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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 
34 enum 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 
40 enum 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 
da9063_i2c_blockreg_read(struct i2c_client * client,u16 addr,u8 * buf,int count)47 static 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 
99 enum {
100 	DA9063_DEV_ID_REG = 0,
101 	DA9063_VAR_ID_REG,
102 	DA9063_CHIP_ID_REGS,
103 };
104 
da9063_get_device_type(struct i2c_client * i2c,struct da9063 * da9063)105 static 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 
137 static 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 
145 static 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 
155 static 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 
167 static 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 
172 static 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 
177 static 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 
182 static 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 
190 static 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 
200 static 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 
212 static 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 
217 static 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 
222 static 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 
227 static 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 
235 static 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 
244 static 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 
256 static 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 
261 static 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 
266 static 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 
271 static 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 
279 static 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 
289 static 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 
294 static 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 
299 static 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 
307 static 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 
316 static 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 
321 static 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 
326 static 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 
338 static 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 
348 static const struct of_device_id da9063_dt_ids[] = {
349 	{ .compatible = "dlg,da9063", },
350 	{ .compatible = "dlg,da9063l", },
351 	{ }
352 };
353 MODULE_DEVICE_TABLE(of, da9063_dt_ids);
da9063_i2c_probe(struct i2c_client * i2c,const struct i2c_device_id * id)354 static 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 -EIO;
452 		}
453 	}
454 
455 	return da9063_device_init(da9063, i2c->irq);
456 }
457 
458 static const struct i2c_device_id da9063_i2c_id[] = {
459 	{ "da9063", PMIC_TYPE_DA9063 },
460 	{ "da9063l", PMIC_TYPE_DA9063L },
461 	{},
462 };
463 MODULE_DEVICE_TABLE(i2c, da9063_i2c_id);
464 
465 static struct i2c_driver da9063_i2c_driver = {
466 	.driver = {
467 		.name = "da9063",
468 		.of_match_table = of_match_ptr(da9063_dt_ids),
469 	},
470 	.probe    = da9063_i2c_probe,
471 	.id_table = da9063_i2c_id,
472 };
473 
474 module_i2c_driver(da9063_i2c_driver);
475