(dev, "Device: BD9571MWV rev. %d\n", value & 0xff); | |
150 | ||
151 | return 0; | |
152 | } | |
153 | ||
154 | static int bd9571mwv_probe(struct i2c_client *client, | |
155 | const struct i2c_device_id *ids) | |
156 | { | |
157 | struct bd9571mwv *bd; | |
158 | int ret; | |
159 | ||
160 | bd = devm_kzalloc(&client->dev, sizeof(*bd), GFP_KERNEL); | |
161 | if (!bd) | |
162 | return -ENOMEM; | |
163 | ||
164 | i2c_set_clientdata(client, bd); | |
165 | bd->dev = &client->dev; | |
166 | bd->irq = client->irq; | |
167 | ||
168 | bd->regmap = devm_regmap_init_i2c(client, &bd9571mwv_regmap_config); | |
169 | if (IS_ERR(bd->regmap)) { | |
170 | dev_err(bd->dev, "Failed to initialize register map\n"); | |
171 | return PTR_ERR(bd->regmap); | |
172 | } | |
173 | ||
174 | ret = bd9571mwv_identify(bd); | |
175 | if (ret) | |
176 | return ret; | |
177 | ||
178 | ret = regmap_add_irq_chip(bd->regmap, bd->irq, IRQF_ONESHOT, 0, | |
179 | &bd9571mwv_irq_chip, &bd->irq_data); | |
180 | if (ret) { | |
181 | dev_err(bd->dev, "Failed to register IRQ chip\n"); | |
182 | return ret; | |
183 | } | |
184 | ||
185 | ret = mfd_add_devices(bd->dev, PLATFORM_DEVID_AUTO, bd9571mwv_cells, | |
186 | ARRAY_SIZE(bd9571mwv_cells), NULL, 0, | |
187 | regmap_irq_get_domain(bd->irq_data)); | |
188 | if (ret) { | |
189 | regmap_del_irq_chip(bd->irq, bd->irq_data); | |
190 | return ret; | |
191 | } | |
192 | ||
193 | return 0; | |
194 | } | |
195 | ||
196 | static int bd9571mwv_remove(struct i2c_client *client) | |
197 | { | |
198 | struct bd9571mwv *bd = i2c_get_clientdata(client); | |
199 | ||
200 | regmap_del_irq_chip(bd->irq, bd->irq_data); | |
201 | ||
202 | return 0; | |
203 | } | |
204 | ||
205 | static const struct of_device_id bd9571mwv_of_match_table[] = { | |
206 | { .compatible = "rohm,bd9571mwv", }, | |
207 | { /* sentinel */ } | |
208 | }; | |
209 | MODULE_DEVICE_TABLE(of, bd9571mwv_of_match_table); | |
210 | ||
211 | static const struct i2c_device_id bd9571mwv_id_table[] = { | |
212 | { "bd9571mwv", 0 }, | |
213 | { /* sentinel */ } | |
214 | }; | |
215 | MODULE_DEVICE_TABLE(i2c, bd9571mwv_id_table); | |
216 | ||
217 | static struct i2c_driver bd9571mwv_driver = { | |
218 | .driver = { | |
219 | .name = "bd9571mwv", | |
220 | .of_match_table = bd9571mwv_of_match_table, | |
221 | }, | |
222 | .probe = bd9571mwv_probe, | |
223 | .remove = bd9571mwv_remove, | |
224 | .id_table = bd9571mwv_id_table, | |
225 | }; | |
226 | module_i2c_driver(bd9571mwv_driver); | |
227 | ||
228 | MODULE_AUTHOR("Marek Vasut <marek.vasut+renesas@gmail.com>"); | |
229 | MODULE_DESCRIPTION("BD9571MWV PMIC Driver"); | |
230 | MODULE_LICENSE("GPL v2"); |