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1// SPDX-License-Identifier: GPL-2.0+
2/* I2C support for Dialog DA9063
3 *
4 * Copyright 2012 Dialog Semiconductor Ltd.
5 * Copyright 2013 Philipp Zabel, Pengutronix
6 *
7 * Author: Krystian Garbaciak, Dialog Semiconductor
8 */
9
10#include <linux/kernel.h>
11#include <linux/module.h>
12#include <linux/i2c.h>
13#include <linux/regmap.h>
14#include <linux/delay.h>
15#include <linux/slab.h>
16#include <linux/err.h>
17
18#include <linux/mfd/core.h>
19#include <linux/mfd/da9063/core.h>
20#include <linux/mfd/da9063/registers.h>
21
22#include <linux/of.h>
23#include <linux/regulator/of_regulator.h>
24
25/*
26 * Raw I2C access required for just accessing chip and variant info before we
27 * know which device is present. The info read from the device using this
28 * approach is then used to select the correct regmap tables.
29 */
30
31#define DA9063_REG_PAGE_SIZE 0x100
32#define DA9063_REG_PAGED_ADDR_MASK 0xFF
33
34enum da9063_page_sel_buf_fmt {
35 DA9063_PAGE_SEL_BUF_PAGE_REG = 0,
36 DA9063_PAGE_SEL_BUF_PAGE_VAL,
37 DA9063_PAGE_SEL_BUF_SIZE,
38};
39
40enum da9063_paged_read_msgs {
41 DA9063_PAGED_READ_MSG_PAGE_SEL = 0,
42 DA9063_PAGED_READ_MSG_REG_SEL,
43 DA9063_PAGED_READ_MSG_DATA,
44 DA9063_PAGED_READ_MSG_CNT,
45};
46
47static int da9063_i2c_blockreg_read(struct i2c_client *client, u16 addr,
48 u8 *buf, int count)
49{
50 struct i2c_msg xfer[DA9063_PAGED_READ_MSG_CNT];
51 u8 page_sel_buf[DA9063_PAGE_SEL_BUF_SIZE];
52 u8 page_num, paged_addr;
53 int ret;
54
55 /* Determine page info based on register address */
56 page_num = (addr / DA9063_REG_PAGE_SIZE);
57 if (page_num > 1) {
58 dev_err(&client->dev, "Invalid register address provided\n");
59 return -EINVAL;
60 }
61
62 paged_addr = (addr % DA9063_REG_PAGE_SIZE) & DA9063_REG_PAGED_ADDR_MASK;
63 page_sel_buf[DA9063_PAGE_SEL_BUF_PAGE_REG] = DA9063_REG_PAGE_CON;
64 page_sel_buf[DA9063_PAGE_SEL_BUF_PAGE_VAL] =
65 (page_num << DA9063_I2C_PAGE_SEL_SHIFT) & DA9063_REG_PAGE_MASK;
66
67 /* Write reg address, page selection */
68 xfer[DA9063_PAGED_READ_MSG_PAGE_SEL].addr = client->addr;
69 xfer[DA9063_PAGED_READ_MSG_PAGE_SEL].flags = 0;
70 xfer[DA9063_PAGED_READ_MSG_PAGE_SEL].len = DA9063_PAGE_SEL_BUF_SIZE;
71 xfer[DA9063_PAGED_READ_MSG_PAGE_SEL].buf = page_sel_buf;
72
73 /* Select register address */
74 xfer[DA9063_PAGED_READ_MSG_REG_SEL].addr = client->addr;
75 xfer[DA9063_PAGED_READ_MSG_REG_SEL].flags = 0;
76 xfer[DA9063_PAGED_READ_MSG_REG_SEL].len = sizeof(paged_addr);
77 xfer[DA9063_PAGED_READ_MSG_REG_SEL].buf = &paged_addr;
78
79 /* Read data */
80 xfer[DA9063_PAGED_READ_MSG_DATA].addr = client->addr;
81 xfer[DA9063_PAGED_READ_MSG_DATA].flags = I2C_M_RD;
82 xfer[DA9063_PAGED_READ_MSG_DATA].len = count;
83 xfer[DA9063_PAGED_READ_MSG_DATA].buf = buf;
84
85 ret = i2c_transfer(client->adapter, xfer, DA9063_PAGED_READ_MSG_CNT);
86 if (ret < 0) {
87 dev_err(&client->dev, "Paged block read failed: %d\n", ret);
88 return ret;
89 }
90
91 if (ret != DA9063_PAGED_READ_MSG_CNT) {
92 dev_err(&client->dev, "Paged block read failed to complete\n");
93 return -EIO;
94 }
95
96 return 0;
97}
98
99enum {
100 DA9063_DEV_ID_REG = 0,
101 DA9063_VAR_ID_REG,
102 DA9063_CHIP_ID_REGS,
103};
104
105static int da9063_get_device_type(struct i2c_client *i2c, struct da9063 *da9063)
106{
107 u8 buf[DA9063_CHIP_ID_REGS];
108 int ret;
109
110 ret = da9063_i2c_blockreg_read(i2c, DA9063_REG_DEVICE_ID, buf,
111 DA9063_CHIP_ID_REGS);
112 if (ret)
113 return ret;
114
115 if (buf[DA9063_DEV_ID_REG] != PMIC_CHIP_ID_DA9063) {
116 dev_err(da9063->dev,
117 "Invalid chip device ID: 0x%02x\n",
118 buf[DA9063_DEV_ID_REG]);
119 return -ENODEV;
120 }
121
122 dev_info(da9063->dev,
123 "Device detected (chip-ID: 0x%02X, var-ID: 0x%02X)\n",
124 buf[DA9063_DEV_ID_REG], buf[DA9063_VAR_ID_REG]);
125
126 da9063->variant_code =
127 (buf[DA9063_VAR_ID_REG] & DA9063_VARIANT_ID_MRC_MASK)
128 >> DA9063_VARIANT_ID_MRC_SHIFT;
129
130 return 0;
131}
132
133/*
134 * Variant specific regmap configs
135 */
136
137static const struct regmap_range da9063_ad_readable_ranges[] = {
138 regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_AD_REG_SECOND_D),
139 regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_ID_32_31),
140 regmap_reg_range(DA9063_REG_SEQ_A, DA9063_REG_AUTO3_LOW),
141 regmap_reg_range(DA9063_REG_T_OFFSET, DA9063_AD_REG_GP_ID_19),
142 regmap_reg_range(DA9063_REG_DEVICE_ID, DA9063_REG_VARIANT_ID),
143};
144
145static const struct regmap_range da9063_ad_writeable_ranges[] = {
146 regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_REG_PAGE_CON),
147 regmap_reg_range(DA9063_REG_FAULT_LOG, DA9063_REG_VSYS_MON),
148 regmap_reg_range(DA9063_REG_COUNT_S, DA9063_AD_REG_ALARM_Y),
149 regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_ID_32_31),
150 regmap_reg_range(DA9063_REG_SEQ_A, DA9063_REG_AUTO3_LOW),
151 regmap_reg_range(DA9063_REG_CONFIG_I, DA9063_AD_REG_MON_REG_4),
152 regmap_reg_range(DA9063_AD_REG_GP_ID_0, DA9063_AD_REG_GP_ID_19),
153};
154
155static const struct regmap_range da9063_ad_volatile_ranges[] = {
156 regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_REG_EVENT_D),
157 regmap_reg_range(DA9063_REG_CONTROL_A, DA9063_REG_CONTROL_B),
158 regmap_reg_range(DA9063_REG_CONTROL_E, DA9063_REG_CONTROL_F),
159 regmap_reg_range(DA9063_REG_BCORE2_CONT, DA9063_REG_LDO11_CONT),
160 regmap_reg_range(DA9063_REG_DVC_1, DA9063_REG_ADC_MAN),
161 regmap_reg_range(DA9063_REG_ADC_RES_L, DA9063_AD_REG_SECOND_D),
162 regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_SEQ),
163 regmap_reg_range(DA9063_REG_EN_32K, DA9063_REG_EN_32K),
164 regmap_reg_range(DA9063_AD_REG_MON_REG_5, DA9063_AD_REG_MON_REG_6),
165};
166
167static const struct regmap_access_table da9063_ad_readable_table = {
168 .yes_ranges = da9063_ad_readable_ranges,
169 .n_yes_ranges = ARRAY_SIZE(da9063_ad_readable_ranges),
170};
171
172static const struct regmap_access_table da9063_ad_writeable_table = {
173 .yes_ranges = da9063_ad_writeable_ranges,
174 .n_yes_ranges = ARRAY_SIZE(da9063_ad_writeable_ranges),
175};
176
177static const struct regmap_access_table da9063_ad_volatile_table = {
178 .yes_ranges = da9063_ad_volatile_ranges,
179 .n_yes_ranges = ARRAY_SIZE(da9063_ad_volatile_ranges),
180};
181
182static const struct regmap_range da9063_bb_readable_ranges[] = {
183 regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_BB_REG_SECOND_D),
184 regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_ID_32_31),
185 regmap_reg_range(DA9063_REG_SEQ_A, DA9063_REG_AUTO3_LOW),
186 regmap_reg_range(DA9063_REG_T_OFFSET, DA9063_BB_REG_GP_ID_19),
187 regmap_reg_range(DA9063_REG_DEVICE_ID, DA9063_REG_VARIANT_ID),
188};
189
190static const struct regmap_range da9063_bb_writeable_ranges[] = {
191 regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_REG_PAGE_CON),
192 regmap_reg_range(DA9063_REG_FAULT_LOG, DA9063_REG_VSYS_MON),
193 regmap_reg_range(DA9063_REG_COUNT_S, DA9063_BB_REG_ALARM_Y),
194 regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_ID_32_31),
195 regmap_reg_range(DA9063_REG_SEQ_A, DA9063_REG_AUTO3_LOW),
196 regmap_reg_range(DA9063_REG_CONFIG_I, DA9063_BB_REG_MON_REG_4),
197 regmap_reg_range(DA9063_BB_REG_GP_ID_0, DA9063_BB_REG_GP_ID_19),
198};
199
200static const struct regmap_range da9063_bb_da_volatile_ranges[] = {
201 regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_REG_EVENT_D),
202 regmap_reg_range(DA9063_REG_CONTROL_A, DA9063_REG_CONTROL_B),
203 regmap_reg_range(DA9063_REG_CONTROL_E, DA9063_REG_CONTROL_F),
204 regmap_reg_range(DA9063_REG_BCORE2_CONT, DA9063_REG_LDO11_CONT),
205 regmap_reg_range(DA9063_REG_DVC_1, DA9063_REG_ADC_MAN),
206 regmap_reg_range(DA9063_REG_ADC_RES_L, DA9063_BB_REG_SECOND_D),
207 regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_SEQ),
208 regmap_reg_range(DA9063_REG_EN_32K, DA9063_REG_EN_32K),
209 regmap_reg_range(DA9063_BB_REG_MON_REG_5, DA9063_BB_REG_MON_REG_6),
210};
211
212static const struct regmap_access_table da9063_bb_readable_table = {
213 .yes_ranges = da9063_bb_readable_ranges,
214 .n_yes_ranges = ARRAY_SIZE(da9063_bb_readable_ranges),
215};
216
217static const struct regmap_access_table da9063_bb_writeable_table = {
218 .yes_ranges = da9063_bb_writeable_ranges,
219 .n_yes_ranges = ARRAY_SIZE(da9063_bb_writeable_ranges),
220};
221
222static const struct regmap_access_table da9063_bb_da_volatile_table = {
223 .yes_ranges = da9063_bb_da_volatile_ranges,
224 .n_yes_ranges = ARRAY_SIZE(da9063_bb_da_volatile_ranges),
225};
226
227static const struct regmap_range da9063l_bb_readable_ranges[] = {
228 regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_REG_MON_A10_RES),
229 regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_ID_32_31),
230 regmap_reg_range(DA9063_REG_SEQ_A, DA9063_REG_AUTO3_LOW),
231 regmap_reg_range(DA9063_REG_T_OFFSET, DA9063_BB_REG_GP_ID_19),
232 regmap_reg_range(DA9063_REG_DEVICE_ID, DA9063_REG_VARIANT_ID),
233};
234
235static const struct regmap_range da9063l_bb_writeable_ranges[] = {
236 regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_REG_PAGE_CON),
237 regmap_reg_range(DA9063_REG_FAULT_LOG, DA9063_REG_VSYS_MON),
238 regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_ID_32_31),
239 regmap_reg_range(DA9063_REG_SEQ_A, DA9063_REG_AUTO3_LOW),
240 regmap_reg_range(DA9063_REG_CONFIG_I, DA9063_BB_REG_MON_REG_4),
241 regmap_reg_range(DA9063_BB_REG_GP_ID_0, DA9063_BB_REG_GP_ID_19),
242};
243
244static const struct regmap_range da9063l_bb_da_volatile_ranges[] = {
245 regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_REG_EVENT_D),
246 regmap_reg_range(DA9063_REG_CONTROL_A, DA9063_REG_CONTROL_B),
247 regmap_reg_range(DA9063_REG_CONTROL_E, DA9063_REG_CONTROL_F),
248 regmap_reg_range(DA9063_REG_BCORE2_CONT, DA9063_REG_LDO11_CONT),
249 regmap_reg_range(DA9063_REG_DVC_1, DA9063_REG_ADC_MAN),
250 regmap_reg_range(DA9063_REG_ADC_RES_L, DA9063_REG_MON_A10_RES),
251 regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_SEQ),
252 regmap_reg_range(DA9063_REG_EN_32K, DA9063_REG_EN_32K),
253 regmap_reg_range(DA9063_BB_REG_MON_REG_5, DA9063_BB_REG_MON_REG_6),
254};
255
256static const struct regmap_access_table da9063l_bb_readable_table = {
257 .yes_ranges = da9063l_bb_readable_ranges,
258 .n_yes_ranges = ARRAY_SIZE(da9063l_bb_readable_ranges),
259};
260
261static const struct regmap_access_table da9063l_bb_writeable_table = {
262 .yes_ranges = da9063l_bb_writeable_ranges,
263 .n_yes_ranges = ARRAY_SIZE(da9063l_bb_writeable_ranges),
264};
265
266static const struct regmap_access_table da9063l_bb_da_volatile_table = {
267 .yes_ranges = da9063l_bb_da_volatile_ranges,
268 .n_yes_ranges = ARRAY_SIZE(da9063l_bb_da_volatile_ranges),
269};
270
271static const struct regmap_range da9063_da_readable_ranges[] = {
272 regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_BB_REG_SECOND_D),
273 regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_ID_32_31),
274 regmap_reg_range(DA9063_REG_SEQ_A, DA9063_REG_AUTO3_LOW),
275 regmap_reg_range(DA9063_REG_T_OFFSET, DA9063_BB_REG_GP_ID_11),
276 regmap_reg_range(DA9063_REG_DEVICE_ID, DA9063_REG_VARIANT_ID),
277};
278
279static const struct regmap_range da9063_da_writeable_ranges[] = {
280 regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_REG_PAGE_CON),
281 regmap_reg_range(DA9063_REG_FAULT_LOG, DA9063_REG_VSYS_MON),
282 regmap_reg_range(DA9063_REG_COUNT_S, DA9063_BB_REG_ALARM_Y),
283 regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_ID_32_31),
284 regmap_reg_range(DA9063_REG_SEQ_A, DA9063_REG_AUTO3_LOW),
285 regmap_reg_range(DA9063_REG_CONFIG_I, DA9063_BB_REG_MON_REG_4),
286 regmap_reg_range(DA9063_BB_REG_GP_ID_0, DA9063_BB_REG_GP_ID_11),
287};
288
289static const struct regmap_access_table da9063_da_readable_table = {
290 .yes_ranges = da9063_da_readable_ranges,
291 .n_yes_ranges = ARRAY_SIZE(da9063_da_readable_ranges),
292};
293
294static const struct regmap_access_table da9063_da_writeable_table = {
295 .yes_ranges = da9063_da_writeable_ranges,
296 .n_yes_ranges = ARRAY_SIZE(da9063_da_writeable_ranges),
297};
298
299static const struct regmap_range da9063l_da_readable_ranges[] = {
300 regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_REG_MON_A10_RES),
301 regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_ID_32_31),
302 regmap_reg_range(DA9063_REG_SEQ_A, DA9063_REG_AUTO3_LOW),
303 regmap_reg_range(DA9063_REG_T_OFFSET, DA9063_BB_REG_GP_ID_11),
304 regmap_reg_range(DA9063_REG_DEVICE_ID, DA9063_REG_VARIANT_ID),
305};
306
307static const struct regmap_range da9063l_da_writeable_ranges[] = {
308 regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_REG_PAGE_CON),
309 regmap_reg_range(DA9063_REG_FAULT_LOG, DA9063_REG_VSYS_MON),
310 regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_ID_32_31),
311 regmap_reg_range(DA9063_REG_SEQ_A, DA9063_REG_AUTO3_LOW),
312 regmap_reg_range(DA9063_REG_CONFIG_I, DA9063_BB_REG_MON_REG_4),
313 regmap_reg_range(DA9063_BB_REG_GP_ID_0, DA9063_BB_REG_GP_ID_11),
314};
315
316static const struct regmap_access_table da9063l_da_readable_table = {
317 .yes_ranges = da9063l_da_readable_ranges,
318 .n_yes_ranges = ARRAY_SIZE(da9063l_da_readable_ranges),
319};
320
321static const struct regmap_access_table da9063l_da_writeable_table = {
322 .yes_ranges = da9063l_da_writeable_ranges,
323 .n_yes_ranges = ARRAY_SIZE(da9063l_da_writeable_ranges),
324};
325
326static const struct regmap_range_cfg da9063_range_cfg[] = {
327 {
328 .range_min = DA9063_REG_PAGE_CON,
329 .range_max = DA9063_REG_CONFIG_ID,
330 .selector_reg = DA9063_REG_PAGE_CON,
331 .selector_mask = 1 << DA9063_I2C_PAGE_SEL_SHIFT,
332 .selector_shift = DA9063_I2C_PAGE_SEL_SHIFT,
333 .window_start = 0,
334 .window_len = 256,
335 }
336};
337
338static struct regmap_config da9063_regmap_config = {
339 .reg_bits = 8,
340 .val_bits = 8,
341 .ranges = da9063_range_cfg,
342 .num_ranges = ARRAY_SIZE(da9063_range_cfg),
343 .max_register = DA9063_REG_CONFIG_ID,
344
345 .cache_type = REGCACHE_RBTREE,
346};
347
348static const struct of_device_id da9063_dt_ids[] = {
349 { .compatible = "dlg,da9063", },
350 { .compatible = "dlg,da9063l", },
351 { }
352};
353MODULE_DEVICE_TABLE(of, da9063_dt_ids);
354static int da9063_i2c_probe(struct i2c_client *i2c)
355{
356 const struct i2c_device_id *id = i2c_client_get_device_id(i2c);
357 struct da9063 *da9063;
358 int ret;
359
360 da9063 = devm_kzalloc(&i2c->dev, sizeof(struct da9063), GFP_KERNEL);
361 if (da9063 == NULL)
362 return -ENOMEM;
363
364 i2c_set_clientdata(i2c, da9063);
365 da9063->dev = &i2c->dev;
366 da9063->chip_irq = i2c->irq;
367 da9063->type = id->driver_data;
368
369 ret = da9063_get_device_type(i2c, da9063);
370 if (ret)
371 return ret;
372
373 switch (da9063->type) {
374 case PMIC_TYPE_DA9063:
375 switch (da9063->variant_code) {
376 case PMIC_DA9063_AD:
377 da9063_regmap_config.rd_table =
378 &da9063_ad_readable_table;
379 da9063_regmap_config.wr_table =
380 &da9063_ad_writeable_table;
381 da9063_regmap_config.volatile_table =
382 &da9063_ad_volatile_table;
383 break;
384 case PMIC_DA9063_BB:
385 case PMIC_DA9063_CA:
386 da9063_regmap_config.rd_table =
387 &da9063_bb_readable_table;
388 da9063_regmap_config.wr_table =
389 &da9063_bb_writeable_table;
390 da9063_regmap_config.volatile_table =
391 &da9063_bb_da_volatile_table;
392 break;
393 case PMIC_DA9063_DA:
394 case PMIC_DA9063_EA:
395 da9063_regmap_config.rd_table =
396 &da9063_da_readable_table;
397 da9063_regmap_config.wr_table =
398 &da9063_da_writeable_table;
399 da9063_regmap_config.volatile_table =
400 &da9063_bb_da_volatile_table;
401 break;
402 default:
403 dev_err(da9063->dev,
404 "Chip variant not supported for DA9063\n");
405 return -ENODEV;
406 }
407 break;
408 case PMIC_TYPE_DA9063L:
409 switch (da9063->variant_code) {
410 case PMIC_DA9063_BB:
411 case PMIC_DA9063_CA:
412 da9063_regmap_config.rd_table =
413 &da9063l_bb_readable_table;
414 da9063_regmap_config.wr_table =
415 &da9063l_bb_writeable_table;
416 da9063_regmap_config.volatile_table =
417 &da9063l_bb_da_volatile_table;
418 break;
419 case PMIC_DA9063_DA:
420 case PMIC_DA9063_EA:
421 da9063_regmap_config.rd_table =
422 &da9063l_da_readable_table;
423 da9063_regmap_config.wr_table =
424 &da9063l_da_writeable_table;
425 da9063_regmap_config.volatile_table =
426 &da9063l_bb_da_volatile_table;
427 break;
428 default:
429 dev_err(da9063->dev,
430 "Chip variant not supported for DA9063L\n");
431 return -ENODEV;
432 }
433 break;
434 default:
435 dev_err(da9063->dev, "Chip type not supported\n");
436 return -ENODEV;
437 }
438
439 da9063->regmap = devm_regmap_init_i2c(i2c, &da9063_regmap_config);
440 if (IS_ERR(da9063->regmap)) {
441 ret = PTR_ERR(da9063->regmap);
442 dev_err(da9063->dev, "Failed to allocate register map: %d\n",
443 ret);
444 return ret;
445 }
446
447 /* If SMBus is not available and only I2C is possible, enter I2C mode */
448 if (i2c_check_functionality(i2c->adapter, I2C_FUNC_I2C)) {
449 ret = regmap_clear_bits(da9063->regmap, DA9063_REG_CONFIG_J,
450 DA9063_TWOWIRE_TO);
451 if (ret < 0) {
452 dev_err(da9063->dev, "Failed to set Two-Wire Bus Mode.\n");
453 return ret;
454 }
455 }
456
457 return da9063_device_init(da9063, i2c->irq);
458}
459
460static const struct i2c_device_id da9063_i2c_id[] = {
461 { "da9063", PMIC_TYPE_DA9063 },
462 { "da9063l", PMIC_TYPE_DA9063L },
463 {},
464};
465MODULE_DEVICE_TABLE(i2c, da9063_i2c_id);
466
467static struct i2c_driver da9063_i2c_driver = {
468 .driver = {
469 .name = "da9063",
470 .of_match_table = da9063_dt_ids,
471 },
472 .probe = da9063_i2c_probe,
473 .id_table = da9063_i2c_id,
474};
475
476module_i2c_driver(da9063_i2c_driver);
1// SPDX-License-Identifier: GPL-2.0+
2/* I2C support for Dialog DA9063
3 *
4 * Copyright 2012 Dialog Semiconductor Ltd.
5 * Copyright 2013 Philipp Zabel, Pengutronix
6 *
7 * Author: Krystian Garbaciak, Dialog Semiconductor
8 */
9
10#include <linux/kernel.h>
11#include <linux/module.h>
12#include <linux/i2c.h>
13#include <linux/regmap.h>
14#include <linux/delay.h>
15#include <linux/slab.h>
16#include <linux/err.h>
17
18#include <linux/mfd/core.h>
19#include <linux/mfd/da9063/core.h>
20#include <linux/mfd/da9063/registers.h>
21
22#include <linux/of.h>
23#include <linux/regulator/of_regulator.h>
24
25/*
26 * Raw I2C access required for just accessing chip and variant info before we
27 * know which device is present. The info read from the device using this
28 * approach is then used to select the correct regmap tables.
29 */
30
31#define DA9063_REG_PAGE_SIZE 0x100
32#define DA9063_REG_PAGED_ADDR_MASK 0xFF
33
34enum da9063_page_sel_buf_fmt {
35 DA9063_PAGE_SEL_BUF_PAGE_REG = 0,
36 DA9063_PAGE_SEL_BUF_PAGE_VAL,
37 DA9063_PAGE_SEL_BUF_SIZE,
38};
39
40enum da9063_paged_read_msgs {
41 DA9063_PAGED_READ_MSG_PAGE_SEL = 0,
42 DA9063_PAGED_READ_MSG_REG_SEL,
43 DA9063_PAGED_READ_MSG_DATA,
44 DA9063_PAGED_READ_MSG_CNT,
45};
46
47static int da9063_i2c_blockreg_read(struct i2c_client *client, u16 addr,
48 u8 *buf, int count)
49{
50 struct i2c_msg xfer[DA9063_PAGED_READ_MSG_CNT];
51 u8 page_sel_buf[DA9063_PAGE_SEL_BUF_SIZE];
52 u8 page_num, paged_addr;
53 int ret;
54
55 /* Determine page info based on register address */
56 page_num = (addr / DA9063_REG_PAGE_SIZE);
57 if (page_num > 1) {
58 dev_err(&client->dev, "Invalid register address provided\n");
59 return -EINVAL;
60 }
61
62 paged_addr = (addr % DA9063_REG_PAGE_SIZE) & DA9063_REG_PAGED_ADDR_MASK;
63 page_sel_buf[DA9063_PAGE_SEL_BUF_PAGE_REG] = DA9063_REG_PAGE_CON;
64 page_sel_buf[DA9063_PAGE_SEL_BUF_PAGE_VAL] =
65 (page_num << DA9063_I2C_PAGE_SEL_SHIFT) & DA9063_REG_PAGE_MASK;
66
67 /* Write reg address, page selection */
68 xfer[DA9063_PAGED_READ_MSG_PAGE_SEL].addr = client->addr;
69 xfer[DA9063_PAGED_READ_MSG_PAGE_SEL].flags = 0;
70 xfer[DA9063_PAGED_READ_MSG_PAGE_SEL].len = DA9063_PAGE_SEL_BUF_SIZE;
71 xfer[DA9063_PAGED_READ_MSG_PAGE_SEL].buf = page_sel_buf;
72
73 /* Select register address */
74 xfer[DA9063_PAGED_READ_MSG_REG_SEL].addr = client->addr;
75 xfer[DA9063_PAGED_READ_MSG_REG_SEL].flags = 0;
76 xfer[DA9063_PAGED_READ_MSG_REG_SEL].len = sizeof(paged_addr);
77 xfer[DA9063_PAGED_READ_MSG_REG_SEL].buf = &paged_addr;
78
79 /* Read data */
80 xfer[DA9063_PAGED_READ_MSG_DATA].addr = client->addr;
81 xfer[DA9063_PAGED_READ_MSG_DATA].flags = I2C_M_RD;
82 xfer[DA9063_PAGED_READ_MSG_DATA].len = count;
83 xfer[DA9063_PAGED_READ_MSG_DATA].buf = buf;
84
85 ret = i2c_transfer(client->adapter, xfer, DA9063_PAGED_READ_MSG_CNT);
86 if (ret < 0) {
87 dev_err(&client->dev, "Paged block read failed: %d\n", ret);
88 return ret;
89 }
90
91 if (ret != DA9063_PAGED_READ_MSG_CNT) {
92 dev_err(&client->dev, "Paged block read failed to complete\n");
93 return -EIO;
94 }
95
96 return 0;
97}
98
99enum {
100 DA9063_DEV_ID_REG = 0,
101 DA9063_VAR_ID_REG,
102 DA9063_CHIP_ID_REGS,
103};
104
105static int da9063_get_device_type(struct i2c_client *i2c, struct da9063 *da9063)
106{
107 u8 buf[DA9063_CHIP_ID_REGS];
108 int ret;
109
110 ret = da9063_i2c_blockreg_read(i2c, DA9063_REG_DEVICE_ID, buf,
111 DA9063_CHIP_ID_REGS);
112 if (ret)
113 return ret;
114
115 if (buf[DA9063_DEV_ID_REG] != PMIC_CHIP_ID_DA9063) {
116 dev_err(da9063->dev,
117 "Invalid chip device ID: 0x%02x\n",
118 buf[DA9063_DEV_ID_REG]);
119 return -ENODEV;
120 }
121
122 dev_info(da9063->dev,
123 "Device detected (chip-ID: 0x%02X, var-ID: 0x%02X)\n",
124 buf[DA9063_DEV_ID_REG], buf[DA9063_VAR_ID_REG]);
125
126 da9063->variant_code =
127 (buf[DA9063_VAR_ID_REG] & DA9063_VARIANT_ID_MRC_MASK)
128 >> DA9063_VARIANT_ID_MRC_SHIFT;
129
130 return 0;
131}
132
133/*
134 * Variant specific regmap configs
135 */
136
137static const struct regmap_range da9063_ad_readable_ranges[] = {
138 regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_AD_REG_SECOND_D),
139 regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_ID_32_31),
140 regmap_reg_range(DA9063_REG_SEQ_A, DA9063_REG_AUTO3_LOW),
141 regmap_reg_range(DA9063_REG_T_OFFSET, DA9063_AD_REG_GP_ID_19),
142 regmap_reg_range(DA9063_REG_DEVICE_ID, DA9063_REG_VARIANT_ID),
143};
144
145static const struct regmap_range da9063_ad_writeable_ranges[] = {
146 regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_REG_PAGE_CON),
147 regmap_reg_range(DA9063_REG_FAULT_LOG, DA9063_REG_VSYS_MON),
148 regmap_reg_range(DA9063_REG_COUNT_S, DA9063_AD_REG_ALARM_Y),
149 regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_ID_32_31),
150 regmap_reg_range(DA9063_REG_SEQ_A, DA9063_REG_AUTO3_LOW),
151 regmap_reg_range(DA9063_REG_CONFIG_I, DA9063_AD_REG_MON_REG_4),
152 regmap_reg_range(DA9063_AD_REG_GP_ID_0, DA9063_AD_REG_GP_ID_19),
153};
154
155static const struct regmap_range da9063_ad_volatile_ranges[] = {
156 regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_REG_EVENT_D),
157 regmap_reg_range(DA9063_REG_CONTROL_A, DA9063_REG_CONTROL_B),
158 regmap_reg_range(DA9063_REG_CONTROL_E, DA9063_REG_CONTROL_F),
159 regmap_reg_range(DA9063_REG_BCORE2_CONT, DA9063_REG_LDO11_CONT),
160 regmap_reg_range(DA9063_REG_DVC_1, DA9063_REG_ADC_MAN),
161 regmap_reg_range(DA9063_REG_ADC_RES_L, DA9063_AD_REG_SECOND_D),
162 regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_SEQ),
163 regmap_reg_range(DA9063_REG_EN_32K, DA9063_REG_EN_32K),
164 regmap_reg_range(DA9063_AD_REG_MON_REG_5, DA9063_AD_REG_MON_REG_6),
165};
166
167static const struct regmap_access_table da9063_ad_readable_table = {
168 .yes_ranges = da9063_ad_readable_ranges,
169 .n_yes_ranges = ARRAY_SIZE(da9063_ad_readable_ranges),
170};
171
172static const struct regmap_access_table da9063_ad_writeable_table = {
173 .yes_ranges = da9063_ad_writeable_ranges,
174 .n_yes_ranges = ARRAY_SIZE(da9063_ad_writeable_ranges),
175};
176
177static const struct regmap_access_table da9063_ad_volatile_table = {
178 .yes_ranges = da9063_ad_volatile_ranges,
179 .n_yes_ranges = ARRAY_SIZE(da9063_ad_volatile_ranges),
180};
181
182static const struct regmap_range da9063_bb_readable_ranges[] = {
183 regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_BB_REG_SECOND_D),
184 regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_ID_32_31),
185 regmap_reg_range(DA9063_REG_SEQ_A, DA9063_REG_AUTO3_LOW),
186 regmap_reg_range(DA9063_REG_T_OFFSET, DA9063_BB_REG_GP_ID_19),
187 regmap_reg_range(DA9063_REG_DEVICE_ID, DA9063_REG_VARIANT_ID),
188};
189
190static const struct regmap_range da9063_bb_writeable_ranges[] = {
191 regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_REG_PAGE_CON),
192 regmap_reg_range(DA9063_REG_FAULT_LOG, DA9063_REG_VSYS_MON),
193 regmap_reg_range(DA9063_REG_COUNT_S, DA9063_BB_REG_ALARM_Y),
194 regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_ID_32_31),
195 regmap_reg_range(DA9063_REG_SEQ_A, DA9063_REG_AUTO3_LOW),
196 regmap_reg_range(DA9063_REG_CONFIG_I, DA9063_BB_REG_MON_REG_4),
197 regmap_reg_range(DA9063_BB_REG_GP_ID_0, DA9063_BB_REG_GP_ID_19),
198};
199
200static const struct regmap_range da9063_bb_da_volatile_ranges[] = {
201 regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_REG_EVENT_D),
202 regmap_reg_range(DA9063_REG_CONTROL_A, DA9063_REG_CONTROL_B),
203 regmap_reg_range(DA9063_REG_CONTROL_E, DA9063_REG_CONTROL_F),
204 regmap_reg_range(DA9063_REG_BCORE2_CONT, DA9063_REG_LDO11_CONT),
205 regmap_reg_range(DA9063_REG_DVC_1, DA9063_REG_ADC_MAN),
206 regmap_reg_range(DA9063_REG_ADC_RES_L, DA9063_BB_REG_SECOND_D),
207 regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_SEQ),
208 regmap_reg_range(DA9063_REG_EN_32K, DA9063_REG_EN_32K),
209 regmap_reg_range(DA9063_BB_REG_MON_REG_5, DA9063_BB_REG_MON_REG_6),
210};
211
212static const struct regmap_access_table da9063_bb_readable_table = {
213 .yes_ranges = da9063_bb_readable_ranges,
214 .n_yes_ranges = ARRAY_SIZE(da9063_bb_readable_ranges),
215};
216
217static const struct regmap_access_table da9063_bb_writeable_table = {
218 .yes_ranges = da9063_bb_writeable_ranges,
219 .n_yes_ranges = ARRAY_SIZE(da9063_bb_writeable_ranges),
220};
221
222static const struct regmap_access_table da9063_bb_da_volatile_table = {
223 .yes_ranges = da9063_bb_da_volatile_ranges,
224 .n_yes_ranges = ARRAY_SIZE(da9063_bb_da_volatile_ranges),
225};
226
227static const struct regmap_range da9063l_bb_readable_ranges[] = {
228 regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_REG_MON_A10_RES),
229 regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_ID_32_31),
230 regmap_reg_range(DA9063_REG_SEQ_A, DA9063_REG_AUTO3_LOW),
231 regmap_reg_range(DA9063_REG_T_OFFSET, DA9063_BB_REG_GP_ID_19),
232 regmap_reg_range(DA9063_REG_DEVICE_ID, DA9063_REG_VARIANT_ID),
233};
234
235static const struct regmap_range da9063l_bb_writeable_ranges[] = {
236 regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_REG_PAGE_CON),
237 regmap_reg_range(DA9063_REG_FAULT_LOG, DA9063_REG_VSYS_MON),
238 regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_ID_32_31),
239 regmap_reg_range(DA9063_REG_SEQ_A, DA9063_REG_AUTO3_LOW),
240 regmap_reg_range(DA9063_REG_CONFIG_I, DA9063_BB_REG_MON_REG_4),
241 regmap_reg_range(DA9063_BB_REG_GP_ID_0, DA9063_BB_REG_GP_ID_19),
242};
243
244static const struct regmap_range da9063l_bb_da_volatile_ranges[] = {
245 regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_REG_EVENT_D),
246 regmap_reg_range(DA9063_REG_CONTROL_A, DA9063_REG_CONTROL_B),
247 regmap_reg_range(DA9063_REG_CONTROL_E, DA9063_REG_CONTROL_F),
248 regmap_reg_range(DA9063_REG_BCORE2_CONT, DA9063_REG_LDO11_CONT),
249 regmap_reg_range(DA9063_REG_DVC_1, DA9063_REG_ADC_MAN),
250 regmap_reg_range(DA9063_REG_ADC_RES_L, DA9063_REG_MON_A10_RES),
251 regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_SEQ),
252 regmap_reg_range(DA9063_REG_EN_32K, DA9063_REG_EN_32K),
253 regmap_reg_range(DA9063_BB_REG_MON_REG_5, DA9063_BB_REG_MON_REG_6),
254};
255
256static const struct regmap_access_table da9063l_bb_readable_table = {
257 .yes_ranges = da9063l_bb_readable_ranges,
258 .n_yes_ranges = ARRAY_SIZE(da9063l_bb_readable_ranges),
259};
260
261static const struct regmap_access_table da9063l_bb_writeable_table = {
262 .yes_ranges = da9063l_bb_writeable_ranges,
263 .n_yes_ranges = ARRAY_SIZE(da9063l_bb_writeable_ranges),
264};
265
266static const struct regmap_access_table da9063l_bb_da_volatile_table = {
267 .yes_ranges = da9063l_bb_da_volatile_ranges,
268 .n_yes_ranges = ARRAY_SIZE(da9063l_bb_da_volatile_ranges),
269};
270
271static const struct regmap_range da9063_da_readable_ranges[] = {
272 regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_BB_REG_SECOND_D),
273 regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_ID_32_31),
274 regmap_reg_range(DA9063_REG_SEQ_A, DA9063_REG_AUTO3_LOW),
275 regmap_reg_range(DA9063_REG_T_OFFSET, DA9063_BB_REG_GP_ID_11),
276 regmap_reg_range(DA9063_REG_DEVICE_ID, DA9063_REG_VARIANT_ID),
277};
278
279static const struct regmap_range da9063_da_writeable_ranges[] = {
280 regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_REG_PAGE_CON),
281 regmap_reg_range(DA9063_REG_FAULT_LOG, DA9063_REG_VSYS_MON),
282 regmap_reg_range(DA9063_REG_COUNT_S, DA9063_BB_REG_ALARM_Y),
283 regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_ID_32_31),
284 regmap_reg_range(DA9063_REG_SEQ_A, DA9063_REG_AUTO3_LOW),
285 regmap_reg_range(DA9063_REG_CONFIG_I, DA9063_BB_REG_MON_REG_4),
286 regmap_reg_range(DA9063_BB_REG_GP_ID_0, DA9063_BB_REG_GP_ID_11),
287};
288
289static const struct regmap_access_table da9063_da_readable_table = {
290 .yes_ranges = da9063_da_readable_ranges,
291 .n_yes_ranges = ARRAY_SIZE(da9063_da_readable_ranges),
292};
293
294static const struct regmap_access_table da9063_da_writeable_table = {
295 .yes_ranges = da9063_da_writeable_ranges,
296 .n_yes_ranges = ARRAY_SIZE(da9063_da_writeable_ranges),
297};
298
299static const struct regmap_range da9063l_da_readable_ranges[] = {
300 regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_REG_MON_A10_RES),
301 regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_ID_32_31),
302 regmap_reg_range(DA9063_REG_SEQ_A, DA9063_REG_AUTO3_LOW),
303 regmap_reg_range(DA9063_REG_T_OFFSET, DA9063_BB_REG_GP_ID_11),
304 regmap_reg_range(DA9063_REG_DEVICE_ID, DA9063_REG_VARIANT_ID),
305};
306
307static const struct regmap_range da9063l_da_writeable_ranges[] = {
308 regmap_reg_range(DA9063_REG_PAGE_CON, DA9063_REG_PAGE_CON),
309 regmap_reg_range(DA9063_REG_FAULT_LOG, DA9063_REG_VSYS_MON),
310 regmap_reg_range(DA9063_REG_SEQ, DA9063_REG_ID_32_31),
311 regmap_reg_range(DA9063_REG_SEQ_A, DA9063_REG_AUTO3_LOW),
312 regmap_reg_range(DA9063_REG_CONFIG_I, DA9063_BB_REG_MON_REG_4),
313 regmap_reg_range(DA9063_BB_REG_GP_ID_0, DA9063_BB_REG_GP_ID_11),
314};
315
316static const struct regmap_access_table da9063l_da_readable_table = {
317 .yes_ranges = da9063l_da_readable_ranges,
318 .n_yes_ranges = ARRAY_SIZE(da9063l_da_readable_ranges),
319};
320
321static const struct regmap_access_table da9063l_da_writeable_table = {
322 .yes_ranges = da9063l_da_writeable_ranges,
323 .n_yes_ranges = ARRAY_SIZE(da9063l_da_writeable_ranges),
324};
325
326static const struct regmap_range_cfg da9063_range_cfg[] = {
327 {
328 .range_min = DA9063_REG_PAGE_CON,
329 .range_max = DA9063_REG_CONFIG_ID,
330 .selector_reg = DA9063_REG_PAGE_CON,
331 .selector_mask = 1 << DA9063_I2C_PAGE_SEL_SHIFT,
332 .selector_shift = DA9063_I2C_PAGE_SEL_SHIFT,
333 .window_start = 0,
334 .window_len = 256,
335 }
336};
337
338static struct regmap_config da9063_regmap_config = {
339 .reg_bits = 8,
340 .val_bits = 8,
341 .ranges = da9063_range_cfg,
342 .num_ranges = ARRAY_SIZE(da9063_range_cfg),
343 .max_register = DA9063_REG_CONFIG_ID,
344
345 .cache_type = REGCACHE_RBTREE,
346};
347
348static const struct of_device_id da9063_dt_ids[] = {
349 { .compatible = "dlg,da9063", },
350 { .compatible = "dlg,da9063l", },
351 { }
352};
353MODULE_DEVICE_TABLE(of, da9063_dt_ids);
354static int da9063_i2c_probe(struct i2c_client *i2c,
355 const struct i2c_device_id *id)
356{
357 struct da9063 *da9063;
358 int ret;
359
360 da9063 = devm_kzalloc(&i2c->dev, sizeof(struct da9063), GFP_KERNEL);
361 if (da9063 == NULL)
362 return -ENOMEM;
363
364 i2c_set_clientdata(i2c, da9063);
365 da9063->dev = &i2c->dev;
366 da9063->chip_irq = i2c->irq;
367 da9063->type = id->driver_data;
368
369 ret = da9063_get_device_type(i2c, da9063);
370 if (ret)
371 return ret;
372
373 switch (da9063->type) {
374 case PMIC_TYPE_DA9063:
375 switch (da9063->variant_code) {
376 case PMIC_DA9063_AD:
377 da9063_regmap_config.rd_table =
378 &da9063_ad_readable_table;
379 da9063_regmap_config.wr_table =
380 &da9063_ad_writeable_table;
381 da9063_regmap_config.volatile_table =
382 &da9063_ad_volatile_table;
383 break;
384 case PMIC_DA9063_BB:
385 case PMIC_DA9063_CA:
386 da9063_regmap_config.rd_table =
387 &da9063_bb_readable_table;
388 da9063_regmap_config.wr_table =
389 &da9063_bb_writeable_table;
390 da9063_regmap_config.volatile_table =
391 &da9063_bb_da_volatile_table;
392 break;
393 case PMIC_DA9063_DA:
394 da9063_regmap_config.rd_table =
395 &da9063_da_readable_table;
396 da9063_regmap_config.wr_table =
397 &da9063_da_writeable_table;
398 da9063_regmap_config.volatile_table =
399 &da9063_bb_da_volatile_table;
400 break;
401 default:
402 dev_err(da9063->dev,
403 "Chip variant not supported for DA9063\n");
404 return -ENODEV;
405 }
406 break;
407 case PMIC_TYPE_DA9063L:
408 switch (da9063->variant_code) {
409 case PMIC_DA9063_BB:
410 case PMIC_DA9063_CA:
411 da9063_regmap_config.rd_table =
412 &da9063l_bb_readable_table;
413 da9063_regmap_config.wr_table =
414 &da9063l_bb_writeable_table;
415 da9063_regmap_config.volatile_table =
416 &da9063l_bb_da_volatile_table;
417 break;
418 case PMIC_DA9063_DA:
419 da9063_regmap_config.rd_table =
420 &da9063l_da_readable_table;
421 da9063_regmap_config.wr_table =
422 &da9063l_da_writeable_table;
423 da9063_regmap_config.volatile_table =
424 &da9063l_bb_da_volatile_table;
425 break;
426 default:
427 dev_err(da9063->dev,
428 "Chip variant not supported for DA9063L\n");
429 return -ENODEV;
430 }
431 break;
432 default:
433 dev_err(da9063->dev, "Chip type not supported\n");
434 return -ENODEV;
435 }
436
437 da9063->regmap = devm_regmap_init_i2c(i2c, &da9063_regmap_config);
438 if (IS_ERR(da9063->regmap)) {
439 ret = PTR_ERR(da9063->regmap);
440 dev_err(da9063->dev, "Failed to allocate register map: %d\n",
441 ret);
442 return ret;
443 }
444
445 /* If SMBus is not available and only I2C is possible, enter I2C mode */
446 if (i2c_check_functionality(i2c->adapter, I2C_FUNC_I2C)) {
447 ret = regmap_clear_bits(da9063->regmap, DA9063_REG_CONFIG_J,
448 DA9063_TWOWIRE_TO);
449 if (ret < 0) {
450 dev_err(da9063->dev, "Failed to set Two-Wire Bus Mode.\n");
451 return ret;
452 }
453 }
454
455 return da9063_device_init(da9063, i2c->irq);
456}
457
458static const struct i2c_device_id da9063_i2c_id[] = {
459 { "da9063", PMIC_TYPE_DA9063 },
460 { "da9063l", PMIC_TYPE_DA9063L },
461 {},
462};
463MODULE_DEVICE_TABLE(i2c, da9063_i2c_id);
464
465static struct i2c_driver da9063_i2c_driver = {
466 .driver = {
467 .name = "da9063",
468 .of_match_table = da9063_dt_ids,
469 },
470 .probe = da9063_i2c_probe,
471 .id_table = da9063_i2c_id,
472};
473
474module_i2c_driver(da9063_i2c_driver);