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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_CONTROL 0xd3
31#define ADM1275_PMON_CONFIG 0xd4
32
33#define ADM1275_CONVERT_EN BIT(0)
34
35#define ADM1275_VIN_VOUT_SELECT BIT(6)
36#define ADM1275_VRANGE BIT(5)
37#define ADM1075_IRANGE_50 BIT(4)
38#define ADM1075_IRANGE_25 BIT(3)
39#define ADM1075_IRANGE_MASK (BIT(3) | BIT(4))
40
41#define ADM1272_IRANGE BIT(0)
42
43#define ADM1278_TSFILT BIT(15)
44#define ADM1278_TEMP1_EN BIT(3)
45#define ADM1278_VIN_EN BIT(2)
46#define ADM1278_VOUT_EN BIT(1)
47
48#define ADM1278_PMON_DEFCONFIG (ADM1278_VOUT_EN | ADM1278_TEMP1_EN | ADM1278_TSFILT)
49
50#define ADM1293_IRANGE_25 0
51#define ADM1293_IRANGE_50 BIT(6)
52#define ADM1293_IRANGE_100 BIT(7)
53#define ADM1293_IRANGE_200 (BIT(6) | BIT(7))
54#define ADM1293_IRANGE_MASK (BIT(6) | BIT(7))
55
56#define ADM1293_VIN_SEL_012 BIT(2)
57#define ADM1293_VIN_SEL_074 BIT(3)
58#define ADM1293_VIN_SEL_210 (BIT(2) | BIT(3))
59#define ADM1293_VIN_SEL_MASK (BIT(2) | BIT(3))
60
61#define ADM1293_VAUX_EN BIT(1)
62
63#define ADM1278_PEAK_TEMP 0xd7
64#define ADM1275_IOUT_WARN2_LIMIT 0xd7
65#define ADM1275_DEVICE_CONFIG 0xd8
66
67#define ADM1275_IOUT_WARN2_SELECT BIT(4)
68
69#define ADM1276_PEAK_PIN 0xda
70#define ADM1075_READ_VAUX 0xdd
71#define ADM1075_VAUX_OV_WARN_LIMIT 0xde
72#define ADM1075_VAUX_UV_WARN_LIMIT 0xdf
73#define ADM1293_IOUT_MIN 0xe3
74#define ADM1293_PIN_MIN 0xe4
75#define ADM1075_VAUX_STATUS 0xf6
76
77#define ADM1075_VAUX_OV_WARN BIT(7)
78#define ADM1075_VAUX_UV_WARN BIT(6)
79
80#define ADM1275_VI_AVG_SHIFT 0
81#define ADM1275_VI_AVG_MASK GENMASK(ADM1275_VI_AVG_SHIFT + 2, \
82 ADM1275_VI_AVG_SHIFT)
83#define ADM1275_SAMPLES_AVG_MAX 128
84
85#define ADM1278_PWR_AVG_SHIFT 11
86#define ADM1278_PWR_AVG_MASK GENMASK(ADM1278_PWR_AVG_SHIFT + 2, \
87 ADM1278_PWR_AVG_SHIFT)
88#define ADM1278_VI_AVG_SHIFT 8
89#define ADM1278_VI_AVG_MASK GENMASK(ADM1278_VI_AVG_SHIFT + 2, \
90 ADM1278_VI_AVG_SHIFT)
91
92struct adm1275_data {
93 int id;
94 bool have_oc_fault;
95 bool have_uc_fault;
96 bool have_vout;
97 bool have_vaux_status;
98 bool have_mfr_vaux_status;
99 bool have_iout_min;
100 bool have_pin_min;
101 bool have_pin_max;
102 bool have_temp_max;
103 bool have_power_sampling;
104 struct pmbus_driver_info info;
105};
106
107#define to_adm1275_data(x) container_of(x, struct adm1275_data, info)
108
109struct coefficients {
110 s16 m;
111 s16 b;
112 s16 R;
113};
114
115static const struct coefficients adm1075_coefficients[] = {
116 [0] = { 27169, 0, -1 }, /* voltage */
117 [1] = { 806, 20475, -1 }, /* current, irange25 */
118 [2] = { 404, 20475, -1 }, /* current, irange50 */
119 [3] = { 8549, 0, -1 }, /* power, irange25 */
120 [4] = { 4279, 0, -1 }, /* power, irange50 */
121};
122
123static const struct coefficients adm1272_coefficients[] = {
124 [0] = { 6770, 0, -2 }, /* voltage, vrange 60V */
125 [1] = { 4062, 0, -2 }, /* voltage, vrange 100V */
126 [2] = { 1326, 20480, -1 }, /* current, vsense range 15mV */
127 [3] = { 663, 20480, -1 }, /* current, vsense range 30mV */
128 [4] = { 3512, 0, -2 }, /* power, vrange 60V, irange 15mV */
129 [5] = { 21071, 0, -3 }, /* power, vrange 100V, irange 15mV */
130 [6] = { 17561, 0, -3 }, /* power, vrange 60V, irange 30mV */
131 [7] = { 10535, 0, -3 }, /* power, vrange 100V, irange 30mV */
132 [8] = { 42, 31871, -1 }, /* temperature */
133
134};
135
136static const struct coefficients adm1275_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};
141
142static const struct coefficients adm1276_coefficients[] = {
143 [0] = { 19199, 0, -2 }, /* voltage, vrange set */
144 [1] = { 6720, 0, -1 }, /* voltage, vrange not set */
145 [2] = { 807, 20475, -1 }, /* current */
146 [3] = { 6043, 0, -2 }, /* power, vrange set */
147 [4] = { 2115, 0, -1 }, /* power, vrange not set */
148};
149
150static const struct coefficients adm1278_coefficients[] = {
151 [0] = { 19599, 0, -2 }, /* voltage */
152 [1] = { 800, 20475, -1 }, /* current */
153 [2] = { 6123, 0, -2 }, /* power */
154 [3] = { 42, 31880, -1 }, /* temperature */
155};
156
157static const struct coefficients adm1293_coefficients[] = {
158 [0] = { 3333, -1, 0 }, /* voltage, vrange 1.2V */
159 [1] = { 5552, -5, -1 }, /* voltage, vrange 7.4V */
160 [2] = { 19604, -50, -2 }, /* voltage, vrange 21V */
161 [3] = { 8000, -100, -2 }, /* current, irange25 */
162 [4] = { 4000, -100, -2 }, /* current, irange50 */
163 [5] = { 20000, -1000, -3 }, /* current, irange100 */
164 [6] = { 10000, -1000, -3 }, /* current, irange200 */
165 [7] = { 10417, 0, -1 }, /* power, 1.2V, irange25 */
166 [8] = { 5208, 0, -1 }, /* power, 1.2V, irange50 */
167 [9] = { 26042, 0, -2 }, /* power, 1.2V, irange100 */
168 [10] = { 13021, 0, -2 }, /* power, 1.2V, irange200 */
169 [11] = { 17351, 0, -2 }, /* power, 7.4V, irange25 */
170 [12] = { 8676, 0, -2 }, /* power, 7.4V, irange50 */
171 [13] = { 4338, 0, -2 }, /* power, 7.4V, irange100 */
172 [14] = { 21689, 0, -3 }, /* power, 7.4V, irange200 */
173 [15] = { 6126, 0, -2 }, /* power, 21V, irange25 */
174 [16] = { 30631, 0, -3 }, /* power, 21V, irange50 */
175 [17] = { 15316, 0, -3 }, /* power, 21V, irange100 */
176 [18] = { 7658, 0, -3 }, /* power, 21V, irange200 */
177};
178
179static int adm1275_read_samples(const struct adm1275_data *data,
180 struct i2c_client *client, bool is_power)
181{
182 int shift, ret;
183 u16 mask;
184
185 /*
186 * The PMON configuration register is a 16-bit register only on chips
187 * supporting power average sampling. On other chips it is an 8-bit
188 * register.
189 */
190 if (data->have_power_sampling) {
191 ret = i2c_smbus_read_word_data(client, ADM1275_PMON_CONFIG);
192 mask = is_power ? ADM1278_PWR_AVG_MASK : ADM1278_VI_AVG_MASK;
193 shift = is_power ? ADM1278_PWR_AVG_SHIFT : ADM1278_VI_AVG_SHIFT;
194 } else {
195 ret = i2c_smbus_read_byte_data(client, ADM1275_PMON_CONFIG);
196 mask = ADM1275_VI_AVG_MASK;
197 shift = ADM1275_VI_AVG_SHIFT;
198 }
199 if (ret < 0)
200 return ret;
201
202 return (ret & mask) >> shift;
203}
204
205static int adm1275_write_pmon_config(const struct adm1275_data *data,
206 struct i2c_client *client, u16 word)
207{
208 int ret, ret2;
209
210 ret = i2c_smbus_write_byte_data(client, ADM1275_PMON_CONTROL, 0);
211 if (ret)
212 return ret;
213
214 if (data->have_power_sampling)
215 ret = i2c_smbus_write_word_data(client, ADM1275_PMON_CONFIG,
216 word);
217 else
218 ret = i2c_smbus_write_byte_data(client, ADM1275_PMON_CONFIG,
219 word);
220
221 /*
222 * We still want to re-enable conversions if writing into
223 * ADM1275_PMON_CONFIG failed.
224 */
225 ret2 = i2c_smbus_write_byte_data(client, ADM1275_PMON_CONTROL,
226 ADM1275_CONVERT_EN);
227 if (!ret)
228 ret = ret2;
229
230 return ret;
231}
232
233static int adm1275_write_samples(const struct adm1275_data *data,
234 struct i2c_client *client,
235 bool is_power, u16 word)
236{
237 int shift, ret;
238 u16 mask;
239
240 if (data->have_power_sampling) {
241 ret = i2c_smbus_read_word_data(client, ADM1275_PMON_CONFIG);
242 mask = is_power ? ADM1278_PWR_AVG_MASK : ADM1278_VI_AVG_MASK;
243 shift = is_power ? ADM1278_PWR_AVG_SHIFT : ADM1278_VI_AVG_SHIFT;
244 } else {
245 ret = i2c_smbus_read_byte_data(client, ADM1275_PMON_CONFIG);
246 mask = ADM1275_VI_AVG_MASK;
247 shift = ADM1275_VI_AVG_SHIFT;
248 }
249 if (ret < 0)
250 return ret;
251
252 word = (ret & ~mask) | ((word << shift) & mask);
253
254 return adm1275_write_pmon_config(data, client, word);
255}
256
257static int adm1275_read_word_data(struct i2c_client *client, int page,
258 int phase, int reg)
259{
260 const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
261 const struct adm1275_data *data = to_adm1275_data(info);
262 int ret = 0;
263
264 if (page > 0)
265 return -ENXIO;
266
267 switch (reg) {
268 case PMBUS_IOUT_UC_FAULT_LIMIT:
269 if (!data->have_uc_fault)
270 return -ENXIO;
271 ret = pmbus_read_word_data(client, 0, 0xff,
272 ADM1275_IOUT_WARN2_LIMIT);
273 break;
274 case PMBUS_IOUT_OC_FAULT_LIMIT:
275 if (!data->have_oc_fault)
276 return -ENXIO;
277 ret = pmbus_read_word_data(client, 0, 0xff,
278 ADM1275_IOUT_WARN2_LIMIT);
279 break;
280 case PMBUS_VOUT_OV_WARN_LIMIT:
281 if (data->have_vout)
282 return -ENODATA;
283 ret = pmbus_read_word_data(client, 0, 0xff,
284 ADM1075_VAUX_OV_WARN_LIMIT);
285 break;
286 case PMBUS_VOUT_UV_WARN_LIMIT:
287 if (data->have_vout)
288 return -ENODATA;
289 ret = pmbus_read_word_data(client, 0, 0xff,
290 ADM1075_VAUX_UV_WARN_LIMIT);
291 break;
292 case PMBUS_READ_VOUT:
293 if (data->have_vout)
294 return -ENODATA;
295 ret = pmbus_read_word_data(client, 0, 0xff,
296 ADM1075_READ_VAUX);
297 break;
298 case PMBUS_VIRT_READ_IOUT_MIN:
299 if (!data->have_iout_min)
300 return -ENXIO;
301 ret = pmbus_read_word_data(client, 0, 0xff,
302 ADM1293_IOUT_MIN);
303 break;
304 case PMBUS_VIRT_READ_IOUT_MAX:
305 ret = pmbus_read_word_data(client, 0, 0xff,
306 ADM1275_PEAK_IOUT);
307 break;
308 case PMBUS_VIRT_READ_VOUT_MAX:
309 ret = pmbus_read_word_data(client, 0, 0xff,
310 ADM1275_PEAK_VOUT);
311 break;
312 case PMBUS_VIRT_READ_VIN_MAX:
313 ret = pmbus_read_word_data(client, 0, 0xff,
314 ADM1275_PEAK_VIN);
315 break;
316 case PMBUS_VIRT_READ_PIN_MIN:
317 if (!data->have_pin_min)
318 return -ENXIO;
319 ret = pmbus_read_word_data(client, 0, 0xff,
320 ADM1293_PIN_MIN);
321 break;
322 case PMBUS_VIRT_READ_PIN_MAX:
323 if (!data->have_pin_max)
324 return -ENXIO;
325 ret = pmbus_read_word_data(client, 0, 0xff,
326 ADM1276_PEAK_PIN);
327 break;
328 case PMBUS_VIRT_READ_TEMP_MAX:
329 if (!data->have_temp_max)
330 return -ENXIO;
331 ret = pmbus_read_word_data(client, 0, 0xff,
332 ADM1278_PEAK_TEMP);
333 break;
334 case PMBUS_VIRT_RESET_IOUT_HISTORY:
335 case PMBUS_VIRT_RESET_VOUT_HISTORY:
336 case PMBUS_VIRT_RESET_VIN_HISTORY:
337 break;
338 case PMBUS_VIRT_RESET_PIN_HISTORY:
339 if (!data->have_pin_max)
340 return -ENXIO;
341 break;
342 case PMBUS_VIRT_RESET_TEMP_HISTORY:
343 if (!data->have_temp_max)
344 return -ENXIO;
345 break;
346 case PMBUS_VIRT_POWER_SAMPLES:
347 if (!data->have_power_sampling)
348 return -ENXIO;
349 ret = adm1275_read_samples(data, client, true);
350 if (ret < 0)
351 break;
352 ret = BIT(ret);
353 break;
354 case PMBUS_VIRT_IN_SAMPLES:
355 case PMBUS_VIRT_CURR_SAMPLES:
356 ret = adm1275_read_samples(data, client, false);
357 if (ret < 0)
358 break;
359 ret = BIT(ret);
360 break;
361 default:
362 ret = -ENODATA;
363 break;
364 }
365 return ret;
366}
367
368static int adm1275_write_word_data(struct i2c_client *client, int page, int reg,
369 u16 word)
370{
371 const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
372 const struct adm1275_data *data = to_adm1275_data(info);
373 int ret;
374
375 if (page > 0)
376 return -ENXIO;
377
378 switch (reg) {
379 case PMBUS_IOUT_UC_FAULT_LIMIT:
380 case PMBUS_IOUT_OC_FAULT_LIMIT:
381 ret = pmbus_write_word_data(client, 0, ADM1275_IOUT_WARN2_LIMIT,
382 word);
383 break;
384 case PMBUS_VIRT_RESET_IOUT_HISTORY:
385 ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_IOUT, 0);
386 if (!ret && data->have_iout_min)
387 ret = pmbus_write_word_data(client, 0,
388 ADM1293_IOUT_MIN, 0);
389 break;
390 case PMBUS_VIRT_RESET_VOUT_HISTORY:
391 ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_VOUT, 0);
392 break;
393 case PMBUS_VIRT_RESET_VIN_HISTORY:
394 ret = pmbus_write_word_data(client, 0, ADM1275_PEAK_VIN, 0);
395 break;
396 case PMBUS_VIRT_RESET_PIN_HISTORY:
397 ret = pmbus_write_word_data(client, 0, ADM1276_PEAK_PIN, 0);
398 if (!ret && data->have_pin_min)
399 ret = pmbus_write_word_data(client, 0,
400 ADM1293_PIN_MIN, 0);
401 break;
402 case PMBUS_VIRT_RESET_TEMP_HISTORY:
403 ret = pmbus_write_word_data(client, 0, ADM1278_PEAK_TEMP, 0);
404 break;
405 case PMBUS_VIRT_POWER_SAMPLES:
406 if (!data->have_power_sampling)
407 return -ENXIO;
408 word = clamp_val(word, 1, ADM1275_SAMPLES_AVG_MAX);
409 ret = adm1275_write_samples(data, client, true, ilog2(word));
410 break;
411 case PMBUS_VIRT_IN_SAMPLES:
412 case PMBUS_VIRT_CURR_SAMPLES:
413 word = clamp_val(word, 1, ADM1275_SAMPLES_AVG_MAX);
414 ret = adm1275_write_samples(data, client, false, ilog2(word));
415 break;
416 default:
417 ret = -ENODATA;
418 break;
419 }
420 return ret;
421}
422
423static int adm1275_read_byte_data(struct i2c_client *client, int page, int reg)
424{
425 const struct pmbus_driver_info *info = pmbus_get_driver_info(client);
426 const struct adm1275_data *data = to_adm1275_data(info);
427 int mfr_status, ret;
428
429 if (page > 0)
430 return -ENXIO;
431
432 switch (reg) {
433 case PMBUS_STATUS_IOUT:
434 ret = pmbus_read_byte_data(client, page, PMBUS_STATUS_IOUT);
435 if (ret < 0)
436 break;
437 if (!data->have_oc_fault && !data->have_uc_fault)
438 break;
439 mfr_status = pmbus_read_byte_data(client, page,
440 PMBUS_STATUS_MFR_SPECIFIC);
441 if (mfr_status < 0)
442 return mfr_status;
443 if (mfr_status & ADM1275_MFR_STATUS_IOUT_WARN2) {
444 ret |= data->have_oc_fault ?
445 PB_IOUT_OC_FAULT : PB_IOUT_UC_FAULT;
446 }
447 break;
448 case PMBUS_STATUS_VOUT:
449 if (data->have_vout)
450 return -ENODATA;
451 ret = 0;
452 if (data->have_vaux_status) {
453 mfr_status = pmbus_read_byte_data(client, 0,
454 ADM1075_VAUX_STATUS);
455 if (mfr_status < 0)
456 return mfr_status;
457 if (mfr_status & ADM1075_VAUX_OV_WARN)
458 ret |= PB_VOLTAGE_OV_WARNING;
459 if (mfr_status & ADM1075_VAUX_UV_WARN)
460 ret |= PB_VOLTAGE_UV_WARNING;
461 } else if (data->have_mfr_vaux_status) {
462 mfr_status = pmbus_read_byte_data(client, page,
463 PMBUS_STATUS_MFR_SPECIFIC);
464 if (mfr_status < 0)
465 return mfr_status;
466 if (mfr_status & ADM1293_MFR_STATUS_VAUX_OV_WARN)
467 ret |= PB_VOLTAGE_OV_WARNING;
468 if (mfr_status & ADM1293_MFR_STATUS_VAUX_UV_WARN)
469 ret |= PB_VOLTAGE_UV_WARNING;
470 }
471 break;
472 default:
473 ret = -ENODATA;
474 break;
475 }
476 return ret;
477}
478
479static const struct i2c_device_id adm1275_id[] = {
480 { "adm1075", adm1075 },
481 { "adm1272", adm1272 },
482 { "adm1275", adm1275 },
483 { "adm1276", adm1276 },
484 { "adm1278", adm1278 },
485 { "adm1293", adm1293 },
486 { "adm1294", adm1294 },
487 { }
488};
489MODULE_DEVICE_TABLE(i2c, adm1275_id);
490
491/* Enable VOUT & TEMP1 if not enabled (disabled by default) */
492static int adm1275_enable_vout_temp(struct adm1275_data *data,
493 struct i2c_client *client, int config)
494{
495 int ret;
496
497 if ((config & ADM1278_PMON_DEFCONFIG) != ADM1278_PMON_DEFCONFIG) {
498 config |= ADM1278_PMON_DEFCONFIG;
499 ret = adm1275_write_pmon_config(data, client, config);
500 if (ret < 0) {
501 dev_err(&client->dev, "Failed to enable VOUT/TEMP1 monitoring\n");
502 return ret;
503 }
504 }
505 return 0;
506}
507
508static int adm1275_probe(struct i2c_client *client)
509{
510 s32 (*config_read_fn)(const struct i2c_client *client, u8 reg);
511 u8 block_buffer[I2C_SMBUS_BLOCK_MAX + 1];
512 int config, device_config;
513 int ret;
514 struct pmbus_driver_info *info;
515 struct adm1275_data *data;
516 const struct i2c_device_id *mid;
517 const struct coefficients *coefficients;
518 int vindex = -1, voindex = -1, cindex = -1, pindex = -1;
519 int tindex = -1;
520 u32 shunt;
521 u32 avg;
522
523 if (!i2c_check_functionality(client->adapter,
524 I2C_FUNC_SMBUS_READ_BYTE_DATA
525 | I2C_FUNC_SMBUS_BLOCK_DATA))
526 return -ENODEV;
527
528 ret = i2c_smbus_read_block_data(client, PMBUS_MFR_ID, block_buffer);
529 if (ret < 0) {
530 dev_err(&client->dev, "Failed to read Manufacturer ID\n");
531 return ret;
532 }
533 if (ret != 3 || strncmp(block_buffer, "ADI", 3)) {
534 dev_err(&client->dev, "Unsupported Manufacturer ID\n");
535 return -ENODEV;
536 }
537
538 ret = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, block_buffer);
539 if (ret < 0) {
540 dev_err(&client->dev, "Failed to read Manufacturer Model\n");
541 return ret;
542 }
543 for (mid = adm1275_id; mid->name[0]; mid++) {
544 if (!strncasecmp(mid->name, block_buffer, strlen(mid->name)))
545 break;
546 }
547 if (!mid->name[0]) {
548 dev_err(&client->dev, "Unsupported device\n");
549 return -ENODEV;
550 }
551
552 if (strcmp(client->name, mid->name) != 0)
553 dev_notice(&client->dev,
554 "Device mismatch: Configured %s, detected %s\n",
555 client->name, mid->name);
556
557 if (mid->driver_data == adm1272 || mid->driver_data == adm1278 ||
558 mid->driver_data == adm1293 || mid->driver_data == adm1294)
559 config_read_fn = i2c_smbus_read_word_data;
560 else
561 config_read_fn = i2c_smbus_read_byte_data;
562 config = config_read_fn(client, ADM1275_PMON_CONFIG);
563 if (config < 0)
564 return config;
565
566 device_config = config_read_fn(client, ADM1275_DEVICE_CONFIG);
567 if (device_config < 0)
568 return device_config;
569
570 data = devm_kzalloc(&client->dev, sizeof(struct adm1275_data),
571 GFP_KERNEL);
572 if (!data)
573 return -ENOMEM;
574
575 if (of_property_read_u32(client->dev.of_node,
576 "shunt-resistor-micro-ohms", &shunt))
577 shunt = 1000; /* 1 mOhm if not set via DT */
578
579 if (shunt == 0)
580 return -EINVAL;
581
582 data->id = mid->driver_data;
583
584 info = &data->info;
585
586 info->pages = 1;
587 info->format[PSC_VOLTAGE_IN] = direct;
588 info->format[PSC_VOLTAGE_OUT] = direct;
589 info->format[PSC_CURRENT_OUT] = direct;
590 info->format[PSC_POWER] = direct;
591 info->format[PSC_TEMPERATURE] = direct;
592 info->func[0] = PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT |
593 PMBUS_HAVE_SAMPLES;
594
595 info->read_word_data = adm1275_read_word_data;
596 info->read_byte_data = adm1275_read_byte_data;
597 info->write_word_data = adm1275_write_word_data;
598
599 switch (data->id) {
600 case adm1075:
601 if (device_config & ADM1275_IOUT_WARN2_SELECT)
602 data->have_oc_fault = true;
603 else
604 data->have_uc_fault = true;
605 data->have_pin_max = true;
606 data->have_vaux_status = true;
607
608 coefficients = adm1075_coefficients;
609 vindex = 0;
610 switch (config & ADM1075_IRANGE_MASK) {
611 case ADM1075_IRANGE_25:
612 cindex = 1;
613 pindex = 3;
614 break;
615 case ADM1075_IRANGE_50:
616 cindex = 2;
617 pindex = 4;
618 break;
619 default:
620 dev_err(&client->dev, "Invalid input current range");
621 break;
622 }
623
624 info->func[0] |= PMBUS_HAVE_VIN | PMBUS_HAVE_PIN
625 | PMBUS_HAVE_STATUS_INPUT;
626 if (config & ADM1275_VIN_VOUT_SELECT)
627 info->func[0] |=
628 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
629 break;
630 case adm1272:
631 data->have_vout = true;
632 data->have_pin_max = true;
633 data->have_temp_max = true;
634 data->have_power_sampling = true;
635
636 coefficients = adm1272_coefficients;
637 vindex = (config & ADM1275_VRANGE) ? 1 : 0;
638 cindex = (config & ADM1272_IRANGE) ? 3 : 2;
639 /* pindex depends on the combination of the above */
640 switch (config & (ADM1275_VRANGE | ADM1272_IRANGE)) {
641 case 0:
642 default:
643 pindex = 4;
644 break;
645 case ADM1275_VRANGE:
646 pindex = 5;
647 break;
648 case ADM1272_IRANGE:
649 pindex = 6;
650 break;
651 case ADM1275_VRANGE | ADM1272_IRANGE:
652 pindex = 7;
653 break;
654 }
655 tindex = 8;
656
657 info->func[0] |= PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT |
658 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
659 PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;
660
661 ret = adm1275_enable_vout_temp(data, client, config);
662 if (ret)
663 return ret;
664
665 if (config & ADM1278_VIN_EN)
666 info->func[0] |= PMBUS_HAVE_VIN;
667 break;
668 case adm1275:
669 if (device_config & ADM1275_IOUT_WARN2_SELECT)
670 data->have_oc_fault = true;
671 else
672 data->have_uc_fault = true;
673 data->have_vout = true;
674
675 coefficients = adm1275_coefficients;
676 vindex = (config & ADM1275_VRANGE) ? 0 : 1;
677 cindex = 2;
678
679 if (config & ADM1275_VIN_VOUT_SELECT)
680 info->func[0] |=
681 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
682 else
683 info->func[0] |=
684 PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT;
685 break;
686 case adm1276:
687 if (device_config & ADM1275_IOUT_WARN2_SELECT)
688 data->have_oc_fault = true;
689 else
690 data->have_uc_fault = true;
691 data->have_vout = true;
692 data->have_pin_max = true;
693
694 coefficients = adm1276_coefficients;
695 vindex = (config & ADM1275_VRANGE) ? 0 : 1;
696 cindex = 2;
697 pindex = (config & ADM1275_VRANGE) ? 3 : 4;
698
699 info->func[0] |= PMBUS_HAVE_VIN | PMBUS_HAVE_PIN
700 | PMBUS_HAVE_STATUS_INPUT;
701 if (config & ADM1275_VIN_VOUT_SELECT)
702 info->func[0] |=
703 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
704 break;
705 case adm1278:
706 data->have_vout = true;
707 data->have_pin_max = true;
708 data->have_temp_max = true;
709 data->have_power_sampling = true;
710
711 coefficients = adm1278_coefficients;
712 vindex = 0;
713 cindex = 1;
714 pindex = 2;
715 tindex = 3;
716
717 info->func[0] |= PMBUS_HAVE_PIN | PMBUS_HAVE_STATUS_INPUT |
718 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT |
719 PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP;
720
721 ret = adm1275_enable_vout_temp(data, client, config);
722 if (ret)
723 return ret;
724
725 if (config & ADM1278_VIN_EN)
726 info->func[0] |= PMBUS_HAVE_VIN;
727 break;
728 case adm1293:
729 case adm1294:
730 data->have_iout_min = true;
731 data->have_pin_min = true;
732 data->have_pin_max = true;
733 data->have_mfr_vaux_status = true;
734 data->have_power_sampling = true;
735
736 coefficients = adm1293_coefficients;
737
738 voindex = 0;
739 switch (config & ADM1293_VIN_SEL_MASK) {
740 case ADM1293_VIN_SEL_012: /* 1.2V */
741 vindex = 0;
742 break;
743 case ADM1293_VIN_SEL_074: /* 7.4V */
744 vindex = 1;
745 break;
746 case ADM1293_VIN_SEL_210: /* 21V */
747 vindex = 2;
748 break;
749 default: /* disabled */
750 break;
751 }
752
753 switch (config & ADM1293_IRANGE_MASK) {
754 case ADM1293_IRANGE_25:
755 cindex = 3;
756 break;
757 case ADM1293_IRANGE_50:
758 cindex = 4;
759 break;
760 case ADM1293_IRANGE_100:
761 cindex = 5;
762 break;
763 case ADM1293_IRANGE_200:
764 cindex = 6;
765 break;
766 }
767
768 if (vindex >= 0)
769 pindex = 7 + vindex * 4 + (cindex - 3);
770
771 if (config & ADM1293_VAUX_EN)
772 info->func[0] |=
773 PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT;
774
775 info->func[0] |= PMBUS_HAVE_PIN |
776 PMBUS_HAVE_VIN | PMBUS_HAVE_STATUS_INPUT;
777
778 break;
779 default:
780 dev_err(&client->dev, "Unsupported device\n");
781 return -ENODEV;
782 }
783
784 if (data->have_power_sampling &&
785 of_property_read_u32(client->dev.of_node,
786 "adi,power-sample-average", &avg) == 0) {
787 if (!avg || avg > ADM1275_SAMPLES_AVG_MAX ||
788 BIT(__fls(avg)) != avg) {
789 dev_err(&client->dev,
790 "Invalid number of power samples");
791 return -EINVAL;
792 }
793 ret = adm1275_write_samples(data, client, true, ilog2(avg));
794 if (ret < 0) {
795 dev_err(&client->dev,
796 "Setting power sample averaging failed with error %d",
797 ret);
798 return ret;
799 }
800 }
801
802 if (of_property_read_u32(client->dev.of_node,
803 "adi,volt-curr-sample-average", &avg) == 0) {
804 if (!avg || avg > ADM1275_SAMPLES_AVG_MAX ||
805 BIT(__fls(avg)) != avg) {
806 dev_err(&client->dev,
807 "Invalid number of voltage/current samples");
808 return -EINVAL;
809 }
810 ret = adm1275_write_samples(data, client, false, ilog2(avg));
811 if (ret < 0) {
812 dev_err(&client->dev,
813 "Setting voltage and current sample averaging failed with error %d",
814 ret);
815 return ret;
816 }
817 }
818
819 if (voindex < 0)
820 voindex = vindex;
821 if (vindex >= 0) {
822 info->m[PSC_VOLTAGE_IN] = coefficients[vindex].m;
823 info->b[PSC_VOLTAGE_IN] = coefficients[vindex].b;
824 info->R[PSC_VOLTAGE_IN] = coefficients[vindex].R;
825 }
826 if (voindex >= 0) {
827 info->m[PSC_VOLTAGE_OUT] = coefficients[voindex].m;
828 info->b[PSC_VOLTAGE_OUT] = coefficients[voindex].b;
829 info->R[PSC_VOLTAGE_OUT] = coefficients[voindex].R;
830 }
831 if (cindex >= 0) {
832 /* Scale current with sense resistor value */
833 info->m[PSC_CURRENT_OUT] =
834 coefficients[cindex].m * shunt / 1000;
835 info->b[PSC_CURRENT_OUT] = coefficients[cindex].b;
836 info->R[PSC_CURRENT_OUT] = coefficients[cindex].R;
837 }
838 if (pindex >= 0) {
839 info->m[PSC_POWER] =
840 coefficients[pindex].m * shunt / 1000;
841 info->b[PSC_POWER] = coefficients[pindex].b;
842 info->R[PSC_POWER] = coefficients[pindex].R;
843 }
844 if (tindex >= 0) {
845 info->m[PSC_TEMPERATURE] = coefficients[tindex].m;
846 info->b[PSC_TEMPERATURE] = coefficients[tindex].b;
847 info->R[PSC_TEMPERATURE] = coefficients[tindex].R;
848 }
849
850 return pmbus_do_probe(client, info);
851}
852
853static struct i2c_driver adm1275_driver = {
854 .driver = {
855 .name = "adm1275",
856 },
857 .probe = adm1275_probe,
858 .id_table = adm1275_id,
859};
860
861module_i2c_driver(adm1275_driver);
862
863MODULE_AUTHOR("Guenter Roeck");
864MODULE_DESCRIPTION("PMBus driver for Analog Devices ADM1275 and compatibles");
865MODULE_LICENSE("GPL");
866MODULE_IMPORT_NS(PMBUS);