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1/*
2 * emc1403.c - SMSC Thermal Driver
3 *
4 * Copyright (C) 2008 Intel Corp
5 *
6 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; version 2 of the License.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License along
18 * with this program; if not, write to the Free Software Foundation, Inc.,
19 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
20 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
21 *
22 * TODO
23 * - cache alarm and critical limit registers
24 * - add emc1404 support
25 */
26
27#include <linux/module.h>
28#include <linux/init.h>
29#include <linux/slab.h>
30#include <linux/i2c.h>
31#include <linux/hwmon.h>
32#include <linux/hwmon-sysfs.h>
33#include <linux/err.h>
34#include <linux/sysfs.h>
35#include <linux/mutex.h>
36
37#define THERMAL_PID_REG 0xfd
38#define THERMAL_SMSC_ID_REG 0xfe
39#define THERMAL_REVISION_REG 0xff
40
41struct thermal_data {
42 struct device *hwmon_dev;
43 struct mutex mutex;
44 /* Cache the hyst value so we don't keep re-reading it. In theory
45 we could cache it forever as nobody else should be writing it. */
46 u8 cached_hyst;
47 unsigned long hyst_valid;
48};
49
50static ssize_t show_temp(struct device *dev,
51 struct device_attribute *attr, char *buf)
52{
53 struct i2c_client *client = to_i2c_client(dev);
54 struct sensor_device_attribute *sda = to_sensor_dev_attr(attr);
55 int retval = i2c_smbus_read_byte_data(client, sda->index);
56
57 if (retval < 0)
58 return retval;
59 return sprintf(buf, "%d000\n", retval);
60}
61
62static ssize_t show_bit(struct device *dev,
63 struct device_attribute *attr, char *buf)
64{
65 struct i2c_client *client = to_i2c_client(dev);
66 struct sensor_device_attribute_2 *sda = to_sensor_dev_attr_2(attr);
67 int retval = i2c_smbus_read_byte_data(client, sda->nr);
68
69 if (retval < 0)
70 return retval;
71 retval &= sda->index;
72 return sprintf(buf, "%d\n", retval ? 1 : 0);
73}
74
75static ssize_t store_temp(struct device *dev,
76 struct device_attribute *attr, const char *buf, size_t count)
77{
78 struct sensor_device_attribute *sda = to_sensor_dev_attr(attr);
79 struct i2c_client *client = to_i2c_client(dev);
80 unsigned long val;
81 int retval;
82
83 if (strict_strtoul(buf, 10, &val))
84 return -EINVAL;
85 retval = i2c_smbus_write_byte_data(client, sda->index,
86 DIV_ROUND_CLOSEST(val, 1000));
87 if (retval < 0)
88 return retval;
89 return count;
90}
91
92static ssize_t store_bit(struct device *dev,
93 struct device_attribute *attr, const char *buf, size_t count)
94{
95 struct i2c_client *client = to_i2c_client(dev);
96 struct thermal_data *data = i2c_get_clientdata(client);
97 struct sensor_device_attribute_2 *sda = to_sensor_dev_attr_2(attr);
98 unsigned long val;
99 int retval;
100
101 if (strict_strtoul(buf, 10, &val))
102 return -EINVAL;
103
104 mutex_lock(&data->mutex);
105 retval = i2c_smbus_read_byte_data(client, sda->nr);
106 if (retval < 0)
107 goto fail;
108
109 retval &= ~sda->index;
110 if (val)
111 retval |= sda->index;
112
113 retval = i2c_smbus_write_byte_data(client, sda->index, retval);
114 if (retval == 0)
115 retval = count;
116fail:
117 mutex_unlock(&data->mutex);
118 return retval;
119}
120
121static ssize_t show_hyst(struct device *dev,
122 struct device_attribute *attr, char *buf)
123{
124 struct i2c_client *client = to_i2c_client(dev);
125 struct thermal_data *data = i2c_get_clientdata(client);
126 struct sensor_device_attribute *sda = to_sensor_dev_attr(attr);
127 int retval;
128 int hyst;
129
130 retval = i2c_smbus_read_byte_data(client, sda->index);
131 if (retval < 0)
132 return retval;
133
134 if (time_after(jiffies, data->hyst_valid)) {
135 hyst = i2c_smbus_read_byte_data(client, 0x21);
136 if (hyst < 0)
137 return retval;
138 data->cached_hyst = hyst;
139 data->hyst_valid = jiffies + HZ;
140 }
141 return sprintf(buf, "%d000\n", retval - data->cached_hyst);
142}
143
144static ssize_t store_hyst(struct device *dev,
145 struct device_attribute *attr, const char *buf, size_t count)
146{
147 struct i2c_client *client = to_i2c_client(dev);
148 struct thermal_data *data = i2c_get_clientdata(client);
149 struct sensor_device_attribute *sda = to_sensor_dev_attr(attr);
150 int retval;
151 int hyst;
152 unsigned long val;
153
154 if (strict_strtoul(buf, 10, &val))
155 return -EINVAL;
156
157 mutex_lock(&data->mutex);
158 retval = i2c_smbus_read_byte_data(client, sda->index);
159 if (retval < 0)
160 goto fail;
161
162 hyst = val - retval * 1000;
163 hyst = DIV_ROUND_CLOSEST(hyst, 1000);
164 if (hyst < 0 || hyst > 255) {
165 retval = -ERANGE;
166 goto fail;
167 }
168
169 retval = i2c_smbus_write_byte_data(client, 0x21, hyst);
170 if (retval == 0) {
171 retval = count;
172 data->cached_hyst = hyst;
173 data->hyst_valid = jiffies + HZ;
174 }
175fail:
176 mutex_unlock(&data->mutex);
177 return retval;
178}
179
180/*
181 * Sensors. We pass the actual i2c register to the methods.
182 */
183
184static SENSOR_DEVICE_ATTR(temp1_min, S_IRUGO | S_IWUSR,
185 show_temp, store_temp, 0x06);
186static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR,
187 show_temp, store_temp, 0x05);
188static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO | S_IWUSR,
189 show_temp, store_temp, 0x20);
190static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0x00);
191static SENSOR_DEVICE_ATTR_2(temp1_min_alarm, S_IRUGO,
192 show_bit, NULL, 0x36, 0x01);
193static SENSOR_DEVICE_ATTR_2(temp1_max_alarm, S_IRUGO,
194 show_bit, NULL, 0x35, 0x01);
195static SENSOR_DEVICE_ATTR_2(temp1_crit_alarm, S_IRUGO,
196 show_bit, NULL, 0x37, 0x01);
197static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IRUGO | S_IWUSR,
198 show_hyst, store_hyst, 0x20);
199
200static SENSOR_DEVICE_ATTR(temp2_min, S_IRUGO | S_IWUSR,
201 show_temp, store_temp, 0x08);
202static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO | S_IWUSR,
203 show_temp, store_temp, 0x07);
204static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO | S_IWUSR,
205 show_temp, store_temp, 0x19);
206static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 0x01);
207static SENSOR_DEVICE_ATTR_2(temp2_min_alarm, S_IRUGO,
208 show_bit, NULL, 0x36, 0x02);
209static SENSOR_DEVICE_ATTR_2(temp2_max_alarm, S_IRUGO,
210 show_bit, NULL, 0x35, 0x02);
211static SENSOR_DEVICE_ATTR_2(temp2_crit_alarm, S_IRUGO,
212 show_bit, NULL, 0x37, 0x02);
213static SENSOR_DEVICE_ATTR(temp2_crit_hyst, S_IRUGO | S_IWUSR,
214 show_hyst, store_hyst, 0x19);
215
216static SENSOR_DEVICE_ATTR(temp3_min, S_IRUGO | S_IWUSR,
217 show_temp, store_temp, 0x16);
218static SENSOR_DEVICE_ATTR(temp3_max, S_IRUGO | S_IWUSR,
219 show_temp, store_temp, 0x15);
220static SENSOR_DEVICE_ATTR(temp3_crit, S_IRUGO | S_IWUSR,
221 show_temp, store_temp, 0x1A);
222static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 0x23);
223static SENSOR_DEVICE_ATTR_2(temp3_min_alarm, S_IRUGO,
224 show_bit, NULL, 0x36, 0x04);
225static SENSOR_DEVICE_ATTR_2(temp3_max_alarm, S_IRUGO,
226 show_bit, NULL, 0x35, 0x04);
227static SENSOR_DEVICE_ATTR_2(temp3_crit_alarm, S_IRUGO,
228 show_bit, NULL, 0x37, 0x04);
229static SENSOR_DEVICE_ATTR(temp3_crit_hyst, S_IRUGO | S_IWUSR,
230 show_hyst, store_hyst, 0x1A);
231
232static SENSOR_DEVICE_ATTR_2(power_state, S_IRUGO | S_IWUSR,
233 show_bit, store_bit, 0x03, 0x40);
234
235static struct attribute *mid_att_thermal[] = {
236 &sensor_dev_attr_temp1_min.dev_attr.attr,
237 &sensor_dev_attr_temp1_max.dev_attr.attr,
238 &sensor_dev_attr_temp1_crit.dev_attr.attr,
239 &sensor_dev_attr_temp1_input.dev_attr.attr,
240 &sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
241 &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
242 &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
243 &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr,
244 &sensor_dev_attr_temp2_min.dev_attr.attr,
245 &sensor_dev_attr_temp2_max.dev_attr.attr,
246 &sensor_dev_attr_temp2_crit.dev_attr.attr,
247 &sensor_dev_attr_temp2_input.dev_attr.attr,
248 &sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
249 &sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
250 &sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
251 &sensor_dev_attr_temp2_crit_hyst.dev_attr.attr,
252 &sensor_dev_attr_temp3_min.dev_attr.attr,
253 &sensor_dev_attr_temp3_max.dev_attr.attr,
254 &sensor_dev_attr_temp3_crit.dev_attr.attr,
255 &sensor_dev_attr_temp3_input.dev_attr.attr,
256 &sensor_dev_attr_temp3_min_alarm.dev_attr.attr,
257 &sensor_dev_attr_temp3_max_alarm.dev_attr.attr,
258 &sensor_dev_attr_temp3_crit_alarm.dev_attr.attr,
259 &sensor_dev_attr_temp3_crit_hyst.dev_attr.attr,
260 &sensor_dev_attr_power_state.dev_attr.attr,
261 NULL
262};
263
264static const struct attribute_group m_thermal_gr = {
265 .attrs = mid_att_thermal
266};
267
268static int emc1403_detect(struct i2c_client *client,
269 struct i2c_board_info *info)
270{
271 int id;
272 /* Check if thermal chip is SMSC and EMC1403 or EMC1423 */
273
274 id = i2c_smbus_read_byte_data(client, THERMAL_SMSC_ID_REG);
275 if (id != 0x5d)
276 return -ENODEV;
277
278 id = i2c_smbus_read_byte_data(client, THERMAL_PID_REG);
279 switch (id) {
280 case 0x21:
281 strlcpy(info->type, "emc1403", I2C_NAME_SIZE);
282 break;
283 case 0x23:
284 strlcpy(info->type, "emc1423", I2C_NAME_SIZE);
285 break;
286 /* Note: 0x25 is the 1404 which is very similar and this
287 driver could be extended */
288 default:
289 return -ENODEV;
290 }
291
292 id = i2c_smbus_read_byte_data(client, THERMAL_REVISION_REG);
293 if (id != 0x01)
294 return -ENODEV;
295
296 return 0;
297}
298
299static int emc1403_probe(struct i2c_client *client,
300 const struct i2c_device_id *id)
301{
302 int res;
303 struct thermal_data *data;
304
305 data = kzalloc(sizeof(struct thermal_data), GFP_KERNEL);
306 if (data == NULL) {
307 dev_warn(&client->dev, "out of memory");
308 return -ENOMEM;
309 }
310
311 i2c_set_clientdata(client, data);
312 mutex_init(&data->mutex);
313 data->hyst_valid = jiffies - 1; /* Expired */
314
315 res = sysfs_create_group(&client->dev.kobj, &m_thermal_gr);
316 if (res) {
317 dev_warn(&client->dev, "create group failed\n");
318 goto thermal_error1;
319 }
320 data->hwmon_dev = hwmon_device_register(&client->dev);
321 if (IS_ERR(data->hwmon_dev)) {
322 res = PTR_ERR(data->hwmon_dev);
323 dev_warn(&client->dev, "register hwmon dev failed\n");
324 goto thermal_error2;
325 }
326 dev_info(&client->dev, "EMC1403 Thermal chip found\n");
327 return res;
328
329thermal_error2:
330 sysfs_remove_group(&client->dev.kobj, &m_thermal_gr);
331thermal_error1:
332 kfree(data);
333 return res;
334}
335
336static int emc1403_remove(struct i2c_client *client)
337{
338 struct thermal_data *data = i2c_get_clientdata(client);
339
340 hwmon_device_unregister(data->hwmon_dev);
341 sysfs_remove_group(&client->dev.kobj, &m_thermal_gr);
342 kfree(data);
343 return 0;
344}
345
346static const unsigned short emc1403_address_list[] = {
347 0x18, 0x29, 0x4c, 0x4d, I2C_CLIENT_END
348};
349
350static const struct i2c_device_id emc1403_idtable[] = {
351 { "emc1403", 0 },
352 { "emc1423", 0 },
353 { }
354};
355MODULE_DEVICE_TABLE(i2c, emc1403_idtable);
356
357static struct i2c_driver sensor_emc1403 = {
358 .class = I2C_CLASS_HWMON,
359 .driver = {
360 .name = "emc1403",
361 },
362 .detect = emc1403_detect,
363 .probe = emc1403_probe,
364 .remove = emc1403_remove,
365 .id_table = emc1403_idtable,
366 .address_list = emc1403_address_list,
367};
368
369static int __init sensor_emc1403_init(void)
370{
371 return i2c_add_driver(&sensor_emc1403);
372}
373
374static void __exit sensor_emc1403_exit(void)
375{
376 i2c_del_driver(&sensor_emc1403);
377}
378
379module_init(sensor_emc1403_init);
380module_exit(sensor_emc1403_exit);
381
382MODULE_AUTHOR("Kalhan Trisal <kalhan.trisal@intel.com");
383MODULE_DESCRIPTION("emc1403 Thermal Driver");
384MODULE_LICENSE("GPL v2");
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * emc1403.c - SMSC Thermal Driver
4 *
5 * Copyright (C) 2008 Intel Corp
6 *
7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
8 *
9 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
10 */
11
12#include <linux/module.h>
13#include <linux/init.h>
14#include <linux/slab.h>
15#include <linux/i2c.h>
16#include <linux/hwmon.h>
17#include <linux/hwmon-sysfs.h>
18#include <linux/err.h>
19#include <linux/sysfs.h>
20#include <linux/mutex.h>
21#include <linux/regmap.h>
22#include <linux/util_macros.h>
23
24#define THERMAL_PID_REG 0xfd
25#define THERMAL_SMSC_ID_REG 0xfe
26#define THERMAL_REVISION_REG 0xff
27
28enum emc1403_chip { emc1402, emc1403, emc1404, emc1428 };
29
30struct thermal_data {
31 enum emc1403_chip chip;
32 struct regmap *regmap;
33 struct mutex mutex;
34};
35
36static ssize_t power_state_show(struct device *dev, struct device_attribute *attr, char *buf)
37{
38 struct thermal_data *data = dev_get_drvdata(dev);
39 unsigned int val;
40 int retval;
41
42 retval = regmap_read(data->regmap, 0x03, &val);
43 if (retval < 0)
44 return retval;
45 return sprintf(buf, "%d\n", !!(val & BIT(6)));
46}
47
48static ssize_t power_state_store(struct device *dev, struct device_attribute *attr,
49 const char *buf, size_t count)
50{
51 struct thermal_data *data = dev_get_drvdata(dev);
52 unsigned long val;
53 int retval;
54
55 if (kstrtoul(buf, 10, &val))
56 return -EINVAL;
57
58 retval = regmap_update_bits(data->regmap, 0x03, BIT(6),
59 val ? BIT(6) : 0);
60 if (retval < 0)
61 return retval;
62 return count;
63}
64
65static DEVICE_ATTR_RW(power_state);
66
67static struct attribute *emc1403_attrs[] = {
68 &dev_attr_power_state.attr,
69 NULL
70};
71ATTRIBUTE_GROUPS(emc1403);
72
73static int emc1403_detect(struct i2c_client *client,
74 struct i2c_board_info *info)
75{
76 int id;
77 /* Check if thermal chip is SMSC and EMC1403 or EMC1423 */
78
79 id = i2c_smbus_read_byte_data(client, THERMAL_SMSC_ID_REG);
80 if (id != 0x5d)
81 return -ENODEV;
82
83 id = i2c_smbus_read_byte_data(client, THERMAL_PID_REG);
84 switch (id) {
85 case 0x20:
86 strscpy(info->type, "emc1402", I2C_NAME_SIZE);
87 break;
88 case 0x21:
89 strscpy(info->type, "emc1403", I2C_NAME_SIZE);
90 break;
91 case 0x22:
92 strscpy(info->type, "emc1422", I2C_NAME_SIZE);
93 break;
94 case 0x23:
95 strscpy(info->type, "emc1423", I2C_NAME_SIZE);
96 break;
97 case 0x25:
98 strscpy(info->type, "emc1404", I2C_NAME_SIZE);
99 break;
100 case 0x27:
101 strscpy(info->type, "emc1424", I2C_NAME_SIZE);
102 break;
103 case 0x29:
104 strscpy(info->type, "emc1428", I2C_NAME_SIZE);
105 break;
106 case 0x59:
107 strscpy(info->type, "emc1438", I2C_NAME_SIZE);
108 break;
109 case 0x60:
110 strscpy(info->type, "emc1442", I2C_NAME_SIZE);
111 break;
112 default:
113 return -ENODEV;
114 }
115
116 id = i2c_smbus_read_byte_data(client, THERMAL_REVISION_REG);
117 if (id < 0x01 || id > 0x04)
118 return -ENODEV;
119
120 return 0;
121}
122
123static bool emc1403_regmap_is_volatile(struct device *dev, unsigned int reg)
124{
125 switch (reg) {
126 case 0x00: /* internal diode high byte */
127 case 0x01: /* external diode 1 high byte */
128 case 0x02: /* status */
129 case 0x10: /* external diode 1 low byte */
130 case 0x1b: /* external diode fault */
131 case 0x23: /* external diode 2 high byte */
132 case 0x24: /* external diode 2 low byte */
133 case 0x29: /* internal diode low byte */
134 case 0x2a: /* externl diode 3 high byte */
135 case 0x2b: /* external diode 3 low byte */
136 case 0x35: /* high limit status */
137 case 0x36: /* low limit status */
138 case 0x37: /* therm limit status */
139 case 0x41: /* external diode 4 high byte */
140 case 0x42: /* external diode 4 low byte */
141 case 0x43: /* external diode 5 high byte */
142 case 0x44: /* external diode 5 low byte */
143 case 0x45: /* external diode 6 high byte */
144 case 0x46: /* external diode 6 low byte */
145 case 0x47: /* external diode 7 high byte */
146 case 0x48: /* external diode 7 low byte */
147 return true;
148 default:
149 return false;
150 }
151}
152
153static const struct regmap_config emc1403_regmap_config = {
154 .reg_bits = 8,
155 .val_bits = 8,
156 .cache_type = REGCACHE_MAPLE,
157 .volatile_reg = emc1403_regmap_is_volatile,
158};
159
160enum emc1403_reg_map {temp_min, temp_max, temp_crit, temp_input};
161
162static u8 ema1403_temp_map[] = {
163 [hwmon_temp_min] = temp_min,
164 [hwmon_temp_max] = temp_max,
165 [hwmon_temp_crit] = temp_crit,
166 [hwmon_temp_input] = temp_input,
167};
168
169static u8 emc1403_temp_regs[][4] = {
170 [0] = {
171 [temp_min] = 0x06,
172 [temp_max] = 0x05,
173 [temp_crit] = 0x20,
174 [temp_input] = 0x00,
175 },
176 [1] = {
177 [temp_min] = 0x08,
178 [temp_max] = 0x07,
179 [temp_crit] = 0x19,
180 [temp_input] = 0x01,
181 },
182 [2] = {
183 [temp_min] = 0x16,
184 [temp_max] = 0x15,
185 [temp_crit] = 0x1a,
186 [temp_input] = 0x23,
187 },
188 [3] = {
189 [temp_min] = 0x2d,
190 [temp_max] = 0x2c,
191 [temp_crit] = 0x30,
192 [temp_input] = 0x2a,
193 },
194 [4] = {
195 [temp_min] = 0x51,
196 [temp_max] = 0x50,
197 [temp_crit] = 0x64,
198 [temp_input] = 0x41,
199 },
200 [5] = {
201 [temp_min] = 0x55,
202 [temp_max] = 0x54,
203 [temp_crit] = 0x65,
204 [temp_input] = 0x43
205 },
206 [6] = {
207 [temp_min] = 0x59,
208 [temp_max] = 0x58,
209 [temp_crit] = 0x66,
210 [temp_input] = 0x45,
211 },
212 [7] = {
213 [temp_min] = 0x5d,
214 [temp_max] = 0x5c,
215 [temp_crit] = 0x67,
216 [temp_input] = 0x47,
217 },
218};
219
220static s8 emc1403_temp_regs_low[][4] = {
221 [0] = {
222 [temp_min] = -1,
223 [temp_max] = -1,
224 [temp_crit] = -1,
225 [temp_input] = 0x29,
226 },
227 [1] = {
228 [temp_min] = 0x14,
229 [temp_max] = 0x13,
230 [temp_crit] = -1,
231 [temp_input] = 0x10,
232 },
233 [2] = {
234 [temp_min] = 0x18,
235 [temp_max] = 0x17,
236 [temp_crit] = -1,
237 [temp_input] = 0x24,
238 },
239 [3] = {
240 [temp_min] = 0x2f,
241 [temp_max] = 0x2e,
242 [temp_crit] = -1,
243 [temp_input] = 0x2b,
244 },
245 [4] = {
246 [temp_min] = 0x53,
247 [temp_max] = 0x52,
248 [temp_crit] = -1,
249 [temp_input] = 0x42,
250 },
251 [5] = {
252 [temp_min] = 0x57,
253 [temp_max] = 0x56,
254 [temp_crit] = -1,
255 [temp_input] = 0x44,
256 },
257 [6] = {
258 [temp_min] = 0x5b,
259 [temp_max] = 0x5a,
260 [temp_crit] = -1,
261 [temp_input] = 0x46,
262 },
263 [7] = {
264 [temp_min] = 0x5f,
265 [temp_max] = 0x5e,
266 [temp_crit] = -1,
267 [temp_input] = 0x48,
268 },
269};
270
271static int __emc1403_get_temp(struct thermal_data *data, int channel,
272 enum emc1403_reg_map map, long *val)
273{
274 unsigned int regvalh;
275 unsigned int regvall = 0;
276 int ret;
277 s8 reg;
278
279 ret = regmap_read(data->regmap, emc1403_temp_regs[channel][map], ®valh);
280 if (ret < 0)
281 return ret;
282
283 reg = emc1403_temp_regs_low[channel][map];
284 if (reg >= 0) {
285 ret = regmap_read(data->regmap, reg, ®vall);
286 if (ret < 0)
287 return ret;
288 }
289
290 if (data->chip == emc1428)
291 *val = sign_extend32((regvalh << 3) | (regvall >> 5), 10) * 125;
292 else
293 *val = ((regvalh << 3) | (regvall >> 5)) * 125;
294
295 return 0;
296}
297
298static int emc1403_get_temp(struct thermal_data *data, int channel,
299 enum emc1403_reg_map map, long *val)
300{
301 int ret;
302
303 mutex_lock(&data->mutex);
304 ret = __emc1403_get_temp(data, channel, map, val);
305 mutex_unlock(&data->mutex);
306
307 return ret;
308}
309
310static int emc1403_get_hyst(struct thermal_data *data, int channel,
311 enum emc1403_reg_map map, long *val)
312{
313 int hyst, ret;
314 long limit;
315
316 mutex_lock(&data->mutex);
317 ret = __emc1403_get_temp(data, channel, map, &limit);
318 if (ret < 0)
319 goto unlock;
320 ret = regmap_read(data->regmap, 0x21, &hyst);
321 if (ret < 0)
322 goto unlock;
323 if (map == temp_min)
324 *val = limit + hyst * 1000;
325 else
326 *val = limit - hyst * 1000;
327unlock:
328 mutex_unlock(&data->mutex);
329 return ret;
330}
331
332static int emc1403_temp_read(struct thermal_data *data, u32 attr, int channel, long *val)
333{
334 unsigned int regval;
335 int ret;
336
337 switch (attr) {
338 case hwmon_temp_min:
339 case hwmon_temp_max:
340 case hwmon_temp_crit:
341 case hwmon_temp_input:
342 ret = emc1403_get_temp(data, channel, ema1403_temp_map[attr], val);
343 break;
344 case hwmon_temp_min_hyst:
345 ret = emc1403_get_hyst(data, channel, temp_min, val);
346 break;
347 case hwmon_temp_max_hyst:
348 ret = emc1403_get_hyst(data, channel, temp_max, val);
349 break;
350 case hwmon_temp_crit_hyst:
351 ret = emc1403_get_hyst(data, channel, temp_crit, val);
352 break;
353 case hwmon_temp_min_alarm:
354 if (data->chip == emc1402) {
355 ret = regmap_read(data->regmap, 0x02, ®val);
356 if (ret < 0)
357 break;
358 *val = !!(regval & BIT(5 - 2 * channel));
359 } else {
360 ret = regmap_read(data->regmap, 0x36, ®val);
361 if (ret < 0)
362 break;
363 *val = !!(regval & BIT(channel));
364 }
365 break;
366 case hwmon_temp_max_alarm:
367 if (data->chip == emc1402) {
368 ret = regmap_read(data->regmap, 0x02, ®val);
369 if (ret < 0)
370 break;
371 *val = !!(regval & BIT(6 - 2 * channel));
372 } else {
373 ret = regmap_read(data->regmap, 0x35, ®val);
374 if (ret < 0)
375 break;
376 *val = !!(regval & BIT(channel));
377 }
378 break;
379 case hwmon_temp_crit_alarm:
380 if (data->chip == emc1402) {
381 ret = regmap_read(data->regmap, 0x02, ®val);
382 if (ret < 0)
383 break;
384 *val = !!(regval & BIT(channel));
385 } else {
386 ret = regmap_read(data->regmap, 0x37, ®val);
387 if (ret < 0)
388 break;
389 *val = !!(regval & BIT(channel));
390 }
391 break;
392 case hwmon_temp_fault:
393 ret = regmap_read(data->regmap, 0x1b, ®val);
394 if (ret < 0)
395 break;
396 *val = !!(regval & BIT(channel));
397 break;
398 default:
399 return -EOPNOTSUPP;
400 }
401 return ret;
402}
403
404static int emc1403_get_convrate(struct thermal_data *data, long *val)
405{
406 unsigned int convrate;
407 int ret;
408
409 ret = regmap_read(data->regmap, 0x04, &convrate);
410 if (ret < 0)
411 return ret;
412 if (convrate > 10)
413 convrate = 4;
414
415 *val = 16000 >> convrate;
416 return 0;
417}
418
419static int emc1403_chip_read(struct thermal_data *data, u32 attr, long *val)
420{
421 switch (attr) {
422 case hwmon_chip_update_interval:
423 return emc1403_get_convrate(data, val);
424 default:
425 return -EOPNOTSUPP;
426 }
427}
428
429static int emc1403_read(struct device *dev, enum hwmon_sensor_types type,
430 u32 attr, int channel, long *val)
431{
432 struct thermal_data *data = dev_get_drvdata(dev);
433
434 switch (type) {
435 case hwmon_temp:
436 return emc1403_temp_read(data, attr, channel, val);
437 case hwmon_chip:
438 return emc1403_chip_read(data, attr, val);
439 default:
440 return -EOPNOTSUPP;
441 }
442}
443
444static int emc1403_set_hyst(struct thermal_data *data, long val)
445{
446 int hyst, ret;
447 long limit;
448
449 if (data->chip == emc1428)
450 val = clamp_val(val, -128000, 127000);
451 else
452 val = clamp_val(val, 0, 255000);
453
454 mutex_lock(&data->mutex);
455 ret = __emc1403_get_temp(data, 0, temp_crit, &limit);
456 if (ret < 0)
457 goto unlock;
458
459 hyst = limit - val;
460 if (data->chip == emc1428)
461 hyst = clamp_val(DIV_ROUND_CLOSEST(hyst, 1000), 0, 127);
462 else
463 hyst = clamp_val(DIV_ROUND_CLOSEST(hyst, 1000), 0, 255);
464 ret = regmap_write(data->regmap, 0x21, hyst);
465unlock:
466 mutex_unlock(&data->mutex);
467 return ret;
468}
469
470static int emc1403_set_temp(struct thermal_data *data, int channel,
471 enum emc1403_reg_map map, long val)
472{
473 unsigned int regval;
474 int ret;
475 u8 regh;
476 s8 regl;
477
478 regh = emc1403_temp_regs[channel][map];
479 regl = emc1403_temp_regs_low[channel][map];
480
481 mutex_lock(&data->mutex);
482 if (regl >= 0) {
483 if (data->chip == emc1428)
484 val = clamp_val(val, -128000, 127875);
485 else
486 val = clamp_val(val, 0, 255875);
487 regval = DIV_ROUND_CLOSEST(val, 125);
488 ret = regmap_write(data->regmap, regh, (regval >> 3) & 0xff);
489 if (ret < 0)
490 goto unlock;
491 ret = regmap_write(data->regmap, regl, (regval & 0x07) << 5);
492 } else {
493 if (data->chip == emc1428)
494 val = clamp_val(val, -128000, 127000);
495 else
496 val = clamp_val(val, 0, 255000);
497 regval = DIV_ROUND_CLOSEST(val, 1000);
498 ret = regmap_write(data->regmap, regh, regval);
499 }
500unlock:
501 mutex_unlock(&data->mutex);
502 return ret;
503}
504
505static int emc1403_temp_write(struct thermal_data *data, u32 attr, int channel, long val)
506{
507 switch (attr) {
508 case hwmon_temp_min:
509 case hwmon_temp_max:
510 case hwmon_temp_crit:
511 return emc1403_set_temp(data, channel, ema1403_temp_map[attr], val);
512 case hwmon_temp_crit_hyst:
513 return emc1403_set_hyst(data, val);
514 default:
515 return -EOPNOTSUPP;
516 }
517}
518
519/* Lookup table for temperature conversion times in msec */
520static const u16 ina3221_conv_time[] = {
521 16000, 8000, 4000, 2000, 1000, 500, 250, 125, 62, 31, 16
522};
523
524static int emc1403_set_convrate(struct thermal_data *data, unsigned int interval)
525{
526 int convrate;
527
528 convrate = find_closest_descending(interval, ina3221_conv_time,
529 ARRAY_SIZE(ina3221_conv_time));
530 return regmap_write(data->regmap, 0x04, convrate);
531}
532
533static int emc1403_chip_write(struct thermal_data *data, u32 attr, long val)
534{
535 switch (attr) {
536 case hwmon_chip_update_interval:
537 return emc1403_set_convrate(data, clamp_val(val, 0, 100000));
538 default:
539 return -EOPNOTSUPP;
540 }
541}
542
543static int emc1403_write(struct device *dev, enum hwmon_sensor_types type,
544 u32 attr, int channel, long val)
545{
546 struct thermal_data *data = dev_get_drvdata(dev);
547
548 switch (type) {
549 case hwmon_temp:
550 return emc1403_temp_write(data, attr, channel, val);
551 case hwmon_chip:
552 return emc1403_chip_write(data, attr, val);
553 default:
554 return -EOPNOTSUPP;
555 }
556}
557
558static umode_t emc1403_temp_is_visible(const void *_data, u32 attr, int channel)
559{
560 const struct thermal_data *data = _data;
561
562 if (data->chip == emc1402 && channel > 1)
563 return 0;
564 if (data->chip == emc1403 && channel > 2)
565 return 0;
566 if (data->chip != emc1428 && channel > 3)
567 return 0;
568
569 switch (attr) {
570 case hwmon_temp_input:
571 case hwmon_temp_min_alarm:
572 case hwmon_temp_max_alarm:
573 case hwmon_temp_crit_alarm:
574 case hwmon_temp_fault:
575 case hwmon_temp_min_hyst:
576 case hwmon_temp_max_hyst:
577 return 0444;
578 case hwmon_temp_min:
579 case hwmon_temp_max:
580 case hwmon_temp_crit:
581 return 0644;
582 case hwmon_temp_crit_hyst:
583 if (channel == 0)
584 return 0644;
585 return 0444;
586 default:
587 return 0;
588 }
589}
590
591static umode_t emc1403_chip_is_visible(const void *_data, u32 attr)
592{
593 switch (attr) {
594 case hwmon_chip_update_interval:
595 return 0644;
596 default:
597 return 0;
598 }
599}
600
601static umode_t emc1403_is_visible(const void *data, enum hwmon_sensor_types type,
602 u32 attr, int channel)
603{
604 switch (type) {
605 case hwmon_temp:
606 return emc1403_temp_is_visible(data, attr, channel);
607 case hwmon_chip:
608 return emc1403_chip_is_visible(data, attr);
609 default:
610 return 0;
611 }
612}
613
614static const struct hwmon_channel_info * const emc1403_info[] = {
615 HWMON_CHANNEL_INFO(chip, HWMON_C_UPDATE_INTERVAL),
616 HWMON_CHANNEL_INFO(temp,
617 HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX |
618 HWMON_T_CRIT | HWMON_T_MIN_HYST | HWMON_T_MAX_HYST |
619 HWMON_T_CRIT_HYST | HWMON_T_MIN_ALARM |
620 HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM,
621 HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX |
622 HWMON_T_CRIT | HWMON_T_MIN_HYST | HWMON_T_MAX_HYST |
623 HWMON_T_CRIT_HYST | HWMON_T_MIN_ALARM |
624 HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM | HWMON_T_FAULT,
625 HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX |
626 HWMON_T_CRIT | HWMON_T_MIN_HYST | HWMON_T_MAX_HYST |
627 HWMON_T_CRIT_HYST | HWMON_T_MIN_ALARM |
628 HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM | HWMON_T_FAULT,
629 HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX |
630 HWMON_T_CRIT | HWMON_T_MIN_HYST | HWMON_T_MAX_HYST |
631 HWMON_T_CRIT_HYST | HWMON_T_MIN_ALARM |
632 HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM | HWMON_T_FAULT,
633 HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX |
634 HWMON_T_CRIT | HWMON_T_MIN_HYST | HWMON_T_MAX_HYST |
635 HWMON_T_CRIT_HYST | HWMON_T_MIN_ALARM |
636 HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM | HWMON_T_FAULT,
637 HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX |
638 HWMON_T_CRIT | HWMON_T_MIN_HYST | HWMON_T_MAX_HYST |
639 HWMON_T_CRIT_HYST | HWMON_T_MIN_ALARM |
640 HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM | HWMON_T_FAULT,
641 HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX |
642 HWMON_T_CRIT | HWMON_T_MIN_HYST | HWMON_T_MAX_HYST |
643 HWMON_T_CRIT_HYST | HWMON_T_MIN_ALARM |
644 HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM | HWMON_T_FAULT,
645 HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MAX |
646 HWMON_T_CRIT | HWMON_T_MIN_HYST | HWMON_T_MAX_HYST |
647 HWMON_T_CRIT_HYST | HWMON_T_MIN_ALARM |
648 HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM | HWMON_T_FAULT
649 ),
650 NULL
651};
652
653static const struct hwmon_ops emc1403_hwmon_ops = {
654 .is_visible = emc1403_is_visible,
655 .read = emc1403_read,
656 .write = emc1403_write,
657};
658
659static const struct hwmon_chip_info emc1403_chip_info = {
660 .ops = &emc1403_hwmon_ops,
661 .info = emc1403_info,
662};
663
664/* Last digit of chip name indicates number of channels */
665static const struct i2c_device_id emc1403_idtable[] = {
666 { "emc1402", emc1402 },
667 { "emc1403", emc1403 },
668 { "emc1404", emc1404 },
669 { "emc1412", emc1402 },
670 { "emc1413", emc1403 },
671 { "emc1414", emc1404 },
672 { "emc1422", emc1402 },
673 { "emc1423", emc1403 },
674 { "emc1424", emc1404 },
675 { "emc1428", emc1428 },
676 { "emc1438", emc1428 },
677 { "emc1442", emc1402 },
678 { }
679};
680MODULE_DEVICE_TABLE(i2c, emc1403_idtable);
681
682static int emc1403_probe(struct i2c_client *client)
683{
684 struct thermal_data *data;
685 struct device *hwmon_dev;
686 const struct i2c_device_id *id = i2c_match_id(emc1403_idtable, client);
687
688 data = devm_kzalloc(&client->dev, sizeof(struct thermal_data),
689 GFP_KERNEL);
690 if (!data)
691 return -ENOMEM;
692
693 data->chip = id->driver_data;
694 data->regmap = devm_regmap_init_i2c(client, &emc1403_regmap_config);
695 if (IS_ERR(data->regmap))
696 return PTR_ERR(data->regmap);
697
698 mutex_init(&data->mutex);
699
700 hwmon_dev = devm_hwmon_device_register_with_info(&client->dev,
701 client->name, data,
702 &emc1403_chip_info,
703 emc1403_groups);
704 return PTR_ERR_OR_ZERO(hwmon_dev);
705}
706
707static const unsigned short emc1403_address_list[] = {
708 0x18, 0x1c, 0x29, 0x3c, 0x4c, 0x4d, 0x5c, I2C_CLIENT_END
709};
710
711static struct i2c_driver sensor_emc1403 = {
712 .class = I2C_CLASS_HWMON,
713 .driver = {
714 .name = "emc1403",
715 },
716 .detect = emc1403_detect,
717 .probe = emc1403_probe,
718 .id_table = emc1403_idtable,
719 .address_list = emc1403_address_list,
720};
721
722module_i2c_driver(sensor_emc1403);
723
724MODULE_AUTHOR("Kalhan Trisal <kalhan.trisal@intel.com");
725MODULE_DESCRIPTION("emc1403 Thermal Driver");
726MODULE_LICENSE("GPL v2");