2 * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd
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.
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
14 #include <linux/clk.h>
15 #include <linux/delay.h>
16 #include <linux/interrupt.h>
18 #include <linux/module.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>
27 * If the temperature over a period of time High,
28 * the resulting TSHUT gave CRU module,let it reset the entire chip,
29 * or via GPIO give PMIC.
37 * the system Temperature Sensors tshut(tshut) polarity
38 * the bit 8 is tshut polarity.
39 * 0: low active, 1: high active
47 * The system has three Temperature Sensors. channel 0 is reserved,
48 * channel 1 is for CPU, and channel 2 is for GPU.
55 struct rockchip_tsadc_chip
{
56 /* The hardware-controlled tshut property */
58 enum tshut_mode tshut_mode
;
59 enum tshut_polarity tshut_polarity
;
61 /* Chip-wide methods */
62 void (*initialize
)(void __iomem
*reg
, enum tshut_polarity p
);
63 void (*irq_ack
)(void __iomem
*reg
);
64 void (*control
)(void __iomem
*reg
, bool on
);
66 /* Per-sensor methods */
67 int (*get_temp
)(int chn
, void __iomem
*reg
, long *temp
);
68 void (*set_tshut_temp
)(int chn
, void __iomem
*reg
, long temp
);
69 void (*set_tshut_mode
)(int chn
, void __iomem
*reg
, enum tshut_mode m
);
72 struct rockchip_thermal_sensor
{
73 struct rockchip_thermal_data
*thermal
;
74 struct thermal_zone_device
*tzd
;
78 #define NUM_SENSORS 2 /* Ignore unused sensor 0 */
80 struct rockchip_thermal_data
{
81 const struct rockchip_tsadc_chip
*chip
;
82 struct platform_device
*pdev
;
83 struct reset_control
*reset
;
85 struct rockchip_thermal_sensor sensors
[NUM_SENSORS
];
93 enum tshut_mode tshut_mode
;
94 enum tshut_polarity tshut_polarity
;
97 /* TSADC V2 Sensor info define: */
98 #define TSADCV2_AUTO_CON 0x04
99 #define TSADCV2_INT_EN 0x08
100 #define TSADCV2_INT_PD 0x0c
101 #define TSADCV2_DATA(chn) (0x20 + (chn) * 0x04)
102 #define TSADCV2_COMP_SHUT(chn) (0x40 + (chn) * 0x04)
103 #define TSADCV2_HIGHT_INT_DEBOUNCE 0x60
104 #define TSADCV2_HIGHT_TSHUT_DEBOUNCE 0x64
105 #define TSADCV2_AUTO_PERIOD 0x68
106 #define TSADCV2_AUTO_PERIOD_HT 0x6c
108 #define TSADCV2_AUTO_EN BIT(0)
109 #define TSADCV2_AUTO_DISABLE ~BIT(0)
110 #define TSADCV2_AUTO_SRC_EN(chn) BIT(4 + (chn))
111 #define TSADCV2_AUTO_TSHUT_POLARITY_HIGH BIT(8)
112 #define TSADCV2_AUTO_TSHUT_POLARITY_LOW ~BIT(8)
114 #define TSADCV2_INT_SRC_EN(chn) BIT(chn)
115 #define TSADCV2_SHUT_2GPIO_SRC_EN(chn) BIT(4 + (chn))
116 #define TSADCV2_SHUT_2CRU_SRC_EN(chn) BIT(8 + (chn))
118 #define TSADCV2_INT_PD_CLEAR ~BIT(8)
120 #define TSADCV2_DATA_MASK 0xfff
121 #define TSADCV2_HIGHT_INT_DEBOUNCE_COUNT 4
122 #define TSADCV2_HIGHT_TSHUT_DEBOUNCE_COUNT 4
123 #define TSADCV2_AUTO_PERIOD_TIME 250 /* msec */
124 #define TSADCV2_AUTO_PERIOD_HT_TIME 50 /* msec */
131 static const struct tsadc_table v2_code_table
[] = {
132 {TSADCV2_DATA_MASK
, -40000},
170 static u32
rk_tsadcv2_temp_to_code(long temp
)
175 high
= ARRAY_SIZE(v2_code_table
) - 1;
176 mid
= (high
+ low
) / 2;
178 if (temp
< v2_code_table
[low
].temp
|| temp
> v2_code_table
[high
].temp
)
181 while (low
<= high
) {
182 if (temp
== v2_code_table
[mid
].temp
)
183 return v2_code_table
[mid
].code
;
184 else if (temp
< v2_code_table
[mid
].temp
)
188 mid
= (low
+ high
) / 2;
194 static long rk_tsadcv2_code_to_temp(u32 code
)
199 high
= ARRAY_SIZE(v2_code_table
) - 1;
200 mid
= (high
+ low
) / 2;
202 if (code
> v2_code_table
[low
].code
|| code
< v2_code_table
[high
].code
)
203 return 125000; /* No code available, return max temperature */
205 while (low
<= high
) {
206 if (code
>= v2_code_table
[mid
].code
&& code
<
207 v2_code_table
[mid
- 1].code
)
208 return v2_code_table
[mid
].temp
;
209 else if (code
< v2_code_table
[mid
].code
)
213 mid
= (low
+ high
) / 2;
220 * rk_tsadcv2_initialize - initialize TASDC Controller
221 * (1) Set TSADCV2_AUTO_PERIOD, configure the interleave between
222 * every two accessing of TSADC in normal operation.
223 * (2) Set TSADCV2_AUTO_PERIOD_HT, configure the interleave between
224 * every two accessing of TSADC after the temperature is higher
225 * than COM_SHUT or COM_INT.
226 * (3) Set TSADCV2_HIGH_INT_DEBOUNCE and TSADC_HIGHT_TSHUT_DEBOUNCE,
227 * if the temperature is higher than COMP_INT or COMP_SHUT for
228 * "debounce" times, TSADC controller will generate interrupt or TSHUT.
230 static void rk_tsadcv2_initialize(void __iomem
*regs
,
231 enum tshut_polarity tshut_polarity
)
233 if (tshut_polarity
== TSHUT_HIGH_ACTIVE
)
234 writel_relaxed(0 | (TSADCV2_AUTO_TSHUT_POLARITY_HIGH
),
235 regs
+ TSADCV2_AUTO_CON
);
237 writel_relaxed(0 | (TSADCV2_AUTO_TSHUT_POLARITY_LOW
),
238 regs
+ TSADCV2_AUTO_CON
);
240 writel_relaxed(TSADCV2_AUTO_PERIOD_TIME
, regs
+ TSADCV2_AUTO_PERIOD
);
241 writel_relaxed(TSADCV2_HIGHT_INT_DEBOUNCE_COUNT
,
242 regs
+ TSADCV2_HIGHT_INT_DEBOUNCE
);
243 writel_relaxed(TSADCV2_AUTO_PERIOD_HT_TIME
,
244 regs
+ TSADCV2_AUTO_PERIOD_HT
);
245 writel_relaxed(TSADCV2_HIGHT_TSHUT_DEBOUNCE_COUNT
,
246 regs
+ TSADCV2_HIGHT_TSHUT_DEBOUNCE
);
249 static void rk_tsadcv2_irq_ack(void __iomem
*regs
)
253 val
= readl_relaxed(regs
+ TSADCV2_INT_PD
);
254 writel_relaxed(val
& TSADCV2_INT_PD_CLEAR
, regs
+ TSADCV2_INT_PD
);
257 static void rk_tsadcv2_control(void __iomem
*regs
, bool enable
)
261 val
= readl_relaxed(regs
+ TSADCV2_AUTO_CON
);
263 val
|= TSADCV2_AUTO_EN
;
265 val
&= ~TSADCV2_AUTO_EN
;
267 writel_relaxed(val
, regs
+ TSADCV2_AUTO_CON
);
270 static int rk_tsadcv2_get_temp(int chn
, void __iomem
*regs
, long *temp
)
274 /* the A/D value of the channel last conversion need some time */
275 val
= readl_relaxed(regs
+ TSADCV2_DATA(chn
));
279 *temp
= rk_tsadcv2_code_to_temp(val
);
284 static void rk_tsadcv2_tshut_temp(int chn
, void __iomem
*regs
, long temp
)
286 u32 tshut_value
, val
;
288 tshut_value
= rk_tsadcv2_temp_to_code(temp
);
289 writel_relaxed(tshut_value
, regs
+ TSADCV2_COMP_SHUT(chn
));
291 /* TSHUT will be valid */
292 val
= readl_relaxed(regs
+ TSADCV2_AUTO_CON
);
293 writel_relaxed(val
| TSADCV2_AUTO_SRC_EN(chn
), regs
+ TSADCV2_AUTO_CON
);
296 static void rk_tsadcv2_tshut_mode(int chn
, void __iomem
*regs
,
297 enum tshut_mode mode
)
301 val
= readl_relaxed(regs
+ TSADCV2_INT_EN
);
302 if (mode
== TSHUT_MODE_GPIO
) {
303 val
&= ~TSADCV2_SHUT_2CRU_SRC_EN(chn
);
304 val
|= TSADCV2_SHUT_2GPIO_SRC_EN(chn
);
306 val
&= ~TSADCV2_SHUT_2GPIO_SRC_EN(chn
);
307 val
|= TSADCV2_SHUT_2CRU_SRC_EN(chn
);
310 writel_relaxed(val
, regs
+ TSADCV2_INT_EN
);
313 static const struct rockchip_tsadc_chip rk3288_tsadc_data
= {
314 .tshut_mode
= TSHUT_MODE_GPIO
, /* default TSHUT via GPIO give PMIC */
315 .tshut_polarity
= TSHUT_LOW_ACTIVE
, /* default TSHUT LOW ACTIVE */
318 .initialize
= rk_tsadcv2_initialize
,
319 .irq_ack
= rk_tsadcv2_irq_ack
,
320 .control
= rk_tsadcv2_control
,
321 .get_temp
= rk_tsadcv2_get_temp
,
322 .set_tshut_temp
= rk_tsadcv2_tshut_temp
,
323 .set_tshut_mode
= rk_tsadcv2_tshut_mode
,
326 static const struct of_device_id of_rockchip_thermal_match
[] = {
328 .compatible
= "rockchip,rk3288-tsadc",
329 .data
= (void *)&rk3288_tsadc_data
,
333 MODULE_DEVICE_TABLE(of
, of_rockchip_thermal_match
);
336 rockchip_thermal_toggle_sensor(struct rockchip_thermal_sensor
*sensor
, bool on
)
338 struct thermal_zone_device
*tzd
= sensor
->tzd
;
340 tzd
->ops
->set_mode(tzd
,
341 on
? THERMAL_DEVICE_ENABLED
: THERMAL_DEVICE_DISABLED
);
344 static irqreturn_t
rockchip_thermal_alarm_irq_thread(int irq
, void *dev
)
346 struct rockchip_thermal_data
*thermal
= dev
;
349 dev_dbg(&thermal
->pdev
->dev
, "thermal alarm\n");
351 thermal
->chip
->irq_ack(thermal
->regs
);
353 for (i
= 0; i
< ARRAY_SIZE(thermal
->sensors
); i
++)
354 thermal_zone_device_update(thermal
->sensors
[i
].tzd
);
359 static int rockchip_thermal_get_temp(void *_sensor
, long *out_temp
)
361 struct rockchip_thermal_sensor
*sensor
= _sensor
;
362 struct rockchip_thermal_data
*thermal
= sensor
->thermal
;
363 const struct rockchip_tsadc_chip
*tsadc
= sensor
->thermal
->chip
;
366 retval
= tsadc
->get_temp(sensor
->id
, thermal
->regs
, out_temp
);
367 dev_dbg(&thermal
->pdev
->dev
, "sensor %d - temp: %ld, retval: %d\n",
368 sensor
->id
, *out_temp
, retval
);
373 static const struct thermal_zone_of_device_ops rockchip_of_thermal_ops
= {
374 .get_temp
= rockchip_thermal_get_temp
,
377 static int rockchip_configure_from_dt(struct device
*dev
,
378 struct device_node
*np
,
379 struct rockchip_thermal_data
*thermal
)
381 u32 shut_temp
, tshut_mode
, tshut_polarity
;
383 if (of_property_read_u32(np
, "rockchip,hw-tshut-temp", &shut_temp
)) {
385 "Missing tshut temp property, using default %ld\n",
386 thermal
->chip
->tshut_temp
);
387 thermal
->tshut_temp
= thermal
->chip
->tshut_temp
;
389 thermal
->tshut_temp
= shut_temp
;
392 if (thermal
->tshut_temp
> INT_MAX
) {
393 dev_err(dev
, "Invalid tshut temperature specified: %ld\n",
394 thermal
->tshut_temp
);
398 if (of_property_read_u32(np
, "rockchip,hw-tshut-mode", &tshut_mode
)) {
400 "Missing tshut mode property, using default (%s)\n",
401 thermal
->chip
->tshut_mode
== TSHUT_MODE_GPIO
?
403 thermal
->tshut_mode
= thermal
->chip
->tshut_mode
;
405 thermal
->tshut_mode
= tshut_mode
;
408 if (thermal
->tshut_mode
> 1) {
409 dev_err(dev
, "Invalid tshut mode specified: %d\n",
410 thermal
->tshut_mode
);
414 if (of_property_read_u32(np
, "rockchip,hw-tshut-polarity",
417 "Missing tshut-polarity property, using default (%s)\n",
418 thermal
->chip
->tshut_polarity
== TSHUT_LOW_ACTIVE
?
420 thermal
->tshut_polarity
= thermal
->chip
->tshut_polarity
;
422 thermal
->tshut_polarity
= tshut_polarity
;
425 if (thermal
->tshut_polarity
> 1) {
426 dev_err(dev
, "Invalid tshut-polarity specified: %d\n",
427 thermal
->tshut_polarity
);
435 rockchip_thermal_register_sensor(struct platform_device
*pdev
,
436 struct rockchip_thermal_data
*thermal
,
437 struct rockchip_thermal_sensor
*sensor
,
440 const struct rockchip_tsadc_chip
*tsadc
= thermal
->chip
;
443 tsadc
->set_tshut_mode(id
, thermal
->regs
, thermal
->tshut_mode
);
444 tsadc
->set_tshut_temp(id
, thermal
->regs
, thermal
->tshut_temp
);
446 sensor
->thermal
= thermal
;
448 sensor
->tzd
= thermal_zone_of_sensor_register(&pdev
->dev
, id
, sensor
,
449 &rockchip_of_thermal_ops
);
450 if (IS_ERR(sensor
->tzd
)) {
451 error
= PTR_ERR(sensor
->tzd
);
452 dev_err(&pdev
->dev
, "failed to register sensor %d: %d\n",
461 * Reset TSADC Controller, reset all tsadc registers.
463 static void rockchip_thermal_reset_controller(struct reset_control
*reset
)
465 reset_control_assert(reset
);
466 usleep_range(10, 20);
467 reset_control_deassert(reset
);
470 static int rockchip_thermal_probe(struct platform_device
*pdev
)
472 struct device_node
*np
= pdev
->dev
.of_node
;
473 struct rockchip_thermal_data
*thermal
;
474 const struct of_device_id
*match
;
475 struct resource
*res
;
480 match
= of_match_node(of_rockchip_thermal_match
, np
);
484 irq
= platform_get_irq(pdev
, 0);
486 dev_err(&pdev
->dev
, "no irq resource?\n");
490 thermal
= devm_kzalloc(&pdev
->dev
, sizeof(struct rockchip_thermal_data
),
495 thermal
->pdev
= pdev
;
497 thermal
->chip
= (const struct rockchip_tsadc_chip
*)match
->data
;
501 res
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
502 thermal
->regs
= devm_ioremap_resource(&pdev
->dev
, res
);
503 if (IS_ERR(thermal
->regs
))
504 return PTR_ERR(thermal
->regs
);
506 thermal
->reset
= devm_reset_control_get(&pdev
->dev
, "tsadc-apb");
507 if (IS_ERR(thermal
->reset
)) {
508 error
= PTR_ERR(thermal
->reset
);
509 dev_err(&pdev
->dev
, "failed to get tsadc reset: %d\n", error
);
513 thermal
->clk
= devm_clk_get(&pdev
->dev
, "tsadc");
514 if (IS_ERR(thermal
->clk
)) {
515 error
= PTR_ERR(thermal
->clk
);
516 dev_err(&pdev
->dev
, "failed to get tsadc clock: %d\n", error
);
520 thermal
->pclk
= devm_clk_get(&pdev
->dev
, "apb_pclk");
521 if (IS_ERR(thermal
->pclk
)) {
522 error
= PTR_ERR(thermal
->clk
);
523 dev_err(&pdev
->dev
, "failed to get apb_pclk clock: %d\n",
528 error
= clk_prepare_enable(thermal
->clk
);
530 dev_err(&pdev
->dev
, "failed to enable converter clock: %d\n",
535 error
= clk_prepare_enable(thermal
->pclk
);
537 dev_err(&pdev
->dev
, "failed to enable pclk: %d\n", error
);
538 goto err_disable_clk
;
541 rockchip_thermal_reset_controller(thermal
->reset
);
543 error
= rockchip_configure_from_dt(&pdev
->dev
, np
, thermal
);
545 dev_err(&pdev
->dev
, "failed to parse device tree data: %d\n",
547 goto err_disable_pclk
;
550 thermal
->chip
->initialize(thermal
->regs
, thermal
->tshut_polarity
);
552 error
= rockchip_thermal_register_sensor(pdev
, thermal
,
553 &thermal
->sensors
[0],
557 "failed to register CPU thermal sensor: %d\n", error
);
558 goto err_disable_pclk
;
561 error
= rockchip_thermal_register_sensor(pdev
, thermal
,
562 &thermal
->sensors
[1],
566 "failed to register GPU thermal sensor: %d\n", error
);
567 goto err_unregister_cpu_sensor
;
570 error
= devm_request_threaded_irq(&pdev
->dev
, irq
, NULL
,
571 &rockchip_thermal_alarm_irq_thread
,
573 "rockchip_thermal", thermal
);
576 "failed to request tsadc irq: %d\n", error
);
577 goto err_unregister_gpu_sensor
;
580 thermal
->chip
->control(thermal
->regs
, true);
582 for (i
= 0; i
< ARRAY_SIZE(thermal
->sensors
); i
++)
583 rockchip_thermal_toggle_sensor(&thermal
->sensors
[i
], true);
585 platform_set_drvdata(pdev
, thermal
);
589 err_unregister_gpu_sensor
:
590 thermal_zone_of_sensor_unregister(&pdev
->dev
, thermal
->sensors
[1].tzd
);
591 err_unregister_cpu_sensor
:
592 thermal_zone_of_sensor_unregister(&pdev
->dev
, thermal
->sensors
[0].tzd
);
594 clk_disable_unprepare(thermal
->pclk
);
596 clk_disable_unprepare(thermal
->clk
);
601 static int rockchip_thermal_remove(struct platform_device
*pdev
)
603 struct rockchip_thermal_data
*thermal
= platform_get_drvdata(pdev
);
606 for (i
= 0; i
< ARRAY_SIZE(thermal
->sensors
); i
++) {
607 struct rockchip_thermal_sensor
*sensor
= &thermal
->sensors
[i
];
609 rockchip_thermal_toggle_sensor(sensor
, false);
610 thermal_zone_of_sensor_unregister(&pdev
->dev
, sensor
->tzd
);
613 thermal
->chip
->control(thermal
->regs
, false);
615 clk_disable_unprepare(thermal
->pclk
);
616 clk_disable_unprepare(thermal
->clk
);
621 static int __maybe_unused
rockchip_thermal_suspend(struct device
*dev
)
623 struct platform_device
*pdev
= to_platform_device(dev
);
624 struct rockchip_thermal_data
*thermal
= platform_get_drvdata(pdev
);
627 for (i
= 0; i
< ARRAY_SIZE(thermal
->sensors
); i
++)
628 rockchip_thermal_toggle_sensor(&thermal
->sensors
[i
], false);
630 thermal
->chip
->control(thermal
->regs
, false);
632 clk_disable(thermal
->pclk
);
633 clk_disable(thermal
->clk
);
638 static int __maybe_unused
rockchip_thermal_resume(struct device
*dev
)
640 struct platform_device
*pdev
= to_platform_device(dev
);
641 struct rockchip_thermal_data
*thermal
= platform_get_drvdata(pdev
);
645 error
= clk_enable(thermal
->clk
);
649 error
= clk_enable(thermal
->pclk
);
653 rockchip_thermal_reset_controller(thermal
->reset
);
655 thermal
->chip
->initialize(thermal
->regs
, thermal
->tshut_polarity
);
657 for (i
= 0; i
< ARRAY_SIZE(thermal
->sensors
); i
++) {
658 enum sensor_id id
= thermal
->sensors
[i
].id
;
660 thermal
->chip
->set_tshut_mode(id
, thermal
->regs
,
661 thermal
->tshut_mode
);
662 thermal
->chip
->set_tshut_temp(id
, thermal
->regs
,
663 thermal
->tshut_temp
);
666 thermal
->chip
->control(thermal
->regs
, true);
668 for (i
= 0; i
< ARRAY_SIZE(thermal
->sensors
); i
++)
669 rockchip_thermal_toggle_sensor(&thermal
->sensors
[i
], true);
674 static SIMPLE_DEV_PM_OPS(rockchip_thermal_pm_ops
,
675 rockchip_thermal_suspend
, rockchip_thermal_resume
);
677 static struct platform_driver rockchip_thermal_driver
= {
679 .name
= "rockchip-thermal",
680 .owner
= THIS_MODULE
,
681 .pm
= &rockchip_thermal_pm_ops
,
682 .of_match_table
= of_rockchip_thermal_match
,
684 .probe
= rockchip_thermal_probe
,
685 .remove
= rockchip_thermal_remove
,
688 module_platform_driver(rockchip_thermal_driver
);
690 MODULE_DESCRIPTION("ROCKCHIP THERMAL Driver");
691 MODULE_AUTHOR("Rockchip, Inc.");
692 MODULE_LICENSE("GPL v2");
693 MODULE_ALIAS("platform:rockchip-thermal");