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1/*
2 * Hardware monitoring driver for Analog Devices ADM1275 Hot-Swap Controller
3 * and Digital Power Monitor
4 *
5 * Copyright (c) 2011 Ericsson AB.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 */
17
18#include <linux/kernel.h>
19#include <linux/module.h>
20#include <linux/init.h>
21#include <linux/err.h>
22#include <linux/slab.h>
23#include <linux/i2c.h>
24#include "pmbus.h"
25
26#define ADM1275_PEAK_IOUT 0xd0
27#define ADM1275_PEAK_VIN 0xd1
28#define ADM1275_PEAK_VOUT 0xd2
29#define ADM1275_PMON_CONFIG 0xd4
30
31#define ADM1275_VIN_VOUT_SELECT (1 << 6)
32#define ADM1275_VRANGE (1 << 5)
33
34static int adm1275_read_word_data(struct i2c_client *client, int page, int reg)
35{
36 int ret;
37
38 if (page)
39 return -EINVAL;
40
41 switch (reg) {
42 case PMBUS_VIRT_READ_IOUT_MAX:
43 ret = pmbus_read_word_data(client, 0, ADM1275_PEAK_IOUT);
44 break;
45 case PMBUS_VIRT_READ_VOUT_MAX:
46 ret = pmbus_read_word_data(client, 0, ADM1275_PEAK_VOUT);
47 break;
48 case PMBUS_VIRT_READ_VIN_MAX:
49 ret = pmbus_read_word_data(client, 0, ADM1275_PEAK_VIN);
50 break;
51 case PMBUS_VIRT_RESET_IOUT_HISTORY:
52 case PMBUS_VIRT_RESET_VOUT_HISTORY:
53 case PMBUS_VIRT_RESET_VIN_HISTORY:
54 ret = 0;
55 break;
56 default:
57 ret = -ENODATA;
58 break;
59 }
60 return ret;
61}
62
63static int adm1275_write_word_data(struct i2c_client *client, int page, int reg,
64 u16 word)
65{
66 int ret;
67
68 if (page)
69 return -EINVAL;
70
71 switch (reg) {
72 case PMBUS_VIRT_RESET_IOUT_HISTORY:
73 ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_IOUT, 0);
74 break;
75 case PMBUS_VIRT_RESET_VOUT_HISTORY:
76 ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_VOUT, 0);
77 break;
78 case PMBUS_VIRT_RESET_VIN_HISTORY:
79 ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_VIN, 0);
80 break;
81 default:
82 ret = -ENODATA;
83 break;
84 }
85 return ret;
86}
87
88static int adm1275_probe(struct i2c_client *client,
89 const struct i2c_device_id *id)
90{
91 int config;
92 int ret;
93 struct pmbus_driver_info *info;
94
95 if (!i2c_check_functionality(client->adapter,
96 I2C_FUNC_SMBUS_READ_BYTE_DATA))
97 return -ENODEV;
98
99 info = kzalloc(sizeof(struct pmbus_driver_info), GFP_KERNEL);
100 if (!info)
101 return -ENOMEM;
102
103 config = i2c_smbus_read_byte_data(client, ADM1275_PMON_CONFIG);
104 if (config < 0) {
105 ret = config;
106 goto err_mem;
107 }
108
109 info->pages = 1;
110 info->format[PSC_VOLTAGE_IN] = direct;
111 info->format[PSC_VOLTAGE_OUT] = direct;
112 info->format[PSC_CURRENT_OUT] = direct;
113 info->m[PSC_CURRENT_OUT] = 807;
114 info->b[PSC_CURRENT_OUT] = 20475;
115 info->R[PSC_CURRENT_OUT] = -1;
116 info->func[0] = PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT;
117
118 info->read_word_data = adm1275_read_word_data;
119 info->write_word_data = adm1275_write_word_data;
120
121 if (config & ADM1275_VRANGE) {
122 info->m[PSC_VOLTAGE_IN] = 19199;
123 info->b[PSC_VOLTAGE_IN] = 0;
124 info->R[PSC_VOLTAGE_IN] = -2;
125 info->m[PSC_VOLTAGE_OUT] = 19199;
126 info->b[PSC_VOLTAGE_OUT] = 0;
127 info->R[PSC_VOLTAGE_OUT] = -2;
128 } else {
129 info->m[PSC_VOLTAGE_IN] = 6720;
130 info->b[PSC_VOLTAGE_IN] = 0;
131 info->R[PSC_VOLTAGE_IN] = -1;
132 info->m[PSC_VOLTAGE_OUT] = 6720;
133 info->b[PSC_VOLTAGE_OUT] = 0;
134 info->R[PSC_VOLTAGE_OUT] = -1;
135 }
136
137 if (config & ADM1275_VIN_VOUT_SELECT)
138 info->func[0] |= PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
139 else
140 info->func[0] |= PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT;
141
142 ret = pmbus_do_probe(client, id, info);
143 if (ret)
144 goto err_mem;
145 return 0;
146
147err_mem:
148 kfree(info);
149 return ret;
150}
151
152static int adm1275_remove(struct i2c_client *client)
153{
154 const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
155 int ret;
156
157 ret = pmbus_do_remove(client);
158 kfree(info);
159 return ret;
160}
161
162static const struct i2c_device_id adm1275_id[] = {
163 {"adm1275", 0},
164 { }
165};
166MODULE_DEVICE_TABLE(i2c, adm1275_id);
167
168static struct i2c_driver adm1275_driver = {
169 .driver = {
170 .name = "adm1275",
171 },
172 .probe = adm1275_probe,
173 .remove = adm1275_remove,
174 .id_table = adm1275_id,
175};
176
177static int __init adm1275_init(void)
178{
179 return i2c_add_driver(&adm1275_driver);
180}
181
182static void __exit adm1275_exit(void)
183{
184 i2c_del_driver(&adm1275_driver);
185}
186
187MODULE_AUTHOR("Guenter Roeck");
188MODULE_DESCRIPTION("PMBus driver for Analog Devices ADM1275");
189MODULE_LICENSE("GPL");
190module_init(adm1275_init);
191module_exit(adm1275_exit);
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Hardware monitoring driver for Analog Devices ADM1275 Hot-Swap Controller
4 * and Digital Power Monitor
5 *
6 * Copyright (c) 2011 Ericsson AB.
7 * Copyright (c) 2018 Guenter Roeck
8 */
9
10#include <linux/kernel.h>
11#include <linux/module.h>
12#include <linux/init.h>
13#include <linux/err.h>
14#include <linux/slab.h>
15#include <linux/i2c.h>
16#include <linux/bitops.h>
17#include <linux/bitfield.h>
18#include <linux/log2.h>
19#include "pmbus.h"
20
21enum chips { adm1075, adm1272, adm1275, adm1276, adm1278, adm1293, adm1294 };
22
23#define ADM1275_MFR_STATUS_IOUT_WARN2 BIT(0)
24#define ADM1293_MFR_STATUS_VAUX_UV_WARN BIT(5)
25#define ADM1293_MFR_STATUS_VAUX_OV_WARN BIT(6)
26
27#define ADM1275_PEAK_IOUT 0xd0
28#define ADM1275_PEAK_VIN 0xd1
29#define ADM1275_PEAK_VOUT 0xd2
30#define ADM1275_PMON_CONFIG 0xd4
31
32#define ADM1275_VIN_VOUT_SELECT BIT(6)
33#define ADM1275_VRANGE BIT(5)
34#define ADM1075_IRANGE_50 BIT(4)
35#define ADM1075_IRANGE_25 BIT(3)
36#define ADM1075_IRANGE_MASK (BIT(3) | BIT(4))
37
38#define ADM1272_IRANGE BIT(0)
39
40#define ADM1278_TEMP1_EN BIT(3)
41#define ADM1278_VIN_EN BIT(2)
42#define ADM1278_VOUT_EN BIT(1)
43
44#define ADM1293_IRANGE_25 0
45#define ADM1293_IRANGE_50 BIT(6)
46#define ADM1293_IRANGE_100 BIT(7)
47#define ADM1293_IRANGE_200 (BIT(6) | BIT(7))
48#define ADM1293_IRANGE_MASK (BIT(6) | BIT(7))
49
50#define ADM1293_VIN_SEL_012 BIT(2)
51#define ADM1293_VIN_SEL_074 BIT(3)
52#define ADM1293_VIN_SEL_210 (BIT(2) | BIT(3))
53#define ADM1293_VIN_SEL_MASK (BIT(2) | BIT(3))
54
55#define ADM1293_VAUX_EN BIT(1)
56
57#define ADM1278_PEAK_TEMP 0xd7
58#define ADM1275_IOUT_WARN2_LIMIT 0xd7
59#define ADM1275_DEVICE_CONFIG 0xd8
60
61#define ADM1275_IOUT_WARN2_SELECT BIT(4)
62
63#define ADM1276_PEAK_PIN 0xda
64#define ADM1075_READ_VAUX 0xdd
65#define ADM1075_VAUX_OV_WARN_LIMIT 0xde
66#define ADM1075_VAUX_UV_WARN_LIMIT 0xdf
67#define ADM1293_IOUT_MIN 0xe3
68#define ADM1293_PIN_MIN 0xe4
69#define ADM1075_VAUX_STATUS 0xf6
70
71#define ADM1075_VAUX_OV_WARN BIT(7)
72#define ADM1075_VAUX_UV_WARN BIT(6)
73
74#define ADM1275_VI_AVG_SHIFT 0
75#define ADM1275_VI_AVG_MASK GENMASK(ADM1275_VI_AVG_SHIFT + 2, \
76 ADM1275_VI_AVG_SHIFT)
77#define ADM1275_SAMPLES_AVG_MAX 128
78
79#define ADM1278_PWR_AVG_SHIFT 11
80#define ADM1278_PWR_AVG_MASK GENMASK(ADM1278_PWR_AVG_SHIFT + 2, \
81 ADM1278_PWR_AVG_SHIFT)
82#define ADM1278_VI_AVG_SHIFT 8
83#define ADM1278_VI_AVG_MASK GENMASK(ADM1278_VI_AVG_SHIFT + 2, \
84 ADM1278_VI_AVG_SHIFT)
85
86struct adm1275_data {
87 int id;
88 bool have_oc_fault;
89 bool have_uc_fault;
90 bool have_vout;
91 bool have_vaux_status;
92 bool have_mfr_vaux_status;
93 bool have_iout_min;
94 bool have_pin_min;
95 bool have_pin_max;
96 bool have_temp_max;
97 bool have_power_sampling;
98 struct pmbus_driver_info info;
99};
100
101#define to_adm1275_data(x) container_of(x, struct adm1275_data, info)
102
103struct coefficients {
104 s16 m;
105 s16 b;
106 s16 R;
107};
108
109static const struct coefficients adm1075_coefficients[] = {
110 [0] = { 27169, 0, -1 }, /* voltage */
111 [1] = { 806, 20475, -1 }, /* current, irange25 */
112 [2] = { 404, 20475, -1 }, /* current, irange50 */
113 [3] = { 8549, 0, -1 }, /* power, irange25 */
114 [4] = { 4279, 0, -1 }, /* power, irange50 */
115};
116
117static const struct coefficients adm1272_coefficients[] = {
118 [0] = { 6770, 0, -2 }, /* voltage, vrange 60V */
119 [1] = { 4062, 0, -2 }, /* voltage, vrange 100V */
120 [2] = { 1326, 20480, -1 }, /* current, vsense range 15mV */
121 [3] = { 663, 20480, -1 }, /* current, vsense range 30mV */
122 [4] = { 3512, 0, -2 }, /* power, vrange 60V, irange 15mV */
123 [5] = { 21071, 0, -3 }, /* power, vrange 100V, irange 15mV */
124 [6] = { 17561, 0, -3 }, /* power, vrange 60V, irange 30mV */
125 [7] = { 10535, 0, -3 }, /* power, vrange 100V, irange 30mV */
126 [8] = { 42, 31871, -1 }, /* temperature */
127
128};
129
130static const struct coefficients adm1275_coefficients[] = {
131 [0] = { 19199, 0, -2 }, /* voltage, vrange set */
132 [1] = { 6720, 0, -1 }, /* voltage, vrange not set */
133 [2] = { 807, 20475, -1 }, /* current */
134};
135
136static const struct coefficients adm1276_coefficients[] = {
137 [0] = { 19199, 0, -2 }, /* voltage, vrange set */
138 [1] = { 6720, 0, -1 }, /* voltage, vrange not set */
139 [2] = { 807, 20475, -1 }, /* current */
140 [3] = { 6043, 0, -2 }, /* power, vrange set */
141 [4] = { 2115, 0, -1 }, /* power, vrange not set */
142};
143
144static const struct coefficients adm1278_coefficients[] = {
145 [0] = { 19599, 0, -2 }, /* voltage */
146 [1] = { 800, 20475, -1 }, /* current */
147 [2] = { 6123, 0, -2 }, /* power */
148 [3] = { 42, 31880, -1 }, /* temperature */
149};
150
151static const struct coefficients adm1293_coefficients[] = {
152 [0] = { 3333, -1, 0 }, /* voltage, vrange 1.2V */
153 [1] = { 5552, -5, -1 }, /* voltage, vrange 7.4V */
154 [2] = { 19604, -50, -2 }, /* voltage, vrange 21V */
155 [3] = { 8000, -100, -2 }, /* current, irange25 */
156 [4] = { 4000, -100, -2 }, /* current, irange50 */
157 [5] = { 20000, -1000, -3 }, /* current, irange100 */
158 [6] = { 10000, -1000, -3 }, /* current, irange200 */
159 [7] = { 10417, 0, -1 }, /* power, 1.2V, irange25 */
160 [8] = { 5208, 0, -1 }, /* power, 1.2V, irange50 */
161 [9] = { 26042, 0, -2 }, /* power, 1.2V, irange100 */
162 [10] = { 13021, 0, -2 }, /* power, 1.2V, irange200 */
163 [11] = { 17351, 0, -2 }, /* power, 7.4V, irange25 */
164 [12] = { 8676, 0, -2 }, /* power, 7.4V, irange50 */
165 [13] = { 4338, 0, -2 }, /* power, 7.4V, irange100 */
166 [14] = { 21689, 0, -3 }, /* power, 7.4V, irange200 */
167 [15] = { 6126, 0, -2 }, /* power, 21V, irange25 */
168 [16] = { 30631, 0, -3 }, /* power, 21V, irange50 */
169 [17] = { 15316, 0, -3 }, /* power, 21V, irange100 */
170 [18] = { 7658, 0, -3 }, /* power, 21V, irange200 */
171};
172
173static int adm1275_read_pmon_config(const struct adm1275_data *data,
174 struct i2c_client *client, bool is_power)
175{
176 int shift, ret;
177 u16 mask;
178
179 /*
180 * The PMON configuration register is a 16-bit register only on chips
181 * supporting power average sampling. On other chips it is an 8-bit
182 * register.
183 */
184 if (data->have_power_sampling) {
185 ret = i2c_smbus_read_word_data(client, ADM1275_PMON_CONFIG);
186 mask = is_power ? ADM1278_PWR_AVG_MASK : ADM1278_VI_AVG_MASK;
187 shift = is_power ? ADM1278_PWR_AVG_SHIFT : ADM1278_VI_AVG_SHIFT;
188 } else {
189 ret = i2c_smbus_read_byte_data(client, ADM1275_PMON_CONFIG);
190 mask = ADM1275_VI_AVG_MASK;
191 shift = ADM1275_VI_AVG_SHIFT;
192 }
193 if (ret < 0)
194 return ret;
195
196 return (ret & mask) >> shift;
197}
198
199static int adm1275_write_pmon_config(const struct adm1275_data *data,
200 struct i2c_client *client,
201 bool is_power, u16 word)
202{
203 int shift, ret;
204 u16 mask;
205
206 if (data->have_power_sampling) {
207 ret = i2c_smbus_read_word_data(client, ADM1275_PMON_CONFIG);
208 mask = is_power ? ADM1278_PWR_AVG_MASK : ADM1278_VI_AVG_MASK;
209 shift = is_power ? ADM1278_PWR_AVG_SHIFT : ADM1278_VI_AVG_SHIFT;
210 } else {
211 ret = i2c_smbus_read_byte_data(client, ADM1275_PMON_CONFIG);
212 mask = ADM1275_VI_AVG_MASK;
213 shift = ADM1275_VI_AVG_SHIFT;
214 }
215 if (ret < 0)
216 return ret;
217
218 word = (ret & ~mask) | ((word << shift) & mask);
219 if (data->have_power_sampling)
220 ret = i2c_smbus_write_word_data(client, ADM1275_PMON_CONFIG,
221 word);
222 else
223 ret = i2c_smbus_write_byte_data(client, ADM1275_PMON_CONFIG,
224 word);
225
226 return ret;
227}
228
229static int adm1275_read_word_data(struct i2c_client *client, int page,
230 int phase, int reg)
231{
232 const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
233 const struct adm1275_data *data = to_adm1275_data(info);
234 int ret = 0;
235
236 if (page > 0)
237 return -ENXIO;
238
239 switch (reg) {
240 case PMBUS_IOUT_UC_FAULT_LIMIT:
241 if (!data->have_uc_fault)
242 return -ENXIO;
243 ret = pmbus_read_word_data(client, 0, 0xff,
244 ADM1275_IOUT_WARN2_LIMIT);
245 break;
246 case PMBUS_IOUT_OC_FAULT_LIMIT:
247 if (!data->have_oc_fault)
248 return -ENXIO;
249 ret = pmbus_read_word_data(client, 0, 0xff,
250 ADM1275_IOUT_WARN2_LIMIT);
251 break;
252 case PMBUS_VOUT_OV_WARN_LIMIT:
253 if (data->have_vout)
254 return -ENODATA;
255 ret = pmbus_read_word_data(client, 0, 0xff,
256 ADM1075_VAUX_OV_WARN_LIMIT);
257 break;
258 case PMBUS_VOUT_UV_WARN_LIMIT:
259 if (data->have_vout)
260 return -ENODATA;
261 ret = pmbus_read_word_data(client, 0, 0xff,
262 ADM1075_VAUX_UV_WARN_LIMIT);
263 break;
264 case PMBUS_READ_VOUT:
265 if (data->have_vout)
266 return -ENODATA;
267 ret = pmbus_read_word_data(client, 0, 0xff,
268 ADM1075_READ_VAUX);
269 break;
270 case PMBUS_VIRT_READ_IOUT_MIN:
271 if (!data->have_iout_min)
272 return -ENXIO;
273 ret = pmbus_read_word_data(client, 0, 0xff,
274 ADM1293_IOUT_MIN);
275 break;
276 case PMBUS_VIRT_READ_IOUT_MAX:
277 ret = pmbus_read_word_data(client, 0, 0xff,
278 ADM1275_PEAK_IOUT);
279 break;
280 case PMBUS_VIRT_READ_VOUT_MAX:
281 ret = pmbus_read_word_data(client, 0, 0xff,
282 ADM1275_PEAK_VOUT);
283 break;
284 case PMBUS_VIRT_READ_VIN_MAX:
285 ret = pmbus_read_word_data(client, 0, 0xff,
286 ADM1275_PEAK_VIN);
287 break;
288 case PMBUS_VIRT_READ_PIN_MIN:
289 if (!data->have_pin_min)
290 return -ENXIO;
291 ret = pmbus_read_word_data(client, 0, 0xff,
292 ADM1293_PIN_MIN);
293 break;
294 case PMBUS_VIRT_READ_PIN_MAX:
295 if (!data->have_pin_max)
296 return -ENXIO;
297 ret = pmbus_read_word_data(client, 0, 0xff,
298 ADM1276_PEAK_PIN);
299 break;
300 case PMBUS_VIRT_READ_TEMP_MAX:
301 if (!data->have_temp_max)
302 return -ENXIO;
303 ret = pmbus_read_word_data(client, 0, 0xff,
304 ADM1278_PEAK_TEMP);
305 break;
306 case PMBUS_VIRT_RESET_IOUT_HISTORY:
307 case PMBUS_VIRT_RESET_VOUT_HISTORY:
308 case PMBUS_VIRT_RESET_VIN_HISTORY:
309 break;
310 case PMBUS_VIRT_RESET_PIN_HISTORY:
311 if (!data->have_pin_max)
312 return -ENXIO;
313 break;
314 case PMBUS_VIRT_RESET_TEMP_HISTORY:
315 if (!data->have_temp_max)
316 return -ENXIO;
317 break;
318 case PMBUS_VIRT_POWER_SAMPLES:
319 if (!data->have_power_sampling)
320 return -ENXIO;
321 ret = adm1275_read_pmon_config(data, client, true);
322 if (ret < 0)
323 break;
324 ret = BIT(ret);
325 break;
326 case PMBUS_VIRT_IN_SAMPLES:
327 case PMBUS_VIRT_CURR_SAMPLES:
328 ret = adm1275_read_pmon_config(data, client, false);
329 if (ret < 0)
330 break;
331 ret = BIT(ret);
332 break;
333 default:
334 ret = -ENODATA;
335 break;
336 }
337 return ret;
338}
339
340static int adm1275_write_word_data(struct i2c_client *client, int page, int reg,
341 u16 word)
342{
343 const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
344 const struct adm1275_data *data = to_adm1275_data(info);
345 int ret;
346
347 if (page > 0)
348 return -ENXIO;
349
350 switch (reg) {
351 case PMBUS_IOUT_UC_FAULT_LIMIT:
352 case PMBUS_IOUT_OC_FAULT_LIMIT:
353 ret = pmbus_write_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT,
354 word);
355 break;
356 case PMBUS_VIRT_RESET_IOUT_HISTORY:
357 ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_IOUT, 0);
358 if (!ret && data->have_iout_min)
359 ret = pmbus_write_word_data(client, 0,
360 ADM1293_IOUT_MIN, 0);
361 break;
362 case PMBUS_VIRT_RESET_VOUT_HISTORY:
363 ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_VOUT, 0);
364 break;
365 case PMBUS_VIRT_RESET_VIN_HISTORY:
366 ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_VIN, 0);
367 break;
368 case PMBUS_VIRT_RESET_PIN_HISTORY:
369 ret = pmbus_write_word_data(client, 0, ADM1276_PEAK_PIN, 0);
370 if (!ret && data->have_pin_min)
371 ret = pmbus_write_word_data(client, 0,
372 ADM1293_PIN_MIN, 0);
373 break;
374 case PMBUS_VIRT_RESET_TEMP_HISTORY:
375 ret = pmbus_write_word_data(client, 0, ADM1278_PEAK_TEMP, 0);
376 break;
377 case PMBUS_VIRT_POWER_SAMPLES:
378 if (!data->have_power_sampling)
379 return -ENXIO;
380 word = clamp_val(word, 1, ADM1275_SAMPLES_AVG_MAX);
381 ret = adm1275_write_pmon_config(data, client, true,
382 ilog2(word));
383 break;
384 case PMBUS_VIRT_IN_SAMPLES:
385 case PMBUS_VIRT_CURR_SAMPLES:
386 word = clamp_val(word, 1, ADM1275_SAMPLES_AVG_MAX);
387 ret = adm1275_write_pmon_config(data, client, false,
388 ilog2(word));
389 break;
390 default:
391 ret = -ENODATA;
392 break;
393 }
394 return ret;
395}
396
397static int adm1275_read_byte_data(struct i2c_client *client, int page, int reg)
398{
399 const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
400 const struct adm1275_data *data = to_adm1275_data(info);
401 int mfr_status, ret;
402
403 if (page > 0)
404 return -ENXIO;
405
406 switch (reg) {
407 case PMBUS_STATUS_IOUT:
408 ret = pmbus_read_byte_data(client, page, PMBUS_STATUS_IOUT);
409 if (ret < 0)
410 break;
411 if (!data->have_oc_fault && !data->have_uc_fault)
412 break;
413 mfr_status = pmbus_read_byte_data(client, page,
414 PMBUS_STATUS_MFR_SPECIFIC);
415 if (mfr_status < 0)
416 return mfr_status;
417 if (mfr_status & ADM1275_MFR_STATUS_IOUT_WARN2) {
418 ret |= data->have_oc_fault ?
419 PB_IOUT_OC_FAULT : PB_IOUT_UC_FAULT;
420 }
421 break;
422 case PMBUS_STATUS_VOUT:
423 if (data->have_vout)
424 return -ENODATA;
425 ret = 0;
426 if (data->have_vaux_status) {
427 mfr_status = pmbus_read_byte_data(client, 0,
428 ADM1075_VAUX_STATUS);
429 if (mfr_status < 0)
430 return mfr_status;
431 if (mfr_status & ADM1075_VAUX_OV_WARN)
432 ret |= PB_VOLTAGE_OV_WARNING;
433 if (mfr_status & ADM1075_VAUX_UV_WARN)
434 ret |= PB_VOLTAGE_UV_WARNING;
435 } else if (data->have_mfr_vaux_status) {
436 mfr_status = pmbus_read_byte_data(client, page,
437 PMBUS_STATUS_MFR_SPECIFIC);
438 if (mfr_status < 0)
439 return mfr_status;
440 if (mfr_status & ADM1293_MFR_STATUS_VAUX_OV_WARN)
441 ret |= PB_VOLTAGE_OV_WARNING;
442 if (mfr_status & ADM1293_MFR_STATUS_VAUX_UV_WARN)
443 ret |= PB_VOLTAGE_UV_WARNING;
444 }
445 break;
446 default:
447 ret = -ENODATA;
448 break;
449 }
450 return ret;
451}
452
453static const struct i2c_device_id adm1275_id[] = {
454 { "adm1075", adm1075 },
455 { "adm1272", adm1272 },
456 { "adm1275", adm1275 },
457 { "adm1276", adm1276 },
458 { "adm1278", adm1278 },
459 { "adm1293", adm1293 },
460 { "adm1294", adm1294 },
461 { }
462};
463MODULE_DEVICE_TABLE(i2c, adm1275_id);
464
465static int adm1275_probe(struct i2c_client *client)
466{
467 s32 (*config_read_fn)(const struct i2c_client *client, u8 reg);
468 u8 block_buffer[I2C_SMBUS_BLOCK_MAX + 1];
469 int config, device_config;
470 int ret;
471 struct pmbus_driver_info *info;
472 struct adm1275_data *data;
473 const struct i2c_device_id *mid;
474 const struct coefficients *coefficients;
475 int vindex = -1, voindex = -1, cindex = -1, pindex = -1;
476 int tindex = -1;
477 u32 shunt;
478
479 if (!i2c_check_functionality(client->adapter,
480 I2C_FUNC_SMBUS_READ_BYTE_DATA
481 | I2C_FUNC_SMBUS_BLOCK_DATA))
482 return -ENODEV;
483
484 ret = i2c_smbus_read_block_data(client, PMBUS_MFR_ID, block_buffer);
485 if (ret < 0) {
486 dev_err(&client->dev, "Failed to read Manufacturer ID\n");
487 return ret;
488 }
489 if (ret != 3 || strncmp(block_buffer, "ADI", 3)) {
490 dev_err(&client->dev, "Unsupported Manufacturer ID\n");
491 return -ENODEV;
492 }
493
494 ret = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, block_buffer);
495 if (ret < 0) {
496 dev_err(&client->dev, "Failed to read Manufacturer Model\n");
497 return ret;
498 }
499 for (mid = adm1275_id; mid->name[0]; mid++) {
500 if (!strncasecmp(mid->name, block_buffer, strlen(mid->name)))
501 break;
502 }
503 if (!mid->name[0]) {
504 dev_err(&client->dev, "Unsupported device\n");
505 return -ENODEV;
506 }
507
508 if (strcmp(client->name, mid->name) != 0)
509 dev_notice(&client->dev,
510 "Device mismatch: Configured %s, detected %s\n",
511 client->name, mid->name);
512
513 if (mid->driver_data == adm1272 || mid->driver_data == adm1278 ||
514 mid->driver_data == adm1293 || mid->driver_data == adm1294)
515 config_read_fn = i2c_smbus_read_word_data;
516 else
517 config_read_fn = i2c_smbus_read_byte_data;
518 config = config_read_fn(client, ADM1275_PMON_CONFIG);
519 if (config < 0)
520 return config;
521
522 device_config = config_read_fn(client, ADM1275_DEVICE_CONFIG);
523 if (device_config < 0)
524 return device_config;
525
526 data = devm_kzalloc(&client->dev, sizeof(struct adm1275_data),
527 GFP_KERNEL);
528 if (!data)
529 return -ENOMEM;
530
531 if (of_property_read_u32(client->dev.of_node,
532 "shunt-resistor-micro-ohms", &shunt))
533 shunt = 1000; /* 1 mOhm if not set via DT */
534
535 if (shunt == 0)
536 return -EINVAL;
537
538 data->id = mid->driver_data;
539
540 info = &data->info;
541
542 info->pages = 1;
543 info->format[PSC_VOLTAGE_IN] = direct;
544 info->format[PSC_VOLTAGE_OUT] = direct;
545 info->format[PSC_CURRENT_OUT] = direct;
546 info->format[PSC_POWER] = direct;
547 info->format[PSC_TEMPERATURE] = direct;
548 info->func[0] = PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT |
549 PMBUS_HAVE_SAMPLES;
550
551 info->read_word_data = adm1275_read_word_data;
552 info->read_byte_data = adm1275_read_byte_data;
553 info->write_word_data = adm1275_write_word_data;
554
555 switch (data->id) {
556 case adm1075:
557 if (device_config & ADM1275_IOUT_WARN2_SELECT)
558 data->have_oc_fault = true;
559 else
560 data->have_uc_fault = true;
561 data->have_pin_max = true;
562 data->have_vaux_status = true;
563
564 coefficients = adm1075_coefficients;
565 vindex = 0;
566 switch (config & ADM1075_IRANGE_MASK) {
567 case ADM1075_IRANGE_25:
568 cindex = 1;
569 pindex = 3;
570 break;
571 case ADM1075_IRANGE_50:
572 cindex = 2;
573 pindex = 4;
574 break;
575 default:
576 dev_err(&client->dev, "Invalid input current range");
577 break;
578 }
579
580 info->func[0] |= PMBUS_HAVE_VIN | PMBUS_HAVE_PIN
581 | PMBUS_HAVE_STATUS_INPUT;
582 if (config & ADM1275_VIN_VOUT_SELECT)
583 info->func[0] |=
584 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
585 break;
586 case adm1272:
587 data->have_vout = true;
588 data->have_pin_max = true;
589 data->have_temp_max = true;
590 data->have_power_sampling = true;
591
592 coefficients = adm1272_coefficients;
593 vindex = (config & ADM1275_VRANGE) ? 1 : 0;
594 cindex = (config & ADM1272_IRANGE) ? 3 : 2;
595 /* pindex depends on the combination of the above */
596 switch (config & (ADM1275_VRANGE | ADM1272_IRANGE)) {
597 case 0:
598 default:
599 pindex = 4;
600 break;
601 case ADM1275_VRANGE:
602 pindex = 5;
603 break;
604 case ADM1272_IRANGE:
605 pindex = 6;
606 break;
607 case ADM1275_VRANGE | ADM1272_IRANGE:
608 pindex = 7;
609 break;
610 }
611 tindex = 8;
612
613 info->func[0] |= PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT |
614 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
615 PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;
616
617 /* Enable VOUT & TEMP1 if not enabled (disabled by default) */
618 if ((config & (ADM1278_VOUT_EN | ADM1278_TEMP1_EN)) !=
619 (ADM1278_VOUT_EN | ADM1278_TEMP1_EN)) {
620 config |= ADM1278_VOUT_EN | ADM1278_TEMP1_EN;
621 ret = i2c_smbus_write_byte_data(client,
622 ADM1275_PMON_CONFIG,
623 config);
624 if (ret < 0) {
625 dev_err(&client->dev,
626 "Failed to enable VOUT monitoring\n");
627 return -ENODEV;
628 }
629 }
630 if (config & ADM1278_VIN_EN)
631 info->func[0] |= PMBUS_HAVE_VIN;
632 break;
633 case adm1275:
634 if (device_config & ADM1275_IOUT_WARN2_SELECT)
635 data->have_oc_fault = true;
636 else
637 data->have_uc_fault = true;
638 data->have_vout = true;
639
640 coefficients = adm1275_coefficients;
641 vindex = (config & ADM1275_VRANGE) ? 0 : 1;
642 cindex = 2;
643
644 if (config & ADM1275_VIN_VOUT_SELECT)
645 info->func[0] |=
646 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
647 else
648 info->func[0] |=
649 PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT;
650 break;
651 case adm1276:
652 if (device_config & ADM1275_IOUT_WARN2_SELECT)
653 data->have_oc_fault = true;
654 else
655 data->have_uc_fault = true;
656 data->have_vout = true;
657 data->have_pin_max = true;
658
659 coefficients = adm1276_coefficients;
660 vindex = (config & ADM1275_VRANGE) ? 0 : 1;
661 cindex = 2;
662 pindex = (config & ADM1275_VRANGE) ? 3 : 4;
663
664 info->func[0] |= PMBUS_HAVE_VIN | PMBUS_HAVE_PIN
665 | PMBUS_HAVE_STATUS_INPUT;
666 if (config & ADM1275_VIN_VOUT_SELECT)
667 info->func[0] |=
668 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
669 break;
670 case adm1278:
671 data->have_vout = true;
672 data->have_pin_max = true;
673 data->have_temp_max = true;
674 data->have_power_sampling = true;
675
676 coefficients = adm1278_coefficients;
677 vindex = 0;
678 cindex = 1;
679 pindex = 2;
680 tindex = 3;
681
682 info->func[0] |= PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT |
683 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
684 PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;
685
686 /* Enable VOUT & TEMP1 if not enabled (disabled by default) */
687 if ((config & (ADM1278_VOUT_EN | ADM1278_TEMP1_EN)) !=
688 (ADM1278_VOUT_EN | ADM1278_TEMP1_EN)) {
689 config |= ADM1278_VOUT_EN | ADM1278_TEMP1_EN;
690 ret = i2c_smbus_write_byte_data(client,
691 ADM1275_PMON_CONFIG,
692 config);
693 if (ret < 0) {
694 dev_err(&client->dev,
695 "Failed to enable VOUT monitoring\n");
696 return -ENODEV;
697 }
698 }
699
700 if (config & ADM1278_VIN_EN)
701 info->func[0] |= PMBUS_HAVE_VIN;
702 break;
703 case adm1293:
704 case adm1294:
705 data->have_iout_min = true;
706 data->have_pin_min = true;
707 data->have_pin_max = true;
708 data->have_mfr_vaux_status = true;
709 data->have_power_sampling = true;
710
711 coefficients = adm1293_coefficients;
712
713 voindex = 0;
714 switch (config & ADM1293_VIN_SEL_MASK) {
715 case ADM1293_VIN_SEL_012: /* 1.2V */
716 vindex = 0;
717 break;
718 case ADM1293_VIN_SEL_074: /* 7.4V */
719 vindex = 1;
720 break;
721 case ADM1293_VIN_SEL_210: /* 21V */
722 vindex = 2;
723 break;
724 default: /* disabled */
725 break;
726 }
727
728 switch (config & ADM1293_IRANGE_MASK) {
729 case ADM1293_IRANGE_25:
730 cindex = 3;
731 break;
732 case ADM1293_IRANGE_50:
733 cindex = 4;
734 break;
735 case ADM1293_IRANGE_100:
736 cindex = 5;
737 break;
738 case ADM1293_IRANGE_200:
739 cindex = 6;
740 break;
741 }
742
743 if (vindex >= 0)
744 pindex = 7 + vindex * 4 + (cindex - 3);
745
746 if (config & ADM1293_VAUX_EN)
747 info->func[0] |=
748 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
749
750 info->func[0] |= PMBUS_HAVE_PIN |
751 PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT;
752
753 break;
754 default:
755 dev_err(&client->dev, "Unsupported device\n");
756 return -ENODEV;
757 }
758
759 if (voindex < 0)
760 voindex = vindex;
761 if (vindex >= 0) {
762 info->m[PSC_VOLTAGE_IN] = coefficients[vindex].m;
763 info->b[PSC_VOLTAGE_IN] = coefficients[vindex].b;
764 info->R[PSC_VOLTAGE_IN] = coefficients[vindex].R;
765 }
766 if (voindex >= 0) {
767 info->m[PSC_VOLTAGE_OUT] = coefficients[voindex].m;
768 info->b[PSC_VOLTAGE_OUT] = coefficients[voindex].b;
769 info->R[PSC_VOLTAGE_OUT] = coefficients[voindex].R;
770 }
771 if (cindex >= 0) {
772 /* Scale current with sense resistor value */
773 info->m[PSC_CURRENT_OUT] =
774 coefficients[cindex].m * shunt / 1000;
775 info->b[PSC_CURRENT_OUT] = coefficients[cindex].b;
776 info->R[PSC_CURRENT_OUT] = coefficients[cindex].R;
777 }
778 if (pindex >= 0) {
779 info->m[PSC_POWER] =
780 coefficients[pindex].m * shunt / 1000;
781 info->b[PSC_POWER] = coefficients[pindex].b;
782 info->R[PSC_POWER] = coefficients[pindex].R;
783 }
784 if (tindex >= 0) {
785 info->m[PSC_TEMPERATURE] = coefficients[tindex].m;
786 info->b[PSC_TEMPERATURE] = coefficients[tindex].b;
787 info->R[PSC_TEMPERATURE] = coefficients[tindex].R;
788 }
789
790 return pmbus_do_probe(client, info);
791}
792
793static struct i2c_driver adm1275_driver = {
794 .driver = {
795 .name = "adm1275",
796 },
797 .probe_new = adm1275_probe,
798 .id_table = adm1275_id,
799};
800
801module_i2c_driver(adm1275_driver);
802
803MODULE_AUTHOR("Guenter Roeck");
804MODULE_DESCRIPTION("PMBus driver for Analog Devices ADM1275 and compatibles");
805MODULE_LICENSE("GPL");
806MODULE_IMPORT_NS(PMBUS);