Commit | Line | Data |
---|---|---|
cbac8f63 CW |
1 | /* |
2 | * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms and conditions of the GNU General Public License, | |
6 | * version 2, as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | */ | |
13 | ||
14 | #include <linux/clk.h> | |
15 | #include <linux/delay.h> | |
16 | #include <linux/interrupt.h> | |
17 | #include <linux/io.h> | |
18 | #include <linux/module.h> | |
19 | #include <linux/of.h> | |
20 | #include <linux/of_address.h> | |
21 | #include <linux/of_irq.h> | |
22 | #include <linux/platform_device.h> | |
23 | #include <linux/reset.h> | |
24 | #include <linux/thermal.h> | |
c970872e | 25 | #include <linux/pinctrl/consumer.h> |
cbac8f63 CW |
26 | |
27 | /** | |
28 | * If the temperature over a period of time High, | |
29 | * the resulting TSHUT gave CRU module,let it reset the entire chip, | |
30 | * or via GPIO give PMIC. | |
31 | */ | |
32 | enum tshut_mode { | |
33 | TSHUT_MODE_CRU = 0, | |
34 | TSHUT_MODE_GPIO, | |
35 | }; | |
36 | ||
37 | /** | |
38 | * the system Temperature Sensors tshut(tshut) polarity | |
39 | * the bit 8 is tshut polarity. | |
40 | * 0: low active, 1: high active | |
41 | */ | |
42 | enum tshut_polarity { | |
43 | TSHUT_LOW_ACTIVE = 0, | |
44 | TSHUT_HIGH_ACTIVE, | |
45 | }; | |
46 | ||
47 | /** | |
48 | * The system has three Temperature Sensors. channel 0 is reserved, | |
49 | * channel 1 is for CPU, and channel 2 is for GPU. | |
50 | */ | |
51 | enum sensor_id { | |
52 | SENSOR_CPU = 1, | |
53 | SENSOR_GPU, | |
54 | }; | |
55 | ||
56 | struct rockchip_tsadc_chip { | |
57 | /* The hardware-controlled tshut property */ | |
58 | long tshut_temp; | |
59 | enum tshut_mode tshut_mode; | |
60 | enum tshut_polarity tshut_polarity; | |
61 | ||
62 | /* Chip-wide methods */ | |
63 | void (*initialize)(void __iomem *reg, enum tshut_polarity p); | |
64 | void (*irq_ack)(void __iomem *reg); | |
65 | void (*control)(void __iomem *reg, bool on); | |
66 | ||
67 | /* Per-sensor methods */ | |
17e8351a | 68 | int (*get_temp)(int chn, void __iomem *reg, int *temp); |
cbac8f63 CW |
69 | void (*set_tshut_temp)(int chn, void __iomem *reg, long temp); |
70 | void (*set_tshut_mode)(int chn, void __iomem *reg, enum tshut_mode m); | |
71 | }; | |
72 | ||
73 | struct rockchip_thermal_sensor { | |
74 | struct rockchip_thermal_data *thermal; | |
75 | struct thermal_zone_device *tzd; | |
76 | enum sensor_id id; | |
77 | }; | |
78 | ||
79 | #define NUM_SENSORS 2 /* Ignore unused sensor 0 */ | |
80 | ||
81 | struct rockchip_thermal_data { | |
82 | const struct rockchip_tsadc_chip *chip; | |
83 | struct platform_device *pdev; | |
84 | struct reset_control *reset; | |
85 | ||
86 | struct rockchip_thermal_sensor sensors[NUM_SENSORS]; | |
87 | ||
88 | struct clk *clk; | |
89 | struct clk *pclk; | |
90 | ||
91 | void __iomem *regs; | |
92 | ||
93 | long tshut_temp; | |
94 | enum tshut_mode tshut_mode; | |
95 | enum tshut_polarity tshut_polarity; | |
96 | }; | |
97 | ||
98 | /* TSADC V2 Sensor info define: */ | |
99 | #define TSADCV2_AUTO_CON 0x04 | |
100 | #define TSADCV2_INT_EN 0x08 | |
101 | #define TSADCV2_INT_PD 0x0c | |
102 | #define TSADCV2_DATA(chn) (0x20 + (chn) * 0x04) | |
103 | #define TSADCV2_COMP_SHUT(chn) (0x40 + (chn) * 0x04) | |
104 | #define TSADCV2_HIGHT_INT_DEBOUNCE 0x60 | |
105 | #define TSADCV2_HIGHT_TSHUT_DEBOUNCE 0x64 | |
106 | #define TSADCV2_AUTO_PERIOD 0x68 | |
107 | #define TSADCV2_AUTO_PERIOD_HT 0x6c | |
108 | ||
109 | #define TSADCV2_AUTO_EN BIT(0) | |
cbac8f63 CW |
110 | #define TSADCV2_AUTO_SRC_EN(chn) BIT(4 + (chn)) |
111 | #define TSADCV2_AUTO_TSHUT_POLARITY_HIGH BIT(8) | |
cbac8f63 CW |
112 | |
113 | #define TSADCV2_INT_SRC_EN(chn) BIT(chn) | |
114 | #define TSADCV2_SHUT_2GPIO_SRC_EN(chn) BIT(4 + (chn)) | |
115 | #define TSADCV2_SHUT_2CRU_SRC_EN(chn) BIT(8 + (chn)) | |
116 | ||
452e01b3 | 117 | #define TSADCV2_INT_PD_CLEAR_MASK ~BIT(8) |
cbac8f63 CW |
118 | |
119 | #define TSADCV2_DATA_MASK 0xfff | |
120 | #define TSADCV2_HIGHT_INT_DEBOUNCE_COUNT 4 | |
121 | #define TSADCV2_HIGHT_TSHUT_DEBOUNCE_COUNT 4 | |
122 | #define TSADCV2_AUTO_PERIOD_TIME 250 /* msec */ | |
123 | #define TSADCV2_AUTO_PERIOD_HT_TIME 50 /* msec */ | |
124 | ||
125 | struct tsadc_table { | |
d9a241cb | 126 | u32 code; |
cbac8f63 CW |
127 | long temp; |
128 | }; | |
129 | ||
130 | static const struct tsadc_table v2_code_table[] = { | |
131 | {TSADCV2_DATA_MASK, -40000}, | |
132 | {3800, -40000}, | |
133 | {3792, -35000}, | |
134 | {3783, -30000}, | |
135 | {3774, -25000}, | |
136 | {3765, -20000}, | |
137 | {3756, -15000}, | |
138 | {3747, -10000}, | |
139 | {3737, -5000}, | |
140 | {3728, 0}, | |
141 | {3718, 5000}, | |
142 | {3708, 10000}, | |
143 | {3698, 15000}, | |
144 | {3688, 20000}, | |
145 | {3678, 25000}, | |
146 | {3667, 30000}, | |
147 | {3656, 35000}, | |
148 | {3645, 40000}, | |
149 | {3634, 45000}, | |
150 | {3623, 50000}, | |
151 | {3611, 55000}, | |
152 | {3600, 60000}, | |
153 | {3588, 65000}, | |
154 | {3575, 70000}, | |
155 | {3563, 75000}, | |
156 | {3550, 80000}, | |
157 | {3537, 85000}, | |
158 | {3524, 90000}, | |
159 | {3510, 95000}, | |
160 | {3496, 100000}, | |
161 | {3482, 105000}, | |
162 | {3467, 110000}, | |
163 | {3452, 115000}, | |
164 | {3437, 120000}, | |
165 | {3421, 125000}, | |
cbac8f63 CW |
166 | }; |
167 | ||
168 | static u32 rk_tsadcv2_temp_to_code(long temp) | |
169 | { | |
170 | int high, low, mid; | |
171 | ||
172 | low = 0; | |
173 | high = ARRAY_SIZE(v2_code_table) - 1; | |
174 | mid = (high + low) / 2; | |
175 | ||
176 | if (temp < v2_code_table[low].temp || temp > v2_code_table[high].temp) | |
177 | return 0; | |
178 | ||
179 | while (low <= high) { | |
180 | if (temp == v2_code_table[mid].temp) | |
181 | return v2_code_table[mid].code; | |
182 | else if (temp < v2_code_table[mid].temp) | |
183 | high = mid - 1; | |
184 | else | |
185 | low = mid + 1; | |
186 | mid = (low + high) / 2; | |
187 | } | |
188 | ||
189 | return 0; | |
190 | } | |
191 | ||
d9a241cb | 192 | static int rk_tsadcv2_code_to_temp(u32 code, int *temp) |
cbac8f63 | 193 | { |
d9a241cb | 194 | unsigned int low = 1; |
1e9a1aea CW |
195 | unsigned int high = ARRAY_SIZE(v2_code_table) - 1; |
196 | unsigned int mid = (low + high) / 2; | |
197 | unsigned int num; | |
198 | unsigned long denom; | |
199 | ||
d9a241cb | 200 | BUILD_BUG_ON(ARRAY_SIZE(v2_code_table) < 2); |
1e9a1aea | 201 | |
d9a241cb DT |
202 | code &= TSADCV2_DATA_MASK; |
203 | if (code < v2_code_table[high].code) | |
204 | return -EAGAIN; /* Incorrect reading */ | |
205 | ||
206 | while (low <= high) { | |
1e9a1aea CW |
207 | if (code >= v2_code_table[mid].code && |
208 | code < v2_code_table[mid - 1].code) | |
209 | break; | |
cbac8f63 CW |
210 | else if (code < v2_code_table[mid].code) |
211 | low = mid + 1; | |
212 | else | |
213 | high = mid - 1; | |
214 | mid = (low + high) / 2; | |
215 | } | |
216 | ||
1e9a1aea CW |
217 | /* |
218 | * The 5C granularity provided by the table is too much. Let's | |
219 | * assume that the relationship between sensor readings and | |
220 | * temperature between 2 table entries is linear and interpolate | |
221 | * to produce less granular result. | |
222 | */ | |
223 | num = v2_code_table[mid].temp - v2_code_table[mid - 1].temp; | |
224 | num *= v2_code_table[mid - 1].code - code; | |
225 | denom = v2_code_table[mid - 1].code - v2_code_table[mid].code; | |
d9a241cb DT |
226 | *temp = v2_code_table[mid - 1].temp + (num / denom); |
227 | ||
228 | return 0; | |
cbac8f63 CW |
229 | } |
230 | ||
231 | /** | |
232 | * rk_tsadcv2_initialize - initialize TASDC Controller | |
233 | * (1) Set TSADCV2_AUTO_PERIOD, configure the interleave between | |
234 | * every two accessing of TSADC in normal operation. | |
235 | * (2) Set TSADCV2_AUTO_PERIOD_HT, configure the interleave between | |
236 | * every two accessing of TSADC after the temperature is higher | |
237 | * than COM_SHUT or COM_INT. | |
238 | * (3) Set TSADCV2_HIGH_INT_DEBOUNCE and TSADC_HIGHT_TSHUT_DEBOUNCE, | |
239 | * if the temperature is higher than COMP_INT or COMP_SHUT for | |
240 | * "debounce" times, TSADC controller will generate interrupt or TSHUT. | |
241 | */ | |
242 | static void rk_tsadcv2_initialize(void __iomem *regs, | |
243 | enum tshut_polarity tshut_polarity) | |
244 | { | |
245 | if (tshut_polarity == TSHUT_HIGH_ACTIVE) | |
452e01b3 | 246 | writel_relaxed(0U | TSADCV2_AUTO_TSHUT_POLARITY_HIGH, |
cbac8f63 CW |
247 | regs + TSADCV2_AUTO_CON); |
248 | else | |
452e01b3 | 249 | writel_relaxed(0U & ~TSADCV2_AUTO_TSHUT_POLARITY_HIGH, |
cbac8f63 CW |
250 | regs + TSADCV2_AUTO_CON); |
251 | ||
252 | writel_relaxed(TSADCV2_AUTO_PERIOD_TIME, regs + TSADCV2_AUTO_PERIOD); | |
253 | writel_relaxed(TSADCV2_HIGHT_INT_DEBOUNCE_COUNT, | |
254 | regs + TSADCV2_HIGHT_INT_DEBOUNCE); | |
255 | writel_relaxed(TSADCV2_AUTO_PERIOD_HT_TIME, | |
256 | regs + TSADCV2_AUTO_PERIOD_HT); | |
257 | writel_relaxed(TSADCV2_HIGHT_TSHUT_DEBOUNCE_COUNT, | |
258 | regs + TSADCV2_HIGHT_TSHUT_DEBOUNCE); | |
259 | } | |
260 | ||
261 | static void rk_tsadcv2_irq_ack(void __iomem *regs) | |
262 | { | |
263 | u32 val; | |
264 | ||
265 | val = readl_relaxed(regs + TSADCV2_INT_PD); | |
452e01b3 | 266 | writel_relaxed(val & TSADCV2_INT_PD_CLEAR_MASK, regs + TSADCV2_INT_PD); |
cbac8f63 CW |
267 | } |
268 | ||
269 | static void rk_tsadcv2_control(void __iomem *regs, bool enable) | |
270 | { | |
271 | u32 val; | |
272 | ||
273 | val = readl_relaxed(regs + TSADCV2_AUTO_CON); | |
274 | if (enable) | |
275 | val |= TSADCV2_AUTO_EN; | |
276 | else | |
277 | val &= ~TSADCV2_AUTO_EN; | |
278 | ||
279 | writel_relaxed(val, regs + TSADCV2_AUTO_CON); | |
280 | } | |
281 | ||
17e8351a | 282 | static int rk_tsadcv2_get_temp(int chn, void __iomem *regs, int *temp) |
cbac8f63 CW |
283 | { |
284 | u32 val; | |
285 | ||
cbac8f63 | 286 | val = readl_relaxed(regs + TSADCV2_DATA(chn)); |
cbac8f63 | 287 | |
d9a241cb | 288 | return rk_tsadcv2_code_to_temp(val, temp); |
cbac8f63 CW |
289 | } |
290 | ||
291 | static void rk_tsadcv2_tshut_temp(int chn, void __iomem *regs, long temp) | |
292 | { | |
293 | u32 tshut_value, val; | |
294 | ||
295 | tshut_value = rk_tsadcv2_temp_to_code(temp); | |
296 | writel_relaxed(tshut_value, regs + TSADCV2_COMP_SHUT(chn)); | |
297 | ||
298 | /* TSHUT will be valid */ | |
299 | val = readl_relaxed(regs + TSADCV2_AUTO_CON); | |
300 | writel_relaxed(val | TSADCV2_AUTO_SRC_EN(chn), regs + TSADCV2_AUTO_CON); | |
301 | } | |
302 | ||
303 | static void rk_tsadcv2_tshut_mode(int chn, void __iomem *regs, | |
304 | enum tshut_mode mode) | |
305 | { | |
306 | u32 val; | |
307 | ||
308 | val = readl_relaxed(regs + TSADCV2_INT_EN); | |
309 | if (mode == TSHUT_MODE_GPIO) { | |
310 | val &= ~TSADCV2_SHUT_2CRU_SRC_EN(chn); | |
311 | val |= TSADCV2_SHUT_2GPIO_SRC_EN(chn); | |
312 | } else { | |
313 | val &= ~TSADCV2_SHUT_2GPIO_SRC_EN(chn); | |
314 | val |= TSADCV2_SHUT_2CRU_SRC_EN(chn); | |
315 | } | |
316 | ||
317 | writel_relaxed(val, regs + TSADCV2_INT_EN); | |
318 | } | |
319 | ||
320 | static const struct rockchip_tsadc_chip rk3288_tsadc_data = { | |
321 | .tshut_mode = TSHUT_MODE_GPIO, /* default TSHUT via GPIO give PMIC */ | |
322 | .tshut_polarity = TSHUT_LOW_ACTIVE, /* default TSHUT LOW ACTIVE */ | |
323 | .tshut_temp = 95000, | |
324 | ||
325 | .initialize = rk_tsadcv2_initialize, | |
326 | .irq_ack = rk_tsadcv2_irq_ack, | |
327 | .control = rk_tsadcv2_control, | |
328 | .get_temp = rk_tsadcv2_get_temp, | |
329 | .set_tshut_temp = rk_tsadcv2_tshut_temp, | |
330 | .set_tshut_mode = rk_tsadcv2_tshut_mode, | |
331 | }; | |
332 | ||
333 | static const struct of_device_id of_rockchip_thermal_match[] = { | |
334 | { | |
335 | .compatible = "rockchip,rk3288-tsadc", | |
336 | .data = (void *)&rk3288_tsadc_data, | |
337 | }, | |
338 | { /* end */ }, | |
339 | }; | |
340 | MODULE_DEVICE_TABLE(of, of_rockchip_thermal_match); | |
341 | ||
342 | static void | |
343 | rockchip_thermal_toggle_sensor(struct rockchip_thermal_sensor *sensor, bool on) | |
344 | { | |
345 | struct thermal_zone_device *tzd = sensor->tzd; | |
346 | ||
347 | tzd->ops->set_mode(tzd, | |
348 | on ? THERMAL_DEVICE_ENABLED : THERMAL_DEVICE_DISABLED); | |
349 | } | |
350 | ||
351 | static irqreturn_t rockchip_thermal_alarm_irq_thread(int irq, void *dev) | |
352 | { | |
353 | struct rockchip_thermal_data *thermal = dev; | |
354 | int i; | |
355 | ||
356 | dev_dbg(&thermal->pdev->dev, "thermal alarm\n"); | |
357 | ||
358 | thermal->chip->irq_ack(thermal->regs); | |
359 | ||
360 | for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++) | |
361 | thermal_zone_device_update(thermal->sensors[i].tzd); | |
362 | ||
363 | return IRQ_HANDLED; | |
364 | } | |
365 | ||
17e8351a | 366 | static int rockchip_thermal_get_temp(void *_sensor, int *out_temp) |
cbac8f63 CW |
367 | { |
368 | struct rockchip_thermal_sensor *sensor = _sensor; | |
369 | struct rockchip_thermal_data *thermal = sensor->thermal; | |
370 | const struct rockchip_tsadc_chip *tsadc = sensor->thermal->chip; | |
371 | int retval; | |
372 | ||
373 | retval = tsadc->get_temp(sensor->id, thermal->regs, out_temp); | |
17e8351a | 374 | dev_dbg(&thermal->pdev->dev, "sensor %d - temp: %d, retval: %d\n", |
cbac8f63 CW |
375 | sensor->id, *out_temp, retval); |
376 | ||
377 | return retval; | |
378 | } | |
379 | ||
380 | static const struct thermal_zone_of_device_ops rockchip_of_thermal_ops = { | |
381 | .get_temp = rockchip_thermal_get_temp, | |
382 | }; | |
383 | ||
384 | static int rockchip_configure_from_dt(struct device *dev, | |
385 | struct device_node *np, | |
386 | struct rockchip_thermal_data *thermal) | |
387 | { | |
388 | u32 shut_temp, tshut_mode, tshut_polarity; | |
389 | ||
390 | if (of_property_read_u32(np, "rockchip,hw-tshut-temp", &shut_temp)) { | |
391 | dev_warn(dev, | |
392 | "Missing tshut temp property, using default %ld\n", | |
393 | thermal->chip->tshut_temp); | |
394 | thermal->tshut_temp = thermal->chip->tshut_temp; | |
395 | } else { | |
396 | thermal->tshut_temp = shut_temp; | |
397 | } | |
398 | ||
399 | if (thermal->tshut_temp > INT_MAX) { | |
400 | dev_err(dev, "Invalid tshut temperature specified: %ld\n", | |
401 | thermal->tshut_temp); | |
402 | return -ERANGE; | |
403 | } | |
404 | ||
405 | if (of_property_read_u32(np, "rockchip,hw-tshut-mode", &tshut_mode)) { | |
406 | dev_warn(dev, | |
407 | "Missing tshut mode property, using default (%s)\n", | |
408 | thermal->chip->tshut_mode == TSHUT_MODE_GPIO ? | |
409 | "gpio" : "cru"); | |
410 | thermal->tshut_mode = thermal->chip->tshut_mode; | |
411 | } else { | |
412 | thermal->tshut_mode = tshut_mode; | |
413 | } | |
414 | ||
415 | if (thermal->tshut_mode > 1) { | |
416 | dev_err(dev, "Invalid tshut mode specified: %d\n", | |
417 | thermal->tshut_mode); | |
418 | return -EINVAL; | |
419 | } | |
420 | ||
421 | if (of_property_read_u32(np, "rockchip,hw-tshut-polarity", | |
422 | &tshut_polarity)) { | |
423 | dev_warn(dev, | |
424 | "Missing tshut-polarity property, using default (%s)\n", | |
425 | thermal->chip->tshut_polarity == TSHUT_LOW_ACTIVE ? | |
426 | "low" : "high"); | |
427 | thermal->tshut_polarity = thermal->chip->tshut_polarity; | |
428 | } else { | |
429 | thermal->tshut_polarity = tshut_polarity; | |
430 | } | |
431 | ||
432 | if (thermal->tshut_polarity > 1) { | |
433 | dev_err(dev, "Invalid tshut-polarity specified: %d\n", | |
434 | thermal->tshut_polarity); | |
435 | return -EINVAL; | |
436 | } | |
437 | ||
438 | return 0; | |
439 | } | |
440 | ||
441 | static int | |
442 | rockchip_thermal_register_sensor(struct platform_device *pdev, | |
443 | struct rockchip_thermal_data *thermal, | |
444 | struct rockchip_thermal_sensor *sensor, | |
445 | enum sensor_id id) | |
446 | { | |
447 | const struct rockchip_tsadc_chip *tsadc = thermal->chip; | |
448 | int error; | |
449 | ||
450 | tsadc->set_tshut_mode(id, thermal->regs, thermal->tshut_mode); | |
451 | tsadc->set_tshut_temp(id, thermal->regs, thermal->tshut_temp); | |
452 | ||
453 | sensor->thermal = thermal; | |
454 | sensor->id = id; | |
455 | sensor->tzd = thermal_zone_of_sensor_register(&pdev->dev, id, sensor, | |
456 | &rockchip_of_thermal_ops); | |
457 | if (IS_ERR(sensor->tzd)) { | |
458 | error = PTR_ERR(sensor->tzd); | |
459 | dev_err(&pdev->dev, "failed to register sensor %d: %d\n", | |
460 | id, error); | |
461 | return error; | |
462 | } | |
463 | ||
464 | return 0; | |
465 | } | |
466 | ||
467 | /* | |
468 | * Reset TSADC Controller, reset all tsadc registers. | |
469 | */ | |
470 | static void rockchip_thermal_reset_controller(struct reset_control *reset) | |
471 | { | |
472 | reset_control_assert(reset); | |
473 | usleep_range(10, 20); | |
474 | reset_control_deassert(reset); | |
475 | } | |
476 | ||
477 | static int rockchip_thermal_probe(struct platform_device *pdev) | |
478 | { | |
479 | struct device_node *np = pdev->dev.of_node; | |
480 | struct rockchip_thermal_data *thermal; | |
481 | const struct of_device_id *match; | |
482 | struct resource *res; | |
483 | int irq; | |
484 | int i; | |
485 | int error; | |
486 | ||
487 | match = of_match_node(of_rockchip_thermal_match, np); | |
488 | if (!match) | |
489 | return -ENXIO; | |
490 | ||
491 | irq = platform_get_irq(pdev, 0); | |
492 | if (irq < 0) { | |
493 | dev_err(&pdev->dev, "no irq resource?\n"); | |
494 | return -EINVAL; | |
495 | } | |
496 | ||
497 | thermal = devm_kzalloc(&pdev->dev, sizeof(struct rockchip_thermal_data), | |
498 | GFP_KERNEL); | |
499 | if (!thermal) | |
500 | return -ENOMEM; | |
501 | ||
502 | thermal->pdev = pdev; | |
503 | ||
504 | thermal->chip = (const struct rockchip_tsadc_chip *)match->data; | |
505 | if (!thermal->chip) | |
506 | return -EINVAL; | |
507 | ||
508 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
509 | thermal->regs = devm_ioremap_resource(&pdev->dev, res); | |
510 | if (IS_ERR(thermal->regs)) | |
511 | return PTR_ERR(thermal->regs); | |
512 | ||
513 | thermal->reset = devm_reset_control_get(&pdev->dev, "tsadc-apb"); | |
514 | if (IS_ERR(thermal->reset)) { | |
515 | error = PTR_ERR(thermal->reset); | |
516 | dev_err(&pdev->dev, "failed to get tsadc reset: %d\n", error); | |
517 | return error; | |
518 | } | |
519 | ||
520 | thermal->clk = devm_clk_get(&pdev->dev, "tsadc"); | |
521 | if (IS_ERR(thermal->clk)) { | |
522 | error = PTR_ERR(thermal->clk); | |
523 | dev_err(&pdev->dev, "failed to get tsadc clock: %d\n", error); | |
524 | return error; | |
525 | } | |
526 | ||
527 | thermal->pclk = devm_clk_get(&pdev->dev, "apb_pclk"); | |
528 | if (IS_ERR(thermal->pclk)) { | |
0d0a2bf6 | 529 | error = PTR_ERR(thermal->pclk); |
cbac8f63 CW |
530 | dev_err(&pdev->dev, "failed to get apb_pclk clock: %d\n", |
531 | error); | |
532 | return error; | |
533 | } | |
534 | ||
535 | error = clk_prepare_enable(thermal->clk); | |
536 | if (error) { | |
537 | dev_err(&pdev->dev, "failed to enable converter clock: %d\n", | |
538 | error); | |
539 | return error; | |
540 | } | |
541 | ||
542 | error = clk_prepare_enable(thermal->pclk); | |
543 | if (error) { | |
544 | dev_err(&pdev->dev, "failed to enable pclk: %d\n", error); | |
545 | goto err_disable_clk; | |
546 | } | |
547 | ||
548 | rockchip_thermal_reset_controller(thermal->reset); | |
549 | ||
550 | error = rockchip_configure_from_dt(&pdev->dev, np, thermal); | |
551 | if (error) { | |
552 | dev_err(&pdev->dev, "failed to parse device tree data: %d\n", | |
553 | error); | |
554 | goto err_disable_pclk; | |
555 | } | |
556 | ||
557 | thermal->chip->initialize(thermal->regs, thermal->tshut_polarity); | |
558 | ||
559 | error = rockchip_thermal_register_sensor(pdev, thermal, | |
560 | &thermal->sensors[0], | |
561 | SENSOR_CPU); | |
562 | if (error) { | |
563 | dev_err(&pdev->dev, | |
564 | "failed to register CPU thermal sensor: %d\n", error); | |
565 | goto err_disable_pclk; | |
566 | } | |
567 | ||
568 | error = rockchip_thermal_register_sensor(pdev, thermal, | |
569 | &thermal->sensors[1], | |
570 | SENSOR_GPU); | |
571 | if (error) { | |
572 | dev_err(&pdev->dev, | |
573 | "failed to register GPU thermal sensor: %d\n", error); | |
574 | goto err_unregister_cpu_sensor; | |
575 | } | |
576 | ||
577 | error = devm_request_threaded_irq(&pdev->dev, irq, NULL, | |
578 | &rockchip_thermal_alarm_irq_thread, | |
579 | IRQF_ONESHOT, | |
580 | "rockchip_thermal", thermal); | |
581 | if (error) { | |
582 | dev_err(&pdev->dev, | |
583 | "failed to request tsadc irq: %d\n", error); | |
584 | goto err_unregister_gpu_sensor; | |
585 | } | |
586 | ||
587 | thermal->chip->control(thermal->regs, true); | |
588 | ||
589 | for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++) | |
590 | rockchip_thermal_toggle_sensor(&thermal->sensors[i], true); | |
591 | ||
592 | platform_set_drvdata(pdev, thermal); | |
593 | ||
594 | return 0; | |
595 | ||
596 | err_unregister_gpu_sensor: | |
597 | thermal_zone_of_sensor_unregister(&pdev->dev, thermal->sensors[1].tzd); | |
598 | err_unregister_cpu_sensor: | |
599 | thermal_zone_of_sensor_unregister(&pdev->dev, thermal->sensors[0].tzd); | |
600 | err_disable_pclk: | |
601 | clk_disable_unprepare(thermal->pclk); | |
602 | err_disable_clk: | |
603 | clk_disable_unprepare(thermal->clk); | |
604 | ||
605 | return error; | |
606 | } | |
607 | ||
608 | static int rockchip_thermal_remove(struct platform_device *pdev) | |
609 | { | |
610 | struct rockchip_thermal_data *thermal = platform_get_drvdata(pdev); | |
611 | int i; | |
612 | ||
613 | for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++) { | |
614 | struct rockchip_thermal_sensor *sensor = &thermal->sensors[i]; | |
615 | ||
616 | rockchip_thermal_toggle_sensor(sensor, false); | |
617 | thermal_zone_of_sensor_unregister(&pdev->dev, sensor->tzd); | |
618 | } | |
619 | ||
620 | thermal->chip->control(thermal->regs, false); | |
621 | ||
622 | clk_disable_unprepare(thermal->pclk); | |
623 | clk_disable_unprepare(thermal->clk); | |
624 | ||
625 | return 0; | |
626 | } | |
627 | ||
628 | static int __maybe_unused rockchip_thermal_suspend(struct device *dev) | |
629 | { | |
630 | struct platform_device *pdev = to_platform_device(dev); | |
631 | struct rockchip_thermal_data *thermal = platform_get_drvdata(pdev); | |
632 | int i; | |
633 | ||
634 | for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++) | |
635 | rockchip_thermal_toggle_sensor(&thermal->sensors[i], false); | |
636 | ||
637 | thermal->chip->control(thermal->regs, false); | |
638 | ||
639 | clk_disable(thermal->pclk); | |
640 | clk_disable(thermal->clk); | |
641 | ||
7e38a5b1 CW |
642 | pinctrl_pm_select_sleep_state(dev); |
643 | ||
cbac8f63 CW |
644 | return 0; |
645 | } | |
646 | ||
647 | static int __maybe_unused rockchip_thermal_resume(struct device *dev) | |
648 | { | |
649 | struct platform_device *pdev = to_platform_device(dev); | |
650 | struct rockchip_thermal_data *thermal = platform_get_drvdata(pdev); | |
651 | int i; | |
652 | int error; | |
653 | ||
654 | error = clk_enable(thermal->clk); | |
655 | if (error) | |
656 | return error; | |
657 | ||
658 | error = clk_enable(thermal->pclk); | |
659 | if (error) | |
660 | return error; | |
661 | ||
662 | rockchip_thermal_reset_controller(thermal->reset); | |
663 | ||
664 | thermal->chip->initialize(thermal->regs, thermal->tshut_polarity); | |
665 | ||
666 | for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++) { | |
667 | enum sensor_id id = thermal->sensors[i].id; | |
668 | ||
669 | thermal->chip->set_tshut_mode(id, thermal->regs, | |
670 | thermal->tshut_mode); | |
671 | thermal->chip->set_tshut_temp(id, thermal->regs, | |
672 | thermal->tshut_temp); | |
673 | } | |
674 | ||
675 | thermal->chip->control(thermal->regs, true); | |
676 | ||
677 | for (i = 0; i < ARRAY_SIZE(thermal->sensors); i++) | |
678 | rockchip_thermal_toggle_sensor(&thermal->sensors[i], true); | |
679 | ||
7e38a5b1 CW |
680 | pinctrl_pm_select_default_state(dev); |
681 | ||
cbac8f63 CW |
682 | return 0; |
683 | } | |
684 | ||
685 | static SIMPLE_DEV_PM_OPS(rockchip_thermal_pm_ops, | |
686 | rockchip_thermal_suspend, rockchip_thermal_resume); | |
687 | ||
688 | static struct platform_driver rockchip_thermal_driver = { | |
689 | .driver = { | |
690 | .name = "rockchip-thermal", | |
cbac8f63 CW |
691 | .pm = &rockchip_thermal_pm_ops, |
692 | .of_match_table = of_rockchip_thermal_match, | |
693 | }, | |
694 | .probe = rockchip_thermal_probe, | |
695 | .remove = rockchip_thermal_remove, | |
696 | }; | |
697 | ||
698 | module_platform_driver(rockchip_thermal_driver); | |
699 | ||
700 | MODULE_DESCRIPTION("ROCKCHIP THERMAL Driver"); | |
701 | MODULE_AUTHOR("Rockchip, Inc."); | |
702 | MODULE_LICENSE("GPL v2"); | |
703 | MODULE_ALIAS("platform:rockchip-thermal"); |