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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (c) 2014-2016, Fuzhou Rockchip Electronics Co., Ltd
4 * Caesar Wang <wxt@rock-chips.com>
5 */
6
7#include <linux/clk.h>
8#include <linux/delay.h>
9#include <linux/interrupt.h>
10#include <linux/io.h>
11#include <linux/module.h>
12#include <linux/of.h>
13#include <linux/of_address.h>
14#include <linux/of_irq.h>
15#include <linux/platform_device.h>
16#include <linux/regmap.h>
17#include <linux/reset.h>
18#include <linux/thermal.h>
19#include <linux/mfd/syscon.h>
20#include <linux/pinctrl/consumer.h>
21
22/*
23 * If the temperature over a period of time High,
24 * the resulting TSHUT gave CRU module,let it reset the entire chip,
25 * or via GPIO give PMIC.
26 */
27enum tshut_mode {
28 TSHUT_MODE_CRU = 0,
29 TSHUT_MODE_GPIO,
30};
31
32/*
33 * The system Temperature Sensors tshut(tshut) polarity
34 * the bit 8 is tshut polarity.
35 * 0: low active, 1: high active
36 */
37enum tshut_polarity {
38 TSHUT_LOW_ACTIVE = 0,
39 TSHUT_HIGH_ACTIVE,
40};
41
42/*
43 * The system has two Temperature Sensors.
44 * sensor0 is for CPU, and sensor1 is for GPU.
45 */
46enum sensor_id {
47 SENSOR_CPU = 0,
48 SENSOR_GPU,
49};
50
51/*
52 * The conversion table has the adc value and temperature.
53 * ADC_DECREMENT: the adc value is of diminishing.(e.g. rk3288_code_table)
54 * ADC_INCREMENT: the adc value is incremental.(e.g. rk3368_code_table)
55 */
56enum adc_sort_mode {
57 ADC_DECREMENT = 0,
58 ADC_INCREMENT,
59};
60
61#include "thermal_hwmon.h"
62
63/**
64 * The max sensors is two in rockchip SoCs.
65 * Two sensors: CPU and GPU sensor.
66 */
67#define SOC_MAX_SENSORS 2
68
69/**
70 * struct chip_tsadc_table - hold information about chip-specific differences
71 * @id: conversion table
72 * @length: size of conversion table
73 * @data_mask: mask to apply on data inputs
74 * @mode: sort mode of this adc variant (incrementing or decrementing)
75 */
76struct chip_tsadc_table {
77 const struct tsadc_table *id;
78 unsigned int length;
79 u32 data_mask;
80 enum adc_sort_mode mode;
81};
82
83/**
84 * struct rockchip_tsadc_chip - hold the private data of tsadc chip
85 * @chn_id: array of sensor ids of chip corresponding to the channel
86 * @chn_num: the channel number of tsadc chip
87 * @tshut_temp: the hardware-controlled shutdown temperature value
88 * @tshut_mode: the hardware-controlled shutdown mode (0:CRU 1:GPIO)
89 * @tshut_polarity: the hardware-controlled active polarity (0:LOW 1:HIGH)
90 * @initialize: SoC special initialize tsadc controller method
91 * @irq_ack: clear the interrupt
92 * @control: enable/disable method for the tsadc controller
93 * @get_temp: get the temperature
94 * @set_alarm_temp: set the high temperature interrupt
95 * @set_tshut_temp: set the hardware-controlled shutdown temperature
96 * @set_tshut_mode: set the hardware-controlled shutdown mode
97 * @table: the chip-specific conversion table
98 */
99struct rockchip_tsadc_chip {
100 /* The sensor id of chip correspond to the ADC channel */
101 int chn_id[SOC_MAX_SENSORS];
102 int chn_num;
103
104 /* The hardware-controlled tshut property */
105 int tshut_temp;
106 enum tshut_mode tshut_mode;
107 enum tshut_polarity tshut_polarity;
108
109 /* Chip-wide methods */
110 void (*initialize)(struct regmap *grf,
111 void __iomem *reg, enum tshut_polarity p);
112 void (*irq_ack)(void __iomem *reg);
113 void (*control)(void __iomem *reg, bool on);
114
115 /* Per-sensor methods */
116 int (*get_temp)(const struct chip_tsadc_table *table,
117 int chn, void __iomem *reg, int *temp);
118 int (*set_alarm_temp)(const struct chip_tsadc_table *table,
119 int chn, void __iomem *reg, int temp);
120 int (*set_tshut_temp)(const struct chip_tsadc_table *table,
121 int chn, void __iomem *reg, int temp);
122 void (*set_tshut_mode)(int chn, void __iomem *reg, enum tshut_mode m);
123
124 /* Per-table methods */
125 struct chip_tsadc_table table;
126};
127
128/**
129 * struct rockchip_thermal_sensor - hold the information of thermal sensor
130 * @thermal: pointer to the platform/configuration data
131 * @tzd: pointer to a thermal zone
132 * @id: identifier of the thermal sensor
133 */
134struct rockchip_thermal_sensor {
135 struct rockchip_thermal_data *thermal;
136 struct thermal_zone_device *tzd;
137 int id;
138};
139
140/**
141 * struct rockchip_thermal_data - hold the private data of thermal driver
142 * @chip: pointer to the platform/configuration data
143 * @pdev: platform device of thermal
144 * @reset: the reset controller of tsadc
145 * @sensors: array of thermal sensors
146 * @clk: the controller clock is divided by the exteral 24MHz
147 * @pclk: the advanced peripherals bus clock
148 * @grf: the general register file will be used to do static set by software
149 * @regs: the base address of tsadc controller
150 * @tshut_temp: the hardware-controlled shutdown temperature value
151 * @tshut_mode: the hardware-controlled shutdown mode (0:CRU 1:GPIO)
152 * @tshut_polarity: the hardware-controlled active polarity (0:LOW 1:HIGH)
153 */
154struct rockchip_thermal_data {
155 const struct rockchip_tsadc_chip *chip;
156 struct platform_device *pdev;
157 struct reset_control *reset;
158
159 struct rockchip_thermal_sensor sensors[SOC_MAX_SENSORS];
160
161 struct clk *clk;
162 struct clk *pclk;
163
164 struct regmap *grf;
165 void __iomem *regs;
166
167 int tshut_temp;
168 enum tshut_mode tshut_mode;
169 enum tshut_polarity tshut_polarity;
170};
171
172/**
173 * TSADC Sensor Register description:
174 *
175 * TSADCV2_* are used for RK3288 SoCs, the other chips can reuse it.
176 * TSADCV3_* are used for newer SoCs than RK3288. (e.g: RK3228, RK3399)
177 *
178 */
179#define TSADCV2_USER_CON 0x00
180#define TSADCV2_AUTO_CON 0x04
181#define TSADCV2_INT_EN 0x08
182#define TSADCV2_INT_PD 0x0c
183#define TSADCV2_DATA(chn) (0x20 + (chn) * 0x04)
184#define TSADCV2_COMP_INT(chn) (0x30 + (chn) * 0x04)
185#define TSADCV2_COMP_SHUT(chn) (0x40 + (chn) * 0x04)
186#define TSADCV2_HIGHT_INT_DEBOUNCE 0x60
187#define TSADCV2_HIGHT_TSHUT_DEBOUNCE 0x64
188#define TSADCV2_AUTO_PERIOD 0x68
189#define TSADCV2_AUTO_PERIOD_HT 0x6c
190
191#define TSADCV2_AUTO_EN BIT(0)
192#define TSADCV2_AUTO_SRC_EN(chn) BIT(4 + (chn))
193#define TSADCV2_AUTO_TSHUT_POLARITY_HIGH BIT(8)
194
195#define TSADCV3_AUTO_Q_SEL_EN BIT(1)
196
197#define TSADCV2_INT_SRC_EN(chn) BIT(chn)
198#define TSADCV2_SHUT_2GPIO_SRC_EN(chn) BIT(4 + (chn))
199#define TSADCV2_SHUT_2CRU_SRC_EN(chn) BIT(8 + (chn))
200
201#define TSADCV2_INT_PD_CLEAR_MASK ~BIT(8)
202#define TSADCV3_INT_PD_CLEAR_MASK ~BIT(16)
203
204#define TSADCV2_DATA_MASK 0xfff
205#define TSADCV3_DATA_MASK 0x3ff
206
207#define TSADCV2_HIGHT_INT_DEBOUNCE_COUNT 4
208#define TSADCV2_HIGHT_TSHUT_DEBOUNCE_COUNT 4
209#define TSADCV2_AUTO_PERIOD_TIME 250 /* 250ms */
210#define TSADCV2_AUTO_PERIOD_HT_TIME 50 /* 50ms */
211#define TSADCV3_AUTO_PERIOD_TIME 1875 /* 2.5ms */
212#define TSADCV3_AUTO_PERIOD_HT_TIME 1875 /* 2.5ms */
213
214#define TSADCV5_AUTO_PERIOD_TIME 1622 /* 2.5ms */
215#define TSADCV5_AUTO_PERIOD_HT_TIME 1622 /* 2.5ms */
216
217#define TSADCV2_USER_INTER_PD_SOC 0x340 /* 13 clocks */
218#define TSADCV5_USER_INTER_PD_SOC 0xfc0 /* 97us, at least 90us */
219
220#define GRF_SARADC_TESTBIT 0x0e644
221#define GRF_TSADC_TESTBIT_L 0x0e648
222#define GRF_TSADC_TESTBIT_H 0x0e64c
223
224#define PX30_GRF_SOC_CON2 0x0408
225
226#define RK3568_GRF_TSADC_CON 0x0600
227#define RK3568_GRF_TSADC_ANA_REG0 (0x10001 << 0)
228#define RK3568_GRF_TSADC_ANA_REG1 (0x10001 << 1)
229#define RK3568_GRF_TSADC_ANA_REG2 (0x10001 << 2)
230#define RK3568_GRF_TSADC_TSEN (0x10001 << 8)
231
232#define GRF_SARADC_TESTBIT_ON (0x10001 << 2)
233#define GRF_TSADC_TESTBIT_H_ON (0x10001 << 2)
234#define GRF_TSADC_VCM_EN_L (0x10001 << 7)
235#define GRF_TSADC_VCM_EN_H (0x10001 << 7)
236
237#define GRF_CON_TSADC_CH_INV (0x10001 << 1)
238
239/**
240 * struct tsadc_table - code to temperature conversion table
241 * @code: the value of adc channel
242 * @temp: the temperature
243 * Note:
244 * code to temperature mapping of the temperature sensor is a piece wise linear
245 * curve.Any temperature, code faling between to 2 give temperatures can be
246 * linearly interpolated.
247 * Code to Temperature mapping should be updated based on manufacturer results.
248 */
249struct tsadc_table {
250 u32 code;
251 int temp;
252};
253
254static const struct tsadc_table rv1108_table[] = {
255 {0, -40000},
256 {374, -40000},
257 {382, -35000},
258 {389, -30000},
259 {397, -25000},
260 {405, -20000},
261 {413, -15000},
262 {421, -10000},
263 {429, -5000},
264 {436, 0},
265 {444, 5000},
266 {452, 10000},
267 {460, 15000},
268 {468, 20000},
269 {476, 25000},
270 {483, 30000},
271 {491, 35000},
272 {499, 40000},
273 {507, 45000},
274 {515, 50000},
275 {523, 55000},
276 {531, 60000},
277 {539, 65000},
278 {547, 70000},
279 {555, 75000},
280 {562, 80000},
281 {570, 85000},
282 {578, 90000},
283 {586, 95000},
284 {594, 100000},
285 {602, 105000},
286 {610, 110000},
287 {618, 115000},
288 {626, 120000},
289 {634, 125000},
290 {TSADCV2_DATA_MASK, 125000},
291};
292
293static const struct tsadc_table rk3228_code_table[] = {
294 {0, -40000},
295 {588, -40000},
296 {593, -35000},
297 {598, -30000},
298 {603, -25000},
299 {608, -20000},
300 {613, -15000},
301 {618, -10000},
302 {623, -5000},
303 {629, 0},
304 {634, 5000},
305 {639, 10000},
306 {644, 15000},
307 {649, 20000},
308 {654, 25000},
309 {660, 30000},
310 {665, 35000},
311 {670, 40000},
312 {675, 45000},
313 {681, 50000},
314 {686, 55000},
315 {691, 60000},
316 {696, 65000},
317 {702, 70000},
318 {707, 75000},
319 {712, 80000},
320 {717, 85000},
321 {723, 90000},
322 {728, 95000},
323 {733, 100000},
324 {738, 105000},
325 {744, 110000},
326 {749, 115000},
327 {754, 120000},
328 {760, 125000},
329 {TSADCV2_DATA_MASK, 125000},
330};
331
332static const struct tsadc_table rk3288_code_table[] = {
333 {TSADCV2_DATA_MASK, -40000},
334 {3800, -40000},
335 {3792, -35000},
336 {3783, -30000},
337 {3774, -25000},
338 {3765, -20000},
339 {3756, -15000},
340 {3747, -10000},
341 {3737, -5000},
342 {3728, 0},
343 {3718, 5000},
344 {3708, 10000},
345 {3698, 15000},
346 {3688, 20000},
347 {3678, 25000},
348 {3667, 30000},
349 {3656, 35000},
350 {3645, 40000},
351 {3634, 45000},
352 {3623, 50000},
353 {3611, 55000},
354 {3600, 60000},
355 {3588, 65000},
356 {3575, 70000},
357 {3563, 75000},
358 {3550, 80000},
359 {3537, 85000},
360 {3524, 90000},
361 {3510, 95000},
362 {3496, 100000},
363 {3482, 105000},
364 {3467, 110000},
365 {3452, 115000},
366 {3437, 120000},
367 {3421, 125000},
368 {0, 125000},
369};
370
371static const struct tsadc_table rk3328_code_table[] = {
372 {0, -40000},
373 {296, -40000},
374 {304, -35000},
375 {313, -30000},
376 {331, -20000},
377 {340, -15000},
378 {349, -10000},
379 {359, -5000},
380 {368, 0},
381 {378, 5000},
382 {388, 10000},
383 {398, 15000},
384 {408, 20000},
385 {418, 25000},
386 {429, 30000},
387 {440, 35000},
388 {451, 40000},
389 {462, 45000},
390 {473, 50000},
391 {485, 55000},
392 {496, 60000},
393 {508, 65000},
394 {521, 70000},
395 {533, 75000},
396 {546, 80000},
397 {559, 85000},
398 {572, 90000},
399 {586, 95000},
400 {600, 100000},
401 {614, 105000},
402 {629, 110000},
403 {644, 115000},
404 {659, 120000},
405 {675, 125000},
406 {TSADCV2_DATA_MASK, 125000},
407};
408
409static const struct tsadc_table rk3368_code_table[] = {
410 {0, -40000},
411 {106, -40000},
412 {108, -35000},
413 {110, -30000},
414 {112, -25000},
415 {114, -20000},
416 {116, -15000},
417 {118, -10000},
418 {120, -5000},
419 {122, 0},
420 {124, 5000},
421 {126, 10000},
422 {128, 15000},
423 {130, 20000},
424 {132, 25000},
425 {134, 30000},
426 {136, 35000},
427 {138, 40000},
428 {140, 45000},
429 {142, 50000},
430 {144, 55000},
431 {146, 60000},
432 {148, 65000},
433 {150, 70000},
434 {152, 75000},
435 {154, 80000},
436 {156, 85000},
437 {158, 90000},
438 {160, 95000},
439 {162, 100000},
440 {163, 105000},
441 {165, 110000},
442 {167, 115000},
443 {169, 120000},
444 {171, 125000},
445 {TSADCV3_DATA_MASK, 125000},
446};
447
448static const struct tsadc_table rk3399_code_table[] = {
449 {0, -40000},
450 {402, -40000},
451 {410, -35000},
452 {419, -30000},
453 {427, -25000},
454 {436, -20000},
455 {444, -15000},
456 {453, -10000},
457 {461, -5000},
458 {470, 0},
459 {478, 5000},
460 {487, 10000},
461 {496, 15000},
462 {504, 20000},
463 {513, 25000},
464 {521, 30000},
465 {530, 35000},
466 {538, 40000},
467 {547, 45000},
468 {555, 50000},
469 {564, 55000},
470 {573, 60000},
471 {581, 65000},
472 {590, 70000},
473 {599, 75000},
474 {607, 80000},
475 {616, 85000},
476 {624, 90000},
477 {633, 95000},
478 {642, 100000},
479 {650, 105000},
480 {659, 110000},
481 {668, 115000},
482 {677, 120000},
483 {685, 125000},
484 {TSADCV3_DATA_MASK, 125000},
485};
486
487static const struct tsadc_table rk3568_code_table[] = {
488 {0, -40000},
489 {1584, -40000},
490 {1620, -35000},
491 {1652, -30000},
492 {1688, -25000},
493 {1720, -20000},
494 {1756, -15000},
495 {1788, -10000},
496 {1824, -5000},
497 {1856, 0},
498 {1892, 5000},
499 {1924, 10000},
500 {1956, 15000},
501 {1992, 20000},
502 {2024, 25000},
503 {2060, 30000},
504 {2092, 35000},
505 {2128, 40000},
506 {2160, 45000},
507 {2196, 50000},
508 {2228, 55000},
509 {2264, 60000},
510 {2300, 65000},
511 {2332, 70000},
512 {2368, 75000},
513 {2400, 80000},
514 {2436, 85000},
515 {2468, 90000},
516 {2500, 95000},
517 {2536, 100000},
518 {2572, 105000},
519 {2604, 110000},
520 {2636, 115000},
521 {2672, 120000},
522 {2704, 125000},
523 {TSADCV2_DATA_MASK, 125000},
524};
525
526static u32 rk_tsadcv2_temp_to_code(const struct chip_tsadc_table *table,
527 int temp)
528{
529 int high, low, mid;
530 unsigned long num;
531 unsigned int denom;
532 u32 error = table->data_mask;
533
534 low = 0;
535 high = (table->length - 1) - 1; /* ignore the last check for table */
536 mid = (high + low) / 2;
537
538 /* Return mask code data when the temp is over table range */
539 if (temp < table->id[low].temp || temp > table->id[high].temp)
540 goto exit;
541
542 while (low <= high) {
543 if (temp == table->id[mid].temp)
544 return table->id[mid].code;
545 else if (temp < table->id[mid].temp)
546 high = mid - 1;
547 else
548 low = mid + 1;
549 mid = (low + high) / 2;
550 }
551
552 /*
553 * The conversion code granularity provided by the table. Let's
554 * assume that the relationship between temperature and
555 * analog value between 2 table entries is linear and interpolate
556 * to produce less granular result.
557 */
558 num = abs(table->id[mid + 1].code - table->id[mid].code);
559 num *= temp - table->id[mid].temp;
560 denom = table->id[mid + 1].temp - table->id[mid].temp;
561
562 switch (table->mode) {
563 case ADC_DECREMENT:
564 return table->id[mid].code - (num / denom);
565 case ADC_INCREMENT:
566 return table->id[mid].code + (num / denom);
567 default:
568 pr_err("%s: unknown table mode: %d\n", __func__, table->mode);
569 return error;
570 }
571
572exit:
573 pr_err("%s: invalid temperature, temp=%d error=%d\n",
574 __func__, temp, error);
575 return error;
576}
577
578static int rk_tsadcv2_code_to_temp(const struct chip_tsadc_table *table,
579 u32 code, int *temp)
580{
581 unsigned int low = 1;
582 unsigned int high = table->length - 1;
583 unsigned int mid = (low + high) / 2;
584 unsigned int num;
585 unsigned long denom;
586
587 WARN_ON(table->length < 2);
588
589 switch (table->mode) {
590 case ADC_DECREMENT:
591 code &= table->data_mask;
592 if (code <= table->id[high].code)
593 return -EAGAIN; /* Incorrect reading */
594
595 while (low <= high) {
596 if (code >= table->id[mid].code &&
597 code < table->id[mid - 1].code)
598 break;
599 else if (code < table->id[mid].code)
600 low = mid + 1;
601 else
602 high = mid - 1;
603
604 mid = (low + high) / 2;
605 }
606 break;
607 case ADC_INCREMENT:
608 code &= table->data_mask;
609 if (code < table->id[low].code)
610 return -EAGAIN; /* Incorrect reading */
611
612 while (low <= high) {
613 if (code <= table->id[mid].code &&
614 code > table->id[mid - 1].code)
615 break;
616 else if (code > table->id[mid].code)
617 low = mid + 1;
618 else
619 high = mid - 1;
620
621 mid = (low + high) / 2;
622 }
623 break;
624 default:
625 pr_err("%s: unknown table mode: %d\n", __func__, table->mode);
626 return -EINVAL;
627 }
628
629 /*
630 * The 5C granularity provided by the table is too much. Let's
631 * assume that the relationship between sensor readings and
632 * temperature between 2 table entries is linear and interpolate
633 * to produce less granular result.
634 */
635 num = table->id[mid].temp - table->id[mid - 1].temp;
636 num *= abs(table->id[mid - 1].code - code);
637 denom = abs(table->id[mid - 1].code - table->id[mid].code);
638 *temp = table->id[mid - 1].temp + (num / denom);
639
640 return 0;
641}
642
643/**
644 * rk_tsadcv2_initialize - initialize TASDC Controller.
645 * @grf: the general register file will be used to do static set by software
646 * @regs: the base address of tsadc controller
647 * @tshut_polarity: the hardware-controlled active polarity (0:LOW 1:HIGH)
648 *
649 * (1) Set TSADC_V2_AUTO_PERIOD:
650 * Configure the interleave between every two accessing of
651 * TSADC in normal operation.
652 *
653 * (2) Set TSADCV2_AUTO_PERIOD_HT:
654 * Configure the interleave between every two accessing of
655 * TSADC after the temperature is higher than COM_SHUT or COM_INT.
656 *
657 * (3) Set TSADCV2_HIGH_INT_DEBOUNCE and TSADC_HIGHT_TSHUT_DEBOUNCE:
658 * If the temperature is higher than COMP_INT or COMP_SHUT for
659 * "debounce" times, TSADC controller will generate interrupt or TSHUT.
660 */
661static void rk_tsadcv2_initialize(struct regmap *grf, void __iomem *regs,
662 enum tshut_polarity tshut_polarity)
663{
664 if (tshut_polarity == TSHUT_HIGH_ACTIVE)
665 writel_relaxed(0U | TSADCV2_AUTO_TSHUT_POLARITY_HIGH,
666 regs + TSADCV2_AUTO_CON);
667 else
668 writel_relaxed(0U & ~TSADCV2_AUTO_TSHUT_POLARITY_HIGH,
669 regs + TSADCV2_AUTO_CON);
670
671 writel_relaxed(TSADCV2_AUTO_PERIOD_TIME, regs + TSADCV2_AUTO_PERIOD);
672 writel_relaxed(TSADCV2_HIGHT_INT_DEBOUNCE_COUNT,
673 regs + TSADCV2_HIGHT_INT_DEBOUNCE);
674 writel_relaxed(TSADCV2_AUTO_PERIOD_HT_TIME,
675 regs + TSADCV2_AUTO_PERIOD_HT);
676 writel_relaxed(TSADCV2_HIGHT_TSHUT_DEBOUNCE_COUNT,
677 regs + TSADCV2_HIGHT_TSHUT_DEBOUNCE);
678}
679
680/**
681 * rk_tsadcv3_initialize - initialize TASDC Controller.
682 * @grf: the general register file will be used to do static set by software
683 * @regs: the base address of tsadc controller
684 * @tshut_polarity: the hardware-controlled active polarity (0:LOW 1:HIGH)
685 *
686 * (1) The tsadc control power sequence.
687 *
688 * (2) Set TSADC_V2_AUTO_PERIOD:
689 * Configure the interleave between every two accessing of
690 * TSADC in normal operation.
691 *
692 * (2) Set TSADCV2_AUTO_PERIOD_HT:
693 * Configure the interleave between every two accessing of
694 * TSADC after the temperature is higher than COM_SHUT or COM_INT.
695 *
696 * (3) Set TSADCV2_HIGH_INT_DEBOUNCE and TSADC_HIGHT_TSHUT_DEBOUNCE:
697 * If the temperature is higher than COMP_INT or COMP_SHUT for
698 * "debounce" times, TSADC controller will generate interrupt or TSHUT.
699 */
700static void rk_tsadcv3_initialize(struct regmap *grf, void __iomem *regs,
701 enum tshut_polarity tshut_polarity)
702{
703 /* The tsadc control power sequence */
704 if (IS_ERR(grf)) {
705 /* Set interleave value to workround ic time sync issue */
706 writel_relaxed(TSADCV2_USER_INTER_PD_SOC, regs +
707 TSADCV2_USER_CON);
708
709 writel_relaxed(TSADCV2_AUTO_PERIOD_TIME,
710 regs + TSADCV2_AUTO_PERIOD);
711 writel_relaxed(TSADCV2_HIGHT_INT_DEBOUNCE_COUNT,
712 regs + TSADCV2_HIGHT_INT_DEBOUNCE);
713 writel_relaxed(TSADCV2_AUTO_PERIOD_HT_TIME,
714 regs + TSADCV2_AUTO_PERIOD_HT);
715 writel_relaxed(TSADCV2_HIGHT_TSHUT_DEBOUNCE_COUNT,
716 regs + TSADCV2_HIGHT_TSHUT_DEBOUNCE);
717
718 } else {
719 /* Enable the voltage common mode feature */
720 regmap_write(grf, GRF_TSADC_TESTBIT_L, GRF_TSADC_VCM_EN_L);
721 regmap_write(grf, GRF_TSADC_TESTBIT_H, GRF_TSADC_VCM_EN_H);
722
723 usleep_range(15, 100); /* The spec note says at least 15 us */
724 regmap_write(grf, GRF_SARADC_TESTBIT, GRF_SARADC_TESTBIT_ON);
725 regmap_write(grf, GRF_TSADC_TESTBIT_H, GRF_TSADC_TESTBIT_H_ON);
726 usleep_range(90, 200); /* The spec note says at least 90 us */
727
728 writel_relaxed(TSADCV3_AUTO_PERIOD_TIME,
729 regs + TSADCV2_AUTO_PERIOD);
730 writel_relaxed(TSADCV2_HIGHT_INT_DEBOUNCE_COUNT,
731 regs + TSADCV2_HIGHT_INT_DEBOUNCE);
732 writel_relaxed(TSADCV3_AUTO_PERIOD_HT_TIME,
733 regs + TSADCV2_AUTO_PERIOD_HT);
734 writel_relaxed(TSADCV2_HIGHT_TSHUT_DEBOUNCE_COUNT,
735 regs + TSADCV2_HIGHT_TSHUT_DEBOUNCE);
736 }
737
738 if (tshut_polarity == TSHUT_HIGH_ACTIVE)
739 writel_relaxed(0U | TSADCV2_AUTO_TSHUT_POLARITY_HIGH,
740 regs + TSADCV2_AUTO_CON);
741 else
742 writel_relaxed(0U & ~TSADCV2_AUTO_TSHUT_POLARITY_HIGH,
743 regs + TSADCV2_AUTO_CON);
744}
745
746static void rk_tsadcv4_initialize(struct regmap *grf, void __iomem *regs,
747 enum tshut_polarity tshut_polarity)
748{
749 rk_tsadcv2_initialize(grf, regs, tshut_polarity);
750 regmap_write(grf, PX30_GRF_SOC_CON2, GRF_CON_TSADC_CH_INV);
751}
752
753static void rk_tsadcv7_initialize(struct regmap *grf, void __iomem *regs,
754 enum tshut_polarity tshut_polarity)
755{
756 writel_relaxed(TSADCV5_USER_INTER_PD_SOC, regs + TSADCV2_USER_CON);
757 writel_relaxed(TSADCV5_AUTO_PERIOD_TIME, regs + TSADCV2_AUTO_PERIOD);
758 writel_relaxed(TSADCV2_HIGHT_INT_DEBOUNCE_COUNT,
759 regs + TSADCV2_HIGHT_INT_DEBOUNCE);
760 writel_relaxed(TSADCV5_AUTO_PERIOD_HT_TIME,
761 regs + TSADCV2_AUTO_PERIOD_HT);
762 writel_relaxed(TSADCV2_HIGHT_TSHUT_DEBOUNCE_COUNT,
763 regs + TSADCV2_HIGHT_TSHUT_DEBOUNCE);
764
765 if (tshut_polarity == TSHUT_HIGH_ACTIVE)
766 writel_relaxed(0U | TSADCV2_AUTO_TSHUT_POLARITY_HIGH,
767 regs + TSADCV2_AUTO_CON);
768 else
769 writel_relaxed(0U & ~TSADCV2_AUTO_TSHUT_POLARITY_HIGH,
770 regs + TSADCV2_AUTO_CON);
771
772 /*
773 * The general register file will is optional
774 * and might not be available.
775 */
776 if (!IS_ERR(grf)) {
777 regmap_write(grf, RK3568_GRF_TSADC_CON, RK3568_GRF_TSADC_TSEN);
778 /*
779 * RK3568 TRM, section 18.5. requires a delay no less
780 * than 10us between the rising edge of tsadc_tsen_en
781 * and the rising edge of tsadc_ana_reg_0/1/2.
782 */
783 udelay(15);
784 regmap_write(grf, RK3568_GRF_TSADC_CON, RK3568_GRF_TSADC_ANA_REG0);
785 regmap_write(grf, RK3568_GRF_TSADC_CON, RK3568_GRF_TSADC_ANA_REG1);
786 regmap_write(grf, RK3568_GRF_TSADC_CON, RK3568_GRF_TSADC_ANA_REG2);
787
788 /*
789 * RK3568 TRM, section 18.5. requires a delay no less
790 * than 90us after the rising edge of tsadc_ana_reg_0/1/2.
791 */
792 usleep_range(100, 200);
793 }
794}
795
796static void rk_tsadcv2_irq_ack(void __iomem *regs)
797{
798 u32 val;
799
800 val = readl_relaxed(regs + TSADCV2_INT_PD);
801 writel_relaxed(val & TSADCV2_INT_PD_CLEAR_MASK, regs + TSADCV2_INT_PD);
802}
803
804static void rk_tsadcv3_irq_ack(void __iomem *regs)
805{
806 u32 val;
807
808 val = readl_relaxed(regs + TSADCV2_INT_PD);
809 writel_relaxed(val & TSADCV3_INT_PD_CLEAR_MASK, regs + TSADCV2_INT_PD);
810}
811
812static void rk_tsadcv2_control(void __iomem *regs, bool enable)
813{
814 u32 val;
815
816 val = readl_relaxed(regs + TSADCV2_AUTO_CON);
817 if (enable)
818 val |= TSADCV2_AUTO_EN;
819 else
820 val &= ~TSADCV2_AUTO_EN;
821
822 writel_relaxed(val, regs + TSADCV2_AUTO_CON);
823}
824
825/**
826 * rk_tsadcv3_control - the tsadc controller is enabled or disabled.
827 * @regs: the base address of tsadc controller
828 * @enable: boolean flag to enable the controller
829 *
830 * NOTE: TSADC controller works at auto mode, and some SoCs need set the
831 * tsadc_q_sel bit on TSADCV2_AUTO_CON[1]. The (1024 - tsadc_q) as output
832 * adc value if setting this bit to enable.
833 */
834static void rk_tsadcv3_control(void __iomem *regs, bool enable)
835{
836 u32 val;
837
838 val = readl_relaxed(regs + TSADCV2_AUTO_CON);
839 if (enable)
840 val |= TSADCV2_AUTO_EN | TSADCV3_AUTO_Q_SEL_EN;
841 else
842 val &= ~TSADCV2_AUTO_EN;
843
844 writel_relaxed(val, regs + TSADCV2_AUTO_CON);
845}
846
847static int rk_tsadcv2_get_temp(const struct chip_tsadc_table *table,
848 int chn, void __iomem *regs, int *temp)
849{
850 u32 val;
851
852 val = readl_relaxed(regs + TSADCV2_DATA(chn));
853
854 return rk_tsadcv2_code_to_temp(table, val, temp);
855}
856
857static int rk_tsadcv2_alarm_temp(const struct chip_tsadc_table *table,
858 int chn, void __iomem *regs, int temp)
859{
860 u32 alarm_value;
861 u32 int_en, int_clr;
862
863 /*
864 * In some cases, some sensors didn't need the trip points, the
865 * set_trips will pass {-INT_MAX, INT_MAX} to trigger tsadc alarm
866 * in the end, ignore this case and disable the high temperature
867 * interrupt.
868 */
869 if (temp == INT_MAX) {
870 int_clr = readl_relaxed(regs + TSADCV2_INT_EN);
871 int_clr &= ~TSADCV2_INT_SRC_EN(chn);
872 writel_relaxed(int_clr, regs + TSADCV2_INT_EN);
873 return 0;
874 }
875
876 /* Make sure the value is valid */
877 alarm_value = rk_tsadcv2_temp_to_code(table, temp);
878 if (alarm_value == table->data_mask)
879 return -ERANGE;
880
881 writel_relaxed(alarm_value & table->data_mask,
882 regs + TSADCV2_COMP_INT(chn));
883
884 int_en = readl_relaxed(regs + TSADCV2_INT_EN);
885 int_en |= TSADCV2_INT_SRC_EN(chn);
886 writel_relaxed(int_en, regs + TSADCV2_INT_EN);
887
888 return 0;
889}
890
891static int rk_tsadcv2_tshut_temp(const struct chip_tsadc_table *table,
892 int chn, void __iomem *regs, int temp)
893{
894 u32 tshut_value, val;
895
896 /* Make sure the value is valid */
897 tshut_value = rk_tsadcv2_temp_to_code(table, temp);
898 if (tshut_value == table->data_mask)
899 return -ERANGE;
900
901 writel_relaxed(tshut_value, regs + TSADCV2_COMP_SHUT(chn));
902
903 /* TSHUT will be valid */
904 val = readl_relaxed(regs + TSADCV2_AUTO_CON);
905 writel_relaxed(val | TSADCV2_AUTO_SRC_EN(chn), regs + TSADCV2_AUTO_CON);
906
907 return 0;
908}
909
910static void rk_tsadcv2_tshut_mode(int chn, void __iomem *regs,
911 enum tshut_mode mode)
912{
913 u32 val;
914
915 val = readl_relaxed(regs + TSADCV2_INT_EN);
916 if (mode == TSHUT_MODE_GPIO) {
917 val &= ~TSADCV2_SHUT_2CRU_SRC_EN(chn);
918 val |= TSADCV2_SHUT_2GPIO_SRC_EN(chn);
919 } else {
920 val &= ~TSADCV2_SHUT_2GPIO_SRC_EN(chn);
921 val |= TSADCV2_SHUT_2CRU_SRC_EN(chn);
922 }
923
924 writel_relaxed(val, regs + TSADCV2_INT_EN);
925}
926
927static const struct rockchip_tsadc_chip px30_tsadc_data = {
928 .chn_id[SENSOR_CPU] = 0, /* cpu sensor is channel 0 */
929 .chn_id[SENSOR_GPU] = 1, /* gpu sensor is channel 1 */
930 .chn_num = 2, /* 2 channels for tsadc */
931
932 .tshut_mode = TSHUT_MODE_CRU, /* default TSHUT via CRU */
933 .tshut_temp = 95000,
934
935 .initialize = rk_tsadcv4_initialize,
936 .irq_ack = rk_tsadcv3_irq_ack,
937 .control = rk_tsadcv3_control,
938 .get_temp = rk_tsadcv2_get_temp,
939 .set_alarm_temp = rk_tsadcv2_alarm_temp,
940 .set_tshut_temp = rk_tsadcv2_tshut_temp,
941 .set_tshut_mode = rk_tsadcv2_tshut_mode,
942
943 .table = {
944 .id = rk3328_code_table,
945 .length = ARRAY_SIZE(rk3328_code_table),
946 .data_mask = TSADCV2_DATA_MASK,
947 .mode = ADC_INCREMENT,
948 },
949};
950
951static const struct rockchip_tsadc_chip rv1108_tsadc_data = {
952 .chn_id[SENSOR_CPU] = 0, /* cpu sensor is channel 0 */
953 .chn_num = 1, /* one channel for tsadc */
954
955 .tshut_mode = TSHUT_MODE_GPIO, /* default TSHUT via GPIO give PMIC */
956 .tshut_polarity = TSHUT_LOW_ACTIVE, /* default TSHUT LOW ACTIVE */
957 .tshut_temp = 95000,
958
959 .initialize = rk_tsadcv2_initialize,
960 .irq_ack = rk_tsadcv3_irq_ack,
961 .control = rk_tsadcv3_control,
962 .get_temp = rk_tsadcv2_get_temp,
963 .set_alarm_temp = rk_tsadcv2_alarm_temp,
964 .set_tshut_temp = rk_tsadcv2_tshut_temp,
965 .set_tshut_mode = rk_tsadcv2_tshut_mode,
966
967 .table = {
968 .id = rv1108_table,
969 .length = ARRAY_SIZE(rv1108_table),
970 .data_mask = TSADCV2_DATA_MASK,
971 .mode = ADC_INCREMENT,
972 },
973};
974
975static const struct rockchip_tsadc_chip rk3228_tsadc_data = {
976 .chn_id[SENSOR_CPU] = 0, /* cpu sensor is channel 0 */
977 .chn_num = 1, /* one channel for tsadc */
978
979 .tshut_mode = TSHUT_MODE_GPIO, /* default TSHUT via GPIO give PMIC */
980 .tshut_polarity = TSHUT_LOW_ACTIVE, /* default TSHUT LOW ACTIVE */
981 .tshut_temp = 95000,
982
983 .initialize = rk_tsadcv2_initialize,
984 .irq_ack = rk_tsadcv3_irq_ack,
985 .control = rk_tsadcv3_control,
986 .get_temp = rk_tsadcv2_get_temp,
987 .set_alarm_temp = rk_tsadcv2_alarm_temp,
988 .set_tshut_temp = rk_tsadcv2_tshut_temp,
989 .set_tshut_mode = rk_tsadcv2_tshut_mode,
990
991 .table = {
992 .id = rk3228_code_table,
993 .length = ARRAY_SIZE(rk3228_code_table),
994 .data_mask = TSADCV3_DATA_MASK,
995 .mode = ADC_INCREMENT,
996 },
997};
998
999static const struct rockchip_tsadc_chip rk3288_tsadc_data = {
1000 .chn_id[SENSOR_CPU] = 1, /* cpu sensor is channel 1 */
1001 .chn_id[SENSOR_GPU] = 2, /* gpu sensor is channel 2 */
1002 .chn_num = 2, /* two channels for tsadc */
1003
1004 .tshut_mode = TSHUT_MODE_GPIO, /* default TSHUT via GPIO give PMIC */
1005 .tshut_polarity = TSHUT_LOW_ACTIVE, /* default TSHUT LOW ACTIVE */
1006 .tshut_temp = 95000,
1007
1008 .initialize = rk_tsadcv2_initialize,
1009 .irq_ack = rk_tsadcv2_irq_ack,
1010 .control = rk_tsadcv2_control,
1011 .get_temp = rk_tsadcv2_get_temp,
1012 .set_alarm_temp = rk_tsadcv2_alarm_temp,
1013 .set_tshut_temp = rk_tsadcv2_tshut_temp,
1014 .set_tshut_mode = rk_tsadcv2_tshut_mode,
1015
1016 .table = {
1017 .id = rk3288_code_table,
1018 .length = ARRAY_SIZE(rk3288_code_table),
1019 .data_mask = TSADCV2_DATA_MASK,
1020 .mode = ADC_DECREMENT,
1021 },
1022};
1023
1024static const struct rockchip_tsadc_chip rk3328_tsadc_data = {
1025 .chn_id[SENSOR_CPU] = 0, /* cpu sensor is channel 0 */
1026 .chn_num = 1, /* one channels for tsadc */
1027
1028 .tshut_mode = TSHUT_MODE_CRU, /* default TSHUT via CRU */
1029 .tshut_temp = 95000,
1030
1031 .initialize = rk_tsadcv2_initialize,
1032 .irq_ack = rk_tsadcv3_irq_ack,
1033 .control = rk_tsadcv3_control,
1034 .get_temp = rk_tsadcv2_get_temp,
1035 .set_alarm_temp = rk_tsadcv2_alarm_temp,
1036 .set_tshut_temp = rk_tsadcv2_tshut_temp,
1037 .set_tshut_mode = rk_tsadcv2_tshut_mode,
1038
1039 .table = {
1040 .id = rk3328_code_table,
1041 .length = ARRAY_SIZE(rk3328_code_table),
1042 .data_mask = TSADCV2_DATA_MASK,
1043 .mode = ADC_INCREMENT,
1044 },
1045};
1046
1047static const struct rockchip_tsadc_chip rk3366_tsadc_data = {
1048 .chn_id[SENSOR_CPU] = 0, /* cpu sensor is channel 0 */
1049 .chn_id[SENSOR_GPU] = 1, /* gpu sensor is channel 1 */
1050 .chn_num = 2, /* two channels for tsadc */
1051
1052 .tshut_mode = TSHUT_MODE_GPIO, /* default TSHUT via GPIO give PMIC */
1053 .tshut_polarity = TSHUT_LOW_ACTIVE, /* default TSHUT LOW ACTIVE */
1054 .tshut_temp = 95000,
1055
1056 .initialize = rk_tsadcv3_initialize,
1057 .irq_ack = rk_tsadcv3_irq_ack,
1058 .control = rk_tsadcv3_control,
1059 .get_temp = rk_tsadcv2_get_temp,
1060 .set_alarm_temp = rk_tsadcv2_alarm_temp,
1061 .set_tshut_temp = rk_tsadcv2_tshut_temp,
1062 .set_tshut_mode = rk_tsadcv2_tshut_mode,
1063
1064 .table = {
1065 .id = rk3228_code_table,
1066 .length = ARRAY_SIZE(rk3228_code_table),
1067 .data_mask = TSADCV3_DATA_MASK,
1068 .mode = ADC_INCREMENT,
1069 },
1070};
1071
1072static const struct rockchip_tsadc_chip rk3368_tsadc_data = {
1073 .chn_id[SENSOR_CPU] = 0, /* cpu sensor is channel 0 */
1074 .chn_id[SENSOR_GPU] = 1, /* gpu sensor is channel 1 */
1075 .chn_num = 2, /* two channels for tsadc */
1076
1077 .tshut_mode = TSHUT_MODE_GPIO, /* default TSHUT via GPIO give PMIC */
1078 .tshut_polarity = TSHUT_LOW_ACTIVE, /* default TSHUT LOW ACTIVE */
1079 .tshut_temp = 95000,
1080
1081 .initialize = rk_tsadcv2_initialize,
1082 .irq_ack = rk_tsadcv2_irq_ack,
1083 .control = rk_tsadcv2_control,
1084 .get_temp = rk_tsadcv2_get_temp,
1085 .set_alarm_temp = rk_tsadcv2_alarm_temp,
1086 .set_tshut_temp = rk_tsadcv2_tshut_temp,
1087 .set_tshut_mode = rk_tsadcv2_tshut_mode,
1088
1089 .table = {
1090 .id = rk3368_code_table,
1091 .length = ARRAY_SIZE(rk3368_code_table),
1092 .data_mask = TSADCV3_DATA_MASK,
1093 .mode = ADC_INCREMENT,
1094 },
1095};
1096
1097static const struct rockchip_tsadc_chip rk3399_tsadc_data = {
1098 .chn_id[SENSOR_CPU] = 0, /* cpu sensor is channel 0 */
1099 .chn_id[SENSOR_GPU] = 1, /* gpu sensor is channel 1 */
1100 .chn_num = 2, /* two channels for tsadc */
1101
1102 .tshut_mode = TSHUT_MODE_GPIO, /* default TSHUT via GPIO give PMIC */
1103 .tshut_polarity = TSHUT_LOW_ACTIVE, /* default TSHUT LOW ACTIVE */
1104 .tshut_temp = 95000,
1105
1106 .initialize = rk_tsadcv3_initialize,
1107 .irq_ack = rk_tsadcv3_irq_ack,
1108 .control = rk_tsadcv3_control,
1109 .get_temp = rk_tsadcv2_get_temp,
1110 .set_alarm_temp = rk_tsadcv2_alarm_temp,
1111 .set_tshut_temp = rk_tsadcv2_tshut_temp,
1112 .set_tshut_mode = rk_tsadcv2_tshut_mode,
1113
1114 .table = {
1115 .id = rk3399_code_table,
1116 .length = ARRAY_SIZE(rk3399_code_table),
1117 .data_mask = TSADCV3_DATA_MASK,
1118 .mode = ADC_INCREMENT,
1119 },
1120};
1121
1122static const struct rockchip_tsadc_chip rk3568_tsadc_data = {
1123 .chn_id[SENSOR_CPU] = 0, /* cpu sensor is channel 0 */
1124 .chn_id[SENSOR_GPU] = 1, /* gpu sensor is channel 1 */
1125 .chn_num = 2, /* two channels for tsadc */
1126
1127 .tshut_mode = TSHUT_MODE_GPIO, /* default TSHUT via GPIO give PMIC */
1128 .tshut_polarity = TSHUT_LOW_ACTIVE, /* default TSHUT LOW ACTIVE */
1129 .tshut_temp = 95000,
1130
1131 .initialize = rk_tsadcv7_initialize,
1132 .irq_ack = rk_tsadcv3_irq_ack,
1133 .control = rk_tsadcv3_control,
1134 .get_temp = rk_tsadcv2_get_temp,
1135 .set_alarm_temp = rk_tsadcv2_alarm_temp,
1136 .set_tshut_temp = rk_tsadcv2_tshut_temp,
1137 .set_tshut_mode = rk_tsadcv2_tshut_mode,
1138
1139 .table = {
1140 .id = rk3568_code_table,
1141 .length = ARRAY_SIZE(rk3568_code_table),
1142 .data_mask = TSADCV2_DATA_MASK,
1143 .mode = ADC_INCREMENT,
1144 },
1145};
1146
1147static const struct of_device_id of_rockchip_thermal_match[] = {
1148 { .compatible = "rockchip,px30-tsadc",
1149 .data = (void *)&px30_tsadc_data,
1150 },
1151 {
1152 .compatible = "rockchip,rv1108-tsadc",
1153 .data = (void *)&rv1108_tsadc_data,
1154 },
1155 {
1156 .compatible = "rockchip,rk3228-tsadc",
1157 .data = (void *)&rk3228_tsadc_data,
1158 },
1159 {
1160 .compatible = "rockchip,rk3288-tsadc",
1161 .data = (void *)&rk3288_tsadc_data,
1162 },
1163 {
1164 .compatible = "rockchip,rk3328-tsadc",
1165 .data = (void *)&rk3328_tsadc_data,
1166 },
1167 {
1168 .compatible = "rockchip,rk3366-tsadc",
1169 .data = (void *)&rk3366_tsadc_data,
1170 },
1171 {
1172 .compatible = "rockchip,rk3368-tsadc",
1173 .data = (void *)&rk3368_tsadc_data,
1174 },
1175 {
1176 .compatible = "rockchip,rk3399-tsadc",
1177 .data = (void *)&rk3399_tsadc_data,
1178 },
1179 {
1180 .compatible = "rockchip,rk3568-tsadc",
1181 .data = (void *)&rk3568_tsadc_data,
1182 },
1183 { /* end */ },
1184};
1185MODULE_DEVICE_TABLE(of, of_rockchip_thermal_match);
1186
1187static void
1188rockchip_thermal_toggle_sensor(struct rockchip_thermal_sensor *sensor, bool on)
1189{
1190 struct thermal_zone_device *tzd = sensor->tzd;
1191
1192 if (on)
1193 thermal_zone_device_enable(tzd);
1194 else
1195 thermal_zone_device_disable(tzd);
1196}
1197
1198static irqreturn_t rockchip_thermal_alarm_irq_thread(int irq, void *dev)
1199{
1200 struct rockchip_thermal_data *thermal = dev;
1201 int i;
1202
1203 dev_dbg(&thermal->pdev->dev, "thermal alarm\n");
1204
1205 thermal->chip->irq_ack(thermal->regs);
1206
1207 for (i = 0; i < thermal->chip->chn_num; i++)
1208 thermal_zone_device_update(thermal->sensors[i].tzd,
1209 THERMAL_EVENT_UNSPECIFIED);
1210
1211 return IRQ_HANDLED;
1212}
1213
1214static int rockchip_thermal_set_trips(void *_sensor, int low, int high)
1215{
1216 struct rockchip_thermal_sensor *sensor = _sensor;
1217 struct rockchip_thermal_data *thermal = sensor->thermal;
1218 const struct rockchip_tsadc_chip *tsadc = thermal->chip;
1219
1220 dev_dbg(&thermal->pdev->dev, "%s: sensor %d: low: %d, high %d\n",
1221 __func__, sensor->id, low, high);
1222
1223 return tsadc->set_alarm_temp(&tsadc->table,
1224 sensor->id, thermal->regs, high);
1225}
1226
1227static int rockchip_thermal_get_temp(void *_sensor, int *out_temp)
1228{
1229 struct rockchip_thermal_sensor *sensor = _sensor;
1230 struct rockchip_thermal_data *thermal = sensor->thermal;
1231 const struct rockchip_tsadc_chip *tsadc = sensor->thermal->chip;
1232 int retval;
1233
1234 retval = tsadc->get_temp(&tsadc->table,
1235 sensor->id, thermal->regs, out_temp);
1236 dev_dbg(&thermal->pdev->dev, "sensor %d - temp: %d, retval: %d\n",
1237 sensor->id, *out_temp, retval);
1238
1239 return retval;
1240}
1241
1242static const struct thermal_zone_of_device_ops rockchip_of_thermal_ops = {
1243 .get_temp = rockchip_thermal_get_temp,
1244 .set_trips = rockchip_thermal_set_trips,
1245};
1246
1247static int rockchip_configure_from_dt(struct device *dev,
1248 struct device_node *np,
1249 struct rockchip_thermal_data *thermal)
1250{
1251 u32 shut_temp, tshut_mode, tshut_polarity;
1252
1253 if (of_property_read_u32(np, "rockchip,hw-tshut-temp", &shut_temp)) {
1254 dev_warn(dev,
1255 "Missing tshut temp property, using default %d\n",
1256 thermal->chip->tshut_temp);
1257 thermal->tshut_temp = thermal->chip->tshut_temp;
1258 } else {
1259 if (shut_temp > INT_MAX) {
1260 dev_err(dev, "Invalid tshut temperature specified: %d\n",
1261 shut_temp);
1262 return -ERANGE;
1263 }
1264 thermal->tshut_temp = shut_temp;
1265 }
1266
1267 if (of_property_read_u32(np, "rockchip,hw-tshut-mode", &tshut_mode)) {
1268 dev_warn(dev,
1269 "Missing tshut mode property, using default (%s)\n",
1270 thermal->chip->tshut_mode == TSHUT_MODE_GPIO ?
1271 "gpio" : "cru");
1272 thermal->tshut_mode = thermal->chip->tshut_mode;
1273 } else {
1274 thermal->tshut_mode = tshut_mode;
1275 }
1276
1277 if (thermal->tshut_mode > 1) {
1278 dev_err(dev, "Invalid tshut mode specified: %d\n",
1279 thermal->tshut_mode);
1280 return -EINVAL;
1281 }
1282
1283 if (of_property_read_u32(np, "rockchip,hw-tshut-polarity",
1284 &tshut_polarity)) {
1285 dev_warn(dev,
1286 "Missing tshut-polarity property, using default (%s)\n",
1287 thermal->chip->tshut_polarity == TSHUT_LOW_ACTIVE ?
1288 "low" : "high");
1289 thermal->tshut_polarity = thermal->chip->tshut_polarity;
1290 } else {
1291 thermal->tshut_polarity = tshut_polarity;
1292 }
1293
1294 if (thermal->tshut_polarity > 1) {
1295 dev_err(dev, "Invalid tshut-polarity specified: %d\n",
1296 thermal->tshut_polarity);
1297 return -EINVAL;
1298 }
1299
1300 /* The tsadc wont to handle the error in here since some SoCs didn't
1301 * need this property.
1302 */
1303 thermal->grf = syscon_regmap_lookup_by_phandle(np, "rockchip,grf");
1304 if (IS_ERR(thermal->grf))
1305 dev_warn(dev, "Missing rockchip,grf property\n");
1306
1307 return 0;
1308}
1309
1310static int
1311rockchip_thermal_register_sensor(struct platform_device *pdev,
1312 struct rockchip_thermal_data *thermal,
1313 struct rockchip_thermal_sensor *sensor,
1314 int id)
1315{
1316 const struct rockchip_tsadc_chip *tsadc = thermal->chip;
1317 int error;
1318
1319 tsadc->set_tshut_mode(id, thermal->regs, thermal->tshut_mode);
1320
1321 error = tsadc->set_tshut_temp(&tsadc->table, id, thermal->regs,
1322 thermal->tshut_temp);
1323 if (error)
1324 dev_err(&pdev->dev, "%s: invalid tshut=%d, error=%d\n",
1325 __func__, thermal->tshut_temp, error);
1326
1327 sensor->thermal = thermal;
1328 sensor->id = id;
1329 sensor->tzd = devm_thermal_zone_of_sensor_register(&pdev->dev, id,
1330 sensor, &rockchip_of_thermal_ops);
1331 if (IS_ERR(sensor->tzd)) {
1332 error = PTR_ERR(sensor->tzd);
1333 dev_err(&pdev->dev, "failed to register sensor %d: %d\n",
1334 id, error);
1335 return error;
1336 }
1337
1338 return 0;
1339}
1340
1341/**
1342 * Reset TSADC Controller, reset all tsadc registers.
1343 * @reset: the reset controller of tsadc
1344 */
1345static void rockchip_thermal_reset_controller(struct reset_control *reset)
1346{
1347 reset_control_assert(reset);
1348 usleep_range(10, 20);
1349 reset_control_deassert(reset);
1350}
1351
1352static int rockchip_thermal_probe(struct platform_device *pdev)
1353{
1354 struct device_node *np = pdev->dev.of_node;
1355 struct rockchip_thermal_data *thermal;
1356 const struct of_device_id *match;
1357 struct resource *res;
1358 int irq;
1359 int i;
1360 int error;
1361
1362 match = of_match_node(of_rockchip_thermal_match, np);
1363 if (!match)
1364 return -ENXIO;
1365
1366 irq = platform_get_irq(pdev, 0);
1367 if (irq < 0)
1368 return -EINVAL;
1369
1370 thermal = devm_kzalloc(&pdev->dev, sizeof(struct rockchip_thermal_data),
1371 GFP_KERNEL);
1372 if (!thermal)
1373 return -ENOMEM;
1374
1375 thermal->pdev = pdev;
1376
1377 thermal->chip = (const struct rockchip_tsadc_chip *)match->data;
1378 if (!thermal->chip)
1379 return -EINVAL;
1380
1381 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1382 thermal->regs = devm_ioremap_resource(&pdev->dev, res);
1383 if (IS_ERR(thermal->regs))
1384 return PTR_ERR(thermal->regs);
1385
1386 thermal->reset = devm_reset_control_get(&pdev->dev, "tsadc-apb");
1387 if (IS_ERR(thermal->reset)) {
1388 error = PTR_ERR(thermal->reset);
1389 dev_err(&pdev->dev, "failed to get tsadc reset: %d\n", error);
1390 return error;
1391 }
1392
1393 thermal->clk = devm_clk_get(&pdev->dev, "tsadc");
1394 if (IS_ERR(thermal->clk)) {
1395 error = PTR_ERR(thermal->clk);
1396 dev_err(&pdev->dev, "failed to get tsadc clock: %d\n", error);
1397 return error;
1398 }
1399
1400 thermal->pclk = devm_clk_get(&pdev->dev, "apb_pclk");
1401 if (IS_ERR(thermal->pclk)) {
1402 error = PTR_ERR(thermal->pclk);
1403 dev_err(&pdev->dev, "failed to get apb_pclk clock: %d\n",
1404 error);
1405 return error;
1406 }
1407
1408 error = clk_prepare_enable(thermal->clk);
1409 if (error) {
1410 dev_err(&pdev->dev, "failed to enable converter clock: %d\n",
1411 error);
1412 return error;
1413 }
1414
1415 error = clk_prepare_enable(thermal->pclk);
1416 if (error) {
1417 dev_err(&pdev->dev, "failed to enable pclk: %d\n", error);
1418 goto err_disable_clk;
1419 }
1420
1421 rockchip_thermal_reset_controller(thermal->reset);
1422
1423 error = rockchip_configure_from_dt(&pdev->dev, np, thermal);
1424 if (error) {
1425 dev_err(&pdev->dev, "failed to parse device tree data: %d\n",
1426 error);
1427 goto err_disable_pclk;
1428 }
1429
1430 thermal->chip->initialize(thermal->grf, thermal->regs,
1431 thermal->tshut_polarity);
1432
1433 for (i = 0; i < thermal->chip->chn_num; i++) {
1434 error = rockchip_thermal_register_sensor(pdev, thermal,
1435 &thermal->sensors[i],
1436 thermal->chip->chn_id[i]);
1437 if (error) {
1438 dev_err(&pdev->dev,
1439 "failed to register sensor[%d] : error = %d\n",
1440 i, error);
1441 goto err_disable_pclk;
1442 }
1443 }
1444
1445 error = devm_request_threaded_irq(&pdev->dev, irq, NULL,
1446 &rockchip_thermal_alarm_irq_thread,
1447 IRQF_ONESHOT,
1448 "rockchip_thermal", thermal);
1449 if (error) {
1450 dev_err(&pdev->dev,
1451 "failed to request tsadc irq: %d\n", error);
1452 goto err_disable_pclk;
1453 }
1454
1455 thermal->chip->control(thermal->regs, true);
1456
1457 for (i = 0; i < thermal->chip->chn_num; i++) {
1458 rockchip_thermal_toggle_sensor(&thermal->sensors[i], true);
1459 thermal->sensors[i].tzd->tzp->no_hwmon = false;
1460 error = thermal_add_hwmon_sysfs(thermal->sensors[i].tzd);
1461 if (error)
1462 dev_warn(&pdev->dev,
1463 "failed to register sensor %d with hwmon: %d\n",
1464 i, error);
1465 }
1466
1467 platform_set_drvdata(pdev, thermal);
1468
1469 return 0;
1470
1471err_disable_pclk:
1472 clk_disable_unprepare(thermal->pclk);
1473err_disable_clk:
1474 clk_disable_unprepare(thermal->clk);
1475
1476 return error;
1477}
1478
1479static int rockchip_thermal_remove(struct platform_device *pdev)
1480{
1481 struct rockchip_thermal_data *thermal = platform_get_drvdata(pdev);
1482 int i;
1483
1484 for (i = 0; i < thermal->chip->chn_num; i++) {
1485 struct rockchip_thermal_sensor *sensor = &thermal->sensors[i];
1486
1487 thermal_remove_hwmon_sysfs(sensor->tzd);
1488 rockchip_thermal_toggle_sensor(sensor, false);
1489 }
1490
1491 thermal->chip->control(thermal->regs, false);
1492
1493 clk_disable_unprepare(thermal->pclk);
1494 clk_disable_unprepare(thermal->clk);
1495
1496 return 0;
1497}
1498
1499static int __maybe_unused rockchip_thermal_suspend(struct device *dev)
1500{
1501 struct rockchip_thermal_data *thermal = dev_get_drvdata(dev);
1502 int i;
1503
1504 for (i = 0; i < thermal->chip->chn_num; i++)
1505 rockchip_thermal_toggle_sensor(&thermal->sensors[i], false);
1506
1507 thermal->chip->control(thermal->regs, false);
1508
1509 clk_disable(thermal->pclk);
1510 clk_disable(thermal->clk);
1511
1512 pinctrl_pm_select_sleep_state(dev);
1513
1514 return 0;
1515}
1516
1517static int __maybe_unused rockchip_thermal_resume(struct device *dev)
1518{
1519 struct rockchip_thermal_data *thermal = dev_get_drvdata(dev);
1520 int i;
1521 int error;
1522
1523 error = clk_enable(thermal->clk);
1524 if (error)
1525 return error;
1526
1527 error = clk_enable(thermal->pclk);
1528 if (error) {
1529 clk_disable(thermal->clk);
1530 return error;
1531 }
1532
1533 rockchip_thermal_reset_controller(thermal->reset);
1534
1535 thermal->chip->initialize(thermal->grf, thermal->regs,
1536 thermal->tshut_polarity);
1537
1538 for (i = 0; i < thermal->chip->chn_num; i++) {
1539 int id = thermal->sensors[i].id;
1540
1541 thermal->chip->set_tshut_mode(id, thermal->regs,
1542 thermal->tshut_mode);
1543
1544 error = thermal->chip->set_tshut_temp(&thermal->chip->table,
1545 id, thermal->regs,
1546 thermal->tshut_temp);
1547 if (error)
1548 dev_err(dev, "%s: invalid tshut=%d, error=%d\n",
1549 __func__, thermal->tshut_temp, error);
1550 }
1551
1552 thermal->chip->control(thermal->regs, true);
1553
1554 for (i = 0; i < thermal->chip->chn_num; i++)
1555 rockchip_thermal_toggle_sensor(&thermal->sensors[i], true);
1556
1557 pinctrl_pm_select_default_state(dev);
1558
1559 return 0;
1560}
1561
1562static SIMPLE_DEV_PM_OPS(rockchip_thermal_pm_ops,
1563 rockchip_thermal_suspend, rockchip_thermal_resume);
1564
1565static struct platform_driver rockchip_thermal_driver = {
1566 .driver = {
1567 .name = "rockchip-thermal",
1568 .pm = &rockchip_thermal_pm_ops,
1569 .of_match_table = of_rockchip_thermal_match,
1570 },
1571 .probe = rockchip_thermal_probe,
1572 .remove = rockchip_thermal_remove,
1573};
1574
1575module_platform_driver(rockchip_thermal_driver);
1576
1577MODULE_DESCRIPTION("ROCKCHIP THERMAL Driver");
1578MODULE_AUTHOR("Rockchip, Inc.");
1579MODULE_LICENSE("GPL v2");
1580MODULE_ALIAS("platform:rockchip-thermal");