1 // SPDX-License-Identifier: GPL-2.0-only
3  * Copyright (c) 2014-2016, Fuzhou Rockchip Electronics Co., Ltd
4  * Caesar Wang <wxt@rock-chips.com>
17 #include <linux/reset.h>
24  * the resulting TSHUT gave CRU module,let it reset the entire chip,
35  * 0: low active, 1: high active
70  * struct chip_tsadc_table - hold information about chip-specific differences
84  * struct rockchip_tsadc_chip - hold the private data 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)
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
104 	/* The hardware-controlled tshut property */
109 	/* Chip-wide methods */
115 	/* Per-sensor methods */
124 	/* Per-table methods */
129  * struct rockchip_thermal_sensor - hold the information of thermal sensor
141  * struct rockchip_thermal_data - hold the private data of thermal driver
144  * @reset: the reset controller of tsadc
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)
157 	struct reset_control *reset;  member
230  * struct tsadc_table - code to temperature conversion table
245 	{0, -40000},
246 	{374, -40000},
247 	{382, -35000},
248 	{389, -30000},
249 	{397, -25000},
250 	{405, -20000},
251 	{413, -15000},
252 	{421, -10000},
253 	{429, -5000},
284 	{0, -40000},
285 	{588, -40000},
286 	{593, -35000},
287 	{598, -30000},
288 	{603, -25000},
289 	{608, -20000},
290 	{613, -15000},
291 	{618, -10000},
292 	{623, -5000},
323 	{TSADCV2_DATA_MASK, -40000},
324 	{3800, -40000},
325 	{3792, -35000},
326 	{3783, -30000},
327 	{3774, -25000},
328 	{3765, -20000},
329 	{3756, -15000},
330 	{3747, -10000},
331 	{3737, -5000},
362 	{0, -40000},
363 	{296, -40000},
364 	{304, -35000},
365 	{313, -30000},
366 	{331, -20000},
367 	{340, -15000},
368 	{349, -10000},
369 	{359, -5000},
400 	{0, -40000},
401 	{106, -40000},
402 	{108, -35000},
403 	{110, -30000},
404 	{112, -25000},
405 	{114, -20000},
406 	{116, -15000},
407 	{118, -10000},
408 	{120, -5000},
439 	{0, -40000},
440 	{402, -40000},
441 	{410, -35000},
442 	{419, -30000},
443 	{427, -25000},
444 	{436, -20000},
445 	{444, -15000},
446 	{453, -10000},
447 	{461, -5000},
480 	int high, low, mid;  in rk_tsadcv2_temp_to_code()  local
483 	u32 error = table->data_mask;  in rk_tsadcv2_temp_to_code()
485 	low = 0;  in rk_tsadcv2_temp_to_code()
486 	high = (table->length - 1) - 1; /* ignore the last check for table */  in rk_tsadcv2_temp_to_code()
487 	mid = (high + low) / 2;  in rk_tsadcv2_temp_to_code()
490 	if (temp < table->id[low].temp || temp > table->id[high].temp)  in rk_tsadcv2_temp_to_code()
493 	while (low <= high) {  in rk_tsadcv2_temp_to_code()
494 		if (temp == table->id[mid].temp)  in rk_tsadcv2_temp_to_code()
495 			return table->id[mid].code;  in rk_tsadcv2_temp_to_code()
496 		else if (temp < table->id[mid].temp)  in rk_tsadcv2_temp_to_code()
497 			high = mid - 1;  in rk_tsadcv2_temp_to_code()
499 			low = mid + 1;  in rk_tsadcv2_temp_to_code()
500 		mid = (low + high) / 2;  in rk_tsadcv2_temp_to_code()
509 	num = abs(table->id[mid + 1].code - table->id[mid].code);  in rk_tsadcv2_temp_to_code()
510 	num *= temp - table->id[mid].temp;  in rk_tsadcv2_temp_to_code()
511 	denom = table->id[mid + 1].temp - table->id[mid].temp;  in rk_tsadcv2_temp_to_code()
513 	switch (table->mode) {  in rk_tsadcv2_temp_to_code()
515 		return table->id[mid].code - (num / denom);  in rk_tsadcv2_temp_to_code()
517 		return table->id[mid].code + (num / denom);  in rk_tsadcv2_temp_to_code()
519 		pr_err("%s: unknown table mode: %d\n", __func__, table->mode);  in rk_tsadcv2_temp_to_code()
532 	unsigned int low = 1;  in rk_tsadcv2_code_to_temp()  local
533 	unsigned int high = table->length - 1;  in rk_tsadcv2_code_to_temp()
534 	unsigned int mid = (low + high) / 2;  in rk_tsadcv2_code_to_temp()
538 	WARN_ON(table->length < 2);  in rk_tsadcv2_code_to_temp()
540 	switch (table->mode) {  in rk_tsadcv2_code_to_temp()
542 		code &= table->data_mask;  in rk_tsadcv2_code_to_temp()
543 		if (code <= table->id[high].code)  in rk_tsadcv2_code_to_temp()
544 			return -EAGAIN;		/* Incorrect reading */  in rk_tsadcv2_code_to_temp()
546 		while (low <= high) {  in rk_tsadcv2_code_to_temp()
547 			if (code >= table->id[mid].code &&  in rk_tsadcv2_code_to_temp()
548 			    code < table->id[mid - 1].code)  in rk_tsadcv2_code_to_temp()
550 			else if (code < table->id[mid].code)  in rk_tsadcv2_code_to_temp()
551 				low = mid + 1;  in rk_tsadcv2_code_to_temp()
553 				high = mid - 1;  in rk_tsadcv2_code_to_temp()
555 			mid = (low + high) / 2;  in rk_tsadcv2_code_to_temp()
559 		code &= table->data_mask;  in rk_tsadcv2_code_to_temp()
560 		if (code < table->id[low].code)  in rk_tsadcv2_code_to_temp()
561 			return -EAGAIN;		/* Incorrect reading */  in rk_tsadcv2_code_to_temp()
563 		while (low <= high) {  in rk_tsadcv2_code_to_temp()
564 			if (code <= table->id[mid].code &&  in rk_tsadcv2_code_to_temp()
565 			    code > table->id[mid - 1].code)  in rk_tsadcv2_code_to_temp()
567 			else if (code > table->id[mid].code)  in rk_tsadcv2_code_to_temp()
568 				low = mid + 1;  in rk_tsadcv2_code_to_temp()
570 				high = mid - 1;  in rk_tsadcv2_code_to_temp()
572 			mid = (low + high) / 2;  in rk_tsadcv2_code_to_temp()
576 		pr_err("%s: unknown table mode: %d\n", __func__, table->mode);  in rk_tsadcv2_code_to_temp()
577 		return -EINVAL;  in rk_tsadcv2_code_to_temp()
586 	num = table->id[mid].temp - table->id[mid - 1].temp;  in rk_tsadcv2_code_to_temp()
587 	num *= abs(table->id[mid - 1].code - code);  in rk_tsadcv2_code_to_temp()
588 	denom = abs(table->id[mid - 1].code - table->id[mid].code);  in rk_tsadcv2_code_to_temp()
589 	*temp = table->id[mid - 1].temp + (num / denom);  in rk_tsadcv2_code_to_temp()
595  * rk_tsadcv2_initialize - initialize TASDC Controller.
598  * @tshut_polarity: the hardware-controlled active polarity (0:LOW 1:HIGH)
632  * rk_tsadcv3_initialize - initialize TASDC Controller.
635  * @tshut_polarity: the hardware-controlled active polarity (0:LOW 1:HIGH)
734  * rk_tsadcv3_control - the tsadc controller is enabled or disabled.
739  * tsadc_q_sel bit on TSADCV2_AUTO_CON[1]. The (1024 - tsadc_q) as output
773 	 * set_trips will pass {-INT_MAX, INT_MAX} to trigger tsadc alarm  in rk_tsadcv2_alarm_temp()
786 	if (alarm_value == table->data_mask)  in rk_tsadcv2_alarm_temp()
787 		return -ERANGE;  in rk_tsadcv2_alarm_temp()
789 	writel_relaxed(alarm_value & table->data_mask,  in rk_tsadcv2_alarm_temp()
806 	if (tshut_value == table->data_mask)  in rk_tsadcv2_tshut_temp()
807 		return -ERANGE;  in rk_tsadcv2_tshut_temp()
864 	.tshut_polarity = TSHUT_LOW_ACTIVE, /* default TSHUT LOW ACTIVE */
888 	.tshut_polarity = TSHUT_LOW_ACTIVE, /* default TSHUT LOW ACTIVE */
913 	.tshut_polarity = TSHUT_LOW_ACTIVE, /* default TSHUT LOW ACTIVE */
961 	.tshut_polarity = TSHUT_LOW_ACTIVE, /* default TSHUT LOW ACTIVE */
986 	.tshut_polarity = TSHUT_LOW_ACTIVE, /* default TSHUT LOW ACTIVE */
1011 	.tshut_polarity = TSHUT_LOW_ACTIVE, /* default TSHUT LOW ACTIVE */
1031 	{	.compatible = "rockchip,px30-tsadc",
1035 		.compatible = "rockchip,rv1108-tsadc",
1039 		.compatible = "rockchip,rk3228-tsadc",
1043 		.compatible = "rockchip,rk3288-tsadc",
1047 		.compatible = "rockchip,rk3328-tsadc",
1051 		.compatible = "rockchip,rk3366-tsadc",
1055 		.compatible = "rockchip,rk3368-tsadc",
1059 		.compatible = "rockchip,rk3399-tsadc",
1069 	struct thermal_zone_device *tzd = sensor->tzd;  in rockchip_thermal_toggle_sensor()
1082 	dev_dbg(&thermal->pdev->dev, "thermal alarm\n");  in rockchip_thermal_alarm_irq_thread()
1084 	thermal->chip->irq_ack(thermal->regs);  in rockchip_thermal_alarm_irq_thread()
1086 	for (i = 0; i < thermal->chip->chn_num; i++)  in rockchip_thermal_alarm_irq_thread()
1087 		thermal_zone_device_update(thermal->sensors[i].tzd,  in rockchip_thermal_alarm_irq_thread()
1093 static int rockchip_thermal_set_trips(void *_sensor, int low, int high)  in rockchip_thermal_set_trips()  argument
1096 	struct rockchip_thermal_data *thermal = sensor->thermal;  in rockchip_thermal_set_trips()
1097 	const struct rockchip_tsadc_chip *tsadc = thermal->chip;  in rockchip_thermal_set_trips()
1099 	dev_dbg(&thermal->pdev->dev, "%s: sensor %d: low: %d, high %d\n",  in rockchip_thermal_set_trips()
1100 		__func__, sensor->id, low, high);  in rockchip_thermal_set_trips()
1102 	return tsadc->set_alarm_temp(&tsadc->table,  in rockchip_thermal_set_trips()
1103 				     sensor->id, thermal->regs, high);  in rockchip_thermal_set_trips()
1109 	struct rockchip_thermal_data *thermal = sensor->thermal;  in rockchip_thermal_get_temp()
1110 	const struct rockchip_tsadc_chip *tsadc = sensor->thermal->chip;  in rockchip_thermal_get_temp()
1113 	retval = tsadc->get_temp(&tsadc->table,  in rockchip_thermal_get_temp()
1114 				 sensor->id, thermal->regs, out_temp);  in rockchip_thermal_get_temp()
1115 	dev_dbg(&thermal->pdev->dev, "sensor %d - temp: %d, retval: %d\n",  in rockchip_thermal_get_temp()
1116 		sensor->id, *out_temp, retval);  in rockchip_thermal_get_temp()
1132 	if (of_property_read_u32(np, "rockchip,hw-tshut-temp", &shut_temp)) {  in rockchip_configure_from_dt()
1135 			 thermal->chip->tshut_temp);  in rockchip_configure_from_dt()
1136 		thermal->tshut_temp = thermal->chip->tshut_temp;  in rockchip_configure_from_dt()
1141 			return -ERANGE;  in rockchip_configure_from_dt()
1143 		thermal->tshut_temp = shut_temp;  in rockchip_configure_from_dt()
1146 	if (of_property_read_u32(np, "rockchip,hw-tshut-mode", &tshut_mode)) {  in rockchip_configure_from_dt()
1149 			 thermal->chip->tshut_mode == TSHUT_MODE_GPIO ?  in rockchip_configure_from_dt()
1151 		thermal->tshut_mode = thermal->chip->tshut_mode;  in rockchip_configure_from_dt()
1153 		thermal->tshut_mode = tshut_mode;  in rockchip_configure_from_dt()
1156 	if (thermal->tshut_mode > 1) {  in rockchip_configure_from_dt()
1158 			thermal->tshut_mode);  in rockchip_configure_from_dt()
1159 		return -EINVAL;  in rockchip_configure_from_dt()
1162 	if (of_property_read_u32(np, "rockchip,hw-tshut-polarity",  in rockchip_configure_from_dt()
1165 			 "Missing tshut-polarity property, using default (%s)\n",  in rockchip_configure_from_dt()
1166 			 thermal->chip->tshut_polarity == TSHUT_LOW_ACTIVE ?  in rockchip_configure_from_dt()
1167 				"low" : "high");  in rockchip_configure_from_dt()
1168 		thermal->tshut_polarity = thermal->chip->tshut_polarity;  in rockchip_configure_from_dt()
1170 		thermal->tshut_polarity = tshut_polarity;  in rockchip_configure_from_dt()
1173 	if (thermal->tshut_polarity > 1) {  in rockchip_configure_from_dt()
1174 		dev_err(dev, "Invalid tshut-polarity specified: %d\n",  in rockchip_configure_from_dt()
1175 			thermal->tshut_polarity);  in rockchip_configure_from_dt()
1176 		return -EINVAL;  in rockchip_configure_from_dt()
1182 	thermal->grf = syscon_regmap_lookup_by_phandle(np, "rockchip,grf");  in rockchip_configure_from_dt()
1183 	if (IS_ERR(thermal->grf))  in rockchip_configure_from_dt()
1195 	const struct rockchip_tsadc_chip *tsadc = thermal->chip;  in rockchip_thermal_register_sensor()
1198 	tsadc->set_tshut_mode(id, thermal->regs, thermal->tshut_mode);  in rockchip_thermal_register_sensor()
1200 	error = tsadc->set_tshut_temp(&tsadc->table, id, thermal->regs,  in rockchip_thermal_register_sensor()
1201 			      thermal->tshut_temp);  in rockchip_thermal_register_sensor()
1203 		dev_err(&pdev->dev, "%s: invalid tshut=%d, error=%d\n",  in rockchip_thermal_register_sensor()
1204 			__func__, thermal->tshut_temp, error);  in rockchip_thermal_register_sensor()
1206 	sensor->thermal = thermal;  in rockchip_thermal_register_sensor()
1207 	sensor->id = id;  in rockchip_thermal_register_sensor()
1208 	sensor->tzd = devm_thermal_zone_of_sensor_register(&pdev->dev, id,  in rockchip_thermal_register_sensor()
1210 	if (IS_ERR(sensor->tzd)) {  in rockchip_thermal_register_sensor()
1211 		error = PTR_ERR(sensor->tzd);  in rockchip_thermal_register_sensor()
1212 		dev_err(&pdev->dev, "failed to register sensor %d: %d\n",  in rockchip_thermal_register_sensor()
1221  * Reset TSADC Controller, reset all tsadc registers.
1222  * @reset: the reset controller of tsadc
1224 static void rockchip_thermal_reset_controller(struct reset_control *reset)  in rockchip_thermal_reset_controller()  argument
1226 	reset_control_assert(reset);  in rockchip_thermal_reset_controller()
1228 	reset_control_deassert(reset);  in rockchip_thermal_reset_controller()
1233 	struct device_node *np = pdev->dev.of_node;  in rockchip_thermal_probe()
1243 		return -ENXIO;  in rockchip_thermal_probe()
1247 		return -EINVAL;  in rockchip_thermal_probe()
1249 	thermal = devm_kzalloc(&pdev->dev, sizeof(struct rockchip_thermal_data),  in rockchip_thermal_probe()
1252 		return -ENOMEM;  in rockchip_thermal_probe()
1254 	thermal->pdev = pdev;  in rockchip_thermal_probe()
1256 	thermal->chip = (const struct rockchip_tsadc_chip *)match->data;  in rockchip_thermal_probe()
1257 	if (!thermal->chip)  in rockchip_thermal_probe()
1258 		return -EINVAL;  in rockchip_thermal_probe()
1261 	thermal->regs = devm_ioremap_resource(&pdev->dev, res);  in rockchip_thermal_probe()
1262 	if (IS_ERR(thermal->regs))  in rockchip_thermal_probe()
1263 		return PTR_ERR(thermal->regs);  in rockchip_thermal_probe()
1265 	thermal->reset = devm_reset_control_get(&pdev->dev, "tsadc-apb");  in rockchip_thermal_probe()
1266 	if (IS_ERR(thermal->reset)) {  in rockchip_thermal_probe()
1267 		error = PTR_ERR(thermal->reset);  in rockchip_thermal_probe()
1268 		dev_err(&pdev->dev, "failed to get tsadc reset: %d\n", error);  in rockchip_thermal_probe()
1272 	thermal->clk = devm_clk_get(&pdev->dev, "tsadc");  in rockchip_thermal_probe()
1273 	if (IS_ERR(thermal->clk)) {  in rockchip_thermal_probe()
1274 		error = PTR_ERR(thermal->clk);  in rockchip_thermal_probe()
1275 		dev_err(&pdev->dev, "failed to get tsadc clock: %d\n", error);  in rockchip_thermal_probe()
1279 	thermal->pclk = devm_clk_get(&pdev->dev, "apb_pclk");  in rockchip_thermal_probe()
1280 	if (IS_ERR(thermal->pclk)) {  in rockchip_thermal_probe()
1281 		error = PTR_ERR(thermal->pclk);  in rockchip_thermal_probe()
1282 		dev_err(&pdev->dev, "failed to get apb_pclk clock: %d\n",  in rockchip_thermal_probe()
1287 	error = clk_prepare_enable(thermal->clk);  in rockchip_thermal_probe()
1289 		dev_err(&pdev->dev, "failed to enable converter clock: %d\n",  in rockchip_thermal_probe()
1294 	error = clk_prepare_enable(thermal->pclk);  in rockchip_thermal_probe()
1296 		dev_err(&pdev->dev, "failed to enable pclk: %d\n", error);  in rockchip_thermal_probe()
1300 	rockchip_thermal_reset_controller(thermal->reset);  in rockchip_thermal_probe()
1302 	error = rockchip_configure_from_dt(&pdev->dev, np, thermal);  in rockchip_thermal_probe()
1304 		dev_err(&pdev->dev, "failed to parse device tree data: %d\n",  in rockchip_thermal_probe()
1309 	thermal->chip->initialize(thermal->grf, thermal->regs,  in rockchip_thermal_probe()
1310 				  thermal->tshut_polarity);  in rockchip_thermal_probe()
1312 	for (i = 0; i < thermal->chip->chn_num; i++) {  in rockchip_thermal_probe()
1314 						&thermal->sensors[i],  in rockchip_thermal_probe()
1315 						thermal->chip->chn_id[i]);  in rockchip_thermal_probe()
1317 			dev_err(&pdev->dev,  in rockchip_thermal_probe()
1324 	error = devm_request_threaded_irq(&pdev->dev, irq, NULL,  in rockchip_thermal_probe()
1329 		dev_err(&pdev->dev,  in rockchip_thermal_probe()
1334 	thermal->chip->control(thermal->regs, true);  in rockchip_thermal_probe()
1336 	for (i = 0; i < thermal->chip->chn_num; i++) {  in rockchip_thermal_probe()
1337 		rockchip_thermal_toggle_sensor(&thermal->sensors[i], true);  in rockchip_thermal_probe()
1338 		thermal->sensors[i].tzd->tzp->no_hwmon = false;  in rockchip_thermal_probe()
1339 		error = thermal_add_hwmon_sysfs(thermal->sensors[i].tzd);  in rockchip_thermal_probe()
1341 			dev_warn(&pdev->dev,  in rockchip_thermal_probe()
1351 	clk_disable_unprepare(thermal->pclk);  in rockchip_thermal_probe()
1353 	clk_disable_unprepare(thermal->clk);  in rockchip_thermal_probe()
1363 	for (i = 0; i < thermal->chip->chn_num; i++) {  in rockchip_thermal_remove()
1364 		struct rockchip_thermal_sensor *sensor = &thermal->sensors[i];  in rockchip_thermal_remove()
1366 		thermal_remove_hwmon_sysfs(sensor->tzd);  in rockchip_thermal_remove()
1370 	thermal->chip->control(thermal->regs, false);  in rockchip_thermal_remove()
1372 	clk_disable_unprepare(thermal->pclk);  in rockchip_thermal_remove()
1373 	clk_disable_unprepare(thermal->clk);  in rockchip_thermal_remove()
1383 	for (i = 0; i < thermal->chip->chn_num; i++)  in rockchip_thermal_suspend()
1384 		rockchip_thermal_toggle_sensor(&thermal->sensors[i], false);  in rockchip_thermal_suspend()
1386 	thermal->chip->control(thermal->regs, false);  in rockchip_thermal_suspend()
1388 	clk_disable(thermal->pclk);  in rockchip_thermal_suspend()
1389 	clk_disable(thermal->clk);  in rockchip_thermal_suspend()
1402 	error = clk_enable(thermal->clk);  in rockchip_thermal_resume()
1406 	error = clk_enable(thermal->pclk);  in rockchip_thermal_resume()
1408 		clk_disable(thermal->clk);  in rockchip_thermal_resume()
1412 	rockchip_thermal_reset_controller(thermal->reset);  in rockchip_thermal_resume()
1414 	thermal->chip->initialize(thermal->grf, thermal->regs,  in rockchip_thermal_resume()
1415 				  thermal->tshut_polarity);  in rockchip_thermal_resume()
1417 	for (i = 0; i < thermal->chip->chn_num; i++) {  in rockchip_thermal_resume()
1418 		int id = thermal->sensors[i].id;  in rockchip_thermal_resume()
1420 		thermal->chip->set_tshut_mode(id, thermal->regs,  in rockchip_thermal_resume()
1421 					      thermal->tshut_mode);  in rockchip_thermal_resume()
1423 		error = thermal->chip->set_tshut_temp(&thermal->chip->table,  in rockchip_thermal_resume()
1424 					      id, thermal->regs,  in rockchip_thermal_resume()
1425 					      thermal->tshut_temp);  in rockchip_thermal_resume()
1428 				__func__, thermal->tshut_temp, error);  in rockchip_thermal_resume()
1431 	thermal->chip->control(thermal->regs, true);  in rockchip_thermal_resume()
1433 	for (i = 0; i < thermal->chip->chn_num; i++)  in rockchip_thermal_resume()
1434 		rockchip_thermal_toggle_sensor(&thermal->sensors[i], true);  in rockchip_thermal_resume()
1446 		.name = "rockchip-thermal",
1459 MODULE_ALIAS("platform:rockchip-thermal");