Commit | Line | Data |
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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
d84ca5b3 WS |
2 | /* |
3 | * Driver for the ADT7411 (I2C/SPI 8 channel 10 bit ADC & temperature-sensor) | |
4 | * | |
5 | * Copyright (C) 2008, 2010 Pengutronix | |
6 | * | |
a95da110 | 7 | * TODO: SPI, use power-down mode for suspend?, interrupt handling? |
d84ca5b3 WS |
8 | */ |
9 | ||
10 | #include <linux/kernel.h> | |
11 | #include <linux/module.h> | |
12 | #include <linux/init.h> | |
13 | #include <linux/err.h> | |
d84ca5b3 WS |
14 | #include <linux/mutex.h> |
15 | #include <linux/jiffies.h> | |
16 | #include <linux/i2c.h> | |
17 | #include <linux/hwmon.h> | |
18 | #include <linux/hwmon-sysfs.h> | |
5a0e3ad6 | 19 | #include <linux/slab.h> |
d84ca5b3 | 20 | |
9bb2d47d MW |
21 | #define ADT7411_REG_STAT_1 0x00 |
22 | #define ADT7411_STAT_1_INT_TEMP_HIGH BIT(0) | |
23 | #define ADT7411_STAT_1_INT_TEMP_LOW BIT(1) | |
24 | #define ADT7411_STAT_1_EXT_TEMP_HIGH_AIN1 BIT(2) | |
25 | #define ADT7411_STAT_1_EXT_TEMP_LOW BIT(3) | |
26 | #define ADT7411_STAT_1_EXT_TEMP_FAULT BIT(4) | |
27 | #define ADT7411_STAT_1_AIN2 BIT(5) | |
28 | #define ADT7411_STAT_1_AIN3 BIT(6) | |
29 | #define ADT7411_STAT_1_AIN4 BIT(7) | |
30 | #define ADT7411_REG_STAT_2 0x01 | |
31 | #define ADT7411_STAT_2_AIN5 BIT(0) | |
32 | #define ADT7411_STAT_2_AIN6 BIT(1) | |
33 | #define ADT7411_STAT_2_AIN7 BIT(2) | |
34 | #define ADT7411_STAT_2_AIN8 BIT(3) | |
35 | #define ADT7411_STAT_2_VDD BIT(4) | |
d84ca5b3 WS |
36 | #define ADT7411_REG_INT_TEMP_VDD_LSB 0x03 |
37 | #define ADT7411_REG_EXT_TEMP_AIN14_LSB 0x04 | |
38 | #define ADT7411_REG_VDD_MSB 0x06 | |
39 | #define ADT7411_REG_INT_TEMP_MSB 0x07 | |
40 | #define ADT7411_REG_EXT_TEMP_AIN1_MSB 0x08 | |
41 | ||
42 | #define ADT7411_REG_CFG1 0x18 | |
9bb2d47d MW |
43 | #define ADT7411_CFG1_START_MONITOR BIT(0) |
44 | #define ADT7411_CFG1_RESERVED_BIT1 BIT(1) | |
45 | #define ADT7411_CFG1_EXT_TDM BIT(2) | |
46 | #define ADT7411_CFG1_RESERVED_BIT3 BIT(3) | |
d84ca5b3 WS |
47 | |
48 | #define ADT7411_REG_CFG2 0x19 | |
9bb2d47d | 49 | #define ADT7411_CFG2_DISABLE_AVG BIT(5) |
d84ca5b3 WS |
50 | |
51 | #define ADT7411_REG_CFG3 0x1a | |
9bb2d47d MW |
52 | #define ADT7411_CFG3_ADC_CLK_225 BIT(0) |
53 | #define ADT7411_CFG3_RESERVED_BIT1 BIT(1) | |
54 | #define ADT7411_CFG3_RESERVED_BIT2 BIT(2) | |
55 | #define ADT7411_CFG3_RESERVED_BIT3 BIT(3) | |
56 | #define ADT7411_CFG3_REF_VDD BIT(4) | |
57 | ||
58 | #define ADT7411_REG_VDD_HIGH 0x23 | |
59 | #define ADT7411_REG_VDD_LOW 0x24 | |
60 | #define ADT7411_REG_TEMP_HIGH(nr) (0x25 + 2 * (nr)) | |
61 | #define ADT7411_REG_TEMP_LOW(nr) (0x26 + 2 * (nr)) | |
62 | #define ADT7411_REG_IN_HIGH(nr) ((nr) > 1 \ | |
63 | ? 0x2b + 2 * ((nr)-2) \ | |
64 | : 0x27) | |
65 | #define ADT7411_REG_IN_LOW(nr) ((nr) > 1 \ | |
66 | ? 0x2c + 2 * ((nr)-2) \ | |
67 | : 0x28) | |
d84ca5b3 WS |
68 | |
69 | #define ADT7411_REG_DEVICE_ID 0x4d | |
70 | #define ADT7411_REG_MANUFACTURER_ID 0x4e | |
71 | ||
72 | #define ADT7411_DEVICE_ID 0x2 | |
73 | #define ADT7411_MANUFACTURER_ID 0x41 | |
74 | ||
75 | static const unsigned short normal_i2c[] = { 0x48, 0x4a, 0x4b, I2C_CLIENT_END }; | |
76 | ||
9bb2d47d MW |
77 | static const u8 adt7411_in_alarm_reg[] = { |
78 | ADT7411_REG_STAT_2, | |
79 | ADT7411_REG_STAT_1, | |
80 | ADT7411_REG_STAT_1, | |
81 | ADT7411_REG_STAT_1, | |
82 | ADT7411_REG_STAT_1, | |
83 | ADT7411_REG_STAT_2, | |
84 | ADT7411_REG_STAT_2, | |
85 | ADT7411_REG_STAT_2, | |
86 | ADT7411_REG_STAT_2, | |
87 | }; | |
88 | ||
89 | static const u8 adt7411_in_alarm_bits[] = { | |
90 | ADT7411_STAT_2_VDD, | |
91 | ADT7411_STAT_1_EXT_TEMP_HIGH_AIN1, | |
92 | ADT7411_STAT_1_AIN2, | |
93 | ADT7411_STAT_1_AIN3, | |
94 | ADT7411_STAT_1_AIN4, | |
95 | ADT7411_STAT_2_AIN5, | |
96 | ADT7411_STAT_2_AIN6, | |
97 | ADT7411_STAT_2_AIN7, | |
98 | ADT7411_STAT_2_AIN8, | |
99 | }; | |
100 | ||
d84ca5b3 WS |
101 | struct adt7411_data { |
102 | struct mutex device_lock; /* for "atomic" device accesses */ | |
23244985 | 103 | struct mutex update_lock; |
d84ca5b3 | 104 | unsigned long next_update; |
1b109c49 | 105 | long vref_cached; |
eac83cd9 | 106 | struct i2c_client *client; |
a95da110 | 107 | bool use_ext_temp; |
d84ca5b3 WS |
108 | }; |
109 | ||
110 | /* | |
111 | * When reading a register containing (up to 4) lsb, all associated | |
112 | * msb-registers get locked by the hardware. After _one_ of those msb is read, | |
113 | * _all_ are unlocked. In order to use this locking correctly, reading lsb/msb | |
114 | * is protected here with a mutex, too. | |
115 | */ | |
116 | static int adt7411_read_10_bit(struct i2c_client *client, u8 lsb_reg, | |
117 | u8 msb_reg, u8 lsb_shift) | |
118 | { | |
119 | struct adt7411_data *data = i2c_get_clientdata(client); | |
120 | int val, tmp; | |
121 | ||
122 | mutex_lock(&data->device_lock); | |
123 | ||
124 | val = i2c_smbus_read_byte_data(client, lsb_reg); | |
125 | if (val < 0) | |
126 | goto exit_unlock; | |
127 | ||
128 | tmp = (val >> lsb_shift) & 3; | |
129 | val = i2c_smbus_read_byte_data(client, msb_reg); | |
130 | ||
131 | if (val >= 0) | |
132 | val = (val << 2) | tmp; | |
133 | ||
134 | exit_unlock: | |
135 | mutex_unlock(&data->device_lock); | |
136 | ||
137 | return val; | |
138 | } | |
139 | ||
140 | static int adt7411_modify_bit(struct i2c_client *client, u8 reg, u8 bit, | |
141 | bool flag) | |
142 | { | |
143 | struct adt7411_data *data = i2c_get_clientdata(client); | |
144 | int ret, val; | |
145 | ||
146 | mutex_lock(&data->device_lock); | |
147 | ||
148 | ret = i2c_smbus_read_byte_data(client, reg); | |
149 | if (ret < 0) | |
150 | goto exit_unlock; | |
151 | ||
152 | if (flag) | |
153 | val = ret | bit; | |
154 | else | |
155 | val = ret & ~bit; | |
156 | ||
157 | ret = i2c_smbus_write_byte_data(client, reg, val); | |
158 | ||
159 | exit_unlock: | |
160 | mutex_unlock(&data->device_lock); | |
161 | return ret; | |
162 | } | |
163 | ||
d84ca5b3 WS |
164 | static ssize_t adt7411_show_bit(struct device *dev, |
165 | struct device_attribute *attr, char *buf) | |
166 | { | |
167 | struct sensor_device_attribute_2 *attr2 = to_sensor_dev_attr_2(attr); | |
eac83cd9 AL |
168 | struct adt7411_data *data = dev_get_drvdata(dev); |
169 | struct i2c_client *client = data->client; | |
d84ca5b3 WS |
170 | int ret = i2c_smbus_read_byte_data(client, attr2->index); |
171 | ||
172 | return ret < 0 ? ret : sprintf(buf, "%u\n", !!(ret & attr2->nr)); | |
173 | } | |
174 | ||
175 | static ssize_t adt7411_set_bit(struct device *dev, | |
176 | struct device_attribute *attr, const char *buf, | |
177 | size_t count) | |
178 | { | |
179 | struct sensor_device_attribute_2 *s_attr2 = to_sensor_dev_attr_2(attr); | |
eac83cd9 AL |
180 | struct adt7411_data *data = dev_get_drvdata(dev); |
181 | struct i2c_client *client = data->client; | |
d84ca5b3 WS |
182 | int ret; |
183 | unsigned long flag; | |
184 | ||
179c4fdb | 185 | ret = kstrtoul(buf, 0, &flag); |
d84ca5b3 WS |
186 | if (ret || flag > 1) |
187 | return -EINVAL; | |
188 | ||
189 | ret = adt7411_modify_bit(client, s_attr2->index, s_attr2->nr, flag); | |
190 | ||
191 | /* force update */ | |
23244985 | 192 | mutex_lock(&data->update_lock); |
d84ca5b3 | 193 | data->next_update = jiffies; |
23244985 | 194 | mutex_unlock(&data->update_lock); |
d84ca5b3 WS |
195 | |
196 | return ret < 0 ? ret : count; | |
197 | } | |
198 | ||
199 | #define ADT7411_BIT_ATTR(__name, __reg, __bit) \ | |
200 | SENSOR_DEVICE_ATTR_2(__name, S_IRUGO | S_IWUSR, adt7411_show_bit, \ | |
201 | adt7411_set_bit, __bit, __reg) | |
202 | ||
d84ca5b3 WS |
203 | static ADT7411_BIT_ATTR(no_average, ADT7411_REG_CFG2, ADT7411_CFG2_DISABLE_AVG); |
204 | static ADT7411_BIT_ATTR(fast_sampling, ADT7411_REG_CFG3, ADT7411_CFG3_ADC_CLK_225); | |
205 | static ADT7411_BIT_ATTR(adc_ref_vdd, ADT7411_REG_CFG3, ADT7411_CFG3_REF_VDD); | |
206 | ||
207 | static struct attribute *adt7411_attrs[] = { | |
d84ca5b3 WS |
208 | &sensor_dev_attr_no_average.dev_attr.attr, |
209 | &sensor_dev_attr_fast_sampling.dev_attr.attr, | |
210 | &sensor_dev_attr_adc_ref_vdd.dev_attr.attr, | |
211 | NULL | |
212 | }; | |
1b109c49 | 213 | ATTRIBUTE_GROUPS(adt7411); |
d84ca5b3 | 214 | |
9bb2d47d MW |
215 | static int adt7411_read_in_alarm(struct device *dev, int channel, long *val) |
216 | { | |
217 | struct adt7411_data *data = dev_get_drvdata(dev); | |
218 | struct i2c_client *client = data->client; | |
219 | int ret; | |
220 | ||
221 | ret = i2c_smbus_read_byte_data(client, adt7411_in_alarm_reg[channel]); | |
222 | if (ret < 0) | |
223 | return ret; | |
224 | *val = !!(ret & adt7411_in_alarm_bits[channel]); | |
225 | return 0; | |
226 | } | |
227 | ||
1b109c49 | 228 | static int adt7411_read_in_vdd(struct device *dev, u32 attr, long *val) |
a95da110 | 229 | { |
a95da110 | 230 | struct adt7411_data *data = dev_get_drvdata(dev); |
1b109c49 MW |
231 | struct i2c_client *client = data->client; |
232 | int ret; | |
a95da110 | 233 | |
1b109c49 MW |
234 | switch (attr) { |
235 | case hwmon_in_input: | |
236 | ret = adt7411_read_10_bit(client, ADT7411_REG_INT_TEMP_VDD_LSB, | |
237 | ADT7411_REG_VDD_MSB, 2); | |
238 | if (ret < 0) | |
239 | return ret; | |
240 | *val = ret * 7000 / 1024; | |
241 | return 0; | |
9bb2d47d MW |
242 | case hwmon_in_min: |
243 | ret = i2c_smbus_read_byte_data(client, ADT7411_REG_VDD_LOW); | |
244 | if (ret < 0) | |
245 | return ret; | |
246 | *val = ret * 7000 / 256; | |
247 | return 0; | |
248 | case hwmon_in_max: | |
249 | ret = i2c_smbus_read_byte_data(client, ADT7411_REG_VDD_HIGH); | |
250 | if (ret < 0) | |
251 | return ret; | |
252 | *val = ret * 7000 / 256; | |
253 | return 0; | |
254 | case hwmon_in_alarm: | |
255 | return adt7411_read_in_alarm(dev, 0, val); | |
1b109c49 MW |
256 | default: |
257 | return -EOPNOTSUPP; | |
258 | } | |
259 | } | |
260 | ||
9bb2d47d | 261 | static int adt7411_update_vref(struct device *dev) |
1b109c49 MW |
262 | { |
263 | struct adt7411_data *data = dev_get_drvdata(dev); | |
264 | struct i2c_client *client = data->client; | |
9bb2d47d | 265 | int val; |
a95da110 | 266 | |
1b109c49 | 267 | if (time_after_eq(jiffies, data->next_update)) { |
9bb2d47d MW |
268 | val = i2c_smbus_read_byte_data(client, ADT7411_REG_CFG3); |
269 | if (val < 0) | |
270 | return val; | |
1b109c49 | 271 | |
9bb2d47d MW |
272 | if (val & ADT7411_CFG3_REF_VDD) { |
273 | val = adt7411_read_in_vdd(dev, hwmon_in_input, | |
1b109c49 | 274 | &data->vref_cached); |
9bb2d47d MW |
275 | if (val < 0) |
276 | return val; | |
1b109c49 MW |
277 | } else { |
278 | data->vref_cached = 2250; | |
279 | } | |
280 | ||
281 | data->next_update = jiffies + HZ; | |
282 | } | |
283 | ||
9bb2d47d MW |
284 | return 0; |
285 | } | |
286 | ||
287 | static int adt7411_read_in_chan(struct device *dev, u32 attr, int channel, | |
288 | long *val) | |
289 | { | |
290 | struct adt7411_data *data = dev_get_drvdata(dev); | |
291 | struct i2c_client *client = data->client; | |
292 | ||
293 | int ret; | |
294 | int reg, lsb_reg, lsb_shift; | |
295 | int nr = channel - 1; | |
296 | ||
297 | mutex_lock(&data->update_lock); | |
298 | ret = adt7411_update_vref(dev); | |
299 | if (ret < 0) | |
300 | goto exit_unlock; | |
301 | ||
1b109c49 MW |
302 | switch (attr) { |
303 | case hwmon_in_input: | |
304 | lsb_reg = ADT7411_REG_EXT_TEMP_AIN14_LSB + (nr >> 2); | |
305 | lsb_shift = 2 * (nr & 0x03); | |
306 | ret = adt7411_read_10_bit(client, lsb_reg, | |
307 | ADT7411_REG_EXT_TEMP_AIN1_MSB + nr, | |
308 | lsb_shift); | |
309 | if (ret < 0) | |
310 | goto exit_unlock; | |
311 | *val = ret * data->vref_cached / 1024; | |
312 | ret = 0; | |
313 | break; | |
9bb2d47d MW |
314 | case hwmon_in_min: |
315 | case hwmon_in_max: | |
316 | reg = (attr == hwmon_in_min) | |
317 | ? ADT7411_REG_IN_LOW(channel) | |
318 | : ADT7411_REG_IN_HIGH(channel); | |
319 | ret = i2c_smbus_read_byte_data(client, reg); | |
320 | if (ret < 0) | |
321 | goto exit_unlock; | |
322 | *val = ret * data->vref_cached / 256; | |
323 | ret = 0; | |
324 | break; | |
325 | case hwmon_in_alarm: | |
326 | ret = adt7411_read_in_alarm(dev, channel, val); | |
327 | break; | |
1b109c49 MW |
328 | default: |
329 | ret = -EOPNOTSUPP; | |
330 | break; | |
331 | } | |
332 | exit_unlock: | |
333 | mutex_unlock(&data->update_lock); | |
334 | return ret; | |
a95da110 MW |
335 | } |
336 | ||
1b109c49 MW |
337 | static int adt7411_read_in(struct device *dev, u32 attr, int channel, |
338 | long *val) | |
339 | { | |
340 | if (channel == 0) | |
341 | return adt7411_read_in_vdd(dev, attr, val); | |
342 | else | |
343 | return adt7411_read_in_chan(dev, attr, channel, val); | |
344 | } | |
345 | ||
9bb2d47d MW |
346 | |
347 | static int adt7411_read_temp_alarm(struct device *dev, u32 attr, int channel, | |
348 | long *val) | |
349 | { | |
350 | struct adt7411_data *data = dev_get_drvdata(dev); | |
351 | struct i2c_client *client = data->client; | |
352 | int ret, bit; | |
353 | ||
354 | ret = i2c_smbus_read_byte_data(client, ADT7411_REG_STAT_1); | |
355 | if (ret < 0) | |
356 | return ret; | |
357 | ||
358 | switch (attr) { | |
359 | case hwmon_temp_min_alarm: | |
360 | bit = channel ? ADT7411_STAT_1_EXT_TEMP_LOW | |
361 | : ADT7411_STAT_1_INT_TEMP_LOW; | |
362 | break; | |
363 | case hwmon_temp_max_alarm: | |
364 | bit = channel ? ADT7411_STAT_1_EXT_TEMP_HIGH_AIN1 | |
365 | : ADT7411_STAT_1_INT_TEMP_HIGH; | |
366 | break; | |
367 | case hwmon_temp_fault: | |
368 | bit = ADT7411_STAT_1_EXT_TEMP_FAULT; | |
369 | break; | |
370 | default: | |
371 | return -EOPNOTSUPP; | |
372 | } | |
373 | ||
374 | *val = !!(ret & bit); | |
375 | return 0; | |
376 | } | |
377 | ||
1b109c49 MW |
378 | static int adt7411_read_temp(struct device *dev, u32 attr, int channel, |
379 | long *val) | |
380 | { | |
381 | struct adt7411_data *data = dev_get_drvdata(dev); | |
382 | struct i2c_client *client = data->client; | |
9bb2d47d | 383 | int ret, reg, regl, regh; |
1b109c49 MW |
384 | |
385 | switch (attr) { | |
386 | case hwmon_temp_input: | |
387 | regl = channel ? ADT7411_REG_EXT_TEMP_AIN14_LSB : | |
388 | ADT7411_REG_INT_TEMP_VDD_LSB; | |
389 | regh = channel ? ADT7411_REG_EXT_TEMP_AIN1_MSB : | |
390 | ADT7411_REG_INT_TEMP_MSB; | |
391 | ret = adt7411_read_10_bit(client, regl, regh, 0); | |
392 | if (ret < 0) | |
393 | return ret; | |
394 | ret = ret & 0x200 ? ret - 0x400 : ret; /* 10 bit signed */ | |
395 | *val = ret * 250; | |
396 | return 0; | |
9bb2d47d MW |
397 | case hwmon_temp_min: |
398 | case hwmon_temp_max: | |
399 | reg = (attr == hwmon_temp_min) | |
400 | ? ADT7411_REG_TEMP_LOW(channel) | |
401 | : ADT7411_REG_TEMP_HIGH(channel); | |
402 | ret = i2c_smbus_read_byte_data(client, reg); | |
403 | if (ret < 0) | |
404 | return ret; | |
405 | ret = ret & 0x80 ? ret - 0x100 : ret; /* 8 bit signed */ | |
406 | *val = ret * 1000; | |
407 | return 0; | |
408 | case hwmon_temp_min_alarm: | |
409 | case hwmon_temp_max_alarm: | |
410 | case hwmon_temp_fault: | |
411 | return adt7411_read_temp_alarm(dev, attr, channel, val); | |
1b109c49 MW |
412 | default: |
413 | return -EOPNOTSUPP; | |
414 | } | |
415 | } | |
416 | ||
417 | static int adt7411_read(struct device *dev, enum hwmon_sensor_types type, | |
418 | u32 attr, int channel, long *val) | |
419 | { | |
420 | switch (type) { | |
421 | case hwmon_in: | |
422 | return adt7411_read_in(dev, attr, channel, val); | |
423 | case hwmon_temp: | |
424 | return adt7411_read_temp(dev, attr, channel, val); | |
425 | default: | |
426 | return -EOPNOTSUPP; | |
427 | } | |
428 | } | |
429 | ||
9bb2d47d MW |
430 | static int adt7411_write_in_vdd(struct device *dev, u32 attr, long val) |
431 | { | |
432 | struct adt7411_data *data = dev_get_drvdata(dev); | |
433 | struct i2c_client *client = data->client; | |
434 | int reg; | |
435 | ||
436 | val = clamp_val(val, 0, 255 * 7000 / 256); | |
437 | val = DIV_ROUND_CLOSEST(val * 256, 7000); | |
438 | ||
439 | switch (attr) { | |
440 | case hwmon_in_min: | |
441 | reg = ADT7411_REG_VDD_LOW; | |
442 | break; | |
443 | case hwmon_in_max: | |
444 | reg = ADT7411_REG_VDD_HIGH; | |
445 | break; | |
446 | default: | |
447 | return -EOPNOTSUPP; | |
448 | } | |
449 | ||
450 | return i2c_smbus_write_byte_data(client, reg, val); | |
451 | } | |
452 | ||
453 | static int adt7411_write_in_chan(struct device *dev, u32 attr, int channel, | |
454 | long val) | |
455 | { | |
456 | struct adt7411_data *data = dev_get_drvdata(dev); | |
457 | struct i2c_client *client = data->client; | |
458 | int ret, reg; | |
459 | ||
460 | mutex_lock(&data->update_lock); | |
461 | ret = adt7411_update_vref(dev); | |
462 | if (ret < 0) | |
463 | goto exit_unlock; | |
464 | val = clamp_val(val, 0, 255 * data->vref_cached / 256); | |
465 | val = DIV_ROUND_CLOSEST(val * 256, data->vref_cached); | |
466 | ||
467 | switch (attr) { | |
468 | case hwmon_in_min: | |
469 | reg = ADT7411_REG_IN_LOW(channel); | |
470 | break; | |
471 | case hwmon_in_max: | |
472 | reg = ADT7411_REG_IN_HIGH(channel); | |
473 | break; | |
474 | default: | |
475 | ret = -EOPNOTSUPP; | |
476 | goto exit_unlock; | |
477 | } | |
478 | ||
479 | ret = i2c_smbus_write_byte_data(client, reg, val); | |
480 | exit_unlock: | |
481 | mutex_unlock(&data->update_lock); | |
482 | return ret; | |
483 | } | |
484 | ||
485 | static int adt7411_write_in(struct device *dev, u32 attr, int channel, | |
486 | long val) | |
487 | { | |
488 | if (channel == 0) | |
489 | return adt7411_write_in_vdd(dev, attr, val); | |
490 | else | |
491 | return adt7411_write_in_chan(dev, attr, channel, val); | |
492 | } | |
493 | ||
494 | static int adt7411_write_temp(struct device *dev, u32 attr, int channel, | |
495 | long val) | |
496 | { | |
497 | struct adt7411_data *data = dev_get_drvdata(dev); | |
498 | struct i2c_client *client = data->client; | |
499 | int reg; | |
500 | ||
501 | val = clamp_val(val, -128000, 127000); | |
502 | val = DIV_ROUND_CLOSEST(val, 1000); | |
503 | ||
504 | switch (attr) { | |
505 | case hwmon_temp_min: | |
506 | reg = ADT7411_REG_TEMP_LOW(channel); | |
507 | break; | |
508 | case hwmon_temp_max: | |
509 | reg = ADT7411_REG_TEMP_HIGH(channel); | |
510 | break; | |
511 | default: | |
512 | return -EOPNOTSUPP; | |
513 | } | |
514 | ||
515 | return i2c_smbus_write_byte_data(client, reg, val); | |
516 | } | |
517 | ||
518 | static int adt7411_write(struct device *dev, enum hwmon_sensor_types type, | |
519 | u32 attr, int channel, long val) | |
520 | { | |
521 | switch (type) { | |
522 | case hwmon_in: | |
523 | return adt7411_write_in(dev, attr, channel, val); | |
524 | case hwmon_temp: | |
525 | return adt7411_write_temp(dev, attr, channel, val); | |
526 | default: | |
527 | return -EOPNOTSUPP; | |
528 | } | |
529 | } | |
530 | ||
1b109c49 MW |
531 | static umode_t adt7411_is_visible(const void *_data, |
532 | enum hwmon_sensor_types type, | |
533 | u32 attr, int channel) | |
534 | { | |
535 | const struct adt7411_data *data = _data; | |
9bb2d47d | 536 | bool visible; |
1b109c49 MW |
537 | |
538 | switch (type) { | |
539 | case hwmon_in: | |
9bb2d47d MW |
540 | visible = channel == 0 || channel >= 3 || !data->use_ext_temp; |
541 | switch (attr) { | |
542 | case hwmon_in_input: | |
543 | case hwmon_in_alarm: | |
544 | return visible ? S_IRUGO : 0; | |
545 | case hwmon_in_min: | |
546 | case hwmon_in_max: | |
547 | return visible ? S_IRUGO | S_IWUSR : 0; | |
548 | } | |
549 | break; | |
1b109c49 | 550 | case hwmon_temp: |
9bb2d47d MW |
551 | visible = channel == 0 || data->use_ext_temp; |
552 | switch (attr) { | |
553 | case hwmon_temp_input: | |
554 | case hwmon_temp_min_alarm: | |
555 | case hwmon_temp_max_alarm: | |
556 | case hwmon_temp_fault: | |
557 | return visible ? S_IRUGO : 0; | |
558 | case hwmon_temp_min: | |
559 | case hwmon_temp_max: | |
560 | return visible ? S_IRUGO | S_IWUSR : 0; | |
561 | } | |
562 | break; | |
1b109c49 | 563 | default: |
9bb2d47d | 564 | break; |
1b109c49 | 565 | } |
9bb2d47d | 566 | return 0; |
1b109c49 | 567 | } |
d84ca5b3 WS |
568 | |
569 | static int adt7411_detect(struct i2c_client *client, | |
570 | struct i2c_board_info *info) | |
571 | { | |
572 | int val; | |
573 | ||
574 | if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
575 | return -ENODEV; | |
576 | ||
577 | val = i2c_smbus_read_byte_data(client, ADT7411_REG_MANUFACTURER_ID); | |
578 | if (val < 0 || val != ADT7411_MANUFACTURER_ID) { | |
b55f3757 GR |
579 | dev_dbg(&client->dev, |
580 | "Wrong manufacturer ID. Got %d, expected %d\n", | |
581 | val, ADT7411_MANUFACTURER_ID); | |
d84ca5b3 WS |
582 | return -ENODEV; |
583 | } | |
584 | ||
585 | val = i2c_smbus_read_byte_data(client, ADT7411_REG_DEVICE_ID); | |
586 | if (val < 0 || val != ADT7411_DEVICE_ID) { | |
b55f3757 GR |
587 | dev_dbg(&client->dev, |
588 | "Wrong device ID. Got %d, expected %d\n", | |
589 | val, ADT7411_DEVICE_ID); | |
d84ca5b3 WS |
590 | return -ENODEV; |
591 | } | |
592 | ||
f2f394db | 593 | strscpy(info->type, "adt7411", I2C_NAME_SIZE); |
d84ca5b3 WS |
594 | |
595 | return 0; | |
596 | } | |
597 | ||
601807bb MW |
598 | static int adt7411_init_device(struct adt7411_data *data) |
599 | { | |
600 | int ret; | |
601 | u8 val; | |
602 | ||
603 | ret = i2c_smbus_read_byte_data(data->client, ADT7411_REG_CFG3); | |
604 | if (ret < 0) | |
605 | return ret; | |
606 | ||
607 | /* | |
608 | * We must only write zero to bit 1 and bit 2 and only one to bit 3 | |
609 | * according to the datasheet. | |
610 | */ | |
611 | val = ret; | |
612 | val &= ~(ADT7411_CFG3_RESERVED_BIT1 | ADT7411_CFG3_RESERVED_BIT2); | |
613 | val |= ADT7411_CFG3_RESERVED_BIT3; | |
614 | ||
615 | ret = i2c_smbus_write_byte_data(data->client, ADT7411_REG_CFG3, val); | |
616 | if (ret < 0) | |
617 | return ret; | |
618 | ||
619 | ret = i2c_smbus_read_byte_data(data->client, ADT7411_REG_CFG1); | |
620 | if (ret < 0) | |
621 | return ret; | |
622 | ||
a95da110 MW |
623 | data->use_ext_temp = ret & ADT7411_CFG1_EXT_TDM; |
624 | ||
601807bb MW |
625 | /* |
626 | * We must only write zero to bit 1 and only one to bit 3 according to | |
627 | * the datasheet. | |
628 | */ | |
629 | val = ret; | |
630 | val &= ~ADT7411_CFG1_RESERVED_BIT1; | |
631 | val |= ADT7411_CFG1_RESERVED_BIT3; | |
632 | ||
633 | /* enable monitoring */ | |
634 | val |= ADT7411_CFG1_START_MONITOR; | |
635 | ||
636 | return i2c_smbus_write_byte_data(data->client, ADT7411_REG_CFG1, val); | |
637 | } | |
638 | ||
1b109c49 | 639 | static const struct hwmon_channel_info *adt7411_info[] = { |
ff56121e GR |
640 | HWMON_CHANNEL_INFO(in, |
641 | HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM, | |
642 | HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM, | |
643 | HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM, | |
644 | HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM, | |
645 | HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM, | |
646 | HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM, | |
647 | HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM, | |
648 | HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM, | |
649 | HWMON_I_INPUT | HWMON_I_MIN | HWMON_I_MAX | HWMON_I_ALARM), | |
650 | HWMON_CHANNEL_INFO(temp, | |
651 | HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MIN_ALARM | | |
652 | HWMON_T_MAX | HWMON_T_MAX_ALARM, | |
653 | HWMON_T_INPUT | HWMON_T_MIN | HWMON_T_MIN_ALARM | | |
654 | HWMON_T_MAX | HWMON_T_MAX_ALARM | HWMON_T_FAULT), | |
1b109c49 MW |
655 | NULL |
656 | }; | |
657 | ||
658 | static const struct hwmon_ops adt7411_hwmon_ops = { | |
659 | .is_visible = adt7411_is_visible, | |
660 | .read = adt7411_read, | |
9bb2d47d | 661 | .write = adt7411_write, |
1b109c49 MW |
662 | }; |
663 | ||
664 | static const struct hwmon_chip_info adt7411_chip_info = { | |
665 | .ops = &adt7411_hwmon_ops, | |
666 | .info = adt7411_info, | |
667 | }; | |
668 | ||
67487038 | 669 | static int adt7411_probe(struct i2c_client *client) |
d84ca5b3 | 670 | { |
eac83cd9 | 671 | struct device *dev = &client->dev; |
d84ca5b3 | 672 | struct adt7411_data *data; |
eac83cd9 | 673 | struct device *hwmon_dev; |
d84ca5b3 WS |
674 | int ret; |
675 | ||
eac83cd9 | 676 | data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); |
d84ca5b3 WS |
677 | if (!data) |
678 | return -ENOMEM; | |
679 | ||
680 | i2c_set_clientdata(client, data); | |
eac83cd9 | 681 | data->client = client; |
d84ca5b3 | 682 | mutex_init(&data->device_lock); |
23244985 | 683 | mutex_init(&data->update_lock); |
d84ca5b3 | 684 | |
601807bb | 685 | ret = adt7411_init_device(data); |
d84ca5b3 | 686 | if (ret < 0) |
65ec17b0 | 687 | return ret; |
d84ca5b3 WS |
688 | |
689 | /* force update on first occasion */ | |
690 | data->next_update = jiffies; | |
691 | ||
1b109c49 MW |
692 | hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name, |
693 | data, | |
694 | &adt7411_chip_info, | |
695 | adt7411_groups); | |
eac83cd9 | 696 | return PTR_ERR_OR_ZERO(hwmon_dev); |
d84ca5b3 WS |
697 | } |
698 | ||
699 | static const struct i2c_device_id adt7411_id[] = { | |
700 | { "adt7411", 0 }, | |
701 | { } | |
702 | }; | |
a7254d68 | 703 | MODULE_DEVICE_TABLE(i2c, adt7411_id); |
d84ca5b3 WS |
704 | |
705 | static struct i2c_driver adt7411_driver = { | |
706 | .driver = { | |
707 | .name = "adt7411", | |
708 | }, | |
67487038 | 709 | .probe_new = adt7411_probe, |
d84ca5b3 WS |
710 | .id_table = adt7411_id, |
711 | .detect = adt7411_detect, | |
712 | .address_list = normal_i2c, | |
713 | .class = I2C_CLASS_HWMON, | |
714 | }; | |
715 | ||
f0967eea | 716 | module_i2c_driver(adt7411_driver); |
d84ca5b3 | 717 | |
6e0498dd | 718 | MODULE_AUTHOR("Sascha Hauer, Wolfram Sang <kernel@pengutronix.de>"); |
d84ca5b3 WS |
719 | MODULE_DESCRIPTION("ADT7411 driver"); |
720 | MODULE_LICENSE("GPL v2"); |