GNU Linux-libre 5.10.219-gnu1
[releases.git] / drivers / mfd / bd9571mwv.c
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_BKUP_MODE_CNT, BD9571MWV_BKUP_MODE_CNT),
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[] = {
48         regmap_reg_range(BD9571MWV_BKUP_MODE_CNT, BD9571MWV_BKUP_MODE_CNT),
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[] = {
62         regmap_reg_range(BD9571MWV_DVFS_MONIVDAC, BD9571MWV_DVFS_MONIVDAC),
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 = devm_mfd_add_devices(bd->dev, PLATFORM_DEVID_AUTO,
189                                    bd9571mwv_cells, ARRAY_SIZE(bd9571mwv_cells),
190                                    NULL, 0, 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");