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594fbe71 AE |
1 | /* |
2 | * g762 - Driver for the Global Mixed-mode Technology Inc. fan speed | |
3 | * PWM controller chips from G762 family, i.e. G762 and G763 | |
4 | * | |
5 | * Copyright (C) 2013, Arnaud EBALARD <arno@natisbad.org> | |
6 | * | |
7 | * This work is based on a basic version for 2.6.31 kernel developed | |
8 | * by Olivier Mouchet for LaCie. Updates and correction have been | |
9 | * performed to run on recent kernels. Additional features, like the | |
10 | * ability to configure various characteristics via .dts file or | |
11 | * board init file have been added. Detailed datasheet on which this | |
12 | * development is based is available here: | |
13 | * | |
14 | * http://natisbad.org/NAS/refs/GMT_EDS-762_763-080710-0.2.pdf | |
15 | * | |
16 | * Headers from previous developments have been kept below: | |
17 | * | |
18 | * Copyright (c) 2009 LaCie | |
19 | * | |
20 | * Author: Olivier Mouchet <olivier.mouchet@gmail.com> | |
21 | * | |
22 | * based on g760a code written by Herbert Valerio Riedel <hvr@gnu.org> | |
23 | * Copyright (C) 2007 Herbert Valerio Riedel <hvr@gnu.org> | |
24 | * | |
25 | * g762: minimal datasheet available at: | |
26 | * http://www.gmt.com.tw/product/datasheet/EDS-762_3.pdf | |
27 | * | |
28 | * This program is free software; you can redistribute it and/or modify | |
29 | * it under the terms of the GNU General Public License as published by | |
30 | * the Free Software Foundation; either version 2 of the License, or | |
31 | * (at your option) any later version. | |
32 | * | |
33 | * This program is distributed in the hope that it will be useful, | |
34 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
35 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
36 | * GNU General Public License for more details. | |
37 | * | |
38 | * You should have received a copy of the GNU General Public License | |
39 | * along with this program; if not, write to the Free Software | |
40 | * Foundation. | |
41 | */ | |
42 | ||
43 | #include <linux/device.h> | |
44 | #include <linux/module.h> | |
45 | #include <linux/init.h> | |
46 | #include <linux/jiffies.h> | |
47 | #include <linux/i2c.h> | |
48 | #include <linux/hwmon.h> | |
49 | #include <linux/hwmon-sysfs.h> | |
50 | #include <linux/err.h> | |
51 | #include <linux/mutex.h> | |
52 | #include <linux/kernel.h> | |
53 | #include <linux/clk.h> | |
54 | #include <linux/of.h> | |
55 | #include <linux/of_device.h> | |
56 | #include <linux/platform_data/g762.h> | |
57 | ||
58 | #define DRVNAME "g762" | |
59 | ||
60 | static const struct i2c_device_id g762_id[] = { | |
61 | { "g762", 0 }, | |
62 | { "g763", 0 }, | |
63 | { } | |
64 | }; | |
65 | MODULE_DEVICE_TABLE(i2c, g762_id); | |
66 | ||
67 | enum g762_regs { | |
68 | G762_REG_SET_CNT = 0x00, | |
69 | G762_REG_ACT_CNT = 0x01, | |
70 | G762_REG_FAN_STA = 0x02, | |
71 | G762_REG_SET_OUT = 0x03, | |
72 | G762_REG_FAN_CMD1 = 0x04, | |
73 | G762_REG_FAN_CMD2 = 0x05, | |
74 | }; | |
75 | ||
76 | /* Config register bits */ | |
77 | #define G762_REG_FAN_CMD1_DET_FAN_FAIL 0x80 /* enable fan_fail signal */ | |
78 | #define G762_REG_FAN_CMD1_DET_FAN_OOC 0x40 /* enable fan_out_of_control */ | |
79 | #define G762_REG_FAN_CMD1_OUT_MODE 0x20 /* out mode: PWM or DC */ | |
80 | #define G762_REG_FAN_CMD1_FAN_MODE 0x10 /* fan mode: closed/open-loop */ | |
81 | #define G762_REG_FAN_CMD1_CLK_DIV_ID1 0x08 /* clock divisor value */ | |
82 | #define G762_REG_FAN_CMD1_CLK_DIV_ID0 0x04 | |
83 | #define G762_REG_FAN_CMD1_PWM_POLARITY 0x02 /* PWM polarity */ | |
84 | #define G762_REG_FAN_CMD1_PULSE_PER_REV 0x01 /* pulse per fan revolution */ | |
85 | ||
86 | #define G762_REG_FAN_CMD2_GEAR_MODE_1 0x08 /* fan gear mode */ | |
87 | #define G762_REG_FAN_CMD2_GEAR_MODE_0 0x04 | |
88 | #define G762_REG_FAN_CMD2_FAN_STARTV_1 0x02 /* fan startup voltage */ | |
89 | #define G762_REG_FAN_CMD2_FAN_STARTV_0 0x01 | |
90 | ||
91 | #define G762_REG_FAN_STA_FAIL 0x02 /* fan fail */ | |
92 | #define G762_REG_FAN_STA_OOC 0x01 /* fan out of control */ | |
93 | ||
94 | /* Config register values */ | |
95 | #define G762_OUT_MODE_PWM 1 | |
96 | #define G762_OUT_MODE_DC 0 | |
97 | ||
98 | #define G762_FAN_MODE_CLOSED_LOOP 2 | |
99 | #define G762_FAN_MODE_OPEN_LOOP 1 | |
100 | ||
101 | #define G762_PWM_POLARITY_NEGATIVE 1 | |
102 | #define G762_PWM_POLARITY_POSITIVE 0 | |
103 | ||
104 | /* Register data is read (and cached) at most once per second. */ | |
105 | #define G762_UPDATE_INTERVAL HZ | |
106 | ||
107 | /* | |
108 | * Extract pulse count per fan revolution value (2 or 4) from given | |
109 | * FAN_CMD1 register value. | |
110 | */ | |
111 | #define G762_PULSE_FROM_REG(reg) \ | |
112 | ((((reg) & G762_REG_FAN_CMD1_PULSE_PER_REV) + 1) << 1) | |
113 | ||
114 | /* | |
115 | * Extract fan clock divisor (1, 2, 4 or 8) from given FAN_CMD1 | |
116 | * register value. | |
117 | */ | |
118 | #define G762_CLKDIV_FROM_REG(reg) \ | |
119 | (1 << (((reg) & (G762_REG_FAN_CMD1_CLK_DIV_ID0 | \ | |
120 | G762_REG_FAN_CMD1_CLK_DIV_ID1)) >> 2)) | |
121 | ||
122 | /* | |
123 | * Extract fan gear mode multiplier value (0, 2 or 4) from given | |
124 | * FAN_CMD2 register value. | |
125 | */ | |
126 | #define G762_GEARMULT_FROM_REG(reg) \ | |
127 | (1 << (((reg) & (G762_REG_FAN_CMD2_GEAR_MODE_0 | \ | |
128 | G762_REG_FAN_CMD2_GEAR_MODE_1)) >> 2)) | |
129 | ||
130 | struct g762_data { | |
398e16db | 131 | struct i2c_client *client; |
594fbe71 AE |
132 | struct clk *clk; |
133 | ||
134 | /* update mutex */ | |
135 | struct mutex update_lock; | |
136 | ||
137 | /* board specific parameters. */ | |
138 | u32 clk_freq; | |
139 | ||
140 | /* g762 register cache */ | |
141 | bool valid; | |
142 | unsigned long last_updated; /* in jiffies */ | |
143 | ||
144 | u8 set_cnt; /* controls fan rotation speed in closed-loop mode */ | |
145 | u8 act_cnt; /* provides access to current fan RPM value */ | |
146 | u8 fan_sta; /* bit 0: set when actual fan speed is more than | |
147 | * 25% outside requested fan speed | |
148 | * bit 1: set when no transition occurs on fan | |
149 | * pin for 0.7s | |
150 | */ | |
151 | u8 set_out; /* controls fan rotation speed in open-loop mode */ | |
152 | u8 fan_cmd1; /* 0: FG_PLS_ID0 FG pulses count per revolution | |
153 | * 0: 2 counts per revolution | |
154 | * 1: 4 counts per revolution | |
155 | * 1: PWM_POLARITY 1: negative_duty | |
156 | * 0: positive_duty | |
157 | * 2,3: [FG_CLOCK_ID0, FG_CLK_ID1] | |
158 | * 00: Divide fan clock by 1 | |
159 | * 01: Divide fan clock by 2 | |
160 | * 10: Divide fan clock by 4 | |
161 | * 11: Divide fan clock by 8 | |
162 | * 4: FAN_MODE 1:closed-loop, 0:open-loop | |
163 | * 5: OUT_MODE 1:PWM, 0:DC | |
164 | * 6: DET_FAN_OOC enable "fan ooc" status | |
165 | * 7: DET_FAN_FAIL enable "fan fail" status | |
166 | */ | |
167 | u8 fan_cmd2; /* 0,1: FAN_STARTV 0,1,2,3 -> 0,32,64,96 dac_code | |
168 | * 2,3: FG_GEAR_MODE | |
169 | * 00: multiplier = 1 | |
170 | * 01: multiplier = 2 | |
171 | * 10: multiplier = 4 | |
172 | * 4: Mask ALERT# (g763 only) | |
173 | */ | |
174 | }; | |
175 | ||
176 | /* | |
177 | * Convert count value from fan controller register (FAN_SET_CNT) into fan | |
178 | * speed RPM value. Note that the datasheet documents a basic formula; | |
179 | * influence of additional parameters (fan clock divisor, fan gear mode) | |
180 | * have been infered from examples in the datasheet and tests. | |
181 | */ | |
182 | static inline unsigned int rpm_from_cnt(u8 cnt, u32 clk_freq, u16 p, | |
183 | u8 clk_div, u8 gear_mult) | |
184 | { | |
185 | if (cnt == 0xff) /* setting cnt to 255 stops the fan */ | |
186 | return 0; | |
187 | ||
188 | return (clk_freq * 30 * gear_mult) / ((cnt ? cnt : 1) * p * clk_div); | |
189 | } | |
190 | ||
191 | /* | |
192 | * Convert fan RPM value from sysfs into count value for fan controller | |
193 | * register (FAN_SET_CNT). | |
194 | */ | |
4fccd4a1 | 195 | static inline unsigned char cnt_from_rpm(unsigned long rpm, u32 clk_freq, u16 p, |
594fbe71 AE |
196 | u8 clk_div, u8 gear_mult) |
197 | { | |
4fccd4a1 GR |
198 | unsigned long f1 = clk_freq * 30 * gear_mult; |
199 | unsigned long f2 = p * clk_div; | |
200 | ||
201 | if (!rpm) /* to stop the fan, set cnt to 255 */ | |
594fbe71 AE |
202 | return 0xff; |
203 | ||
4fccd4a1 GR |
204 | rpm = clamp_val(rpm, f1 / (255 * f2), ULONG_MAX / f2); |
205 | return DIV_ROUND_CLOSEST(f1, rpm * f2); | |
594fbe71 AE |
206 | } |
207 | ||
208 | /* helper to grab and cache data, at most one time per second */ | |
209 | static struct g762_data *g762_update_client(struct device *dev) | |
210 | { | |
398e16db AL |
211 | struct g762_data *data = dev_get_drvdata(dev); |
212 | struct i2c_client *client = data->client; | |
594fbe71 AE |
213 | int ret = 0; |
214 | ||
215 | mutex_lock(&data->update_lock); | |
216 | if (time_before(jiffies, data->last_updated + G762_UPDATE_INTERVAL) && | |
217 | likely(data->valid)) | |
218 | goto out; | |
219 | ||
220 | ret = i2c_smbus_read_byte_data(client, G762_REG_SET_CNT); | |
221 | if (ret < 0) | |
222 | goto out; | |
223 | data->set_cnt = ret; | |
224 | ||
225 | ret = i2c_smbus_read_byte_data(client, G762_REG_ACT_CNT); | |
226 | if (ret < 0) | |
227 | goto out; | |
228 | data->act_cnt = ret; | |
229 | ||
230 | ret = i2c_smbus_read_byte_data(client, G762_REG_FAN_STA); | |
231 | if (ret < 0) | |
232 | goto out; | |
233 | data->fan_sta = ret; | |
234 | ||
235 | ret = i2c_smbus_read_byte_data(client, G762_REG_SET_OUT); | |
236 | if (ret < 0) | |
237 | goto out; | |
238 | data->set_out = ret; | |
239 | ||
240 | ret = i2c_smbus_read_byte_data(client, G762_REG_FAN_CMD1); | |
241 | if (ret < 0) | |
242 | goto out; | |
243 | data->fan_cmd1 = ret; | |
244 | ||
245 | ret = i2c_smbus_read_byte_data(client, G762_REG_FAN_CMD2); | |
246 | if (ret < 0) | |
247 | goto out; | |
248 | data->fan_cmd2 = ret; | |
249 | ||
250 | data->last_updated = jiffies; | |
251 | data->valid = true; | |
252 | out: | |
253 | mutex_unlock(&data->update_lock); | |
254 | ||
255 | if (ret < 0) /* upon error, encode it in return value */ | |
256 | data = ERR_PTR(ret); | |
257 | ||
258 | return data; | |
259 | } | |
260 | ||
261 | /* helpers for writing hardware parameters */ | |
262 | ||
263 | /* | |
264 | * Set input clock frequency received on CLK pin of the chip. Accepted values | |
265 | * are between 0 and 0xffffff. If zero is given, then default frequency | |
266 | * (32,768Hz) is used. Note that clock frequency is a characteristic of the | |
267 | * system but an internal parameter, i.e. value is not passed to the device. | |
268 | */ | |
269 | static int do_set_clk_freq(struct device *dev, unsigned long val) | |
270 | { | |
398e16db | 271 | struct g762_data *data = dev_get_drvdata(dev); |
594fbe71 AE |
272 | |
273 | if (val > 0xffffff) | |
274 | return -EINVAL; | |
275 | if (!val) | |
276 | val = 32768; | |
277 | ||
278 | data->clk_freq = val; | |
279 | ||
280 | return 0; | |
281 | } | |
282 | ||
283 | /* Set pwm mode. Accepts either 0 (PWM mode) or 1 (DC mode) */ | |
284 | static int do_set_pwm_mode(struct device *dev, unsigned long val) | |
285 | { | |
594fbe71 AE |
286 | struct g762_data *data = g762_update_client(dev); |
287 | int ret; | |
288 | ||
289 | if (IS_ERR(data)) | |
290 | return PTR_ERR(data); | |
291 | ||
292 | mutex_lock(&data->update_lock); | |
293 | switch (val) { | |
294 | case G762_OUT_MODE_PWM: | |
295 | data->fan_cmd1 |= G762_REG_FAN_CMD1_OUT_MODE; | |
296 | break; | |
297 | case G762_OUT_MODE_DC: | |
298 | data->fan_cmd1 &= ~G762_REG_FAN_CMD1_OUT_MODE; | |
299 | break; | |
300 | default: | |
301 | ret = -EINVAL; | |
302 | goto out; | |
303 | } | |
398e16db | 304 | ret = i2c_smbus_write_byte_data(data->client, G762_REG_FAN_CMD1, |
594fbe71 AE |
305 | data->fan_cmd1); |
306 | data->valid = false; | |
307 | out: | |
308 | mutex_unlock(&data->update_lock); | |
309 | ||
310 | return ret; | |
311 | } | |
312 | ||
313 | /* Set fan clock divisor. Accepts either 1, 2, 4 or 8. */ | |
314 | static int do_set_fan_div(struct device *dev, unsigned long val) | |
315 | { | |
594fbe71 AE |
316 | struct g762_data *data = g762_update_client(dev); |
317 | int ret; | |
318 | ||
319 | if (IS_ERR(data)) | |
320 | return PTR_ERR(data); | |
321 | ||
322 | mutex_lock(&data->update_lock); | |
323 | switch (val) { | |
324 | case 1: | |
325 | data->fan_cmd1 &= ~G762_REG_FAN_CMD1_CLK_DIV_ID0; | |
326 | data->fan_cmd1 &= ~G762_REG_FAN_CMD1_CLK_DIV_ID1; | |
327 | break; | |
328 | case 2: | |
329 | data->fan_cmd1 |= G762_REG_FAN_CMD1_CLK_DIV_ID0; | |
330 | data->fan_cmd1 &= ~G762_REG_FAN_CMD1_CLK_DIV_ID1; | |
331 | break; | |
332 | case 4: | |
333 | data->fan_cmd1 &= ~G762_REG_FAN_CMD1_CLK_DIV_ID0; | |
334 | data->fan_cmd1 |= G762_REG_FAN_CMD1_CLK_DIV_ID1; | |
335 | break; | |
336 | case 8: | |
337 | data->fan_cmd1 |= G762_REG_FAN_CMD1_CLK_DIV_ID0; | |
338 | data->fan_cmd1 |= G762_REG_FAN_CMD1_CLK_DIV_ID1; | |
339 | break; | |
340 | default: | |
341 | ret = -EINVAL; | |
342 | goto out; | |
343 | } | |
398e16db | 344 | ret = i2c_smbus_write_byte_data(data->client, G762_REG_FAN_CMD1, |
594fbe71 AE |
345 | data->fan_cmd1); |
346 | data->valid = false; | |
347 | out: | |
348 | mutex_unlock(&data->update_lock); | |
349 | ||
350 | return ret; | |
351 | } | |
352 | ||
353 | /* Set fan gear mode. Accepts either 0, 1 or 2. */ | |
354 | static int do_set_fan_gear_mode(struct device *dev, unsigned long val) | |
355 | { | |
594fbe71 AE |
356 | struct g762_data *data = g762_update_client(dev); |
357 | int ret; | |
358 | ||
359 | if (IS_ERR(data)) | |
360 | return PTR_ERR(data); | |
361 | ||
362 | mutex_lock(&data->update_lock); | |
363 | switch (val) { | |
364 | case 0: | |
365 | data->fan_cmd2 &= ~G762_REG_FAN_CMD2_GEAR_MODE_0; | |
366 | data->fan_cmd2 &= ~G762_REG_FAN_CMD2_GEAR_MODE_1; | |
367 | break; | |
368 | case 1: | |
369 | data->fan_cmd2 |= G762_REG_FAN_CMD2_GEAR_MODE_0; | |
370 | data->fan_cmd2 &= ~G762_REG_FAN_CMD2_GEAR_MODE_1; | |
371 | break; | |
372 | case 2: | |
373 | data->fan_cmd2 &= ~G762_REG_FAN_CMD2_GEAR_MODE_0; | |
374 | data->fan_cmd2 |= G762_REG_FAN_CMD2_GEAR_MODE_1; | |
375 | break; | |
376 | default: | |
377 | ret = -EINVAL; | |
378 | goto out; | |
379 | } | |
398e16db | 380 | ret = i2c_smbus_write_byte_data(data->client, G762_REG_FAN_CMD2, |
594fbe71 AE |
381 | data->fan_cmd2); |
382 | data->valid = false; | |
383 | out: | |
384 | mutex_unlock(&data->update_lock); | |
385 | ||
386 | return ret; | |
387 | } | |
388 | ||
389 | /* Set number of fan pulses per revolution. Accepts either 2 or 4. */ | |
390 | static int do_set_fan_pulses(struct device *dev, unsigned long val) | |
391 | { | |
594fbe71 AE |
392 | struct g762_data *data = g762_update_client(dev); |
393 | int ret; | |
394 | ||
395 | if (IS_ERR(data)) | |
396 | return PTR_ERR(data); | |
397 | ||
398 | mutex_lock(&data->update_lock); | |
399 | switch (val) { | |
400 | case 2: | |
401 | data->fan_cmd1 &= ~G762_REG_FAN_CMD1_PULSE_PER_REV; | |
402 | break; | |
403 | case 4: | |
404 | data->fan_cmd1 |= G762_REG_FAN_CMD1_PULSE_PER_REV; | |
405 | break; | |
406 | default: | |
407 | ret = -EINVAL; | |
408 | goto out; | |
409 | } | |
398e16db | 410 | ret = i2c_smbus_write_byte_data(data->client, G762_REG_FAN_CMD1, |
594fbe71 AE |
411 | data->fan_cmd1); |
412 | data->valid = false; | |
413 | out: | |
414 | mutex_unlock(&data->update_lock); | |
415 | ||
416 | return ret; | |
417 | } | |
418 | ||
419 | /* Set fan mode. Accepts either 1 (open-loop) or 2 (closed-loop). */ | |
420 | static int do_set_pwm_enable(struct device *dev, unsigned long val) | |
421 | { | |
594fbe71 AE |
422 | struct g762_data *data = g762_update_client(dev); |
423 | int ret; | |
424 | ||
425 | if (IS_ERR(data)) | |
426 | return PTR_ERR(data); | |
427 | ||
428 | mutex_lock(&data->update_lock); | |
429 | switch (val) { | |
430 | case G762_FAN_MODE_CLOSED_LOOP: | |
431 | data->fan_cmd1 |= G762_REG_FAN_CMD1_FAN_MODE; | |
432 | break; | |
433 | case G762_FAN_MODE_OPEN_LOOP: | |
434 | data->fan_cmd1 &= ~G762_REG_FAN_CMD1_FAN_MODE; | |
435 | /* | |
436 | * BUG FIX: if SET_CNT register value is 255 then, for some | |
437 | * unknown reason, fan will not rotate as expected, no matter | |
438 | * the value of SET_OUT (to be specific, this seems to happen | |
439 | * only in PWM mode). To workaround this bug, we give SET_CNT | |
440 | * value of 254 if it is 255 when switching to open-loop. | |
441 | */ | |
442 | if (data->set_cnt == 0xff) | |
398e16db AL |
443 | i2c_smbus_write_byte_data(data->client, |
444 | G762_REG_SET_CNT, 254); | |
594fbe71 AE |
445 | break; |
446 | default: | |
447 | ret = -EINVAL; | |
448 | goto out; | |
449 | } | |
450 | ||
398e16db | 451 | ret = i2c_smbus_write_byte_data(data->client, G762_REG_FAN_CMD1, |
594fbe71 AE |
452 | data->fan_cmd1); |
453 | data->valid = false; | |
454 | out: | |
455 | mutex_unlock(&data->update_lock); | |
456 | ||
457 | return ret; | |
458 | } | |
459 | ||
460 | /* Set PWM polarity. Accepts either 0 (positive duty) or 1 (negative duty) */ | |
461 | static int do_set_pwm_polarity(struct device *dev, unsigned long val) | |
462 | { | |
594fbe71 AE |
463 | struct g762_data *data = g762_update_client(dev); |
464 | int ret; | |
465 | ||
466 | if (IS_ERR(data)) | |
467 | return PTR_ERR(data); | |
468 | ||
469 | mutex_lock(&data->update_lock); | |
470 | switch (val) { | |
471 | case G762_PWM_POLARITY_POSITIVE: | |
472 | data->fan_cmd1 &= ~G762_REG_FAN_CMD1_PWM_POLARITY; | |
473 | break; | |
474 | case G762_PWM_POLARITY_NEGATIVE: | |
475 | data->fan_cmd1 |= G762_REG_FAN_CMD1_PWM_POLARITY; | |
476 | break; | |
477 | default: | |
478 | ret = -EINVAL; | |
479 | goto out; | |
480 | } | |
398e16db | 481 | ret = i2c_smbus_write_byte_data(data->client, G762_REG_FAN_CMD1, |
594fbe71 AE |
482 | data->fan_cmd1); |
483 | data->valid = false; | |
484 | out: | |
485 | mutex_unlock(&data->update_lock); | |
486 | ||
487 | return ret; | |
488 | } | |
489 | ||
490 | /* | |
491 | * Set pwm value. Accepts values between 0 (stops the fan) and | |
492 | * 255 (full speed). This only makes sense in open-loop mode. | |
493 | */ | |
494 | static int do_set_pwm(struct device *dev, unsigned long val) | |
495 | { | |
398e16db AL |
496 | struct g762_data *data = dev_get_drvdata(dev); |
497 | struct i2c_client *client = data->client; | |
594fbe71 AE |
498 | int ret; |
499 | ||
500 | if (val > 255) | |
501 | return -EINVAL; | |
502 | ||
503 | mutex_lock(&data->update_lock); | |
504 | ret = i2c_smbus_write_byte_data(client, G762_REG_SET_OUT, val); | |
505 | data->valid = false; | |
506 | mutex_unlock(&data->update_lock); | |
507 | ||
508 | return ret; | |
509 | } | |
510 | ||
511 | /* | |
512 | * Set fan RPM value. Can be called both in closed and open-loop mode | |
513 | * but effect will only be seen after closed-loop mode is configured. | |
514 | */ | |
515 | static int do_set_fan_target(struct device *dev, unsigned long val) | |
516 | { | |
594fbe71 AE |
517 | struct g762_data *data = g762_update_client(dev); |
518 | int ret; | |
519 | ||
520 | if (IS_ERR(data)) | |
521 | return PTR_ERR(data); | |
522 | ||
523 | mutex_lock(&data->update_lock); | |
524 | data->set_cnt = cnt_from_rpm(val, data->clk_freq, | |
525 | G762_PULSE_FROM_REG(data->fan_cmd1), | |
526 | G762_CLKDIV_FROM_REG(data->fan_cmd1), | |
527 | G762_GEARMULT_FROM_REG(data->fan_cmd2)); | |
398e16db | 528 | ret = i2c_smbus_write_byte_data(data->client, G762_REG_SET_CNT, |
594fbe71 AE |
529 | data->set_cnt); |
530 | data->valid = false; | |
531 | mutex_unlock(&data->update_lock); | |
532 | ||
533 | return ret; | |
534 | } | |
535 | ||
536 | /* Set fan startup voltage. Accepted values are either 0, 1, 2 or 3. */ | |
537 | static int do_set_fan_startv(struct device *dev, unsigned long val) | |
538 | { | |
594fbe71 AE |
539 | struct g762_data *data = g762_update_client(dev); |
540 | int ret; | |
541 | ||
542 | if (IS_ERR(data)) | |
543 | return PTR_ERR(data); | |
544 | ||
545 | mutex_lock(&data->update_lock); | |
546 | switch (val) { | |
547 | case 0: | |
548 | data->fan_cmd2 &= ~G762_REG_FAN_CMD2_FAN_STARTV_0; | |
549 | data->fan_cmd2 &= ~G762_REG_FAN_CMD2_FAN_STARTV_1; | |
550 | break; | |
551 | case 1: | |
552 | data->fan_cmd2 |= G762_REG_FAN_CMD2_FAN_STARTV_0; | |
553 | data->fan_cmd2 &= ~G762_REG_FAN_CMD2_FAN_STARTV_1; | |
554 | break; | |
555 | case 2: | |
556 | data->fan_cmd2 &= ~G762_REG_FAN_CMD2_FAN_STARTV_0; | |
557 | data->fan_cmd2 |= G762_REG_FAN_CMD2_FAN_STARTV_1; | |
558 | break; | |
559 | case 3: | |
560 | data->fan_cmd2 |= G762_REG_FAN_CMD2_FAN_STARTV_0; | |
561 | data->fan_cmd2 |= G762_REG_FAN_CMD2_FAN_STARTV_1; | |
562 | break; | |
563 | default: | |
564 | ret = -EINVAL; | |
565 | goto out; | |
566 | } | |
398e16db | 567 | ret = i2c_smbus_write_byte_data(data->client, G762_REG_FAN_CMD2, |
594fbe71 AE |
568 | data->fan_cmd2); |
569 | data->valid = false; | |
570 | out: | |
571 | mutex_unlock(&data->update_lock); | |
572 | ||
573 | return ret; | |
574 | } | |
575 | ||
576 | /* | |
577 | * Helper to import hardware characteristics from .dts file and push | |
578 | * those to the chip. | |
579 | */ | |
580 | ||
581 | #ifdef CONFIG_OF | |
adaa50b0 | 582 | static const struct of_device_id g762_dt_match[] = { |
594fbe71 AE |
583 | { .compatible = "gmt,g762" }, |
584 | { .compatible = "gmt,g763" }, | |
585 | { }, | |
586 | }; | |
de66b380 | 587 | MODULE_DEVICE_TABLE(of, g762_dt_match); |
594fbe71 AE |
588 | |
589 | /* | |
590 | * Grab clock (a required property), enable it, get (fixed) clock frequency | |
591 | * and store it. Note: upon success, clock has been prepared and enabled; it | |
592 | * must later be unprepared and disabled (e.g. during module unloading) by a | |
593 | * call to g762_of_clock_disable(). Note that a reference to clock is kept | |
594 | * in our private data structure to be used in this function. | |
595 | */ | |
47591baa HP |
596 | static void g762_of_clock_disable(void *data) |
597 | { | |
598 | struct g762_data *g762 = data; | |
599 | ||
600 | clk_disable_unprepare(g762->clk); | |
601 | clk_put(g762->clk); | |
602 | } | |
603 | ||
594fbe71 AE |
604 | static int g762_of_clock_enable(struct i2c_client *client) |
605 | { | |
606 | struct g762_data *data; | |
607 | unsigned long clk_freq; | |
608 | struct clk *clk; | |
609 | int ret; | |
610 | ||
611 | if (!client->dev.of_node) | |
612 | return 0; | |
613 | ||
614 | clk = of_clk_get(client->dev.of_node, 0); | |
615 | if (IS_ERR(clk)) { | |
616 | dev_err(&client->dev, "failed to get clock\n"); | |
617 | return PTR_ERR(clk); | |
618 | } | |
619 | ||
620 | ret = clk_prepare_enable(clk); | |
621 | if (ret) { | |
622 | dev_err(&client->dev, "failed to enable clock\n"); | |
623 | goto clk_put; | |
624 | } | |
625 | ||
626 | clk_freq = clk_get_rate(clk); | |
627 | ret = do_set_clk_freq(&client->dev, clk_freq); | |
628 | if (ret) { | |
629 | dev_err(&client->dev, "invalid clock freq %lu\n", clk_freq); | |
630 | goto clk_unprep; | |
631 | } | |
632 | ||
633 | data = i2c_get_clientdata(client); | |
634 | data->clk = clk; | |
635 | ||
47591baa | 636 | devm_add_action(&client->dev, g762_of_clock_disable, data); |
594fbe71 AE |
637 | return 0; |
638 | ||
639 | clk_unprep: | |
640 | clk_disable_unprepare(clk); | |
641 | ||
642 | clk_put: | |
643 | clk_put(clk); | |
644 | ||
645 | return ret; | |
646 | } | |
647 | ||
594fbe71 AE |
648 | static int g762_of_prop_import_one(struct i2c_client *client, |
649 | const char *pname, | |
650 | int (*psetter)(struct device *dev, | |
651 | unsigned long val)) | |
652 | { | |
fce9626c | 653 | int ret; |
594fbe71 AE |
654 | u32 pval; |
655 | ||
fce9626c | 656 | if (of_property_read_u32(client->dev.of_node, pname, &pval)) |
594fbe71 AE |
657 | return 0; |
658 | ||
594fbe71 AE |
659 | dev_dbg(&client->dev, "found %s (%d)\n", pname, pval); |
660 | ret = (*psetter)(&client->dev, pval); | |
661 | if (ret) | |
662 | dev_err(&client->dev, "unable to set %s (%d)\n", pname, pval); | |
663 | ||
664 | return ret; | |
665 | } | |
666 | ||
667 | static int g762_of_prop_import(struct i2c_client *client) | |
668 | { | |
669 | int ret; | |
670 | ||
671 | if (!client->dev.of_node) | |
672 | return 0; | |
673 | ||
674 | ret = g762_of_prop_import_one(client, "fan_gear_mode", | |
675 | do_set_fan_gear_mode); | |
676 | if (ret) | |
677 | return ret; | |
678 | ||
679 | ret = g762_of_prop_import_one(client, "pwm_polarity", | |
680 | do_set_pwm_polarity); | |
681 | if (ret) | |
682 | return ret; | |
683 | ||
684 | return g762_of_prop_import_one(client, "fan_startv", | |
685 | do_set_fan_startv); | |
686 | } | |
687 | ||
688 | #else | |
689 | static int g762_of_prop_import(struct i2c_client *client) | |
690 | { | |
691 | return 0; | |
692 | } | |
693 | ||
694 | static int g762_of_clock_enable(struct i2c_client *client) | |
695 | { | |
696 | return 0; | |
697 | } | |
594fbe71 AE |
698 | #endif |
699 | ||
700 | /* | |
701 | * Helper to import hardware characteristics from .dts file and push | |
702 | * those to the chip. | |
703 | */ | |
704 | ||
705 | static int g762_pdata_prop_import(struct i2c_client *client) | |
706 | { | |
a8b3a3a5 | 707 | struct g762_platform_data *pdata = dev_get_platdata(&client->dev); |
594fbe71 AE |
708 | int ret; |
709 | ||
710 | if (!pdata) | |
711 | return 0; | |
712 | ||
713 | ret = do_set_fan_gear_mode(&client->dev, pdata->fan_gear_mode); | |
714 | if (ret) | |
715 | return ret; | |
716 | ||
717 | ret = do_set_pwm_polarity(&client->dev, pdata->pwm_polarity); | |
718 | if (ret) | |
719 | return ret; | |
720 | ||
721 | ret = do_set_fan_startv(&client->dev, pdata->fan_startv); | |
722 | if (ret) | |
723 | return ret; | |
724 | ||
725 | return do_set_clk_freq(&client->dev, pdata->clk_freq); | |
726 | } | |
727 | ||
728 | /* | |
729 | * sysfs attributes | |
730 | */ | |
731 | ||
732 | /* | |
733 | * Read function for fan1_input sysfs file. Return current fan RPM value, or | |
734 | * 0 if fan is out of control. | |
735 | */ | |
251f65cd JL |
736 | static ssize_t fan1_input_show(struct device *dev, |
737 | struct device_attribute *da, char *buf) | |
594fbe71 AE |
738 | { |
739 | struct g762_data *data = g762_update_client(dev); | |
740 | unsigned int rpm = 0; | |
741 | ||
742 | if (IS_ERR(data)) | |
743 | return PTR_ERR(data); | |
744 | ||
745 | mutex_lock(&data->update_lock); | |
746 | /* reverse logic: fan out of control reporting is enabled low */ | |
747 | if (data->fan_sta & G762_REG_FAN_STA_OOC) { | |
748 | rpm = rpm_from_cnt(data->act_cnt, data->clk_freq, | |
749 | G762_PULSE_FROM_REG(data->fan_cmd1), | |
750 | G762_CLKDIV_FROM_REG(data->fan_cmd1), | |
751 | G762_GEARMULT_FROM_REG(data->fan_cmd2)); | |
752 | } | |
753 | mutex_unlock(&data->update_lock); | |
754 | ||
755 | return sprintf(buf, "%u\n", rpm); | |
756 | } | |
757 | ||
758 | /* | |
759 | * Read and write functions for pwm1_mode sysfs file. Get and set fan speed | |
760 | * control mode i.e. PWM (1) or DC (0). | |
761 | */ | |
251f65cd JL |
762 | static ssize_t pwm1_mode_show(struct device *dev, struct device_attribute *da, |
763 | char *buf) | |
594fbe71 AE |
764 | { |
765 | struct g762_data *data = g762_update_client(dev); | |
766 | ||
767 | if (IS_ERR(data)) | |
768 | return PTR_ERR(data); | |
769 | ||
770 | return sprintf(buf, "%d\n", | |
771 | !!(data->fan_cmd1 & G762_REG_FAN_CMD1_OUT_MODE)); | |
772 | } | |
773 | ||
251f65cd JL |
774 | static ssize_t pwm1_mode_store(struct device *dev, |
775 | struct device_attribute *da, const char *buf, | |
776 | size_t count) | |
594fbe71 AE |
777 | { |
778 | unsigned long val; | |
779 | int ret; | |
780 | ||
781 | if (kstrtoul(buf, 10, &val)) | |
782 | return -EINVAL; | |
783 | ||
784 | ret = do_set_pwm_mode(dev, val); | |
785 | if (ret < 0) | |
786 | return ret; | |
787 | ||
788 | return count; | |
789 | } | |
790 | ||
791 | /* | |
792 | * Read and write functions for fan1_div sysfs file. Get and set fan | |
793 | * controller prescaler value | |
794 | */ | |
251f65cd JL |
795 | static ssize_t fan1_div_show(struct device *dev, struct device_attribute *da, |
796 | char *buf) | |
594fbe71 AE |
797 | { |
798 | struct g762_data *data = g762_update_client(dev); | |
799 | ||
800 | if (IS_ERR(data)) | |
801 | return PTR_ERR(data); | |
802 | ||
803 | return sprintf(buf, "%d\n", G762_CLKDIV_FROM_REG(data->fan_cmd1)); | |
804 | } | |
805 | ||
251f65cd JL |
806 | static ssize_t fan1_div_store(struct device *dev, struct device_attribute *da, |
807 | const char *buf, size_t count) | |
594fbe71 AE |
808 | { |
809 | unsigned long val; | |
810 | int ret; | |
811 | ||
812 | if (kstrtoul(buf, 10, &val)) | |
813 | return -EINVAL; | |
814 | ||
815 | ret = do_set_fan_div(dev, val); | |
816 | if (ret < 0) | |
817 | return ret; | |
818 | ||
819 | return count; | |
820 | } | |
821 | ||
822 | /* | |
823 | * Read and write functions for fan1_pulses sysfs file. Get and set number | |
824 | * of tachometer pulses per fan revolution. | |
825 | */ | |
251f65cd JL |
826 | static ssize_t fan1_pulses_show(struct device *dev, |
827 | struct device_attribute *da, char *buf) | |
594fbe71 AE |
828 | { |
829 | struct g762_data *data = g762_update_client(dev); | |
830 | ||
831 | if (IS_ERR(data)) | |
832 | return PTR_ERR(data); | |
833 | ||
834 | return sprintf(buf, "%d\n", G762_PULSE_FROM_REG(data->fan_cmd1)); | |
835 | } | |
836 | ||
251f65cd JL |
837 | static ssize_t fan1_pulses_store(struct device *dev, |
838 | struct device_attribute *da, const char *buf, | |
839 | size_t count) | |
594fbe71 AE |
840 | { |
841 | unsigned long val; | |
842 | int ret; | |
843 | ||
844 | if (kstrtoul(buf, 10, &val)) | |
845 | return -EINVAL; | |
846 | ||
847 | ret = do_set_fan_pulses(dev, val); | |
848 | if (ret < 0) | |
849 | return ret; | |
850 | ||
851 | return count; | |
852 | } | |
853 | ||
854 | /* | |
855 | * Read and write functions for pwm1_enable. Get and set fan speed control mode | |
856 | * (i.e. closed or open-loop). | |
857 | * | |
858 | * Following documentation about hwmon's sysfs interface, a pwm1_enable node | |
4091fb95 | 859 | * should accept the following: |
594fbe71 AE |
860 | * |
861 | * 0 : no fan speed control (i.e. fan at full speed) | |
862 | * 1 : manual fan speed control enabled (use pwm[1-*]) (open-loop) | |
863 | * 2+: automatic fan speed control enabled (use fan[1-*]_target) (closed-loop) | |
864 | * | |
865 | * but we do not accept 0 as this mode is not natively supported by the chip | |
866 | * and it is not emulated by g762 driver. -EINVAL is returned in this case. | |
867 | */ | |
251f65cd JL |
868 | static ssize_t pwm1_enable_show(struct device *dev, |
869 | struct device_attribute *da, char *buf) | |
594fbe71 AE |
870 | { |
871 | struct g762_data *data = g762_update_client(dev); | |
872 | ||
873 | if (IS_ERR(data)) | |
874 | return PTR_ERR(data); | |
875 | ||
876 | return sprintf(buf, "%d\n", | |
877 | (!!(data->fan_cmd1 & G762_REG_FAN_CMD1_FAN_MODE)) + 1); | |
878 | } | |
879 | ||
251f65cd JL |
880 | static ssize_t pwm1_enable_store(struct device *dev, |
881 | struct device_attribute *da, const char *buf, | |
882 | size_t count) | |
594fbe71 AE |
883 | { |
884 | unsigned long val; | |
885 | int ret; | |
886 | ||
887 | if (kstrtoul(buf, 10, &val)) | |
888 | return -EINVAL; | |
889 | ||
890 | ret = do_set_pwm_enable(dev, val); | |
891 | if (ret < 0) | |
892 | return ret; | |
893 | ||
894 | return count; | |
895 | } | |
896 | ||
897 | /* | |
898 | * Read and write functions for pwm1 sysfs file. Get and set pwm value | |
899 | * (which affects fan speed) in open-loop mode. 0 stops the fan and 255 | |
900 | * makes it run at full speed. | |
901 | */ | |
251f65cd JL |
902 | static ssize_t pwm1_show(struct device *dev, struct device_attribute *da, |
903 | char *buf) | |
594fbe71 AE |
904 | { |
905 | struct g762_data *data = g762_update_client(dev); | |
906 | ||
907 | if (IS_ERR(data)) | |
908 | return PTR_ERR(data); | |
909 | ||
910 | return sprintf(buf, "%d\n", data->set_out); | |
911 | } | |
912 | ||
251f65cd JL |
913 | static ssize_t pwm1_store(struct device *dev, struct device_attribute *da, |
914 | const char *buf, size_t count) | |
594fbe71 AE |
915 | { |
916 | unsigned long val; | |
917 | int ret; | |
918 | ||
919 | if (kstrtoul(buf, 10, &val)) | |
920 | return -EINVAL; | |
921 | ||
922 | ret = do_set_pwm(dev, val); | |
923 | if (ret < 0) | |
924 | return ret; | |
925 | ||
926 | return count; | |
927 | } | |
928 | ||
929 | /* | |
930 | * Read and write function for fan1_target sysfs file. Get/set the fan speed in | |
931 | * closed-loop mode. Speed is given as a RPM value; then the chip will regulate | |
932 | * the fan speed using pulses from fan tachometer. | |
933 | * | |
934 | * Refer to rpm_from_cnt() implementation above to get info about count number | |
935 | * calculation. | |
936 | * | |
937 | * Also note that due to rounding errors it is possible that you don't read | |
938 | * back exactly the value you have set. | |
939 | */ | |
251f65cd JL |
940 | static ssize_t fan1_target_show(struct device *dev, |
941 | struct device_attribute *da, char *buf) | |
594fbe71 AE |
942 | { |
943 | struct g762_data *data = g762_update_client(dev); | |
944 | unsigned int rpm; | |
945 | ||
946 | if (IS_ERR(data)) | |
947 | return PTR_ERR(data); | |
948 | ||
949 | mutex_lock(&data->update_lock); | |
950 | rpm = rpm_from_cnt(data->set_cnt, data->clk_freq, | |
951 | G762_PULSE_FROM_REG(data->fan_cmd1), | |
952 | G762_CLKDIV_FROM_REG(data->fan_cmd1), | |
953 | G762_GEARMULT_FROM_REG(data->fan_cmd2)); | |
954 | mutex_unlock(&data->update_lock); | |
955 | ||
956 | return sprintf(buf, "%u\n", rpm); | |
957 | } | |
958 | ||
251f65cd JL |
959 | static ssize_t fan1_target_store(struct device *dev, |
960 | struct device_attribute *da, const char *buf, | |
961 | size_t count) | |
594fbe71 AE |
962 | { |
963 | unsigned long val; | |
964 | int ret; | |
965 | ||
966 | if (kstrtoul(buf, 10, &val)) | |
967 | return -EINVAL; | |
968 | ||
969 | ret = do_set_fan_target(dev, val); | |
970 | if (ret < 0) | |
971 | return ret; | |
972 | ||
973 | return count; | |
974 | } | |
975 | ||
976 | /* read function for fan1_fault sysfs file. */ | |
251f65cd | 977 | static ssize_t fan1_fault_show(struct device *dev, struct device_attribute *da, |
594fbe71 AE |
978 | char *buf) |
979 | { | |
980 | struct g762_data *data = g762_update_client(dev); | |
981 | ||
982 | if (IS_ERR(data)) | |
983 | return PTR_ERR(data); | |
984 | ||
985 | return sprintf(buf, "%u\n", !!(data->fan_sta & G762_REG_FAN_STA_FAIL)); | |
986 | } | |
987 | ||
988 | /* | |
989 | * read function for fan1_alarm sysfs file. Note that OOC condition is | |
990 | * enabled low | |
991 | */ | |
251f65cd JL |
992 | static ssize_t fan1_alarm_show(struct device *dev, |
993 | struct device_attribute *da, char *buf) | |
594fbe71 AE |
994 | { |
995 | struct g762_data *data = g762_update_client(dev); | |
996 | ||
997 | if (IS_ERR(data)) | |
998 | return PTR_ERR(data); | |
999 | ||
1000 | return sprintf(buf, "%u\n", !(data->fan_sta & G762_REG_FAN_STA_OOC)); | |
1001 | } | |
1002 | ||
251f65cd JL |
1003 | static DEVICE_ATTR_RW(pwm1); |
1004 | static DEVICE_ATTR_RW(pwm1_mode); | |
1005 | static DEVICE_ATTR_RW(pwm1_enable); | |
1006 | static DEVICE_ATTR_RO(fan1_input); | |
1007 | static DEVICE_ATTR_RO(fan1_alarm); | |
1008 | static DEVICE_ATTR_RO(fan1_fault); | |
1009 | static DEVICE_ATTR_RW(fan1_target); | |
1010 | static DEVICE_ATTR_RW(fan1_div); | |
1011 | static DEVICE_ATTR_RW(fan1_pulses); | |
594fbe71 AE |
1012 | |
1013 | /* Driver data */ | |
398e16db | 1014 | static struct attribute *g762_attrs[] = { |
594fbe71 AE |
1015 | &dev_attr_fan1_input.attr, |
1016 | &dev_attr_fan1_alarm.attr, | |
1017 | &dev_attr_fan1_fault.attr, | |
1018 | &dev_attr_fan1_target.attr, | |
1019 | &dev_attr_fan1_div.attr, | |
1020 | &dev_attr_fan1_pulses.attr, | |
1021 | &dev_attr_pwm1.attr, | |
1022 | &dev_attr_pwm1_mode.attr, | |
1023 | &dev_attr_pwm1_enable.attr, | |
1024 | NULL | |
1025 | }; | |
1026 | ||
398e16db | 1027 | ATTRIBUTE_GROUPS(g762); |
594fbe71 AE |
1028 | |
1029 | /* | |
1030 | * Enable both fan failure detection and fan out of control protection. The | |
1031 | * function does not protect change/access to data structure; it must thus | |
1032 | * only be called during initialization. | |
1033 | */ | |
1034 | static inline int g762_fan_init(struct device *dev) | |
1035 | { | |
594fbe71 AE |
1036 | struct g762_data *data = g762_update_client(dev); |
1037 | ||
1038 | if (IS_ERR(data)) | |
1039 | return PTR_ERR(data); | |
1040 | ||
1041 | data->fan_cmd1 |= G762_REG_FAN_CMD1_DET_FAN_FAIL; | |
1042 | data->fan_cmd1 |= G762_REG_FAN_CMD1_DET_FAN_OOC; | |
1043 | data->valid = false; | |
1044 | ||
398e16db | 1045 | return i2c_smbus_write_byte_data(data->client, G762_REG_FAN_CMD1, |
594fbe71 AE |
1046 | data->fan_cmd1); |
1047 | } | |
1048 | ||
1049 | static int g762_probe(struct i2c_client *client, const struct i2c_device_id *id) | |
1050 | { | |
398e16db | 1051 | struct device *dev = &client->dev; |
47591baa | 1052 | struct device *hwmon_dev; |
594fbe71 AE |
1053 | struct g762_data *data; |
1054 | int ret; | |
1055 | ||
1056 | if (!i2c_check_functionality(client->adapter, | |
1057 | I2C_FUNC_SMBUS_BYTE_DATA)) | |
1058 | return -ENODEV; | |
1059 | ||
398e16db | 1060 | data = devm_kzalloc(dev, sizeof(struct g762_data), GFP_KERNEL); |
594fbe71 AE |
1061 | if (!data) |
1062 | return -ENOMEM; | |
1063 | ||
1064 | i2c_set_clientdata(client, data); | |
1065 | data->client = client; | |
1066 | mutex_init(&data->update_lock); | |
1067 | ||
1068 | /* Enable fan failure detection and fan out of control protection */ | |
398e16db | 1069 | ret = g762_fan_init(dev); |
594fbe71 AE |
1070 | if (ret) |
1071 | return ret; | |
1072 | ||
1073 | /* Get configuration via DT ... */ | |
1074 | ret = g762_of_clock_enable(client); | |
1075 | if (ret) | |
1076 | return ret; | |
1077 | ret = g762_of_prop_import(client); | |
1078 | if (ret) | |
47591baa | 1079 | return ret; |
594fbe71 AE |
1080 | /* ... or platform_data */ |
1081 | ret = g762_pdata_prop_import(client); | |
1082 | if (ret) | |
47591baa | 1083 | return ret; |
594fbe71 | 1084 | |
47591baa | 1085 | hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, |
6b19b660 | 1086 | data, g762_groups); |
47591baa | 1087 | return PTR_ERR_OR_ZERO(hwmon_dev); |
594fbe71 AE |
1088 | } |
1089 | ||
1090 | static struct i2c_driver g762_driver = { | |
1091 | .driver = { | |
1092 | .name = DRVNAME, | |
594fbe71 AE |
1093 | .of_match_table = of_match_ptr(g762_dt_match), |
1094 | }, | |
1095 | .probe = g762_probe, | |
594fbe71 AE |
1096 | .id_table = g762_id, |
1097 | }; | |
1098 | ||
1099 | module_i2c_driver(g762_driver); | |
1100 | ||
1101 | MODULE_AUTHOR("Arnaud EBALARD <arno@natisbad.org>"); | |
1102 | MODULE_DESCRIPTION("GMT G762/G763 driver"); | |
1103 | MODULE_LICENSE("GPL"); |