1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * HiSilicon thermal sensor driver |
4 | * |
5 | * Copyright (c) 2014-2015 HiSilicon Limited. |
6 | * Copyright (c) 2014-2015 Linaro Limited. |
7 | * |
8 | * Xinwei Kong <kong.kongxinwei@hisilicon.com> |
9 | * Leo Yan <leo.yan@linaro.org> |
10 | */ |
11 | |
12 | #include <linux/cpufreq.h> |
13 | #include <linux/delay.h> |
14 | #include <linux/interrupt.h> |
15 | #include <linux/module.h> |
16 | #include <linux/of.h> |
17 | #include <linux/platform_device.h> |
18 | #include <linux/io.h> |
19 | #include <linux/thermal.h> |
20 | |
21 | #define HI6220_TEMP0_LAG (0x0) |
22 | #define HI6220_TEMP0_TH (0x4) |
23 | #define HI6220_TEMP0_RST_TH (0x8) |
24 | #define HI6220_TEMP0_CFG (0xC) |
25 | #define HI6220_TEMP0_CFG_SS_MSK (0xF000) |
26 | #define HI6220_TEMP0_CFG_HDAK_MSK (0x30) |
27 | #define HI6220_TEMP0_EN (0x10) |
28 | #define HI6220_TEMP0_INT_EN (0x14) |
29 | #define HI6220_TEMP0_INT_CLR (0x18) |
30 | #define HI6220_TEMP0_RST_MSK (0x1C) |
31 | #define HI6220_TEMP0_VALUE (0x28) |
32 | |
33 | #define HI3660_OFFSET(chan) ((chan) * 0x40) |
34 | #define HI3660_TEMP(chan) (HI3660_OFFSET(chan) + 0x1C) |
35 | #define HI3660_TH(chan) (HI3660_OFFSET(chan) + 0x20) |
36 | #define HI3660_LAG(chan) (HI3660_OFFSET(chan) + 0x28) |
37 | #define HI3660_INT_EN(chan) (HI3660_OFFSET(chan) + 0x2C) |
38 | #define HI3660_INT_CLR(chan) (HI3660_OFFSET(chan) + 0x30) |
39 | |
40 | #define HI6220_TEMP_BASE (-60000) |
41 | #define HI6220_TEMP_RESET (100000) |
42 | #define HI6220_TEMP_STEP (785) |
43 | #define HI6220_TEMP_LAG (3500) |
44 | |
45 | #define HI3660_TEMP_BASE (-63780) |
46 | #define HI3660_TEMP_STEP (205) |
47 | #define HI3660_TEMP_LAG (4000) |
48 | |
49 | #define HI6220_CLUSTER0_SENSOR 2 |
50 | #define HI6220_CLUSTER1_SENSOR 1 |
51 | |
52 | #define HI3660_LITTLE_SENSOR 0 |
53 | #define HI3660_BIG_SENSOR 1 |
54 | #define HI3660_G3D_SENSOR 2 |
55 | #define HI3660_MODEM_SENSOR 3 |
56 | |
57 | struct hisi_thermal_data; |
58 | |
59 | struct hisi_thermal_sensor { |
60 | struct hisi_thermal_data *data; |
61 | struct thermal_zone_device *tzd; |
62 | const char *irq_name; |
63 | uint32_t id; |
64 | uint32_t thres_temp; |
65 | }; |
66 | |
67 | struct hisi_thermal_ops { |
68 | int (*get_temp)(struct hisi_thermal_sensor *sensor); |
69 | int (*enable_sensor)(struct hisi_thermal_sensor *sensor); |
70 | int (*disable_sensor)(struct hisi_thermal_sensor *sensor); |
71 | int (*irq_handler)(struct hisi_thermal_sensor *sensor); |
72 | int (*probe)(struct hisi_thermal_data *data); |
73 | }; |
74 | |
75 | struct hisi_thermal_data { |
76 | const struct hisi_thermal_ops *ops; |
77 | struct hisi_thermal_sensor *sensor; |
78 | struct platform_device *pdev; |
79 | struct clk *clk; |
80 | void __iomem *regs; |
81 | int nr_sensors; |
82 | }; |
83 | |
84 | /* |
85 | * The temperature computation on the tsensor is as follow: |
86 | * Unit: millidegree Celsius |
87 | * Step: 200/255 (0.7843) |
88 | * Temperature base: -60°C |
89 | * |
90 | * The register is programmed in temperature steps, every step is 785 |
91 | * millidegree and begins at -60 000 m°C |
92 | * |
93 | * The temperature from the steps: |
94 | * |
95 | * Temp = TempBase + (steps x 785) |
96 | * |
97 | * and the steps from the temperature: |
98 | * |
99 | * steps = (Temp - TempBase) / 785 |
100 | * |
101 | */ |
102 | static inline int hi6220_thermal_step_to_temp(int step) |
103 | { |
104 | return HI6220_TEMP_BASE + (step * HI6220_TEMP_STEP); |
105 | } |
106 | |
107 | static inline int hi6220_thermal_temp_to_step(int temp) |
108 | { |
109 | return DIV_ROUND_UP(temp - HI6220_TEMP_BASE, HI6220_TEMP_STEP); |
110 | } |
111 | |
112 | /* |
113 | * for Hi3660, |
114 | * Step: 189/922 (0.205) |
115 | * Temperature base: -63.780°C |
116 | * |
117 | * The register is programmed in temperature steps, every step is 205 |
118 | * millidegree and begins at -63 780 m°C |
119 | */ |
120 | static inline int hi3660_thermal_step_to_temp(int step) |
121 | { |
122 | return HI3660_TEMP_BASE + step * HI3660_TEMP_STEP; |
123 | } |
124 | |
125 | static inline int hi3660_thermal_temp_to_step(int temp) |
126 | { |
127 | return DIV_ROUND_UP(temp - HI3660_TEMP_BASE, HI3660_TEMP_STEP); |
128 | } |
129 | |
130 | /* |
131 | * The lag register contains 5 bits encoding the temperature in steps. |
132 | * |
133 | * Each time the temperature crosses the threshold boundary, an |
134 | * interrupt is raised. It could be when the temperature is going |
135 | * above the threshold or below. However, if the temperature is |
136 | * fluctuating around this value due to the load, we can receive |
137 | * several interrupts which may not desired. |
138 | * |
139 | * We can setup a temperature representing the delta between the |
140 | * threshold and the current temperature when the temperature is |
141 | * decreasing. |
142 | * |
143 | * For instance: the lag register is 5°C, the threshold is 65°C, when |
144 | * the temperature reaches 65°C an interrupt is raised and when the |
145 | * temperature decrease to 65°C - 5°C another interrupt is raised. |
146 | * |
147 | * A very short lag can lead to an interrupt storm, a long lag |
148 | * increase the latency to react to the temperature changes. In our |
149 | * case, that is not really a problem as we are polling the |
150 | * temperature. |
151 | * |
152 | * [0:4] : lag register |
153 | * |
154 | * The temperature is coded in steps, cf. HI6220_TEMP_STEP. |
155 | * |
156 | * Min : 0x00 : 0.0 °C |
157 | * Max : 0x1F : 24.3 °C |
158 | * |
159 | * The 'value' parameter is in milliCelsius. |
160 | */ |
161 | static inline void hi6220_thermal_set_lag(void __iomem *addr, int value) |
162 | { |
163 | writel(DIV_ROUND_UP(value, HI6220_TEMP_STEP) & 0x1F, |
164 | addr: addr + HI6220_TEMP0_LAG); |
165 | } |
166 | |
167 | static inline void hi6220_thermal_alarm_clear(void __iomem *addr, int value) |
168 | { |
169 | writel(val: value, addr: addr + HI6220_TEMP0_INT_CLR); |
170 | } |
171 | |
172 | static inline void hi6220_thermal_alarm_enable(void __iomem *addr, int value) |
173 | { |
174 | writel(val: value, addr: addr + HI6220_TEMP0_INT_EN); |
175 | } |
176 | |
177 | static inline void hi6220_thermal_alarm_set(void __iomem *addr, int temp) |
178 | { |
179 | writel(val: hi6220_thermal_temp_to_step(temp) | 0x0FFFFFF00, |
180 | addr: addr + HI6220_TEMP0_TH); |
181 | } |
182 | |
183 | static inline void hi6220_thermal_reset_set(void __iomem *addr, int temp) |
184 | { |
185 | writel(val: hi6220_thermal_temp_to_step(temp), addr: addr + HI6220_TEMP0_RST_TH); |
186 | } |
187 | |
188 | static inline void hi6220_thermal_reset_enable(void __iomem *addr, int value) |
189 | { |
190 | writel(val: value, addr: addr + HI6220_TEMP0_RST_MSK); |
191 | } |
192 | |
193 | static inline void hi6220_thermal_enable(void __iomem *addr, int value) |
194 | { |
195 | writel(val: value, addr: addr + HI6220_TEMP0_EN); |
196 | } |
197 | |
198 | static inline int hi6220_thermal_get_temperature(void __iomem *addr) |
199 | { |
200 | return hi6220_thermal_step_to_temp(readl(addr: addr + HI6220_TEMP0_VALUE)); |
201 | } |
202 | |
203 | /* |
204 | * [0:6] lag register |
205 | * |
206 | * The temperature is coded in steps, cf. HI3660_TEMP_STEP. |
207 | * |
208 | * Min : 0x00 : 0.0 °C |
209 | * Max : 0x7F : 26.0 °C |
210 | * |
211 | */ |
212 | static inline void hi3660_thermal_set_lag(void __iomem *addr, |
213 | int id, int value) |
214 | { |
215 | writel(DIV_ROUND_UP(value, HI3660_TEMP_STEP) & 0x7F, |
216 | addr: addr + HI3660_LAG(id)); |
217 | } |
218 | |
219 | static inline void hi3660_thermal_alarm_clear(void __iomem *addr, |
220 | int id, int value) |
221 | { |
222 | writel(val: value, addr: addr + HI3660_INT_CLR(id)); |
223 | } |
224 | |
225 | static inline void hi3660_thermal_alarm_enable(void __iomem *addr, |
226 | int id, int value) |
227 | { |
228 | writel(val: value, addr: addr + HI3660_INT_EN(id)); |
229 | } |
230 | |
231 | static inline void hi3660_thermal_alarm_set(void __iomem *addr, |
232 | int id, int value) |
233 | { |
234 | writel(val: value, addr: addr + HI3660_TH(id)); |
235 | } |
236 | |
237 | static inline int hi3660_thermal_get_temperature(void __iomem *addr, int id) |
238 | { |
239 | return hi3660_thermal_step_to_temp(readl(addr: addr + HI3660_TEMP(id))); |
240 | } |
241 | |
242 | /* |
243 | * Temperature configuration register - Sensor selection |
244 | * |
245 | * Bits [19:12] |
246 | * |
247 | * 0x0: local sensor (default) |
248 | * 0x1: remote sensor 1 (ACPU cluster 1) |
249 | * 0x2: remote sensor 2 (ACPU cluster 0) |
250 | * 0x3: remote sensor 3 (G3D) |
251 | */ |
252 | static inline void hi6220_thermal_sensor_select(void __iomem *addr, int sensor) |
253 | { |
254 | writel(val: (readl(addr: addr + HI6220_TEMP0_CFG) & ~HI6220_TEMP0_CFG_SS_MSK) | |
255 | (sensor << 12), addr: addr + HI6220_TEMP0_CFG); |
256 | } |
257 | |
258 | /* |
259 | * Temperature configuration register - Hdak conversion polling interval |
260 | * |
261 | * Bits [5:4] |
262 | * |
263 | * 0x0 : 0.768 ms |
264 | * 0x1 : 6.144 ms |
265 | * 0x2 : 49.152 ms |
266 | * 0x3 : 393.216 ms |
267 | */ |
268 | static inline void hi6220_thermal_hdak_set(void __iomem *addr, int value) |
269 | { |
270 | writel(val: (readl(addr: addr + HI6220_TEMP0_CFG) & ~HI6220_TEMP0_CFG_HDAK_MSK) | |
271 | (value << 4), addr: addr + HI6220_TEMP0_CFG); |
272 | } |
273 | |
274 | static int hi6220_thermal_irq_handler(struct hisi_thermal_sensor *sensor) |
275 | { |
276 | struct hisi_thermal_data *data = sensor->data; |
277 | |
278 | hi6220_thermal_alarm_clear(addr: data->regs, value: 1); |
279 | return 0; |
280 | } |
281 | |
282 | static int hi3660_thermal_irq_handler(struct hisi_thermal_sensor *sensor) |
283 | { |
284 | struct hisi_thermal_data *data = sensor->data; |
285 | |
286 | hi3660_thermal_alarm_clear(addr: data->regs, id: sensor->id, value: 1); |
287 | return 0; |
288 | } |
289 | |
290 | static int hi6220_thermal_get_temp(struct hisi_thermal_sensor *sensor) |
291 | { |
292 | struct hisi_thermal_data *data = sensor->data; |
293 | |
294 | return hi6220_thermal_get_temperature(addr: data->regs); |
295 | } |
296 | |
297 | static int hi3660_thermal_get_temp(struct hisi_thermal_sensor *sensor) |
298 | { |
299 | struct hisi_thermal_data *data = sensor->data; |
300 | |
301 | return hi3660_thermal_get_temperature(addr: data->regs, id: sensor->id); |
302 | } |
303 | |
304 | static int hi6220_thermal_disable_sensor(struct hisi_thermal_sensor *sensor) |
305 | { |
306 | struct hisi_thermal_data *data = sensor->data; |
307 | |
308 | /* disable sensor module */ |
309 | hi6220_thermal_enable(addr: data->regs, value: 0); |
310 | hi6220_thermal_alarm_enable(addr: data->regs, value: 0); |
311 | hi6220_thermal_reset_enable(addr: data->regs, value: 0); |
312 | |
313 | clk_disable_unprepare(clk: data->clk); |
314 | |
315 | return 0; |
316 | } |
317 | |
318 | static int hi3660_thermal_disable_sensor(struct hisi_thermal_sensor *sensor) |
319 | { |
320 | struct hisi_thermal_data *data = sensor->data; |
321 | |
322 | /* disable sensor module */ |
323 | hi3660_thermal_alarm_enable(addr: data->regs, id: sensor->id, value: 0); |
324 | return 0; |
325 | } |
326 | |
327 | static int hi6220_thermal_enable_sensor(struct hisi_thermal_sensor *sensor) |
328 | { |
329 | struct hisi_thermal_data *data = sensor->data; |
330 | int ret; |
331 | |
332 | /* enable clock for tsensor */ |
333 | ret = clk_prepare_enable(clk: data->clk); |
334 | if (ret) |
335 | return ret; |
336 | |
337 | /* disable module firstly */ |
338 | hi6220_thermal_reset_enable(addr: data->regs, value: 0); |
339 | hi6220_thermal_enable(addr: data->regs, value: 0); |
340 | |
341 | /* select sensor id */ |
342 | hi6220_thermal_sensor_select(addr: data->regs, sensor: sensor->id); |
343 | |
344 | /* setting the hdak time */ |
345 | hi6220_thermal_hdak_set(addr: data->regs, value: 0); |
346 | |
347 | /* setting lag value between current temp and the threshold */ |
348 | hi6220_thermal_set_lag(addr: data->regs, HI6220_TEMP_LAG); |
349 | |
350 | /* enable for interrupt */ |
351 | hi6220_thermal_alarm_set(addr: data->regs, temp: sensor->thres_temp); |
352 | |
353 | hi6220_thermal_reset_set(addr: data->regs, HI6220_TEMP_RESET); |
354 | |
355 | /* enable module */ |
356 | hi6220_thermal_reset_enable(addr: data->regs, value: 1); |
357 | hi6220_thermal_enable(addr: data->regs, value: 1); |
358 | |
359 | hi6220_thermal_alarm_clear(addr: data->regs, value: 0); |
360 | hi6220_thermal_alarm_enable(addr: data->regs, value: 1); |
361 | |
362 | return 0; |
363 | } |
364 | |
365 | static int hi3660_thermal_enable_sensor(struct hisi_thermal_sensor *sensor) |
366 | { |
367 | unsigned int value; |
368 | struct hisi_thermal_data *data = sensor->data; |
369 | |
370 | /* disable interrupt */ |
371 | hi3660_thermal_alarm_enable(addr: data->regs, id: sensor->id, value: 0); |
372 | |
373 | /* setting lag value between current temp and the threshold */ |
374 | hi3660_thermal_set_lag(addr: data->regs, id: sensor->id, HI3660_TEMP_LAG); |
375 | |
376 | /* set interrupt threshold */ |
377 | value = hi3660_thermal_temp_to_step(temp: sensor->thres_temp); |
378 | hi3660_thermal_alarm_set(addr: data->regs, id: sensor->id, value); |
379 | |
380 | /* enable interrupt */ |
381 | hi3660_thermal_alarm_clear(addr: data->regs, id: sensor->id, value: 1); |
382 | hi3660_thermal_alarm_enable(addr: data->regs, id: sensor->id, value: 1); |
383 | |
384 | return 0; |
385 | } |
386 | |
387 | static int hi6220_thermal_probe(struct hisi_thermal_data *data) |
388 | { |
389 | struct platform_device *pdev = data->pdev; |
390 | struct device *dev = &pdev->dev; |
391 | int ret; |
392 | |
393 | data->clk = devm_clk_get(dev, id: "thermal_clk" ); |
394 | if (IS_ERR(ptr: data->clk)) { |
395 | ret = PTR_ERR(ptr: data->clk); |
396 | if (ret != -EPROBE_DEFER) |
397 | dev_err(dev, "failed to get thermal clk: %d\n" , ret); |
398 | return ret; |
399 | } |
400 | |
401 | data->sensor = devm_kzalloc(dev, size: sizeof(*data->sensor), GFP_KERNEL); |
402 | if (!data->sensor) |
403 | return -ENOMEM; |
404 | |
405 | data->sensor[0].id = HI6220_CLUSTER0_SENSOR; |
406 | data->sensor[0].irq_name = "tsensor_intr" ; |
407 | data->sensor[0].data = data; |
408 | data->nr_sensors = 1; |
409 | |
410 | return 0; |
411 | } |
412 | |
413 | static int hi3660_thermal_probe(struct hisi_thermal_data *data) |
414 | { |
415 | struct platform_device *pdev = data->pdev; |
416 | struct device *dev = &pdev->dev; |
417 | |
418 | data->nr_sensors = 1; |
419 | |
420 | data->sensor = devm_kzalloc(dev, size: sizeof(*data->sensor) * |
421 | data->nr_sensors, GFP_KERNEL); |
422 | if (!data->sensor) |
423 | return -ENOMEM; |
424 | |
425 | data->sensor[0].id = HI3660_BIG_SENSOR; |
426 | data->sensor[0].irq_name = "tsensor_a73" ; |
427 | data->sensor[0].data = data; |
428 | |
429 | return 0; |
430 | } |
431 | |
432 | static int hisi_thermal_get_temp(struct thermal_zone_device *tz, int *temp) |
433 | { |
434 | struct hisi_thermal_sensor *sensor = thermal_zone_device_priv(tzd: tz); |
435 | struct hisi_thermal_data *data = sensor->data; |
436 | |
437 | *temp = data->ops->get_temp(sensor); |
438 | |
439 | return 0; |
440 | } |
441 | |
442 | static const struct thermal_zone_device_ops hisi_of_thermal_ops = { |
443 | .get_temp = hisi_thermal_get_temp, |
444 | }; |
445 | |
446 | static irqreturn_t hisi_thermal_alarm_irq_thread(int irq, void *dev) |
447 | { |
448 | struct hisi_thermal_sensor *sensor = dev; |
449 | struct hisi_thermal_data *data = sensor->data; |
450 | int temp = 0; |
451 | |
452 | data->ops->irq_handler(sensor); |
453 | |
454 | temp = data->ops->get_temp(sensor); |
455 | |
456 | if (temp >= sensor->thres_temp) { |
457 | dev_crit(&data->pdev->dev, |
458 | "sensor <%d> THERMAL ALARM: %d > %d\n" , |
459 | sensor->id, temp, sensor->thres_temp); |
460 | |
461 | thermal_zone_device_update(sensor->tzd, |
462 | THERMAL_EVENT_UNSPECIFIED); |
463 | |
464 | } else { |
465 | dev_crit(&data->pdev->dev, |
466 | "sensor <%d> THERMAL ALARM stopped: %d < %d\n" , |
467 | sensor->id, temp, sensor->thres_temp); |
468 | } |
469 | |
470 | return IRQ_HANDLED; |
471 | } |
472 | |
473 | static int hisi_thermal_register_sensor(struct platform_device *pdev, |
474 | struct hisi_thermal_sensor *sensor) |
475 | { |
476 | int ret, i; |
477 | struct thermal_trip trip; |
478 | |
479 | sensor->tzd = devm_thermal_of_zone_register(dev: &pdev->dev, |
480 | id: sensor->id, data: sensor, |
481 | ops: &hisi_of_thermal_ops); |
482 | if (IS_ERR(ptr: sensor->tzd)) { |
483 | ret = PTR_ERR(ptr: sensor->tzd); |
484 | sensor->tzd = NULL; |
485 | dev_err(&pdev->dev, "failed to register sensor id %d: %d\n" , |
486 | sensor->id, ret); |
487 | return ret; |
488 | } |
489 | |
490 | for (i = 0; i < thermal_zone_get_num_trips(tz: sensor->tzd); i++) { |
491 | |
492 | thermal_zone_get_trip(tz: sensor->tzd, trip_id: i, trip: &trip); |
493 | |
494 | if (trip.type == THERMAL_TRIP_PASSIVE) { |
495 | sensor->thres_temp = trip.temperature; |
496 | break; |
497 | } |
498 | } |
499 | |
500 | return 0; |
501 | } |
502 | |
503 | static const struct hisi_thermal_ops hi6220_ops = { |
504 | .get_temp = hi6220_thermal_get_temp, |
505 | .enable_sensor = hi6220_thermal_enable_sensor, |
506 | .disable_sensor = hi6220_thermal_disable_sensor, |
507 | .irq_handler = hi6220_thermal_irq_handler, |
508 | .probe = hi6220_thermal_probe, |
509 | }; |
510 | |
511 | static const struct hisi_thermal_ops hi3660_ops = { |
512 | .get_temp = hi3660_thermal_get_temp, |
513 | .enable_sensor = hi3660_thermal_enable_sensor, |
514 | .disable_sensor = hi3660_thermal_disable_sensor, |
515 | .irq_handler = hi3660_thermal_irq_handler, |
516 | .probe = hi3660_thermal_probe, |
517 | }; |
518 | |
519 | static const struct of_device_id of_hisi_thermal_match[] = { |
520 | { |
521 | .compatible = "hisilicon,tsensor" , |
522 | .data = &hi6220_ops, |
523 | }, |
524 | { |
525 | .compatible = "hisilicon,hi3660-tsensor" , |
526 | .data = &hi3660_ops, |
527 | }, |
528 | { /* end */ } |
529 | }; |
530 | MODULE_DEVICE_TABLE(of, of_hisi_thermal_match); |
531 | |
532 | static void hisi_thermal_toggle_sensor(struct hisi_thermal_sensor *sensor, |
533 | bool on) |
534 | { |
535 | struct thermal_zone_device *tzd = sensor->tzd; |
536 | |
537 | if (on) |
538 | thermal_zone_device_enable(tz: tzd); |
539 | else |
540 | thermal_zone_device_disable(tz: tzd); |
541 | } |
542 | |
543 | static int hisi_thermal_probe(struct platform_device *pdev) |
544 | { |
545 | struct hisi_thermal_data *data; |
546 | struct device *dev = &pdev->dev; |
547 | int i, ret; |
548 | |
549 | data = devm_kzalloc(dev, size: sizeof(*data), GFP_KERNEL); |
550 | if (!data) |
551 | return -ENOMEM; |
552 | |
553 | data->pdev = pdev; |
554 | platform_set_drvdata(pdev, data); |
555 | data->ops = of_device_get_match_data(dev); |
556 | |
557 | data->regs = devm_platform_ioremap_resource(pdev, index: 0); |
558 | if (IS_ERR(ptr: data->regs)) |
559 | return PTR_ERR(ptr: data->regs); |
560 | |
561 | ret = data->ops->probe(data); |
562 | if (ret) |
563 | return ret; |
564 | |
565 | for (i = 0; i < data->nr_sensors; i++) { |
566 | struct hisi_thermal_sensor *sensor = &data->sensor[i]; |
567 | |
568 | ret = hisi_thermal_register_sensor(pdev, sensor); |
569 | if (ret) { |
570 | dev_err(dev, "failed to register thermal sensor: %d\n" , |
571 | ret); |
572 | return ret; |
573 | } |
574 | |
575 | ret = platform_get_irq(pdev, 0); |
576 | if (ret < 0) |
577 | return ret; |
578 | |
579 | ret = devm_request_threaded_irq(dev, irq: ret, NULL, |
580 | thread_fn: hisi_thermal_alarm_irq_thread, |
581 | IRQF_ONESHOT, devname: sensor->irq_name, |
582 | dev_id: sensor); |
583 | if (ret < 0) { |
584 | dev_err(dev, "Failed to request alarm irq: %d\n" , ret); |
585 | return ret; |
586 | } |
587 | |
588 | ret = data->ops->enable_sensor(sensor); |
589 | if (ret) { |
590 | dev_err(dev, "Failed to setup the sensor: %d\n" , ret); |
591 | return ret; |
592 | } |
593 | |
594 | hisi_thermal_toggle_sensor(sensor, on: true); |
595 | } |
596 | |
597 | return 0; |
598 | } |
599 | |
600 | static void hisi_thermal_remove(struct platform_device *pdev) |
601 | { |
602 | struct hisi_thermal_data *data = platform_get_drvdata(pdev); |
603 | int i; |
604 | |
605 | for (i = 0; i < data->nr_sensors; i++) { |
606 | struct hisi_thermal_sensor *sensor = &data->sensor[i]; |
607 | |
608 | hisi_thermal_toggle_sensor(sensor, on: false); |
609 | data->ops->disable_sensor(sensor); |
610 | } |
611 | } |
612 | |
613 | static int hisi_thermal_suspend(struct device *dev) |
614 | { |
615 | struct hisi_thermal_data *data = dev_get_drvdata(dev); |
616 | int i; |
617 | |
618 | for (i = 0; i < data->nr_sensors; i++) |
619 | data->ops->disable_sensor(&data->sensor[i]); |
620 | |
621 | return 0; |
622 | } |
623 | |
624 | static int hisi_thermal_resume(struct device *dev) |
625 | { |
626 | struct hisi_thermal_data *data = dev_get_drvdata(dev); |
627 | int i, ret = 0; |
628 | |
629 | for (i = 0; i < data->nr_sensors; i++) |
630 | ret |= data->ops->enable_sensor(&data->sensor[i]); |
631 | |
632 | return ret; |
633 | } |
634 | |
635 | static DEFINE_SIMPLE_DEV_PM_OPS(hisi_thermal_pm_ops, |
636 | hisi_thermal_suspend, hisi_thermal_resume); |
637 | |
638 | static struct platform_driver hisi_thermal_driver = { |
639 | .driver = { |
640 | .name = "hisi_thermal" , |
641 | .pm = pm_sleep_ptr(&hisi_thermal_pm_ops), |
642 | .of_match_table = of_hisi_thermal_match, |
643 | }, |
644 | .probe = hisi_thermal_probe, |
645 | .remove_new = hisi_thermal_remove, |
646 | }; |
647 | |
648 | module_platform_driver(hisi_thermal_driver); |
649 | |
650 | MODULE_AUTHOR("Xinwei Kong <kong.kongxinwei@hisilicon.com>" ); |
651 | MODULE_AUTHOR("Leo Yan <leo.yan@linaro.org>" ); |
652 | MODULE_DESCRIPTION("HiSilicon thermal driver" ); |
653 | MODULE_LICENSE("GPL v2" ); |
654 | |