Merge remote-tracking branch 'stable/linux-5.15.y' into rpi-5.15.y
[platform/kernel/linux-rpi.git] / drivers / mfd / bd9571mwv.c
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * ROHM BD9571MWV-M and BD9574MVF-M core driver
4  *
5  * Copyright (C) 2017 Marek Vasut <marek.vasut+renesas@gmail.com>
6  * Copyright (C) 2020 Renesas Electronics Corporation
7  *
8  * Based on the TPS65086 driver
9  */
10
11 #include <linux/i2c.h>
12 #include <linux/interrupt.h>
13 #include <linux/mfd/core.h>
14 #include <linux/mfd/rohm-generic.h>
15 #include <linux/module.h>
16
17 #include <linux/mfd/bd9571mwv.h>
18
19 static const struct mfd_cell bd9571mwv_cells[] = {
20         { .name = "bd9571mwv-regulator", },
21         { .name = "bd9571mwv-gpio", },
22 };
23
24 static const struct regmap_range bd9571mwv_readable_yes_ranges[] = {
25         regmap_reg_range(BD9571MWV_VENDOR_CODE, BD9571MWV_PRODUCT_REVISION),
26         regmap_reg_range(BD9571MWV_BKUP_MODE_CNT, BD9571MWV_BKUP_MODE_CNT),
27         regmap_reg_range(BD9571MWV_AVS_SET_MONI, BD9571MWV_AVS_DVFS_VID(3)),
28         regmap_reg_range(BD9571MWV_VD18_VID, BD9571MWV_VD33_VID),
29         regmap_reg_range(BD9571MWV_DVFS_VINIT, BD9571MWV_DVFS_VINIT),
30         regmap_reg_range(BD9571MWV_DVFS_SETVMAX, BD9571MWV_DVFS_MONIVDAC),
31         regmap_reg_range(BD9571MWV_GPIO_IN, BD9571MWV_GPIO_IN),
32         regmap_reg_range(BD9571MWV_GPIO_INT, BD9571MWV_GPIO_INTMASK),
33         regmap_reg_range(BD9571MWV_INT_INTREQ, BD9571MWV_INT_INTMASK),
34 };
35
36 static const struct regmap_access_table bd9571mwv_readable_table = {
37         .yes_ranges     = bd9571mwv_readable_yes_ranges,
38         .n_yes_ranges   = ARRAY_SIZE(bd9571mwv_readable_yes_ranges),
39 };
40
41 static const struct regmap_range bd9571mwv_writable_yes_ranges[] = {
42         regmap_reg_range(BD9571MWV_BKUP_MODE_CNT, BD9571MWV_BKUP_MODE_CNT),
43         regmap_reg_range(BD9571MWV_AVS_VD09_VID(0), BD9571MWV_AVS_VD09_VID(3)),
44         regmap_reg_range(BD9571MWV_DVFS_SETVID, BD9571MWV_DVFS_SETVID),
45         regmap_reg_range(BD9571MWV_GPIO_DIR, BD9571MWV_GPIO_OUT),
46         regmap_reg_range(BD9571MWV_GPIO_INT_SET, BD9571MWV_GPIO_INTMASK),
47         regmap_reg_range(BD9571MWV_INT_INTREQ, BD9571MWV_INT_INTMASK),
48 };
49
50 static const struct regmap_access_table bd9571mwv_writable_table = {
51         .yes_ranges     = bd9571mwv_writable_yes_ranges,
52         .n_yes_ranges   = ARRAY_SIZE(bd9571mwv_writable_yes_ranges),
53 };
54
55 static const struct regmap_range bd9571mwv_volatile_yes_ranges[] = {
56         regmap_reg_range(BD9571MWV_DVFS_MONIVDAC, BD9571MWV_DVFS_MONIVDAC),
57         regmap_reg_range(BD9571MWV_GPIO_IN, BD9571MWV_GPIO_IN),
58         regmap_reg_range(BD9571MWV_GPIO_INT, BD9571MWV_GPIO_INT),
59         regmap_reg_range(BD9571MWV_INT_INTREQ, BD9571MWV_INT_INTREQ),
60 };
61
62 static const struct regmap_access_table bd9571mwv_volatile_table = {
63         .yes_ranges     = bd9571mwv_volatile_yes_ranges,
64         .n_yes_ranges   = ARRAY_SIZE(bd9571mwv_volatile_yes_ranges),
65 };
66
67 static const struct regmap_config bd9571mwv_regmap_config = {
68         .reg_bits       = 8,
69         .val_bits       = 8,
70         .cache_type     = REGCACHE_RBTREE,
71         .rd_table       = &bd9571mwv_readable_table,
72         .wr_table       = &bd9571mwv_writable_table,
73         .volatile_table = &bd9571mwv_volatile_table,
74         .max_register   = 0xff,
75 };
76
77 static const struct regmap_irq bd9571mwv_irqs[] = {
78         REGMAP_IRQ_REG(BD9571MWV_IRQ_MD1, 0,
79                        BD9571MWV_INT_INTREQ_MD1_INT),
80         REGMAP_IRQ_REG(BD9571MWV_IRQ_MD2_E1, 0,
81                        BD9571MWV_INT_INTREQ_MD2_E1_INT),
82         REGMAP_IRQ_REG(BD9571MWV_IRQ_MD2_E2, 0,
83                        BD9571MWV_INT_INTREQ_MD2_E2_INT),
84         REGMAP_IRQ_REG(BD9571MWV_IRQ_PROT_ERR, 0,
85                        BD9571MWV_INT_INTREQ_PROT_ERR_INT),
86         REGMAP_IRQ_REG(BD9571MWV_IRQ_GP, 0,
87                        BD9571MWV_INT_INTREQ_GP_INT),
88         REGMAP_IRQ_REG(BD9571MWV_IRQ_128H_OF, 0,
89                        BD9571MWV_INT_INTREQ_128H_OF_INT),
90         REGMAP_IRQ_REG(BD9571MWV_IRQ_WDT_OF, 0,
91                        BD9571MWV_INT_INTREQ_WDT_OF_INT),
92         REGMAP_IRQ_REG(BD9571MWV_IRQ_BKUP_TRG, 0,
93                        BD9571MWV_INT_INTREQ_BKUP_TRG_INT),
94 };
95
96 static struct regmap_irq_chip bd9571mwv_irq_chip = {
97         .name           = "bd9571mwv",
98         .status_base    = BD9571MWV_INT_INTREQ,
99         .mask_base      = BD9571MWV_INT_INTMASK,
100         .ack_base       = BD9571MWV_INT_INTREQ,
101         .init_ack_masked = true,
102         .num_regs       = 1,
103         .irqs           = bd9571mwv_irqs,
104         .num_irqs       = ARRAY_SIZE(bd9571mwv_irqs),
105 };
106
107 static const struct mfd_cell bd9574mwf_cells[] = {
108         { .name = "bd9574mwf-regulator", },
109         { .name = "bd9574mwf-gpio", },
110 };
111
112 static const struct regmap_range bd9574mwf_readable_yes_ranges[] = {
113         regmap_reg_range(BD9571MWV_VENDOR_CODE, BD9571MWV_PRODUCT_REVISION),
114         regmap_reg_range(BD9571MWV_BKUP_MODE_CNT, BD9571MWV_BKUP_MODE_CNT),
115         regmap_reg_range(BD9571MWV_DVFS_VINIT, BD9571MWV_DVFS_SETVMAX),
116         regmap_reg_range(BD9571MWV_DVFS_SETVID, BD9571MWV_DVFS_MONIVDAC),
117         regmap_reg_range(BD9571MWV_GPIO_IN, BD9571MWV_GPIO_IN),
118         regmap_reg_range(BD9571MWV_GPIO_INT, BD9571MWV_GPIO_INTMASK),
119         regmap_reg_range(BD9571MWV_INT_INTREQ, BD9571MWV_INT_INTMASK),
120 };
121
122 static const struct regmap_access_table bd9574mwf_readable_table = {
123         .yes_ranges     = bd9574mwf_readable_yes_ranges,
124         .n_yes_ranges   = ARRAY_SIZE(bd9574mwf_readable_yes_ranges),
125 };
126
127 static const struct regmap_range bd9574mwf_writable_yes_ranges[] = {
128         regmap_reg_range(BD9571MWV_BKUP_MODE_CNT, BD9571MWV_BKUP_MODE_CNT),
129         regmap_reg_range(BD9571MWV_DVFS_SETVID, BD9571MWV_DVFS_SETVID),
130         regmap_reg_range(BD9571MWV_GPIO_DIR, BD9571MWV_GPIO_OUT),
131         regmap_reg_range(BD9571MWV_GPIO_INT_SET, BD9571MWV_GPIO_INTMASK),
132         regmap_reg_range(BD9571MWV_INT_INTREQ, BD9571MWV_INT_INTMASK),
133 };
134
135 static const struct regmap_access_table bd9574mwf_writable_table = {
136         .yes_ranges     = bd9574mwf_writable_yes_ranges,
137         .n_yes_ranges   = ARRAY_SIZE(bd9574mwf_writable_yes_ranges),
138 };
139
140 static const struct regmap_range bd9574mwf_volatile_yes_ranges[] = {
141         regmap_reg_range(BD9571MWV_DVFS_MONIVDAC, BD9571MWV_DVFS_MONIVDAC),
142         regmap_reg_range(BD9571MWV_GPIO_IN, BD9571MWV_GPIO_IN),
143         regmap_reg_range(BD9571MWV_GPIO_INT, BD9571MWV_GPIO_INT),
144         regmap_reg_range(BD9571MWV_INT_INTREQ, BD9571MWV_INT_INTREQ),
145 };
146
147 static const struct regmap_access_table bd9574mwf_volatile_table = {
148         .yes_ranges     = bd9574mwf_volatile_yes_ranges,
149         .n_yes_ranges   = ARRAY_SIZE(bd9574mwf_volatile_yes_ranges),
150 };
151
152 static const struct regmap_config bd9574mwf_regmap_config = {
153         .reg_bits       = 8,
154         .val_bits       = 8,
155         .cache_type     = REGCACHE_RBTREE,
156         .rd_table       = &bd9574mwf_readable_table,
157         .wr_table       = &bd9574mwf_writable_table,
158         .volatile_table = &bd9574mwf_volatile_table,
159         .max_register   = 0xff,
160 };
161
162 static struct regmap_irq_chip bd9574mwf_irq_chip = {
163         .name           = "bd9574mwf",
164         .status_base    = BD9571MWV_INT_INTREQ,
165         .mask_base      = BD9571MWV_INT_INTMASK,
166         .ack_base       = BD9571MWV_INT_INTREQ,
167         .init_ack_masked = true,
168         .num_regs       = 1,
169         .irqs           = bd9571mwv_irqs,
170         .num_irqs       = ARRAY_SIZE(bd9571mwv_irqs),
171 };
172
173 static int bd957x_identify(struct device *dev, struct regmap *regmap)
174 {
175         unsigned int value;
176         int ret;
177
178         ret = regmap_read(regmap, BD9571MWV_VENDOR_CODE, &value);
179         if (ret) {
180                 dev_err(dev, "Failed to read vendor code register (ret=%i)\n",
181                         ret);
182                 return ret;
183         }
184
185         if (value != BD9571MWV_VENDOR_CODE_VAL) {
186                 dev_err(dev, "Invalid vendor code ID %02x (expected %02x)\n",
187                         value, BD9571MWV_VENDOR_CODE_VAL);
188                 return -EINVAL;
189         }
190
191         ret = regmap_read(regmap, BD9571MWV_PRODUCT_CODE, &value);
192         if (ret) {
193                 dev_err(dev, "Failed to read product code register (ret=%i)\n",
194                         ret);
195                 return ret;
196         }
197         ret = regmap_read(regmap, BD9571MWV_PRODUCT_REVISION, &value);
198         if (ret) {
199                 dev_err(dev, "Failed to read revision register (ret=%i)\n",
200                         ret);
201                 return ret;
202         }
203
204         return 0;
205 }
206
207 static int bd9571mwv_probe(struct i2c_client *client,
208                            const struct i2c_device_id *ids)
209 {
210         const struct regmap_config *regmap_config;
211         const struct regmap_irq_chip *irq_chip;
212         const struct mfd_cell *cells;
213         struct device *dev = &client->dev;
214         struct regmap *regmap;
215         struct regmap_irq_chip_data *irq_data;
216         int ret, num_cells, irq = client->irq;
217
218         /* Read the PMIC product code */
219         ret = i2c_smbus_read_byte_data(client, BD9571MWV_PRODUCT_CODE);
220         if (ret < 0) {
221                 dev_err(dev, "Failed to read product code\n");
222                 return ret;
223         }
224
225         switch (ret) {
226         case BD9571MWV_PRODUCT_CODE_BD9571MWV:
227                 regmap_config = &bd9571mwv_regmap_config;
228                 irq_chip = &bd9571mwv_irq_chip;
229                 cells = bd9571mwv_cells;
230                 num_cells = ARRAY_SIZE(bd9571mwv_cells);
231                 break;
232         case BD9571MWV_PRODUCT_CODE_BD9574MWF:
233                 regmap_config = &bd9574mwf_regmap_config;
234                 irq_chip = &bd9574mwf_irq_chip;
235                 cells = bd9574mwf_cells;
236                 num_cells = ARRAY_SIZE(bd9574mwf_cells);
237                 break;
238         default:
239                 dev_err(dev, "Unsupported device 0x%x\n", ret);
240                 return -ENODEV;
241         }
242
243         regmap = devm_regmap_init_i2c(client, regmap_config);
244         if (IS_ERR(regmap)) {
245                 dev_err(dev, "Failed to initialize register map\n");
246                 return PTR_ERR(regmap);
247         }
248
249         ret = bd957x_identify(dev, regmap);
250         if (ret)
251                 return ret;
252
253         ret = devm_regmap_add_irq_chip(dev, regmap, irq, IRQF_ONESHOT, 0,
254                                        irq_chip, &irq_data);
255         if (ret) {
256                 dev_err(dev, "Failed to register IRQ chip\n");
257                 return ret;
258         }
259
260         return devm_mfd_add_devices(dev, PLATFORM_DEVID_AUTO, cells, num_cells,
261                                     NULL, 0, regmap_irq_get_domain(irq_data));
262 }
263
264 static const struct of_device_id bd9571mwv_of_match_table[] = {
265         { .compatible = "rohm,bd9571mwv", },
266         { .compatible = "rohm,bd9574mwf", },
267         { /* sentinel */ }
268 };
269 MODULE_DEVICE_TABLE(of, bd9571mwv_of_match_table);
270
271 static const struct i2c_device_id bd9571mwv_id_table[] = {
272         { "bd9571mwv", 0 },
273         { /* sentinel */ }
274 };
275 MODULE_DEVICE_TABLE(i2c, bd9571mwv_id_table);
276
277 static struct i2c_driver bd9571mwv_driver = {
278         .driver         = {
279                 .name   = "bd9571mwv",
280                 .of_match_table = bd9571mwv_of_match_table,
281         },
282         .probe          = bd9571mwv_probe,
283         .id_table       = bd9571mwv_id_table,
284 };
285 module_i2c_driver(bd9571mwv_driver);
286
287 MODULE_AUTHOR("Marek Vasut <marek.vasut+renesas@gmail.com>");
288 MODULE_DESCRIPTION("BD9571MWV PMIC Driver");
289 MODULE_LICENSE("GPL v2");