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10#include <linux/bits.h>
11#include <linux/debugfs.h>
12#include <linux/err.h>
13#include <linux/i2c.h>
14#include <linux/init.h>
15#include <linux/kernel.h>
16#include <linux/module.h>
17#include <linux/mutex.h>
18#include <linux/of_device.h>
19#include <linux/pmbus.h>
20#include <linux/util_macros.h>
21#include "pmbus.h"
22
23enum chips {
24 max20710,
25 max20730,
26 max20734,
27 max20743
28};
29
30enum {
31 MAX20730_DEBUGFS_VOUT_MIN = 0,
32 MAX20730_DEBUGFS_FREQUENCY,
33 MAX20730_DEBUGFS_PG_DELAY,
34 MAX20730_DEBUGFS_INTERNAL_GAIN,
35 MAX20730_DEBUGFS_BOOT_VOLTAGE,
36 MAX20730_DEBUGFS_OUT_V_RAMP_RATE,
37 MAX20730_DEBUGFS_OC_PROTECT_MODE,
38 MAX20730_DEBUGFS_SS_TIMING,
39 MAX20730_DEBUGFS_IMAX,
40 MAX20730_DEBUGFS_OPERATION,
41 MAX20730_DEBUGFS_ON_OFF_CONFIG,
42 MAX20730_DEBUGFS_SMBALERT_MASK,
43 MAX20730_DEBUGFS_VOUT_MODE,
44 MAX20730_DEBUGFS_VOUT_COMMAND,
45 MAX20730_DEBUGFS_VOUT_MAX,
46 MAX20730_DEBUGFS_NUM_ENTRIES
47};
48
49struct max20730_data {
50 enum chips id;
51 struct pmbus_driver_info info;
52 struct mutex lock;
53 u16 mfr_devset1;
54 u16 mfr_devset2;
55 u16 mfr_voutmin;
56 u32 vout_voltage_divider[2];
57};
58
59#define to_max20730_data(x) container_of(x, struct max20730_data, info)
60
61#define VOLT_FROM_REG(val) DIV_ROUND_CLOSEST((val), 1 << 9)
62
63#define PMBUS_SMB_ALERT_MASK 0x1B
64
65#define MAX20730_MFR_VOUT_MIN 0xd1
66#define MAX20730_MFR_DEVSET1 0xd2
67#define MAX20730_MFR_DEVSET2 0xd3
68
69#define MAX20730_MFR_VOUT_MIN_MASK GENMASK(9, 0)
70#define MAX20730_MFR_VOUT_MIN_BIT_POS 0
71
72#define MAX20730_MFR_DEVSET1_RGAIN_MASK (BIT(13) | BIT(14))
73#define MAX20730_MFR_DEVSET1_OTP_MASK (BIT(11) | BIT(12))
74#define MAX20730_MFR_DEVSET1_VBOOT_MASK (BIT(8) | BIT(9))
75#define MAX20730_MFR_DEVSET1_OCP_MASK (BIT(5) | BIT(6))
76#define MAX20730_MFR_DEVSET1_FSW_MASK GENMASK(4, 2)
77#define MAX20730_MFR_DEVSET1_TSTAT_MASK (BIT(0) | BIT(1))
78
79#define MAX20730_MFR_DEVSET1_RGAIN_BIT_POS 13
80#define MAX20730_MFR_DEVSET1_OTP_BIT_POS 11
81#define MAX20730_MFR_DEVSET1_VBOOT_BIT_POS 8
82#define MAX20730_MFR_DEVSET1_OCP_BIT_POS 5
83#define MAX20730_MFR_DEVSET1_FSW_BIT_POS 2
84#define MAX20730_MFR_DEVSET1_TSTAT_BIT_POS 0
85
86#define MAX20730_MFR_DEVSET2_IMAX_MASK GENMASK(10, 8)
87#define MAX20730_MFR_DEVSET2_VRATE (BIT(6) | BIT(7))
88#define MAX20730_MFR_DEVSET2_OCPM_MASK BIT(5)
89#define MAX20730_MFR_DEVSET2_SS_MASK (BIT(0) | BIT(1))
90
91#define MAX20730_MFR_DEVSET2_IMAX_BIT_POS 8
92#define MAX20730_MFR_DEVSET2_VRATE_BIT_POS 6
93#define MAX20730_MFR_DEVSET2_OCPM_BIT_POS 5
94#define MAX20730_MFR_DEVSET2_SS_BIT_POS 0
95
96#define DEBUG_FS_DATA_MAX 16
97
98struct max20730_debugfs_data {
99 struct i2c_client *client;
100 int debugfs_entries[MAX20730_DEBUGFS_NUM_ENTRIES];
101};
102
103#define to_psu(x, y) container_of((x), \
104 struct max20730_debugfs_data, debugfs_entries[(y)])
105
106#ifdef CONFIG_DEBUG_FS
107static ssize_t max20730_debugfs_read(struct file *file, char __user *buf,
108 size_t count, loff_t *ppos)
109{
110 int ret, len;
111 int *idxp = file->private_data;
112 int idx = *idxp;
113 struct max20730_debugfs_data *psu = to_psu(idxp, idx);
114 const struct pmbus_driver_info *info;
115 const struct max20730_data *data;
116 char tbuf[DEBUG_FS_DATA_MAX] = { 0 };
117 u16 val;
118
119 info = pmbus_get_driver_info(psu->client);
120 data = to_max20730_data(info);
121
122 switch (idx) {
123 case MAX20730_DEBUGFS_VOUT_MIN:
124 ret = VOLT_FROM_REG(data->mfr_voutmin * 10000);
125 len = scnprintf(tbuf, DEBUG_FS_DATA_MAX, "%d.%d\n",
126 ret / 10000, ret % 10000);
127 break;
128 case MAX20730_DEBUGFS_FREQUENCY:
129 val = (data->mfr_devset1 & MAX20730_MFR_DEVSET1_FSW_MASK)
130 >> MAX20730_MFR_DEVSET1_FSW_BIT_POS;
131
132 if (val == 0)
133 ret = 400;
134 else if (val == 1)
135 ret = 500;
136 else if (val == 2 || val == 3)
137 ret = 600;
138 else if (val == 4)
139 ret = 700;
140 else if (val == 5)
141 ret = 800;
142 else
143 ret = 900;
144 len = scnprintf(tbuf, DEBUG_FS_DATA_MAX, "%d\n", ret);
145 break;
146 case MAX20730_DEBUGFS_PG_DELAY:
147 val = (data->mfr_devset1 & MAX20730_MFR_DEVSET1_TSTAT_MASK)
148 >> MAX20730_MFR_DEVSET1_TSTAT_BIT_POS;
149
150 if (val == 0)
151 len = strlcpy(tbuf, "2000\n", DEBUG_FS_DATA_MAX);
152 else if (val == 1)
153 len = strlcpy(tbuf, "125\n", DEBUG_FS_DATA_MAX);
154 else if (val == 2)
155 len = strlcpy(tbuf, "62.5\n", DEBUG_FS_DATA_MAX);
156 else
157 len = strlcpy(tbuf, "32\n", DEBUG_FS_DATA_MAX);
158 break;
159 case MAX20730_DEBUGFS_INTERNAL_GAIN:
160 val = (data->mfr_devset1 & MAX20730_MFR_DEVSET1_RGAIN_MASK)
161 >> MAX20730_MFR_DEVSET1_RGAIN_BIT_POS;
162
163 if (data->id == max20734) {
164
165 if (val == 0)
166 len = strlcpy(tbuf, "0.8\n", DEBUG_FS_DATA_MAX);
167 else if (val == 1)
168 len = strlcpy(tbuf, "3.2\n", DEBUG_FS_DATA_MAX);
169 else if (val == 2)
170 len = strlcpy(tbuf, "1.6\n", DEBUG_FS_DATA_MAX);
171 else
172 len = strlcpy(tbuf, "6.4\n", DEBUG_FS_DATA_MAX);
173 } else if (data->id == max20730 || data->id == max20710) {
174
175 if (val == 0)
176 len = strlcpy(tbuf, "0.9\n", DEBUG_FS_DATA_MAX);
177 else if (val == 1)
178 len = strlcpy(tbuf, "3.6\n", DEBUG_FS_DATA_MAX);
179 else if (val == 2)
180 len = strlcpy(tbuf, "1.8\n", DEBUG_FS_DATA_MAX);
181 else
182 len = strlcpy(tbuf, "7.2\n", DEBUG_FS_DATA_MAX);
183 } else if (data->id == max20743) {
184
185 if (val == 0)
186 len = strlcpy(tbuf, "0.45\n", DEBUG_FS_DATA_MAX);
187 else if (val == 1)
188 len = strlcpy(tbuf, "1.8\n", DEBUG_FS_DATA_MAX);
189 else if (val == 2)
190 len = strlcpy(tbuf, "0.9\n", DEBUG_FS_DATA_MAX);
191 else
192 len = strlcpy(tbuf, "3.6\n", DEBUG_FS_DATA_MAX);
193 } else {
194 len = strlcpy(tbuf, "Not supported\n", DEBUG_FS_DATA_MAX);
195 }
196 break;
197 case MAX20730_DEBUGFS_BOOT_VOLTAGE:
198 val = (data->mfr_devset1 & MAX20730_MFR_DEVSET1_VBOOT_MASK)
199 >> MAX20730_MFR_DEVSET1_VBOOT_BIT_POS;
200
201 if (val == 0)
202 len = strlcpy(tbuf, "0.6484\n", DEBUG_FS_DATA_MAX);
203 else if (val == 1)
204 len = strlcpy(tbuf, "0.8984\n", DEBUG_FS_DATA_MAX);
205 else if (val == 2)
206 len = strlcpy(tbuf, "1.0\n", DEBUG_FS_DATA_MAX);
207 else
208 len = strlcpy(tbuf, "Invalid\n", DEBUG_FS_DATA_MAX);
209 break;
210 case MAX20730_DEBUGFS_OUT_V_RAMP_RATE:
211 val = (data->mfr_devset2 & MAX20730_MFR_DEVSET2_VRATE)
212 >> MAX20730_MFR_DEVSET2_VRATE_BIT_POS;
213
214 if (val == 0)
215 len = strlcpy(tbuf, "4\n", DEBUG_FS_DATA_MAX);
216 else if (val == 1)
217 len = strlcpy(tbuf, "2\n", DEBUG_FS_DATA_MAX);
218 else if (val == 2)
219 len = strlcpy(tbuf, "1\n", DEBUG_FS_DATA_MAX);
220 else
221 len = strlcpy(tbuf, "Invalid\n", DEBUG_FS_DATA_MAX);
222 break;
223 case MAX20730_DEBUGFS_OC_PROTECT_MODE:
224 ret = (data->mfr_devset2 & MAX20730_MFR_DEVSET2_OCPM_MASK)
225 >> MAX20730_MFR_DEVSET2_OCPM_BIT_POS;
226 len = scnprintf(tbuf, DEBUG_FS_DATA_MAX, "%d\n", ret);
227 break;
228 case MAX20730_DEBUGFS_SS_TIMING:
229 val = (data->mfr_devset2 & MAX20730_MFR_DEVSET2_SS_MASK)
230 >> MAX20730_MFR_DEVSET2_SS_BIT_POS;
231
232 if (val == 0)
233 len = strlcpy(tbuf, "0.75\n", DEBUG_FS_DATA_MAX);
234 else if (val == 1)
235 len = strlcpy(tbuf, "1.5\n", DEBUG_FS_DATA_MAX);
236 else if (val == 2)
237 len = strlcpy(tbuf, "3\n", DEBUG_FS_DATA_MAX);
238 else
239 len = strlcpy(tbuf, "6\n", DEBUG_FS_DATA_MAX);
240 break;
241 case MAX20730_DEBUGFS_IMAX:
242 ret = (data->mfr_devset2 & MAX20730_MFR_DEVSET2_IMAX_MASK)
243 >> MAX20730_MFR_DEVSET2_IMAX_BIT_POS;
244 len = scnprintf(tbuf, DEBUG_FS_DATA_MAX, "%d\n", ret);
245 break;
246 case MAX20730_DEBUGFS_OPERATION:
247 ret = i2c_smbus_read_byte_data(psu->client, PMBUS_OPERATION);
248 if (ret < 0)
249 return ret;
250 len = scnprintf(tbuf, DEBUG_FS_DATA_MAX, "%d\n", ret);
251 break;
252 case MAX20730_DEBUGFS_ON_OFF_CONFIG:
253 ret = i2c_smbus_read_byte_data(psu->client, PMBUS_ON_OFF_CONFIG);
254 if (ret < 0)
255 return ret;
256 len = scnprintf(tbuf, DEBUG_FS_DATA_MAX, "%d\n", ret);
257 break;
258 case MAX20730_DEBUGFS_SMBALERT_MASK:
259 ret = i2c_smbus_read_word_data(psu->client,
260 PMBUS_SMB_ALERT_MASK);
261 if (ret < 0)
262 return ret;
263 len = scnprintf(tbuf, DEBUG_FS_DATA_MAX, "%d\n", ret);
264 break;
265 case MAX20730_DEBUGFS_VOUT_MODE:
266 ret = i2c_smbus_read_byte_data(psu->client, PMBUS_VOUT_MODE);
267 if (ret < 0)
268 return ret;
269 len = scnprintf(tbuf, DEBUG_FS_DATA_MAX, "%d\n", ret);
270 break;
271 case MAX20730_DEBUGFS_VOUT_COMMAND:
272 ret = i2c_smbus_read_word_data(psu->client, PMBUS_VOUT_COMMAND);
273 if (ret < 0)
274 return ret;
275
276 ret = VOLT_FROM_REG(ret * 10000);
277 len = scnprintf(tbuf, DEBUG_FS_DATA_MAX,
278 "%d.%d\n", ret / 10000, ret % 10000);
279 break;
280 case MAX20730_DEBUGFS_VOUT_MAX:
281 ret = i2c_smbus_read_word_data(psu->client, PMBUS_VOUT_MAX);
282 if (ret < 0)
283 return ret;
284
285 ret = VOLT_FROM_REG(ret * 10000);
286 len = scnprintf(tbuf, DEBUG_FS_DATA_MAX,
287 "%d.%d\n", ret / 10000, ret % 10000);
288 break;
289 default:
290 len = strlcpy(tbuf, "Invalid\n", DEBUG_FS_DATA_MAX);
291 }
292
293 return simple_read_from_buffer(buf, count, ppos, tbuf, len);
294}
295
296static const struct file_operations max20730_fops = {
297 .llseek = noop_llseek,
298 .read = max20730_debugfs_read,
299 .write = NULL,
300 .open = simple_open,
301};
302
303static int max20730_init_debugfs(struct i2c_client *client,
304 struct max20730_data *data)
305{
306 int ret, i;
307 struct dentry *debugfs;
308 struct dentry *max20730_dir;
309 struct max20730_debugfs_data *psu;
310
311 ret = i2c_smbus_read_word_data(client, MAX20730_MFR_DEVSET2);
312 if (ret < 0)
313 return ret;
314 data->mfr_devset2 = ret;
315
316 ret = i2c_smbus_read_word_data(client, MAX20730_MFR_VOUT_MIN);
317 if (ret < 0)
318 return ret;
319 data->mfr_voutmin = ret;
320
321 psu = devm_kzalloc(&client->dev, sizeof(*psu), GFP_KERNEL);
322 if (!psu)
323 return -ENOMEM;
324 psu->client = client;
325
326 debugfs = pmbus_get_debugfs_dir(client);
327 if (!debugfs)
328 return -ENOENT;
329
330 max20730_dir = debugfs_create_dir(client->name, debugfs);
331 if (!max20730_dir)
332 return -ENOENT;
333
334 for (i = 0; i < MAX20730_DEBUGFS_NUM_ENTRIES; ++i)
335 psu->debugfs_entries[i] = i;
336
337 debugfs_create_file("vout_min", 0444, max20730_dir,
338 &psu->debugfs_entries[MAX20730_DEBUGFS_VOUT_MIN],
339 &max20730_fops);
340 debugfs_create_file("frequency", 0444, max20730_dir,
341 &psu->debugfs_entries[MAX20730_DEBUGFS_FREQUENCY],
342 &max20730_fops);
343 debugfs_create_file("power_good_delay", 0444, max20730_dir,
344 &psu->debugfs_entries[MAX20730_DEBUGFS_PG_DELAY],
345 &max20730_fops);
346 debugfs_create_file("internal_gain", 0444, max20730_dir,
347 &psu->debugfs_entries[MAX20730_DEBUGFS_INTERNAL_GAIN],
348 &max20730_fops);
349 debugfs_create_file("boot_voltage", 0444, max20730_dir,
350 &psu->debugfs_entries[MAX20730_DEBUGFS_BOOT_VOLTAGE],
351 &max20730_fops);
352 debugfs_create_file("out_voltage_ramp_rate", 0444, max20730_dir,
353 &psu->debugfs_entries[MAX20730_DEBUGFS_OUT_V_RAMP_RATE],
354 &max20730_fops);
355 debugfs_create_file("oc_protection_mode", 0444, max20730_dir,
356 &psu->debugfs_entries[MAX20730_DEBUGFS_OC_PROTECT_MODE],
357 &max20730_fops);
358 debugfs_create_file("soft_start_timing", 0444, max20730_dir,
359 &psu->debugfs_entries[MAX20730_DEBUGFS_SS_TIMING],
360 &max20730_fops);
361 debugfs_create_file("imax", 0444, max20730_dir,
362 &psu->debugfs_entries[MAX20730_DEBUGFS_IMAX],
363 &max20730_fops);
364 debugfs_create_file("operation", 0444, max20730_dir,
365 &psu->debugfs_entries[MAX20730_DEBUGFS_OPERATION],
366 &max20730_fops);
367 debugfs_create_file("on_off_config", 0444, max20730_dir,
368 &psu->debugfs_entries[MAX20730_DEBUGFS_ON_OFF_CONFIG],
369 &max20730_fops);
370 debugfs_create_file("smbalert_mask", 0444, max20730_dir,
371 &psu->debugfs_entries[MAX20730_DEBUGFS_SMBALERT_MASK],
372 &max20730_fops);
373 debugfs_create_file("vout_mode", 0444, max20730_dir,
374 &psu->debugfs_entries[MAX20730_DEBUGFS_VOUT_MODE],
375 &max20730_fops);
376 debugfs_create_file("vout_command", 0444, max20730_dir,
377 &psu->debugfs_entries[MAX20730_DEBUGFS_VOUT_COMMAND],
378 &max20730_fops);
379 debugfs_create_file("vout_max", 0444, max20730_dir,
380 &psu->debugfs_entries[MAX20730_DEBUGFS_VOUT_MAX],
381 &max20730_fops);
382
383 return 0;
384}
385#else
386static int max20730_init_debugfs(struct i2c_client *client,
387 struct max20730_data *data)
388{
389 return 0;
390}
391#endif
392
393static const struct i2c_device_id max20730_id[];
394
395
396
397
398
399
400
401static u16 val_to_direct(int v, enum pmbus_sensor_classes class,
402 const struct pmbus_driver_info *info)
403{
404 int R = info->R[class] - 3;
405 int b = info->b[class] * 1000;
406 long d;
407
408 d = v * info->m[class] + b;
409
410
411
412
413 while (R < 0) {
414 d = DIV_ROUND_CLOSEST(d, 10);
415 R++;
416 }
417 return (u16)d;
418}
419
420static long direct_to_val(u16 w, enum pmbus_sensor_classes class,
421 const struct pmbus_driver_info *info)
422{
423 int R = info->R[class] - 3;
424 int b = info->b[class] * 1000;
425 int m = info->m[class];
426 long d = (s16)w;
427
428 if (m == 0)
429 return 0;
430
431 while (R < 0) {
432 d *= 10;
433 R++;
434 }
435 d = (d - b) / m;
436 return d;
437}
438
439static u32 max_current[][5] = {
440 [max20710] = { 6200, 8000, 9700, 11600 },
441 [max20730] = { 13000, 16600, 20100, 23600 },
442 [max20734] = { 21000, 27000, 32000, 38000 },
443 [max20743] = { 18900, 24100, 29200, 34100 },
444};
445
446static int max20730_read_word_data(struct i2c_client *client, int page,
447 int phase, int reg)
448{
449 const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
450 const struct max20730_data *data = to_max20730_data(info);
451 int ret = 0;
452 u32 max_c;
453
454 switch (reg) {
455 case PMBUS_OT_FAULT_LIMIT:
456 switch ((data->mfr_devset1 >> 11) & 0x3) {
457 case 0x0:
458 ret = val_to_direct(150000, PSC_TEMPERATURE, info);
459 break;
460 case 0x1:
461 ret = val_to_direct(130000, PSC_TEMPERATURE, info);
462 break;
463 default:
464 ret = -ENODATA;
465 break;
466 }
467 break;
468 case PMBUS_IOUT_OC_FAULT_LIMIT:
469 max_c = max_current[data->id][(data->mfr_devset1 >> 5) & 0x3];
470 ret = val_to_direct(max_c, PSC_CURRENT_OUT, info);
471 break;
472 case PMBUS_READ_VOUT:
473 ret = pmbus_read_word_data(client, page, phase, reg);
474 if (ret > 0 && data->vout_voltage_divider[0] && data->vout_voltage_divider[1]) {
475 u64 temp = DIV_ROUND_CLOSEST_ULL((u64)ret * data->vout_voltage_divider[1],
476 data->vout_voltage_divider[0]);
477 ret = clamp_val(temp, 0, 0xffff);
478 }
479 break;
480 default:
481 ret = -ENODATA;
482 break;
483 }
484 return ret;
485}
486
487static int max20730_write_word_data(struct i2c_client *client, int page,
488 int reg, u16 word)
489{
490 struct pmbus_driver_info *info;
491 struct max20730_data *data;
492 u16 devset1;
493 int ret = 0;
494 int idx;
495
496 info = (struct pmbus_driver_info *)pmbus_get_driver_info(client);
497 data = to_max20730_data(info);
498
499 mutex_lock(&data->lock);
500 devset1 = data->mfr_devset1;
501
502 switch (reg) {
503 case PMBUS_OT_FAULT_LIMIT:
504 devset1 &= ~(BIT(11) | BIT(12));
505 if (direct_to_val(word, PSC_TEMPERATURE, info) < 140000)
506 devset1 |= BIT(11);
507 break;
508 case PMBUS_IOUT_OC_FAULT_LIMIT:
509 devset1 &= ~(BIT(5) | BIT(6));
510
511 idx = find_closest(direct_to_val(word, PSC_CURRENT_OUT, info),
512 max_current[data->id], 4);
513 devset1 |= (idx << 5);
514 break;
515 default:
516 ret = -ENODATA;
517 break;
518 }
519
520 if (!ret && devset1 != data->mfr_devset1) {
521 ret = i2c_smbus_write_word_data(client, MAX20730_MFR_DEVSET1,
522 devset1);
523 if (!ret) {
524 data->mfr_devset1 = devset1;
525 pmbus_clear_cache(client);
526 }
527 }
528 mutex_unlock(&data->lock);
529 return ret;
530}
531
532static const struct pmbus_driver_info max20730_info[] = {
533 [max20710] = {
534 .pages = 1,
535 .read_word_data = max20730_read_word_data,
536 .write_word_data = max20730_write_word_data,
537
538
539 .format[PSC_TEMPERATURE] = direct,
540 .m[PSC_TEMPERATURE] = 21,
541 .b[PSC_TEMPERATURE] = 5887,
542 .R[PSC_TEMPERATURE] = -1,
543
544 .format[PSC_VOLTAGE_IN] = direct,
545 .m[PSC_VOLTAGE_IN] = 3609,
546 .b[PSC_VOLTAGE_IN] = 0,
547 .R[PSC_VOLTAGE_IN] = -2,
548
549 .format[PSC_CURRENT_OUT] = direct,
550 .m[PSC_CURRENT_OUT] = 153,
551 .b[PSC_CURRENT_OUT] = 4976,
552 .R[PSC_CURRENT_OUT] = -1,
553
554 .format[PSC_VOLTAGE_OUT] = linear,
555
556 .func[0] = PMBUS_HAVE_VIN |
557 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
558 PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT |
559 PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP |
560 PMBUS_HAVE_STATUS_INPUT,
561 },
562 [max20730] = {
563 .pages = 1,
564 .read_word_data = max20730_read_word_data,
565 .write_word_data = max20730_write_word_data,
566
567
568 .format[PSC_TEMPERATURE] = direct,
569 .m[PSC_TEMPERATURE] = 21,
570 .b[PSC_TEMPERATURE] = 5887,
571 .R[PSC_TEMPERATURE] = -1,
572
573 .format[PSC_VOLTAGE_IN] = direct,
574 .m[PSC_VOLTAGE_IN] = 3609,
575 .b[PSC_VOLTAGE_IN] = 0,
576 .R[PSC_VOLTAGE_IN] = -2,
577
578
579
580
581
582
583
584
585
586
587
588 .format[PSC_CURRENT_OUT] = direct,
589 .m[PSC_CURRENT_OUT] = 153,
590 .b[PSC_CURRENT_OUT] = 4976,
591 .R[PSC_CURRENT_OUT] = -1,
592
593 .format[PSC_VOLTAGE_OUT] = linear,
594
595 .func[0] = PMBUS_HAVE_VIN |
596 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
597 PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT |
598 PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP |
599 PMBUS_HAVE_STATUS_INPUT,
600 },
601 [max20734] = {
602 .pages = 1,
603 .read_word_data = max20730_read_word_data,
604 .write_word_data = max20730_write_word_data,
605
606
607 .format[PSC_TEMPERATURE] = direct,
608 .m[PSC_TEMPERATURE] = 21,
609 .b[PSC_TEMPERATURE] = 5887,
610 .R[PSC_TEMPERATURE] = -1,
611
612 .format[PSC_VOLTAGE_IN] = direct,
613 .m[PSC_VOLTAGE_IN] = 3592,
614 .b[PSC_VOLTAGE_IN] = 0,
615 .R[PSC_VOLTAGE_IN] = -2,
616
617 .format[PSC_CURRENT_OUT] = direct,
618 .m[PSC_CURRENT_OUT] = 111,
619 .b[PSC_CURRENT_OUT] = 3461,
620 .R[PSC_CURRENT_OUT] = -1,
621
622 .format[PSC_VOLTAGE_OUT] = linear,
623
624 .func[0] = PMBUS_HAVE_VIN |
625 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
626 PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT |
627 PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP |
628 PMBUS_HAVE_STATUS_INPUT,
629 },
630 [max20743] = {
631 .pages = 1,
632 .read_word_data = max20730_read_word_data,
633 .write_word_data = max20730_write_word_data,
634
635
636 .format[PSC_TEMPERATURE] = direct,
637 .m[PSC_TEMPERATURE] = 21,
638 .b[PSC_TEMPERATURE] = 5887,
639 .R[PSC_TEMPERATURE] = -1,
640
641 .format[PSC_VOLTAGE_IN] = direct,
642 .m[PSC_VOLTAGE_IN] = 3597,
643 .b[PSC_VOLTAGE_IN] = 0,
644 .R[PSC_VOLTAGE_IN] = -2,
645
646 .format[PSC_CURRENT_OUT] = direct,
647 .m[PSC_CURRENT_OUT] = 95,
648 .b[PSC_CURRENT_OUT] = 5014,
649 .R[PSC_CURRENT_OUT] = -1,
650
651 .format[PSC_VOLTAGE_OUT] = linear,
652
653 .func[0] = PMBUS_HAVE_VIN |
654 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
655 PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT |
656 PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP |
657 PMBUS_HAVE_STATUS_INPUT,
658 },
659};
660
661static int max20730_probe(struct i2c_client *client)
662{
663 struct device *dev = &client->dev;
664 u8 buf[I2C_SMBUS_BLOCK_MAX + 1];
665 struct max20730_data *data;
666 enum chips chip_id;
667 int ret;
668
669 if (!i2c_check_functionality(client->adapter,
670 I2C_FUNC_SMBUS_READ_BYTE_DATA |
671 I2C_FUNC_SMBUS_READ_WORD_DATA |
672 I2C_FUNC_SMBUS_BLOCK_DATA))
673 return -ENODEV;
674
675 ret = i2c_smbus_read_block_data(client, PMBUS_MFR_ID, buf);
676 if (ret < 0) {
677 dev_err(&client->dev, "Failed to read Manufacturer ID\n");
678 return ret;
679 }
680 if (ret != 5 || strncmp(buf, "MAXIM", 5)) {
681 buf[ret] = '\0';
682 dev_err(dev, "Unsupported Manufacturer ID '%s'\n", buf);
683 return -ENODEV;
684 }
685
686
687
688
689
690
691
692
693
694
695
696 ret = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, buf);
697 if (ret < 0) {
698 dev_err(dev, "Failed to read Manufacturer Model\n");
699 return ret;
700 }
701 if (ret != 6 || strncmp(buf, "M20743", 6)) {
702 buf[ret] = '\0';
703 dev_err(dev, "Unsupported Manufacturer Model '%s'\n", buf);
704 return -ENODEV;
705 }
706
707 ret = i2c_smbus_read_block_data(client, PMBUS_MFR_REVISION, buf);
708 if (ret < 0) {
709 dev_err(dev, "Failed to read Manufacturer Revision\n");
710 return ret;
711 }
712 if (ret != 1 || buf[0] != 'F') {
713 buf[ret] = '\0';
714 dev_err(dev, "Unsupported Manufacturer Revision '%s'\n", buf);
715 return -ENODEV;
716 }
717
718 if (client->dev.of_node)
719 chip_id = (enum chips)of_device_get_match_data(dev);
720 else
721 chip_id = i2c_match_id(max20730_id, client)->driver_data;
722
723 data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
724 if (!data)
725 return -ENOMEM;
726 data->id = chip_id;
727 mutex_init(&data->lock);
728 memcpy(&data->info, &max20730_info[chip_id], sizeof(data->info));
729 if (of_property_read_u32_array(client->dev.of_node, "vout-voltage-divider",
730 data->vout_voltage_divider,
731 ARRAY_SIZE(data->vout_voltage_divider)) != 0)
732 memset(data->vout_voltage_divider, 0, sizeof(data->vout_voltage_divider));
733 if (data->vout_voltage_divider[1] < data->vout_voltage_divider[0]) {
734 dev_err(dev,
735 "The total resistance of voltage divider is less than output resistance\n");
736 return -EINVAL;
737 }
738
739 ret = i2c_smbus_read_word_data(client, MAX20730_MFR_DEVSET1);
740 if (ret < 0)
741 return ret;
742 data->mfr_devset1 = ret;
743
744 ret = pmbus_do_probe(client, &data->info);
745 if (ret < 0)
746 return ret;
747
748 ret = max20730_init_debugfs(client, data);
749 if (ret)
750 dev_warn(dev, "Failed to register debugfs: %d\n",
751 ret);
752
753 return 0;
754}
755
756static const struct i2c_device_id max20730_id[] = {
757 { "max20710", max20710 },
758 { "max20730", max20730 },
759 { "max20734", max20734 },
760 { "max20743", max20743 },
761 { },
762};
763
764MODULE_DEVICE_TABLE(i2c, max20730_id);
765
766static const struct of_device_id max20730_of_match[] = {
767 { .compatible = "maxim,max20710", .data = (void *)max20710 },
768 { .compatible = "maxim,max20730", .data = (void *)max20730 },
769 { .compatible = "maxim,max20734", .data = (void *)max20734 },
770 { .compatible = "maxim,max20743", .data = (void *)max20743 },
771 { },
772};
773
774MODULE_DEVICE_TABLE(of, max20730_of_match);
775
776static struct i2c_driver max20730_driver = {
777 .driver = {
778 .name = "max20730",
779 .of_match_table = max20730_of_match,
780 },
781 .probe_new = max20730_probe,
782 .remove = pmbus_do_remove,
783 .id_table = max20730_id,
784};
785
786module_i2c_driver(max20730_driver);
787
788MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>");
789MODULE_DESCRIPTION("PMBus driver for Maxim MAX20710 / MAX20730 / MAX20734 / MAX20743");
790MODULE_LICENSE("GPL");
791
